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产品型号3055的概述

芯片3055的概述 3055芯片是一种广泛应用于大功率放大器及电子设备电源管理中的功率晶体管。其主要功能是作为放大器或开关使用，以提供有效的电流和电压放大。由于其较高的功率处理能力和优良的热稳定性，3055芯片成为许多音频放大器、开关电源和直流-直流转换器中不可或缺的组成部分。 3055芯片通常被视为一种NPN功率晶体管，其最大电流可达15安培，最大集电极-发射极电压可达60伏特。这些特性使得3055在高功率应用方面表现良好。同时，它的频率响应也适合音频应用，能实现良好的音质输出。芯片3055的详细参数 3055芯片的主要技术参数如下： 1. 类型：NPN功率晶体管 2. 最大集电极-发射极电压 (Vce)：60V 3. 最大集电极电流 (Ic)：15A 4. 最大功耗 (Ptot)：115W 5. 直流增益 (hFE)：50到120（在某一范围内） 6. 封装类型：TO-220 7...

产品型号3055的Datasheet PDF文件预览

3055

MULTIPLEXED

TWO-WIRE HALL EFFECT

SENSOR IC

3055

DISCONTINUED PRODUCT

Shown for Reference Only

MULTIPLEXED TWO-WIRE

HALL-EFFECT SENSOR ICs

The UGN3055U Hall-effect sensor is a digital magnetic sensing IC

capable of communicating over a two-wire power/signal bus. Using a

sequential addressing scheme, the device responds to a signal on the

bus and returns the diagnostic status of the IC, as well as the status of

each monitored external magnetic field. As many as 30 sensors can

function on the same two-wire bus. This IC is ideal for multiple sensor

applications where minimizing the wiring harness size is desirable or

essential.

LOGIC

The device consists of high-resolution bipolar Hall-effect switching

circuitry, the output of which drives high-density CMOS logic stages.

These logic stages decode the address pulse and enable a response

at the appropriate address. The combination of magnetic-field or

switch-status sensing, low-noise amplification of the Hall-transducer

output, and high-density decoding and control logic is made possible

by the development of a new sensor BiMOS fabrication technology.

This unique magnetic sensing IC operates within specifications

between -20°C and +85°C. Alternate magnetic and temperature

specifications are available upon request. It is supplied in a 60 mil

(1.54 mm) thick, three-pin plastic SIP. Each package is clearly marked

with a two-digit decimal device address (xx).

Dwg. PH-005

FEATURES

Pinning is shown viewed from branded side.

■ Complete Multiplexed Hall-Effect IC with

Simple Sequential Addressing Protocol

■ Allows Power and Communication Over a

Two-Wire Bus (Supply/Signal and Ground)

■ Up to 30 Hall-Effect Sensors Can Share a Bus

■ Sensor Diagnostic Capabilities

■ Magnetic-Field or Switch-Status Sensing

ABSOLUTE MAXIMUM RATINGS

■ Low Power of BiMOS Technology Favors

Battery-Powered and Mobile Applications

at T_A= +25°C

Supply Voltage, V_BUS........................... 24 V

■ Ideal for Automotive, Consumer, and Industrial Applications

Magnetic Flux Density, B............ Unlimited

Operating Temperature Range,

T_A.......................... -20°C to +85°C

Storage Temperature Range,

T_S.............................. -55°C to +150°C

Package Power Dissipation,

P_D.................................... 750 mW

Always order by complete part number: UGN3055U

3055

MULTIPLEXED

TWO-WIRE HALL EFFECT

SENSOR IC

OPERATIONAL CHARACTERISTIC over operating temperature range.

Electrical

Characteristics

Limits

Max.

Symbol

V_BUS

I_S

Min.

—

Typ.

