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产品型号NCP5007SNT1的概述

NCP5007SNT1芯片概述 NCP5007SNT1 是一种高效的低压线性稳压器，主要用于移动通信设备、便携式电子产品以及各类电源管理应用。这款芯片由意法半导体（ON Semiconductor）生产，广泛应用于低功耗设备的电源管理，由于其高效节能和低噪声特性，使其在现代电子设计中得到了广泛的关注。 NCP5007SNT1的详细参数 NCP5007SNT1提供了多种电气特性，关键参数如下： - 输入电压范围：3.6V至20V - 输出电压：固定输出为3.3V，具有广泛的调整能力（可定制） - 最大输出电流：1A - 静态电流：约为60µA，适合于低功耗应用 - 负载调整率：优于0.1% - 温度范围：工作温度在-40°C至+125°C之间 - 封装类型：SOT-223，表面贴装 - 噪声性能：低输出噪声，适合敏感设备 - 保护特性：内置过流保护、过热保护功能，增加使用安全性这些参数...

产品型号NCP5007SNT1的Datasheet PDF文件预览

NCP5007

Compact Backlight LED

Boost Driver

The NCP5007 is a high efficiency boost converter operating in a

current control loop, based on a PFM mode, to drive White LEDs. The

current mode regulation allows a uniform brightness of the LEDs. The

chip has been optimized for small ceramic capacitors and is capable of

supplying up to 1.0 W output power.

http://onsemi.com

Features

MARKING

DIAGRAM

• Inductor Based Converter brings High Efficiency

• Constant Output Current Regulation

• 2.7 to 5.5 V Input Voltage Range

TSOP−5

(SOT23−5, SCR59−5)

SN SUFFIX

DCLYW

• V to 22 V Output Compliance Allows up to 5 LEDs to be Driven

out

CASE 483

in Series which Provides Automatic LED Current Matching

• Built−in Output Overvoltage Protection

• 0.3 mA Standby Quiescent Current

DCL = Device Code

= Year

• Includes Dimming Function (PWM)

• Enable Function Driven Directly from Low Battery Voltage Source

• Thermal Shutdown Protection

= Work Week

• All Pins are Fully ESD Protected

• Low EMI Radiation

PIN CONNECTIONS

• Pb−Free Package is Available

bat

Typical Applications

• LED Display Back Light Control

• High Efficiency Step Up Converter

GND

out

(Top View)

bat

ORDERING INFORMATION

†

Device

Package

Shipping

bat

NCP5007SNT1

TSOP−5 3000 Tape & Reel

4.7 mF

NCP5007SNT1G

TSOP−5 3000 Tape & Reel

(Pb−Free)

GND

22 mH

†For information on tape and reel specifications,

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specifications

Brochure, BRD8011/D.

out

GND

MBR0530

1.0 mF

NCP5007

5.6 W

GND

Figure 1. Typical Application

Semiconductor Components Industries, LLC, 2004

Publication Order Number:

July, 2004 − Rev. 4

NCP5007/D

NCP5007

Thermal

Shutdown

Current Sense

bat

Vsense

bat

out

100 k

GND

CONTROLLER

GND

−

300 k

GND

+200 mV

Band Gap

Figure 2. Block Diagram

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NCP5007

PIN FUNCTION DESCRIPTION

Symbol

Type

Description

ANALOG

INPUT

This pin provides the output current range adjustment by means of a sense resistor connected

to the analog control or with a PWM control. The dimming function can be achieved by applying

a PWM voltage technique to this pin (see Figure 29). The current output tolerance depends

upon the accuracy of this resistor. Using a "5% metal film resistor, or better, yields good output

current accuracy. Note: A built−in comparator switches OFF the DC−DC converter if the voltage

sensed across this pin and ground is higher than 700 mV typical.

GND

POWER

This pin is the system ground for the NCP5007 and carries both the power and the analog

signals. High quality ground must be provided to avoid spikes and/or uncontrolled operation.

