ACPL-5160 datasheet(3/36 Pages) BOARDCOM

Part #	ACPL-5160

Description	2.5-Amp Gate Drive Optocoupler with Integrated (VCE) Desaturation Detection and Fault Status Feedback

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Manufacturer	BOARDCOM [Broadcom Corporation.]

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ACPL-5160 and ACPL-5161

Data Sheet

Product Overview Description

The ACPL-516x is a highly integrated power control device that

incorporates all the necessary components for a complete,

isolated IGBT gate drive circuit with fault protection and

feedback into one rugged, hermetically sealed package. TTL

input logic levels allow direct interface with a microcontroller,

and an optically isolated power output stage drives IGBTs with

power ratings of up to 150A and 1200V. A high-speed internal

optical link minimizes the propagation delays between the

microcontroller and the IGBT while allowing the two systems to

operate at very large common mode voltage differences that

are common in industrial motor drives and other power

switching applications. An output IC provides local protection

for the IGBT to prevent damage during overcurrents, and a

second optical link provides a fully isolated fault status

feedback signal for the microcontroller. A built-in watchdog

circuit monitors the power stage supply voltage to prevent

IGBT damage caused by insufficient gate drive voltages. This

integrated IGBT gate driver is designed to increase the

performance and reliability of a motor drive without the cost,

size, and complexity of a discrete design.

Two light emitting diodes and two integrated circuits housed

in the same 16-pin ceramic package provide the input control

circuitry, the output power stage, and two optical channels.

The input buffer IC is designed on a bipolar process, while the

output detector IC is manufactured on a high voltage

BiCMOS/Power DMOS process. The forward optical signal path,

as indicated by LED1, transmits the gate control signal. The

return optical signal path, as indicated by LED2, transmits the

fault status feedback signal. Both optical channels are

completely controlled by the input and output ICs,

respectively, making the internal isolation boundary

transparent to the microcontroller.

Under normal operation, the input gate control signal directly

controls the IGBT gate through the isolated output detector IC.

LED2 remains off and a fault latch in the input buffer IC is

disabled. When an IGBT fault is detected, the output detector

IC immediately begins a soft shutdown sequence, reducing the

IGBT current to zero in a controlled manner to avoid potential

IGBT damage from inductive overvoltages. Simultaneously, this

fault status is transmitted back to the input buffer IC via LED2,

where the fault latch disables the gate control input and the

active low fault output alerts the microcontroller.

During powerup, the Undervoltage Lockout (UVLO) feature

prevents the application of insufficient gate voltage to the

IGBT, by forcing the ACPL-516x’s output low. Once the output is

in the high state, the DESAT (VCE) detection feature of the

ACPL-516x provides IGBT protection. Thus, UVLO and DESAT

work in conjunction to provide constant IGBT protection.

Figure 2 Functional Diagram

SHIELD

DESAT

FAULT

UVLO

OUTPUT IC

SHIELD

INPUT IC

RESET

5

FAULT

6

VIN+

1

VIN-

2

VCC1

3

VCC2

13

12

VOUT

11

VEE

9,10

VE

16

DESAT

14

VC

VLED2+

GND1

15

4

VLED1-

7

8

VLED1+

LED2

LED1

D

R

I

V

E

R

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ACPL-5160 Datasheet(PDF) 3 Page - Broadcom Corporation.

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