—

0.8

1.0

Units

Power Supply Voltage

Signal Current

µA

—

Quiescent Current

V_BUS= 6 V

V_BUS= 9 V

I_QH–I_QL

I_QH

—

2.5

300

I_QL

—

I_Q

—

Address Range

Addr

V_CLH

V_CHL

V_CHYS

t_CLK

V_L

Clock Thresholds

LOW to HIGH

HIGH to LOW

Hysteresis

—

8.5

—

6.5

—

Clock Period

0.1

V_RST

V_CLH

2.5

100

—

Address LOW Voltage

Address HIGH Voltage

Power-On Reset Voltage

Settling Time

V_CHL

V_BUS

5.5

—

V_H

V_RST

t_h

3.5

—

V_BUS= 9 V

µs

kΩ

Ω

V_BUS= 6 V

LOW to HIGH

t_l

—

Propagation Delay

t_plh

—

HIGH to LOW

t_phl

—

Pin 3 Input Resistance

No Magnetic Field (V_OUT= HIGH)

Mag. Field Present (V_OUT= LOW)

R_OUTH

R_OUTL

—

Magnetic Characteristics

Magnetic Thresholds

*Turn-On

Turn-Off

B_OP

B_RP

-25

150

100

300

Hysteresis (B_OP–B_RP

)

B_HYS

*Alternate magnetic switch point specifications are available on request. Please contact the factory.

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

3055

MULTIPLEXED

TWO-WIRE HALL EFFECT

SENSOR IC

SENSOR LOCATION

FUNCTIONAL BLOCK DIAGRAM

(±0.005” [0.13 mm] die placement)

BUS

ACTIVE AREA DEPTH

0.015"

0.071"

0.38 mm

1.80 mm

NOM

REG

COMP

0.084"

2.13 mm

RESET

CLOCK

CMOS LOGIC

SWITCH IN

(OPTIONAL)

BRANDED

SURFACE

GROUND

Dwg. FH-009

Dwg. MH-002A

DEFINITION OF TERMS

Sensor Address

Diagnostic Phase

Each bus sensor has a factory-specified predefined

address. At present, allowable sensor addresses are

integers from 1 to 30.

Period on the bus when the address voltage is at V_H.

During this period, a correctly addressed sensor responds

by increasing its current drain on the bus. This response

from the sensor is called the diagnostic response and

the bus current increase is called the diagnostic current.

LOW-to-HlGH Clock Threshold (V_CLH

)

Minimum voltage required during the positive-going

transition to increment the bus address and trigger a

diagnostic response from the bus sensors. This is also

the maximum threshold of the on-chip comparator, which

Signal Phase

Period on the bus when the address voltage is at V_L. During

this period, a correctly addressed sensor that detects a

magnetic field greater than magnetic Operate Point, B_OP,

responds by maintaining a current drain of I_Son the bus.

This response from the sensor is called the signal response

and the bus current increase is called the signal current.

monitors the supply voltage, V_BUS

HlGH-to-LOW Threshold (V_HL)

Maximum voltage required during the negative-going

transition to trigger a signal current response from the bus

sensors. This is also the maximum threshold of the on-

chip comparator, which monitors the supply voltage, V_BUS.

Sensor Address Response Current (I_S)

Current returned by the bus sensors during the diagnostic and

the signal responses of the bus sensors. This is accomplished

by enabling the constant current source (CCS).

Bus HIGH Voltage (V_H)

Bus HIGH voltage required for addressing. Voltage

Magnetic Operate Point (B_OP)

should be greater than V_CLH

Minimum magnetic field required to switch ON the Hall

amplifier and switching circuitry of the addressed sensor.

This circuitry is only active when the sensor is addressed.

Address LOW Voltage (V_L)

Bus LOW Voltage required for addressing. Voltage

should be greater than V_RSTand less than V_CHL

Magnetic Release Point (B_RP)

Bus Reset Voltage (V_RST

)

Magnetic field required to switch OFF the Hall amplifier

and switching circuitry after the output has switched ON.

This is due to magnetic memory in the switching circuitry.

However, when a device is deactivated by changing the

current bus address, all magnetic memory is lost.

Voltage level required to reset individual sensors.

Sensor Quiescent Current Drain (I_Q)

The current drain of bus sensors when active but not

addressed. I_QHis the maximum quiescent current drain

when the sensor is not addressed and is at V_H. I_QLis the

maximum quiescent current drain when the sensor is not

addressed and is at V_L.