Care must be observed to avoid high−density current flow in a limited PCB copper track so a

robust ground plane connection is recommended.

DIGITAL

INPUT

This is an Active−High logic input which enables the boost converter. The built−in pulldown

resistor disables the device when the EN pin is left open. Note the logic switching level of this

input has been optimized to allow it to be driven from standard or 1.8 V CMOS logic levels.

The LED brightness can be controlled by applying a pulse width modulated signal to the enable

pin (see Figure 30).

out

POWER

This pin is the power side of the external inductor and must be connected to the external

Schottky diode. It provides the output current to the load. Since the boost converter operates in

a current loop mode, the output voltage can range up to +22 V but shall not exceed this limit.

However, if the voltage on this pin is higher than the OVP threshold (Over Voltage Protection)

the device enters a shutdown mode. To restart the chip, one must either apply a low to high logic

signal to the EN pin, or switch off the V supply.

bat

A capacitor must be used on V to avoid false triggering of the OVP (Overvoltage Protect)

out

circuit. This capacitor filters the noise created by the fast switching transients. In order to limit

the inrush current and still have acceptable startup time the capacitor value should range

between 1.0 mF and 8.2 mF max. To achieve high efficiency this capacitor should be ceramic

(ESR t 100 mW).

Care must be observed to avoid EMI through the PCB copper tracks connected to this pin.

bat

POWER

The external voltage supply is connected to this pin. A high quality reservoir capacitor must be

connected across pin 5 and Ground to achieve the specified output voltage parameters. A

4.7 mF/6.3 V, low ESR capacitor must be connected as close as possible across pin 5 and

ground pin 2. The X5R or X7R ceramic MURATA types are recommended.

The return side of the external inductor shall be connected to this pin. Typical application will

use a 22 mH, size 1210, to handle the 10 to 100 mA output current range. When the desired

output current is above 20 mA, the inductor shall have an ESR v1.5 W to achieve good

efficiency over the V range. The output current tolerance can be improved by using a larger

bat

inductor value.

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NCP5007

MAXIMUM RATINGS

Rating

Symbol

Value

6.0

Unit

Power Supply

bat

Output Power Supply Voltage Compliance

out

Digital Input Voltage

Digital Input Current

−0.3 v V v V +0.3

bat

1.0

ESD Capability (Note 1)

Human Body Model (HBM)

Machine Model (MM)

ESD

2.0

200

TSOP5 Package

Power Dissipation @ T = +85°C (Note 2)

160

250

°C/W

Thermal Resistance, Junction−to−Air

Operating Ambient Temperature Range

Operating Junction Temperature Range

Maximum Junction Temperature

−25 to +85

−25 to +125

+150

°C

Jmax

Storage Temperature Range

stg

−65 to +150

Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit

values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied,

damage may occur and reliability may be affected.

1. This device series contains ESD protection and exceeds the following tests:

Human Body Model (HBM) "2.0 kV per JEDEC standard: JESD22−A114

Machine Model (MM) "200 V per JEDEC standard: JESD22−A115

2. The maximum package power dissipation limit must not be exceeded.

3. Latchup current maximum rating: "100 mA per JEDEC standard: JESD78.

4. Moisture Sensivity Level (MSL): 1 per IPC/JEDEC standard: J−STD−020A.

POWER SUPPLY SECTION (Typical values are referenced to T = +25°C, Min & Max values are referenced −25°C to +85°C ambient

temperature, unless otherwise noted.)

Rating

Symbol

Min

2.7

Typ

−

Max

5.5

−

Unit

Power Supply

bat

Output Load Voltage Compliance

Continuous DC Current in the Load

24.5

−

out

−

@ V = 3 LED, L = 22 mH, ESR < 1.5 W, V = 3.6 V

out

bat

Standby Current @ I = 0 mA, EN = L, V = 3.6 V

−

0.45

−

out

bat

stdb

Standby Current @ I = 0 mA, EN = L, V = 5.5 V

−

1.0

3.0

−

out

bat

stdb

Inductor Discharging Time @ V = 3.6 V, L = 22 mH, 3 LED,

Toffmax

320

bat

= 10 mA

out

Thermal Shutdown Protection

−

160

−

°C

Thermal Shutdown Protection Hysteresis

SDH

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NCP5007

ANALOG SECTION (Typical values are referenced to T = +25°C, Min & Max values are referenced −25°C to +85°C ambient

temperature, unless otherwise noted.)

