
1
Features
Gate
Driver
Latch
V
REF
Control
Logic
V
CC
OUT
SENSE+
SENSED
CLI
Gnd
FLAG
CTRL
V
T
V
T
I
I
μP Compatible Inputs
Adjustable Current Limit
Thresholds
External Sense Resistor
Flag Signal to Indicate
Output Status
I
I
Package Options
8L PDIP & SO Narrow
C
IGBT Ignition Predriver
with Dynamic Current Regulation
Description
1
FLAG
SENSE+
SENSED
Gnd
V
CC
CTRL
CLI
OUT
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 ICs 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
Internal Power Dissipation (T
A
= 25C) .................................................700mW
Junction Temperature Range.....................................................-40C to +150C
Storage Temperature Range ......................................................-55C to +165C
Lead Temperature Soldering
Wave Solder(through hole styles only).............10 sec. max, 260C peak
Reflow (SMD styles only).............60 sec. max above 183C, 230C 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