UC3901D现货热卖使用介绍供应商报价哪里找芯片批发报价-中国IC网-芯三七

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产品型号UC3901D的概述

UC3901D芯片的概述 UC3901D是一款高度集成的电源管理IC，主要用于电池充电器和电源转换器的应用。该芯片专为高效、低成本的电源解决方案而设计，具有多种保护功能，包括过电流、过温和电压保护。UC3901D的核心特点在于其出色的控制逻辑和精确的电压调节能力，使其成为在便携式设备以及工业电源系统中不可或缺的组件。该芯片在设计时充分考虑了现代电子设备对电源效率和安全性的高要求。通过其内置的PWM（脉宽调制）控制器，UC3901D能够在多种工作模式下（例如，恒流充电和恒压充电）自如切换。这使其成为多种电池类型（如锂离子电池、铅酸电池等）的理想选择，同时也提升了整体充电效率并延长了电池的使用寿命。 UC3901D的详细参数 UC3901D的主要参数包括： - 输入电压范围：4.5V至25V - 输出电压调节范围：可调，典型值为5V到20V - 输出电流范围：最大2A - 开关频率：10...

产品型号UC3901D的Datasheet PDF文件预览

UC1901

UC2901

UC3901

Isolated Feedback Generator

FEATURES

DESCRIPTION

• An Amplitude-Modulation System for

Transformer Coupling an Isolated

Feedback Error Signal

The UC1901 family is designed to solve many of the problems associ-

ated with closing a feedback control loop across a voltage isolation

boundary. As a stable and reliable alternative to an optical coupler, these

devices feature an amplitude modulation system which allows a loop er-

ror signal to be coupled with a small RF transformer or capacitor.

• Low-Cost Alternative to Optical

Couplers

The programmable, high-frequency oscillator within the UC1901 series

permits the use of smaller, less expensive transformers which can readily

be built to meet the isolation requirements of today's line-operated power

systems. As an alternative to RF operation, the external clock input to

these devices allows synchronization to a system clock or to the switch-

ing frequency of a SMPS.

• Internal 1% Reference and Error

Amplifier

• Internal Carrier Oscillator Usable to

5MHz

• Modulator Synchronizable to an

External Clock

An additional feature is a status monitoring circuit which provides an active-

low output when the sensed error voltage is within 10% of the reference.

• Loop Status Monitor

The DRIVERA output, DRIVERB output, and STATUS output are disabled

until the input supply has reached a sufficient level to allow proper operation

of the device.

Since these devices can also be used as a DC driver for optical couplers,

the benefits of 4.5 to 40V supply operation, a 1% accurate reference, and a

high gain general purpose amplifier offer advantages even though an AC

system may not be desired.

UC1901 SIMPLIFIED SCHEMATIC

UDG-98080

11/98

UC1901

UC2901

UC3901

CONNECTION DIAGRAMS

ABSOLUTE MAXIMUM RATINGS (Note 1)

Input Supply Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . 40V

Reference Output Current . . . . . . . . . . . . . . . . . . . . . . . –10mA

Driver Output Currents . . . . . . . . . . . . . . . . . . . . . . . . . . –35mA

Status Indicator Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V

Status Indicator Current . . . . . . . . . . . . . . . . . . . . . . . . . . 20mA

Ext. Clock Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V

Error Amplifier Inputs . . . . . . . . . . . . . . . . . . . . . –0.5V to +35V

Power Dissipation at TA = 25°C. . . . . . . . . . . . . . . . . . 1000mW

Power Dissipation at TC = 25°C . . . . . . . . . . . . . . . . . 2000mW

Operating Junction Temperature . . . . . . . . . . –55°C to +150°C

Storage Temperature . . . . . . . . . . . . . . . . . . . –65°C to +150°C

Lead Temperature (Soldering, 10 seconds) . . . . . . . . . . 300°C

DIL-14, SOIC-14 (TOP VIEW)

J or N Package, D Package

Note 1: Voltages are referenced to ground, Pin 7. Currents are

positive into, negative out of the specified terminal.

Note 2: Consult Packaging section of Databook for thermal limi-

tations and considerations of package.

PLCC-20, LCC-20 (TOP VIEW)

Q, L Packages

SOIC-16 Wide (TOP VIEW)

DW Package

TEMPERATURE AND PACKAGE SELECTION

GUIDE

TEMPERATURE

RANGE

AVAILABLE

PACKAGES

UC1901

UC2901

UC3901

–55°C to +125°C

–40°C to +85°C

0°C to +70°C

J, L

D, DW, J, N, Q

UC1901

UC2901

UC3901

ELECTRICAL CHARACTERISTICS Unless otherwise stated, these specifications apply for V_IN= 10V, R_T= 10kΩ, C_T=

820pF, T_A= T_J.

PARAMETER

TEST CONDITIONS

UC1901/UC2901

MIN TYP MAX

UC3901

TYP

UNITS

MIN

MAX

Reference Section

Output Voltage

T_J= 25°C

_MIN≤ T_J≤ T_MAX

1.485

1.470

1.5 1.515 1.47

1.5 1.530 1.455

1.5

1.53

1.545

Line Regulation

V_IN= 4.5 to 35V

I_OUT= 0 to 5mA

T_J= 25°C

Load Regulation

Short Circuit Current

–35

–55

–35

–55

Error Amplifier Section (To Compensation Terminal)

Input Offset Voltage

Input Bias Current

Input Offset Current

Small Signal Open Loop Gain

CMRR

V_CM= 1.5V

–3

–6

µA

–1

0.1

µA

0.4

–2

0.4

–2

V_CM= 0.5 to 7.5V

V_IN= 2 to 25V

PSRR

100

0.7

150

–3

100

0.7

150

–3

Output Swing, ∆ VO

Maximum Sink Current

Maximum Source Current

Gain Band Width Product

Slew Rate

µA

MHz

V/µS

0.3

Modulators/Drivers Section (From Compensation Terminal)