Rating

Symbol

Min

Typ

Max

Unit

High Level Input Voltage

Low Level Input Voltage

1.3

−

0.4

EN Pull Down Resistor

−

170

−

100

200

100

−

230

−

Feedback Voltage Threshold

Output Current Stabilizes @ 5% time delay following a

outdly

DC−DC startup @ V = 3.6 V, L = 22 mH, I = 20 mA

bat

out

Internal Switch ON Resistor @ T

= +25°C

−

1.7

−

amb

DSON

5. The overall tolerance depends upon the accuracy of the external resistor.

THEORY OF OPERATION

The DC−DC converter is designed to supply a constant

current to the external load, the circuit being powered from

a standard battery supply. Since the regulation is made by

means of a current loop, the output voltage will vary

depending upon the dynamic impedance presented by the

load.

Considering a high intensity LED, the output voltage can

range from a low of 6.4 V (two LED in series biased with a

low current), up to 22 V, the maximum the chip can sustain

continuously. The basic DC−DC structure is depicted in

Figure 3.

With a 22 V operating voltage capability, the power

device Q1 can accommodate a high voltage source without

any leakage current degradation.

bat

22 mH

Vdsense

POR

Vds

TIME_OUT

ZERO_CROSSING

GND

RESET

LOGIC

CONTROL

Vdsense

GND

−

V(Ipeak)

−

Vref

GND

Figure 3. Basic DC−DC Converter Structure

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NCP5007

Basically, the chip operates with two cycles:

flip−flop resets, the NMOS is deactivated and the current is

dumped into the load. Since the timing is application

dependent, the internal timer limits the Toff cycle to 320 ns

(typical), making sure the system operates in a continuous

mode to maximize the energy transfer.

Cycle #1 : time t1, the energy is stored into the inductor

Cycle #2 : time t2, the energy is dumped to the load

The POR signal sets the flip−flop and the first cycle takes

place. When the current hits the peak value, defined by the

error amplifier associated with the loop regulation, the

First Startup

Normal Operation

Ipeak

0 mA

Ids

0 mA

Figure 4. Basic DC−DC Operation

Based on the data sheet, the current flowing into the

inductor is bounded by two limits:

• Ipeak Value: Internally fixed to 350 mA typical

• Iv Value: Limited by the fixed Toff time built in the

chip (320 ns typical)

The system operates in a continuous mode as depicted in

Of course, from a practical stand point, the inductor must

be sized to cope with the peak current present in the circuit

to avoid saturation of the core. On top of that, the ferrite

material shall be capable to operate at high frequency

(1.0 MHz) to minimize the Foucault’s losses developed

during the cycles.

The operating frequency can be derived from the

Figure 4 and t & t times can be derived from basic

electrical parameters. Let V = Vo − V , rearranging

bat

equations. (Note: The equations are for theoretical analysis

only, they do not include the losses.)

Equation 1:

dI * L

(eq. 5)

ton +

(eq. 1)

E + L *

Since toff is nearly constant (according to the 320 ns

typical time), the dI is constant for a given load and

inductance value. Rearranging Equation 5 yields:

Let E = V , then:

bat

(Ip * Iv) * L

(eq. 2)

(eq. 3)

t1 +

t2 +

Vbat

^V*dt* L

(Ip * Iv) * L

Vo * Vbat

(eq. 6)

ton +

Let E = V , and Vopk = output peak voltage, then:

bat

Since t = 320 ns typical and Vo = 22 V maximum, then

(assuming a typical V = 3.0 V):

(Vopk * Vbat) * dt

bat

(eq. 7)

ton +

Vbat

t2 * (Vo * Vbat)

DI +

Finally, the operating frequency is:

(eq. 4)

(eq. 8)

F +

* 9

320e

* (22 * 3.0)

* 6

ton ) toff

DImax +

+ 276 mA

22e

The output power supplied by the NCP5007 is limited to

one watt: Figure 5 shows the maximum power that can be

delivered by the chip as a function of the input voltage.

