1

Features

Gate

Driver

Latch

Control

Logic

OUT

SENSE+

SENSEÐ

CLI

Gnd

FLAG

CTRL

s

µP Compatible Inputs

s

Adjustable Current Limit

Thresholds

s

External Sense Resistor

s

Flag Signal to Indicate

Output Status

Package Options

8L PDIP & SO Narrow

IGBT Ignition Predriver

with Dynamic Current Regulation

1

FLAG

SENSE+

SENSEÐ

Gnd

CTRL

CLI

OUT

Description

Block Diagram

Absolute Maximum Ratings

The CS8312 is a bipolar micropro-

cessor interface IC designed to

drive an IGBT (or logic level

MOSFETs) powering large induc-

tive loads in harsh operating envi-

ronments. The ICÕs dynamic cur-

rent limit function lets the micro-

processor adjust the current limit

threshold to the real time needs of

the system.

CLI, the current limit input, sets the

current limit for the IGBT high or

low as directed by the system

microprocessor. CLI also raises and

lowers the threshold on the diag-

nostic FLAG output signal. The

FLAG output signals the micropro-

cessor when the current level

approaches current limit on the

IGBT. The CTRL input enables the

FLAG function.

CS8312

Supply Voltage.................................................................................-0.3V to +12V

Digital Input Currents....................................................................................2mA

Junction Temperature Range.....................................................-40¡C to +150¡C

Storage Temperature Range ......................................................-55¡C to +165¡C

Lead Temperature Soldering

Wave Solder(through hole styles only).............10 sec. max, 260¡C peak

Reflow (SMD styles only).............60 sec. max above 183¡C, 230¡C peak

Electrostatic Discharge (Human Body Model) ............................................2kV

A

Company

¨

Rev. 4/7/97

Cherry Semiconductor Corporation

2000 South County Trail, East Greenwich, RI 02818

Tel: (401)885-3600 Fax: (401)885-5786

Email: info@cherry-semi.com

Web Site: www.cherry-semi.com