Magnetic Hysteresis (B_HYS

)

Difference between the B_OPand B_RPmagnetic field thresh-

olds.

3055

MULTIPLEXED

TWO-WIRE HALL EFFECT

SENSOR IC

ADDRESSING PROTOCOL

sponds with an increase in its supply current drain (called I_Sduring the

HIGH portion of the address cycle). This response may be used as an

indication that the sensor is alive and well on the bus and is also called

the diagnostic response. If the sensor detects an ambient magnetic

field, it also responds with I_Sduring the low portion of the address

cycle. This response from the sensor is called the signal response.

When the next positive transition is detected, the sensor becomes

disabled, and its contribution to the bus signal current returns to I_Q.

The device may be addressed by modulating

the supply voltage as shown in Figure 1. A

preferred addressing protocol is as follows:

the bus supply voltage is brought down to 0V

so that all devices on the bus may be reset.

The voltage is then raised to the address

LOW voltage (V_L) and the bus quiescent

current is measured. The bus is then toggled

between V_Land V_H(address HIGH voltage),

with each positive transition representing an

increment in the bus address. After each

voltage transition, the bus current is moni-

tored to check for diagnostic and signal

responses from sensor ICs.

Bus Current

Figure 1 displays the above described addressing protocol. The top

trace represents the bus voltage transitions as controlled by the bus

driver (see applications note for an optimal bus driver schematic). The

second trace represents the bus current contribution of sensor (ad-

dress 02). The diagnostic response from the sensor indicates that it

detected its address on the bus; however, no signal response current

is returned, which indicates that sufficient magnetic field is not de-

tected at the chip surface. The third trace represents the current drain

of sensor 03 when a magnetic field is detected. Note both the diag-

nostic and signal response from the sensor. The last trace represents

Sensor Addressing

When a sensor detects a bus address equal

to its factory programmed address, it re-

FIGURE 1

BUS TIMING D1

DIAGNOSTIC

ADDRESS 01

DIAGNOSTIC

ADDRESS 02

DIAGNOSTIC

ADDRESS 03

DIAGNOSTIC

ADDRESS 04

DIAGNOSTIC

ADDRESS 01

ADDRESS

CLH

CHL

BUS

VOLTAGE

RESET

RST

phl

plh

SENSOR 02 —

DIAGNOSTIC CURRENT

SENSOR 02

CURRENT

WITH NO

MAGNETIC

FIELD

SENSOR 03 — DIAGNOSTIC

AND SIGNAL CURRENTS

SENSOR 03

CURRENT

WITH

MAGNETIC

FIELD

TOTAL

BUS CURRENT

WITH

MAGNETIC

FIELD AT

SENSOR 01

NOT PRESENT

SENSOR 01

NOT PRESENT

n • I

SENSOR 03

Dwg. WH-005

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

3055

MULTIPLEXED

TWO-WIRE HALL EFFECT

SENSOR IC

the overall bus current drain. When no

sensors are addressed, the net bus current

drain is the sum of quiescent currents of all

sensors on the bus (for ‘n’ sensors, the bus

quiescent current drain is n * I_Q).

APPLICATIONS NOTES

Magnetic Actuation

The left side of Figure 2 shows the wiring of the UGN3055U when

used as a magnetic threshold detector. Pin 1 of the sensor is wired to

the positive terminal of the bus, pin 2 is connected to the bus negative

terminal, and pin 3 has no connection.

Bus Issues

At present, a maximum of 30 active sensors

can coexist on the same bus, each with a

different address. Address 0 is reserved for

bus current calibration in software. This

feature allows for fail-safe detection of signal

current and eliminates detection problems

caused by low signal current (I_S), the opera-

tion of sensors at various ambient tempera-

tures, lot-to-lot variation of quiescent current,

and the addition and replacement of sensors

to the bus while in the field. Address 31 is

designed to be inactive to allow for further

address expansion of the bus (to 62 maxi-

mum addresses). In order to repeat the

address cycle, the bus must be reset as

shown in Figure 1 by bringing the supply

voltage to below V_RST. Sensors have been

designed not to ‘wrap-around’.