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NCP5007

1200

400

3 LED

L = 22µH

= 10W

T = +25°C

1000

800

sense

350

300

2 LED

4 LED

5 LED

600

250

200

400

200

out

= f(V ) @ R

= 2.0 W

bat

sense

150

bat

(V)

bat

(V)

Test conditions: 5 LEDs in series, steady state operation

Figure 5. Maximum Output Power as a Function of

the Battery Supply Voltage

Figure 6. Typical Inductor Peak Current as a

Function of V_batVoltage

120

100

2 LED

3 LED

4 LED

5 LED

2.5

3.0

3.5

4.0

(V)

4.5

5.0

5.5

bat

Test conditions: L = 22 mH, Rsense = 2.0 W, Tamb = +25°C

Figure 7. Maximum Output Current as a Function of V_bat

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NCP5007

Output Current Range Set−Up

The current regulation is achieved by means of an external sense resistor connected in series with the LED string.

bat

22 mH

out

CONTROLLER

GND

Figure 8. Output Current Feedback

Feedback Threshold

200 mV

10 mA

The current flowing through the LED creates a voltage

drop across the sense resistor R1. The voltage drop is

constantly monitored internally, and maximum peak current

allowed in the inductor is set accordingly in order to keep

constant this voltage drop (and thus the current flowing

through the LED). For example, should one need a 10 mA

output current, the sense resistor should be sized according

to the following equation:

(eq. 9)

+ 20 W

out

A standard 5% tolerance resistor, 22 W SMD device,

yields 9.09 mA, good enough to fulfill the back light

demand. The typical application schematic diagram is

provided in Figure 9.

bat

Pulse

bat

4.7 mF

GND

22 mH

out

GND

MBR0530

1.0 mF

NCP5007

GND

22 W

LED

Figure 9. Basic Schematic Diagram

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NCP5007

Output Load Drive

The Schottky diode D1, associated with capacitor C2 (see

Figure 9), provides a rectification and filtering function.

When a pulse−operating mode is required:

• A PWM mode control can be used to adjust the output

current range by means of a resistor and a capacitor

connected across FB pin. On the other hand, the

Schottky diode can be removed and replaced by at least

one LED diode, keeping in mind such LED shall

sustain the large pulsed peak current during the

operation.

In order to take advantage of the built−in Boost

capabilities, one shall operate the NCP5007 in the

continuous output current mode. Such a mode is achieved by

using and external reservoir capacitor (see Table 1) across

the LED.

At this point, the peak current flowing into the LED diodes

shall be within the maximum ratings specified for these

devices. Of course, pulsed operation can be achieved, thanks

to the EN signal pin 3, to force high current into the LED

when necessary.

TYPICAL OPERATING CHARACTERISTICS

100

4 LED/10 mA

4 LED/4 mA

5 LED/4 mA

5 LED/10 mA

2 LED/10 mA

3 LED/10 mA

3 LED/4 mA

2 LED/4 mA

2.50

3.00

3.50

4.00

Vbat (V)

4.50

5.00

5.50

2.50

3.00

3.50

4.00

4.50

5.00

5.50

Vbat (V)

Figure 10. Overall Efficiency vs. Power Supply −

Figure 11. Overall Efficiency vs. Power Supply −

I_out= 4.0 mA, L = 22 mH

I_out= 10 mA, L = 22 mH

100

3 LED/15 mA

3 LED/20 mA

5 LED/20 mA

5 LED/15 mA

2 LED/15 mA

4 LED/15 mA

2 LED/20 mA

4 LED/20 mA

2.50

3.00

3.50

4.00

4.50

5.50

2.50

3.00

3.50

4.00

4.50

5.00

5.50

5.00

Vbat (V)

