ACS760ELFTR-20B-T(2013) データシートの表示（PDF） - Allegro MicroSystems

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ACS760ELFTR-20B-T
(Rev.:2013)

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

Allegro MicroSystems 

ACS760ELF-20B 12 V High-Side Hot-Swap Hall Effect Based Current Monitor IC

Pin-out Diagram

IP+ 1

IP+ 2

IP+ 3

IP+ 4

IP+ 5

IP+ 6

EN 7

VIOUT 8

ISET 9

CG 10

OCDLY 11

OPDLY 12

24 IP–

23 IP–

22 IP–

21 IP–

20 IP–

19 IP–

18 GATE

17 GND

16 FB–

15 FB+

14 S1SHORT

13 FAULT

Terminal List Table

Number

1-6

7

8

9

10

11

12

13

14

15

16

17

18

19-24

Name

IP+

EN

VIOUT

ISET

CG

OCDLY

OPDLY

¯F¯ ¯A ¯U ¯¯L¯ ¯T¯

S1SHORT

FB+

FB-

GND

GATE

IP–

Function

Primary sampled current conduction path input; power input pins: connected to VCC

Enable pin. Toggling this pin to the low state after a FAULT condition resets the ACS760.

Analog current level output. Output voltage on this pin is proportional to the current flowing from the IP+

pins to the IP– pins.

Terminal for RSET resistor. Sets Fault Current Threshold, IPF, via external resistor, RSET, connected between

this terminal and GND. Factory trimmed 100 μA current source flows out of this pin.

Terminal for CG capacitor. May be used to adjust the turn-on time and soft start control of an external

MOSFET, S1. Voltage on this pin limits inrush current through MOSFET S1. Set via external capacitance,

CG, connected between this pin and GND. This capacitor is charged by an internal 20 μA current source.

Terminal for external capacitor, COCD, Used to adjust delay for overcurrent shutdown, set via the external

capacitor, COCD, connected between this pin and GND.

Terminal for external capacitor, COPD, Used to adjust delay for overpower shutdown, set via the external

capacitor, COPD, connected between this pin and GND.

Active low; output signal for short circuit and 240 V*A overload faults; does not trip for S1 short circuit fault.

Connect a 1 kΩ pull-up resistor between this pin and the 3.3 V rail.

Active low; output signal for MOSFET S1 failure. Connect a 1 kΩ pull-up resistor between this pin and the

3.3 V rail.

Input of positive feedback on output voltage. Used to determine 240 V*A threshold by difference between

FB+ and FB– pins.

Input of negative feedback on output voltage. Used to determine 240 V*A threshold by difference between

FB+ and FB– pins. Pulling the FB– pin to 3.3 V, and the OPDLY pin to GND, disables the 240 V*A power

fault, which allows the ACS760 to operate purely in Current Mode.

Terminal for ground connection.

Terminal for external MOSFET, S1. Provides output voltage to drive S1. Current through S1 is controlled at

start-up by external capacitance connected between the CG pin and GND.

Primary sampled current conduction path output; power output pins.

Allegro MicroSystems, LLC

3

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

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