Mechanical Actuation

The right side of Figure 2 shows the wiring of the UGN3055U when

used to detect the status of a mechanical switch. In this case, pin 3 is

connected to the positive terminal of the switch. The negative side of

the switch is connected to the negative terminal of the bus. When the

mechanical switch is closed (shorted to ground) and the correct bus

address is detected by the IC, the sensor responds with a signal

current. If the switch is open, only a diagnostic current is returned.

FIGURE 2

SENSOR CONNECTIONS

POSITIVE BUS SUPPLY

Magnetic Sensing

The sensor IC has been designed to respond

to an external magnetic field whose magnetic

strength is greater than B_OP. It accomplishes

this by amplifying the output of an on-chip

Hall transducer and feeding it into a threshold

detector. In order that bus current is kept to

a minimum, the transducer and amplification

circuitry is kept powered down until the

sensor is addressed. Hence, the magnetic

status is evaluated only when the sensor is

addressed.

SWITCH

BUS RETURN

Dwg. EH-004

External Switch Sensing

The third pin of the IC (pin 3) may be used to

detect the status of an external switch when

magnetic field sensing is not desired (and in

the absence of a magnetic field). The

allowable states for the switch are ‘open’ and

‘closed’ (shorted to sensor ground).

3055

MULTIPLEXED

TWO-WIRE HALL EFFECT

SENSOR IC

FIGURE 3

BUS INTERCONNECTION

UGN3055U AND UGS3055U

(POSITIVE) BUS SUPPLY

ADDRESS

RESET

MULTIPLEXED TWO-WIRE HALL EF-

FECT SENSOR IC

ANALOG OUT

BUS RETURN

Dwg. EH-005

Bus Configuration

• The microprocessor can also be used to filter out random line noise

by digitally filtering the bus responses.

A maximum of 30 sensors may be connected

across the same two wire bus as shown in

Figure 3. It is recommended that the sensors

use a dedicated digital ground wire to mini-

mize the effects of changing ground potential

(as in the case of chassis ground in the

automotive industry).

• The microprocessor can easily keep track of the signal responses,

initiate the appropriate action; e.g., light a lamp, sound an alarm,

and also pinpoint the location of the signal.

Optimally, the microprocessor is used to control bus-driving circuitry

that will accept TTL level inputs to drive the bus and will return an

analog voltage representation of the bus current.

The bus was not designed to require two-wire

twisted-pair wiring to the sensors; however,

in areas of extreme EMI (electro-magnetic

interference), it may be advisable to install a

small bypass capacitor (0.01 µF for example)

between the supply and ground terminals of

each sensor instead of using the more

expensive wiring.

Interface Schematic

The bus driver is easily designed using a few operational amplifiers,

resistors, and transistors. Figure 4 shows a schematic of a recom-

mended bus driver circuit that is capable of providing 6 V to 9 V

transitions, resetting the bus, and providing an analog measurement of

the current for use by the A/D input of the microprocessor.

In Figure 4, the Address pin provides a TTL-compatible input that is

used to control the Bus supply. A HIGH (5 V) input switches Q1 ON

and sets the bus voltage to 6 V through the resistor divider R4, R5,

and the Zener Z1. A LOW input switches OFF Q2 and sets the bus

voltage to 9 V. This voltage is fed into the positive input of the opera-

tional amplifier OP1 and is buffered and made available at Bus Supply

(or sensor supply). Bus reset control is also available in the form of a

TTL-compatible input. When this input, which is marked Reset, is

HIGH, Q2 is switched ON and the positive input of the op amp is set to

the saturation voltage of the transistor (approximately 0 V). This resets

the bus.

Bus Driver

It is recommended that the bus be controlled

by microprocessor-based hardware for the

following reasons:

• Sensor address information may be stored

in ROM in the form of a look up table.