Figure 12. Overall Efficiency vs. Power Supply −

Figure 13. Overall Efficiency vs. Power Supply −

I_out= 15 mA, L = 22 mH

I_out= 20 mA, L = 22 mH

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NCP5007

TYPICAL OPERATING CHARACTERISTICS

(All curve conditions: L = 22 mH, Cin = 4.7 mF, C = 1.0 mF, Typical curve @ T = +25°C)

out

100

2 LED/40 mA

3 LED/40 mA

= 20 mA Nom

OUT

5 LED/40 mA

4 LED/40 mA

= 10 mA Nom

OUT

L = 22 mH

T = 25°C

2.5

3.0

3.5

4.0

(V)

4.5

5.0

5.5

2.50

3.00

3.50

4.00

(V)

4.50

5.00

5.50

bat

BAT

Figure 14. Overall Efficiency vs. Power Supply −

Figure 15. Current Variation vs. Power Supply with

3 Series LED’s

I_out= 40 mA, L = 22 mH

= 20 mA Nom

OUT

= 10 mA Nom

OUT

L = 22 mH

T = 25°C

L = 22 mH

T = 25°C

2.5

3.0

3.5

4.0

(V)

4.5

5.0

5.5

2.5

3.0

3.5

4.0

(V)

4.5

5.0

5.5

BAT

Figure 16. Current Variation vs. Power Supply with

4 Series LED’s

Figure 17. Current Variation vs. Power Supply with

5 Series LED’s

205

204

203

202

201

200

199

198

197

bat

= 3.1 V thru 5.5 V

bat

= 3.1V thru 5.5V

−1

−2

−3

196

195

−40

−4

−5

−40

−20

100

−20

100

TEMPERATURE (°C)

Figure 18. Feedback Voltage Stability

Figure 19. Feedback Voltage Variation

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NCP5007

TYPICAL OPERATING CHARACTERISTICS

(All curve conditions: L = 22 mH, Cin = 4.7 mF, C = 1.0 mF, Typical curve @ T = +25°C)

out

2.5

2.0

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0.0

−40°C thru 125°C

2 LED

1.5

1.0

0.5

3 LED

4 LED

5 LED

2.7

3.3

3.9

4.5

5.1

5.5

2.5

3.0

3.5

4.0

(V)

4.5

5.0

5.5

bat

, BATTERY VOLTAGE (V)

bat

Figure 20. Standby Current

Figure 21. Typical Operating Frequency

bat

= 3.6V

= 2.7V

bat

= 5.5V

bat

−40 −20

100 120130

TEMPERATURE(°C)

Figure 22. Overvoltage Protection

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NCP5007

TYPICAL OPERATING WAVEFORMS

out

Inductor

Current

Conditions: V = 3.6 V, L = 22 mH, 5 LED, I = 15 mA

bat

out

Figure 23. Typical Power Up Response

out

Inductor

Current

Conditions: V = 3.6 V, L = 22 mH, 5 LED, I = 15 mA

bat

out

Figure 24. Typical Startup Inductor Current and Output Voltage

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NCP5007

TYPICAL OPERATING WAVEFORMS

Inductor

Current

Conditions: V = 3.6 V, L = 22 mH, 5 LED, I = 15 mA

bat

out

Figure 25. Typical Inductor Current

out

Ripple

50 mV/div

Inductor

Current

Conditions: V = 3.6 V, L = 22 mH, 5 LED, I = 15 mA

bat

out

Figure 26. Typical Output Voltage Ripple

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NCP5007

TYPICAL OPERATING WAVEFORMS

Output Voltage

Inductor Current

Test Conditions: L = 22 mH, I = 15 mA, V = 3.6 V, Ambient Temperature, LED = 5

out

bat

Figure 27. Typical Output Peak Voltage

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NCP5007

TYPICAL APPLICATIONS CIRCUITS

Standard Feedback

The standard feedback provides constant current to the

LEDs, independently of the V supply and number of

LEDs in series. Figure 28 depicts a typical application to

supply 13 mA to the load.