Voltage Gain

2.8

Output Swing

1.6

2.8

1.6

500

–15

Driver Sink Current

500

–15

700

–35

700

–35

µA

Driver Source Current

MHz

Gain Band Width Product

Oscillator Section

Initial Accuracy

T_J= 25°C

_MIN≤ T_J≤ T_MAX

140

130

150

160

170

.35

130

120

150

170

180

.60

kHz

%/V

MHz

Line Sensitivity

V_IN= 5 to 35V

.15

Maximum Frequency

Ext. Clock Low Threshold

Ext. Clock High Threshold

Status Indicator Section

Input Voltage Window

Saturation Voltage

R_T= 10k, C_T= 10pF

Pin 1 (C_T) = V_IN

0.5

1.6

170

@ E/A Inputs, V_CM= 1.5V

E/A ∆ Input = 0V, I_SINK= 1.6mA

Pin 13 = 3V, E/A ∆ Input = 0.0V

Pin 13 = 40V, E/A ∆Input = 0.2V

V_IN= 35V

135

150

165

130

150

0.45

Max. Output Current

Leakage Current

.05

µA

Supply Current

UVLO Section

Drivers Enabled Threshold

At Input Supply V_IN

3.9

4.5

3.9

4.5

Status Output Enabled

Threshold

Change in Reference Output

When V_INReaches UVLO

Threshold

–2

–30

–2

–30

UC1901

UC2901

UC3901

Note: Transformer Data: N1 = N2 = 20TAWG 26

Core = Ferroxcube 3E2A Ferrite, 0.5" O.D. toroid

Carrier Frequency = 1MHz

Figure 1. Transformer Coupled Open Loop Transfer Function

Figure 2. Oscillator Frequency

APPLICATION INFORMATION

Figure 3. Typical Driver Output Swing vs

Temperature

The error amplifier compensation terminal, Pin 12, is in- With the internal oscillator the squarewave will have a

tended as a source of feedback to the amplifier's invert- fixed 50% duty cycle. If the internal oscillator is disabled

ing input at Pin 11. For most applications, a series DC by connecting Pin 1, C , to V then the frequency and

blocking capacitor should be part of the feedback net- duty cycle of the output will be determined by the input

work. The amplifier is internally compensated for unity clock waveform at Pin 2. If the oscillator remains disabled

feedback.

and there is not clock input at Pin 2, there will be a linear

12dB of signal gain to one or the other of the driver out-

puts depending on the DC state of Pin 2.

The waveform at the driver outputs is a squarewave with

an amplitude that is proportional to the error amplifier in-

put signal. There is a fixed 12dB of gain from the error The driver outputs are emitter followers which will source

amplifier compensation pin to the modulator driver out- a minimum of 15mA of current. The sink current, inter-

puts. The frequency of the output waveform is controlled

by either the internal oscillator or an external clock signal.

nally limited at 700µA, can be increased by adding resis-

tors to ground at the driver outputs.

UC1901

UC2901

UC3901

APPLICATION INFORMATION (continued)

Figure 4. R.F. Transformer Coupled Feedback

Figure 5. Feedback Coupled at Switching Frequency

UC1901

UC2901

UC3901

TYPICAL APPLICATION

UDG-98196

Figure 6. Optically Coupled DC Feedback

UNITRODE CORPORATION

7 CONTINENTAL BLVD. • MERRIMACK, NH 03054

TEL. (603) 424-2410 • FAX (603) 424-3460

IMPORTANT NOTICE

Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue

any product or service without notice, and advise customers to obtain the latest version of relevant information

to verify, before placing orders, that information being relied on is current and complete. All products are sold

subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those

pertaining to warranty, patent infringement, and limitation of liability.

TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in

accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent

TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily

performed, except those mandated by government requirements.

CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF

DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL

APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR

WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER

CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO

BE FULLY AT THE CUSTOMER’S RISK.

In order to minimize risks associated with the customer’s applications, adequate design and operating

safeguards must be provided by the customer to minimize inherent or procedural hazards.

TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent

that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other

intellectual property right of TI covering or relating to any combination, machine, or process in which such

semiconductor products or services might be or are used. TI’s publication of information regarding any third

party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.

UC3901D相关文章

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UC3901D产品参数

型号:	UC3901D
Brand Name：	Texas Instruments
是否无铅：	不含铅
是否Rohs认证：	符合
生命周期：	Active
零件包装代码：	SOIC
包装说明：	SOP, SOP14,.25
针数：	14
Reach Compliance Code：	compliant
ECCN代码：	EAR99
HTS代码：	8542.39.00.01
风险等级：	0.66
模拟集成电路 - 其他类型：	ANALOG CIRCUIT
JESD-30 代码：	R-PDSO-G14
JESD-609代码：	e4
长度：	8.65 mm
湿度敏感等级：	2
信道数量：	1
功能数量：	1
端子数量：	14
最高工作温度：	70 °C
最低工作温度：
封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP
封装等效代码：	SOP14,.25
封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE
峰值回流温度（摄氏度）：	260
认证状态：	Not Qualified
座面最大高度：	1.58 mm
子类别：	Other Analog ICs
最大供电电压 (Vsup)：	40 V
最小供电电压 (Vsup)：	4.5 V
标称供电电压 (Vsup)：	10 V
表面贴装：	YES
技术：	BIPOLAR
温度等级：	COMMERCIAL
端子面层：	Nickel/Palladium/Gold (Ni/Pd/Au)
端子形式：	GULL WING
端子节距：	1.27 mm
端子位置：	DUAL
处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	3.91 mm
Base Number Matches：	1

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