A2557KLBTR-T

更新时间： 2024-11-07 13:05:15

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器
页数	文件大小	规格书
12页	177K
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A2557KLBTR-T 数据手册

2557

PROTECTED QUAD LOW-SIDE DRIVER

WITH FAULT DETECTION & SLEEP MODE

The A2557xB, A2557xEB, and A2557xLB have been specifically

designed to provide cost-effective solutions to relay-driving applications with

up to 300 mA drive current per channel. They may also be used for driving

incandescent lamps in applications where turn-on time is not a concern. Each

of the four outputs will sink 300 mA in the on state. The outputs have a

minimum breakdown voltage of 60 V and a sustaining voltage of 40 V. A

low-power Sleep Mode is activated with either ENABLE low or all inputs

low. In this mode, the supply current drops to below 100 µA.

Over-current protection for each channel has been designed into these

devices and is activated at a nominal 500 mA. It protects each output from

short circuits with supply voltages up to 32 V. When an output experiences a

short circuit, the output current is limited at the 500 mA current clamp. In

addition, foldback circuitry decreases the current limit if an excessive voltage

is present across the output and assists in keeping the device within its SOA

(safe operating area). An exclusive-OR circuit compares the input and output

state of each driver. If either a short or open load condition is detected, a

single FAULT output is turned on (active low). Similar devices, for operation

to 1.3 A, are available as the UDx2547B/EB.

A2557xLB

OUT

ENABLE

GROUND

OUT

GROUND

OUT

FAULT

OUT

Continuous or multiple overload conditions causing the channel tempera-

ture to reach approximately 165°C will result in an additional linear decrease

in the output current of the affected driver. If the fault condition is corrected,

the output stage will return to its normal saturated condition.

Dwg. PP-017-4

Note that the A2557xB (DIP) and the A2557xLB

(SOIC) are electrically identical and share a

common terminal number assignment.

The first character of the part number suffix determines the device

operating temperature range. Suffix ‘S-’ is the standard -20°C to +85°C;

suffix ‘E-’ is -40°C to +85°C; suffix ‘K-’ is for the industrial temperature

range of -40°C to +125°C. Package suffix ‘-B’ devices are 16-pin power

DIPs; suffix ‘-EB’ devices are 28-lead power PLCCs; and suffix ‘-LB’ are 16-

lead power wide-body SOICs for surface-mount applications. All packages

are of batwing construction to provide for maximum package power dissipa-

tion.

ABSOLUTE MAXIMUM RATINGS

Output Voltage, V_O.............................. 60 V

Over-Current Protected Output Voltage,

V_O..................................................... 32 V

Output Current, I_O......................... 500 mA*

FAULT Output Voltage, V_FLT............. 60 V

Logic Supply Voltage, V_CC................. 7.0 V

Input Voltage, V_Ior V_OE..................... 7.0 V

Package Power Dissipation,

P_D........................................... See Graph

Operating Temperature Range, T_A

Suffix ‘S-’ ...................... -20°C to +85°C

Suffix ‘E-’ ...................... -40°C to +85°C

Suffix ‘K-’ ................... -40°C to +125°C

Junction Temperature,

FEATURES

I 300 mA Output Current per Channel

I Independent Over-Current Protection &Thermal Limiting for Each Driver

I Output Voltage to 60 V

I Output SOA Protection

I Fault-Detection Circuitry for Open or Shorted Load

I Low Quiescent Current Sleep Mode

I Integral Output Flyback/Clamp Diodes

I TTL- and 5 V CMOS-Compatible Inputs

T_J............................................... +150°C*

Storage Temperature Range,

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

*Outputs are current limited at approximately

500 mA per driver and junction temperature

limited if higher current is attempted.

Complete part number includes a suffix to identify operating temperature

range (E-, K-, or S-) and package type (-B, -EB, or -LB). Always order by

complete part number, e.g., A2557KLB .

12 3 4 5 6 7...12

中文翻译

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A2557KLBTR-T 替代型号

型号	品牌	替代类型	描述	数据表
A2557ELBTR-T	ALLEGRO	完全替代	Buffer/Inverter Based Peripheral Driver, 4 Driver, 0.5A, BIPolar, PDSO16, LEAD FREE, MS-01
A2557KLBTR	ALLEGRO	完全替代	暂无描述
A2557ELB-T	ALLEGRO	完全替代	PROTECTED QUAD LOW-SIDE DRIVER WITH FAULT DETECTION and SLEEP MODE

与A2557KLBTR-T相关器件

型号	品牌	获取价格	描述	数据表
A2557SB	ALLEGRO	获取价格	PROTECTED QUAD LOW-SIDE DRIVER WITH FAULT DETECTION & SLEEP MODE
A2557SB-T	ALLEGRO	获取价格	PROTECTED QUAD LOW-SIDE DRIVER WITH FAULT DETECTION and SLEEP MODE
A2557SEB	ALLEGRO	获取价格	PROTECTED QUAD LOW-SIDE DRIVER WITH FAULT DETECTION & SLEEP MODE
A2557SEB-T	ALLEGRO	获取价格	PROTECTED QUAD LOW-SIDE DRIVER WITH FAULT DETECTION and SLEEP MODE
A2557SEBTR	ALLEGRO	获取价格	And Gate Based Peripheral Driver, 0.5A, PQCC28, PLASTIC, MS-018AB, LCC-28
A2557SEBTR-T	ALLEGRO	获取价格	Buffer/Inverter Based Peripheral Driver, 4 Driver, 0.5A, BIPolar, PQCC28, LEAD FREE, PLAST
A2557SLB	ALLEGRO	获取价格	PROTECTED QUAD LOW-SIDE DRIVER WITH FAULT DETECTION & SLEEP MODE
A2557SLB-T	ALLEGRO	获取价格	PROTECTED QUAD LOW-SIDE DRIVER WITH FAULT DETECTION and SLEEP MODE
A2557SLBTR	ALLEGRO	获取价格	暂无描述
A2557SLBTR-T	ALLEGRO	获取价格	暂无描述

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