• Bus faults can be pinpointed by the

microprocessor by comparing the diagnos-

tic response to the expected response in

the ROM look up table.

A linear reading of the bus current is made possible by amplifying the

voltage generated across R6 (which is I_BUS* R6). The amplifier, OP2,

is a standard differential amplifier of gain R9/R7 (provided that R7 =

R8, R9 = R10). The gain of the total transimpedance amplifier is given

by:

• The microprocessor, along with an A/D

converter, can also be used to self cali-

brate the quiescent currents in the bus and

hence be able to easily detect a signal

response.

V_OUT= I_BUS* R6 * R9/R7

This voltage is available at the terminal marked Analog Out.

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

3055

MULTIPLEXED

TWO-WIRE HALL EFFECT

SENSOR IC

Bus Control Software

The processing of the bus current (available at Analog Out) is best

done by feeding it into the A/D input of a microprocessor. If the

flexibility provided by a microprocessor is not desired, this signal could

be fed into threshold detection circuitry; e.g., comparator, and the

output used to drive a display.

Related References

1. G. AVERY, “Two Terminal Hall. Sensor,” ASSIGNEE: Sprague

Electric Company, North Adams, MA, United States. Patent number

4,374,333; Feb. 1983.

2. T. WROBLEWSKI and F. MEISTERFIELD, “Switch Status

Monitoring System, Single Wire Bus, Smart Sensor Arrangement

There Of,” ASSIGNEE: Chrysler Motor Corporation, Highland Park, Ml,

United States. Patent number 4,677,308; June 1987.

FIGURE 4

BUS INTERFACE SCHEMATIC

+15 V

1 kΩ

10 kΩ R ₄

1 kΩ

Q₃

9 V

Z ₁

0.001

µF

OP₁

BUS SUPPLY

20 kΩ

R ₅

50 Ω

R ₆

ADDRESS

RESET

5 kΩ

Q₂

Q₁

5 kΩ

50 kΩ

R ₈

50 kΩ

R₇

SWITCH

BUS RETURN

100 kΩ

R ₉

ANALOG OUT

OP₂

100 kΩ

R₁₀

Dwg. EH-003A

3055

MULTIPLEXED

TWO-WIRE HALL EFFECT

SENSOR IC

Dimensions in Inches

(controlling dimensions)

Dimensions in Millimeters

(for reference only)

0.183

0.178

4.65

4.52

0.063

0.059

1.60

1.50

0.181

0.176

4.60

4.47

45°

0.018

0.46

0.086

MAX

2.18

MAX

0.015

0.38

0.560

14.22

MIN

0.016

0.41

SEE NOTE

0.050

0.100

1.27

2.54

Dwg. MH-003C in

Dwg. MH-003C mm

NOTES: 1. Tolerances on package height and width represent allowable mold offsets. Dimensions given are measured at the widest point (parting

line).

2. Exact body and lead configuration at vendor’s option within limits shown.

3. Height does not include mold gate flash.

4. Recommended minimum PWB hole diameter to clear transition area is 0.035” (0.89 mm).

5. Where no tolerance is specified, dimension is nominal.

6. Minimum lead length was 0.500” (12.70 mm). If existing product to the original specifications is not acceptable, contact sales office before

ordering.

Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the

detail specifications as may be required to permit improvements in the design of its products.

The information included herein is believed to be accurate and reliable. However, Allegro

MicroSystems, Inc. assumes no responsibility for its use; nor for any infringements of patents or other

rights of third parties which may result from its use.

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

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3055产品参数

型号:	3055
生命周期：	Active
Reach Compliance Code：	unknown
HTS代码：	8541.40.20.00
风险等级：	5.64
颜色：	YELLOW
配置：	COMMON ANODE, 1 DIGIT WITH DECIMAL POINT
显示高度：	7.62 mm
最大正向电流：	0.02 A
功能数量：	1
光电设备类型：	SMART/NORMAL 7 SEG NUMERIC LED DISPLAY
Base Number Matches：	1

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产品型号3055的概述

产品型号3055的Datasheet PDF文件预览

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