bat

4.7 mF

22 mH

GND

out

MBR0530

NCP5007

1.0 mF

GND

15 W

LED LED LED

LED

Figure 28. Basic DC Current Mode Operation with

Analog Feedback

PWM Operation

Although the pulsed mode will provide a good dimming

function, it will yield high switching transients which are

difficult to filter out in the control loop. As such this first

approach is not recommended. The output current depends

upon the duty cycle of the signal presented to the node pin 1:

this is very similar to the digital control shown in Figure 30.

The average mode yields a noise−free operation since the

converter operates continuously, together with a very good

dimming function. The cost is an extra resistor and one extra

capacitor, both being low cost parts.

The analog feedback pin 1 provides a way to dim the LED

by means of an external PWM signal as depicted in

Figure 29. Taking advantage of the high internal impedance

presented by the FB pin, one can set up a simple R/C network

to accommodate such a dimming function. Two modes of

operation can be considered:

• Pulsed mode, with no filtering

• Averaged mode with filtering capacitor

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NCP5007

bat

4.7 mF

22 mH

Average Network

GND

out

PWM

MBR0530

10 k

150 k

NCP5007

1.0 mF

100 nF

5.6 k

GND

10 W

LED LED LED

Sense Resistor

LED

NOTE: RC filter R2 and C3 is optional (see text)

Figure 29. Basic DC Current Mode Operation with PWM Control

To implement such a function, lets consider the feedback

input as an operational amplifier with a high impedance input

(reference schematic Figure 29). The analog loop will keep

going to balance the current flowing through the sense

resistor R1 until the feedback voltage is 200 mV. An extra

resistor (R4) isolates the FB node from low resistance to

ground, making possible to add an external voltage to this pin.

The time constant R2/C3 generates the voltage across C3,

added to the node pin 1, while R2/R3/R4/R1/C3 create the

discharge time constant. In order to minimize the pick up

noise at FB node, the resistors shall have relative medium

value, preferably well below 1.0 MW. Consequently, let

R2 = 150 k, R3 = 10 k and R4 = 5.6 k. In addition, the

feedback delay to control the luminosity of the LED shall be

acceptable by the user, 10 ms or less being a good

compromise. The time constant can now be calculated based

on a 400 mV offset voltage at the C3/R2/R3 node to force

zero current to the LED. Assuming the PWM signal comes

from a standard gate powered by a 3.0 V supply, running at

5.0 kHz, then full dimming of the LED can be achieved with

a 95% span of the Duty Cycle signal.

Digital Control

An alternative method of controlling the luminosity of the

LEDs is to apply a PWM signal to the EN pin (see

Figure 30). The output current depends upon the Duty

Cycle, but care must be observed as the DC−DC converter

is continuously pulsed ON/OFF and noise is likely to be

generated.

bat

Pulse

bat

4.7 mF

22 mH

GND

out

MBR0530

NCP5007

1.0 mF

5.6 W

GND

NOTE: Pulse width and frequency depends upon the application constraints.

Figure 30. Typical Semi−Pulsed Mode of Operation

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NCP5007

Typical LEDs Load Mapping

Since the output power is battery limited (see Figure 5),

one can arrange the LEDs in a variety of different

configurations. Powering ten LEDs can be achieved by a

series/parallel combination as depicted in Figure 31.

50 mA

75 mA

Load

LED

D10

LED

Sense

Resistor

2.7 W

LED

GND

60 mA

Load

Sense

LED

D10

LED

D13

LED

3.9 W

Resistor

GND

LED

D11

LED

D14

LED

D12

LED

D15

LED

Test conditions:

= 3.6 V

= 22 mH

= 1.0 mF

bat

out

Sense

Resistor

3.3 W

GND

Figure 31. Examples of Possible LED Arrangements

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NCP5007

ON Semiconductor provides a demo board to evaluate the performance of the NCP5007. The schematic for that demo board

is illustrated in Figure 32.

