CS8312
CS8312
IGBT Ignition Predriver
with Dynamic Current Regulation
Description
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.
Features
s
µP Compatible Inputs
s
Adjustable Current Limit
Thresholds
s
External Sense Resistor
s
Flag Signal to Indicate
Output Status
Absolute Maximum Ratings
Supply Voltage.................................................................................-0.3V to +12V
Digital Input Currents....................................................................................2mA
Internal Power Dissipation (T
A
= 25¡C) .................................................700mW
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
Package Options
8L PDIP & SO Narrow
FLAG
1
SENSE+
V
CC
CTRL
CLI
OUT
Block Diagram
V
CC
CTRL
V
T
Control
Logic
Gate
Driver
OUT
SENSEÐ
Gnd
FLAG
Latch
V
T
SENSE+
V
REF
Gnd
CLI
SENSEÐ
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
Rev. 4/7/97
1
A
¨
Company
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
