Cherry Semiconductor CS3720XVA17, CS3720XTHA7, CS3720XT7, CS3720XM7, CS3720XDPSR7 Datasheet

1

Features

COIL +

Q

1

COIL -

V

SS

ENABLE1

ENABLE2

DIRECTION

Gnd

DRIVE

CONTROL

LOGIC

OUTPUT

DRIVER

Ð

OUTPUT

DRIVER

+

OUTPUT

DRIVER

+

Overvoltage

Protection

Transient

Protection

V

REF

Over

Current

Protection

Q

3

Q

4

Q

2

Over

Current

Protection

■ High Current (2A typ)

Output

■ TTL compatible

DIRECTION Control

■ Fault Protection

Overvoltage
Load Dump Protection to

74V

Package Options

7 Lead Power SIP

CS3720

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 transis­tors, each with a V

SAT

=2.3V at

I

OUT

=2A (typ).

The three TTL compatible inputs,
ENABLE1, ENABLE2, and DIREC­TION 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 set­tings disables the outputs.

The CS3720 is protected against
overvoltage fault conditions. If a
fault condition is detected, the IC
shuts down.

CS3720

2 ENABLE1
4 DIRECTION
6 COIL+
8 Gnd
10 COILÐ
12 V

SS

14 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 .....................................................-40¡C to +150¡C

Storage Temperature Range.......................................................-65¡C to +150¡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

1

7 Lead TO-220

7 Lead D

2

PAK

1

1 ENABLE1
2 DIRECTION
3 COIL+
4 Gnd
5V

SS

6 COILÐ
7 ENABLE2

Rev. 5/4/99

Cherry Semiconductor Corporation

2000 South County Trail, East Greenwich, RI 02818

Tel: [phone] Fax: [phone]

Email: [e-mail]

Web Site: www.cherry-semi.com

A Company

¨

2

Current flow through the two outputs COIL+ and COIL­is controlled by the combined settings of ENABLE1,
ENABLE2 and DIRECTION (Table 1). The outputs will be
active only when ENABLE1 is low and ENABLE2 is high.
When DIRECTION is high, current flows out of COIL+
and into COIL-. When DIRECTION is low, current flows
out of COIL- and into COIL+. For any other combination
of ENABLE settings, the outputs are off.

Table 1. Logical Control Diagram

ENABLE1 ENABLE2 DIRECTION COIL+ COIL-

Low High High High Low

Low High Low Low High

High X X OFF OFF

X Low X OFF OFF

Motor Direction Control

Electrical Characteristics: 5.5V ² V

CC

² 17V; Ð40¡C ² TJ ² +150¡C; Ð40¡C ² TC ² +105¡C; Ð40¡C ² TA² 105¡C; unless otherwise specified.

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

CS3720

Package Lead Description

PACKAGE LEAD# LEAD SYMBOL FUNCTION

Application Hints

15 Lead 7 Lead 7 Lead

Power SIP TO-220 D2PAK

2 1 1 ENABLE1 Enables output when held low and ENABLE 2 = High

4 2 2 DIRECTION Determines the direction of current flow through COIL+ and

COIL- as long as ENABLE1 = Low and ENABLE2 = High

6 3 3 COIL+ Positive Output of H bridge to coil

8 4 4 Gnd Ground connection

12 5 5 V

SS

Supply voltage for IC

10 6 6 COIL- Negative Output of H bridge to coil

14 7 7 ENABLE2 Enables output when held high and ENABLE 1 = Low

■ Output Stage

Quiescent Current I

OUT

=0mA; 10 mA
ENABLE1=DIRECTION= High
ENABLE2=Low

Output Saturation Voltage I

OUT

=2A 3.2 V
I

OUT

=500mA 2.6 V

Output Leakage Current I

OUT

=0mA 20 µA

Current Limit 3.0 A

■ Logic Control Functions

High Level Input Voltage 2.0 V

Low Level Input Voltage 0.8 V

High Level Input Current 10 µA

Low Level Input Current -250 µA

Turn on Delay R

LOAD

=30½; Coil=5mH; 50 µs

Guaranteed by design C

LOAD

=15pF 5

Turn off Delay R

LOAD

=30½; Coil=5mH; 50 µs

Guaranteed by design C

LOAD

=15pF 5

■ Fault Protection Functions

Overvoltage Shutdown I

OUT

= 500mA 18.0 21.5 V