TP3

bat

4.7 mF/10 V

GND

SELECT

MANUAL

JP1

ISense

GND

bat

TP1

out

22 mH

10 k

GND

out

0 R

MBR0530

BRIGHTNESS

GND

10 k

NCP5007

MODULATION

Jumper = 0 W

TP2

150 k

GND

100 nF

5.6 k

bat

LED

R10

10 R

GND

PWR

LED LED LED

LED

GND

bat

Figure 32. NCP5007 Demo Board Schematic Diagram

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NCP5007

Table 1. Recommended External Parts

Part

Manufacturer

Description

Part Number

MBR0530T1

30 V Low Vf Schottky Diode

20 V Low Vf Schottky Diode

Ceramic Cap. 1.0 mF/16 V

Ceramic Cap. 4.7 mF/6.3 V

Inductor 22 mH

ON Semiconductor

MURATA

SOD−123 (1.6 x 3.2 mm)

SOD−323 (1.25 x 2.5 mm)

SOD−563 (1.6 x 1.6 mm)

GRM42−X7R

NSR0320MW2T1

NSR0320XV6T1

GRM42−6X7R−105K16

GRM40−X5R−475K6.3

1008PS−223MC

MURATA

GRM40−X5R

CoilCraft

1008PS−Shielded

Power Wafer

Inductor 22 mH

CoilCraft

LPQ4812−223KXC

Figure 33. NCP5007 Demo Board PCB: Top Layer

Figure 34. NCP5007 Demo Board Top Silkscreen

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NCP5007

FIGURES INDEX

Figure 1: Typical Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 2: Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Figure 3: Basic DC−DC Converter Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 4: Basic DC−DC Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 5: Maximum Output Power as a Function of the Battery Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 6: Typical Inductor Peak Current as a Function of V Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

bat

Figure 7: Maximum Output Current as a Function of V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

bat

Figure 8: Output Current Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 9: Basic Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 10: Overall Efficiency vs. Power Supply − I = 4.0 mA, L = 22 mH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

out

Figure 11: Overall Efficiency vs. Power Supply − I = 10 mA, L = 22 mH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

out

Figure 12: Overall Efficiency vs. Power Supply − I = 15 mA, L = 22 mH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

out

Figure 13: Overall Efficiency vs. Power Supply − I = 20 mA, L = 22 mH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

out

Figure 14: Overall Efficiency vs. Power Supply − I = 40 mA, L = 22 mH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

out

Figure 15: Feedback Voltage Stability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 16: Feedback Voltage Variation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 17: Standby Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 18: Typical Operating Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 19: Overvoltage Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 23: Typical Power Up Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 24: Typical Startup Inductor Current and Output Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 25: Typical Inductor Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 26: Typical Output Voltage Ripple . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 27: Typical Output Peak Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 28: Basic DC Current Mode Operation with Analog Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 29: Basic DC Current Mode Operation with PWM Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 30: Typical Semi−Pulsed Mode of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 31: Examples of Possible LED Arrangements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 32: NCP5007 Demo Board Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 33: NCP5007 Demo Board PCB: Top Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 34: NCP5007 Demo Board Top Silkscreen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

NOTE CAPTIONS INDEX

Note 1:

Note 2:

Note 3:

Note 4:

Note 5:

This device series contains ESD protection and exceeds the following tests . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

The maximum package power dissipation limit must not be exceeded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Latchup current maximum rating: "100 mA per JEDEC standard: JESD78 . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Moisture Sensivity Level (MSL): 1 per IPC/JEDEC standard: J−STD−020A . . . . . . . . . . . . . . . . . . . . . . . . . . 4

The overall tolerance depends upon the accuracy of the external resistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

ABBREVIATIONS

Enable

Feed Back

POR

Power On Reset: Internal pulse to reset the chip when the power supply is applied

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NCP5007

PACKAGE DIMENSIONS

TSOP−5

SN SUFFIX

CASE 483−02

ISSUE C

NOTES:

1. DIMENSIONING AND TOLERANCING PER

ANSI Y14.5M, 1982.

