Description

technology with a hot-swap controller resulting in a more

efficient integrated controller for 12 V applications. By

power path are reduced.

When the ACS761 is externally enabled, and the voltage rail is

above the internal UVLO threshold, the internal charge pump

drives the gate of the external FET. When the load voltage

is detected, the gate is disabled while simultaneously alerting

the application that a fault has occurred.

The integrated protection in the ACS761 incorporates three

levels of fault protection, which includes a Power Fault with

user-selectable delay, an Overcurrent Fault threshold with user-

selectable delay, and Short Circuit protection, which disables

the gate in less than 2 μs. These faults are indicated to the

host system via the Fault pin and are cleared upon reasserting

enable high.

761ELF20B-DS, Rev. 5

Features and Benefits

▪ Hall-effect current monitor—no external sense resistor required

▪ Analog output voltage (factory trimmed for gain and offset)

proportional to applied current

▪ External high-side FET gate drive

▪ 240V*A power fault protection with user-selectable delay

▪ Overcurrent fault protection with user-selectable delay

▪ Fault protection isolates failed supply from output in < 2 μs

▪ 1.5 mΩ internal conductor resistance

▪ Active low latched Fault indicator output signal

▪ User controlled soft start / hot-swap function

▪ Logic enable input pin

▪ 10.8 to 13.2 V, single-supply operation

▪ 2 kV ESD protection for all pins

12 V High-Side Hot-Swap Hall Effect Based Current Monitor IC

Package: 24 pin QSOP (suffix LF)

Typical Application

Approximate Scale

ACS761ELF-20B

IP–

IP–

IP–

IP–

IP–

IP–

GATE

GND

PGOOD

FB+

PGOOD

FAULT

1

2

3

4

5

6

7

8

9

10

11

12

IP+

IP+

IP+

IP+

IP+

IP+

EN

VIOUT

NC

CG

OCDLY

OPDLY

24

23

22

21

20

19

18

17

16

15

14

13

ACS761

S1

100 kΩ

100 kΩ

100

kΩ

3.3 V

Enable