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1
Features
COIL +
Q
1
COIL -
V
SS
ENABLE1
ENABLE2
DIRECTION
Gnd
DRIVE
CONTROL
LOGIC
OUTPUT
DRIVER
D
+
OUTPUT
DRIVER
Overvoltage
Protection
Transient
Protection
V
REF
Over
Current
Protection
Q
3
Q
4
Q
2
Over
Current
Protection
I
High Current (2A typ)
Output
TTL compatible
DIRECTION Control
Fault Protection
Overvoltage
Load Dump Protection to
74V
I
I
Package Options
7 Lead Power SIP
C
2A H-Bridge Driver
Description
Block Diagram
The CS3720 is high current (2A typ)
bidirectional DC motor driver. The
H-bridge output stage consists of
two pairs of power NPN transis-
tors, each with a V
SAT
=2.3V at
I
OUT
=2A (typ).
The three TTL compatible inputs,
ENABLE1, ENABLE2, and DIREC-
TION control the output stage.
When ENABLE1 is low and
ENABLE2 is high, DIRECTION
determines which way current
flows through the motor coil. Any
other combination of ENABLE set-
tings disables the outputs.
The CS3720 is protected against
overvoltage fault conditions. If a
fault condition is detected, the IC
shuts down.
CS3720
2
4
6
8
10
12
14
ENABLE1
DIRECTION
COIL+
Gnd
COILD
V
SS
ENABLE2
Absolute Maximum Ratings
DC Input Voltage..................................................................................-0.3 to 28V
Transient Input Voltage ...................................................................... -0.3 to 74V
Internal Power Dissipation......................................................Internally limited
Junction Temperature Range.....................................................-40C to +150C
Storage Temperature Range.......................................................-65C to +150C
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
1
7 Lead TO-220
7 Lead D
2
PAK
1
1
2
3
4
5
6
7
ENABLE1
DIRECTION
COIL+
Gnd
V
SS
COILD
ENABLE2
Rev. 5/4/99
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
A
Company
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