2. CONTROLLING DIMENSION: MILLIMETER.

3. MAXIMUM LEAD THICKNESS INCLUDES

LEAD FINISH THICKNESS. MINIMUM LEAD

THICKNESS IS THE MINIMUM THICKNESS

OF BASE MATERIAL.

4. A AND B DIMENSIONS DO NOT INCLUDE

MOLD FLASH, PROTRUSIONS, OR GATE

BURRS.

MILLIMETERS

DIM MIN MAX

INCHES

MIN MAX

2.90

1.30

0.90

0.25

0.85

3.10 0.1142 0.1220

1.70 0.0512 0.0669

1.10 0.0354 0.0433

0.50 0.0098 0.0197

1.05 0.0335 0.0413

0.013 0.100 0.0005 0.0040

0.05 (0.002)

0.10

0.20

1.25

0.26 0.0040 0.0102

0.60 0.0079 0.0236

1.55 0.0493 0.0610

2.50

3.00 0.0985 0.1181

SOLDERING FOOTPRINT*

1.9

0.074

0.95

0.037

2.4

0.094

1.0

0.039

0.7

0.028

inches

SCALE 10:1

*For additional information on our Pb−Free strategy and soldering

details, please download the ON Semiconductor Soldering and

Mounting Techniques Reference Manual, SOLDERRM/D.

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NCP5007

ON Semiconductor and

are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice

to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability

arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.

“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All

operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights

nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications

intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should

Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates,

and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death

associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal

Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.

PUBLICATION ORDERING INFORMATION

LITERATURE FULFILLMENT:

N. American Technical Support: 800−282−9855 Toll Free

USA/Canada

ON Semiconductor Website: http://onsemi.com

Order Literature: http://www.onsemi.com/litorder

Literature Distribution Center for ON Semiconductor

P.O. Box 61312, Phoenix, Arizona 85082−1312 USA

Phone: 480−829−7710 or 800−344−3860 Toll Free USA/Canada

Fax: 480−829−7709 or 800−344−3867 Toll Free USA/Canada

Email: orderlit@onsemi.com

Japan: ON Semiconductor, Japan Customer Focus Center

2−9−1 Kamimeguro, Meguro−ku, Tokyo, Japan 153−0051

Phone: 81−3−5773−3850

For additional information, please contact your

local Sales Representative.

NCP5007/D

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NCP5007SNT1产品参数

型号:	NCP5007SNT1
是否Rohs认证：	不符合
生命周期：	Obsolete
零件包装代码：	TSOP
包装说明：	SCR-59-5, SOT-23-5, TSOP-5
针数：	5
Reach Compliance Code：	not_compliant
ECCN代码：	EAR99
HTS代码：	8542.39.00.01
风险等级：	5.38
Is Samacsys：	N
接口集成电路类型：	LED DISPLAY DRIVER
JESD-30 代码：	R-PDSO-G5
JESD-609代码：	e0
长度：	3 mm
复用显示功能：	NO
功能数量：	1
区段数：	1
端子数量：	5
最高工作温度：	85 °C
最低工作温度：	-25 °C
封装主体材料：	PLASTIC/EPOXY
封装代码：	TSSOP
封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：	240
认证状态：	Not Qualified
座面最大高度：	1.1 mm
最大供电电压：	5.5 V
最小供电电压：	2.7 V
标称供电电压：	3.6 V
表面贴装：	YES
温度等级：	OTHER
端子面层：	Tin/Lead (Sn80Pb20)
端子形式：	GULL WING
端子节距：	0.95 mm
端子位置：	DUAL
处于峰值回流温度下的最长时间：	30
宽度：	1.5 mm
Base Number Matches：	1

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