Cherry Semiconductor CS3750ENF16 Datasheet

1

Features

OUT1A

Thermal

Shutdown

V

REF

Overvoltage

1/2 H -Bridge

Driver

with Current

Limit

RC Filter

for PWM Input

OUT1B C1

1/2 H -Bridge

Driver

with Current

Limit

DIRECTION

Control

1/2 H- Bridge

Driver

with Current

Limit

RC Filter

for PWM Input

1/2 H- Bridge

Driver

with Current

Limit

DIRECTION

Control

OUT2A OUT2B C2

Gnd

IN2DIR2IN1DIR1V

S1,2

■ 2 Independent NPN

H-Bridge Drivers

■ No Analog Trim Required

■ Used in Multiplexed

Systems

■ Quiet Gauge Operation

■ Programmable Slew

Rate Minimizes
Switching Noise

■ Fault Protection

Over Voltage

Thermal Shutdown

Short Circuit

Package Options

16 Lead PDIP

(internally fused leads)

CS3750

100mA Dual H-Bridge Air-Core

Gauge Driver

1

DIR1

C1

IN1

Gnd

Gnd

OUT1A

VS1

OUT1B

DIR2

C2

IN2

Gnd

Gnd

OUT2A

VS2

OUT2B

Description

Block Diagram

Absolute Maximum Ratings

The CS3750 is a dual H-bridge four
quadrant air-core gauge driver. The IC
provides all the functions necessary to
drive a tachometer or speedometer as
part of a microprocessor based multi­plexed system. Digital input control
eliminates the need for any analog cali­bration of the gauge.

The controlling microprocessor sends
out a PWM signal to each H bridge
driver input (IN1, IN2). The PWM sig­nal duty cycle is proportional to the
HÐbridge output. Output current

(100mA max) direction is controlled by
the DIRECTION input. PWM switch­ing noise is minimized at each half
bridge by an internal RC filter and
external programmable capacitor.

The CS3750 is protected against 50V
load dump, over voltage and thermal
runaway fault conditions. Any of these
faults causes the IC to shut down. Each
high side of the output driver is current
limited. A short circuit condition in one
driver does not affect the others.

CS3750

Supply Voltage .................................................................................7.5V to +16V

Internal Power Dissipation.....................................................Internally limited

Logic Input Voltages.......................................................................Ð0.3V to 6.5V

Junction Temperature Range ...................................................Ð40¡C to +150¡C

Storage Temperature Range.....................................................Ð55¡C to +165¡C

Lead Temperature Soldering

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

Electrostatic Discharge (Human Body Model)............................................8kV

Rev. 7/20/95

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

Electrical Characteristics: 7.5V <= VCC<=15V; -40¡C ² TA² +85¡C unless otherwise specified.

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

CS3750

Note 1: Time required for output signal to rise to 90% of its amplitude after input signal switches.
Note 2: Time required for output signal to decrease to 10% of its amplitude after input signal switches.

■ Output Stage

V

OUT

Saturation Voltage I

OUT

=100mA; VIN=0V 0.25 0.50 V

(Low Side) I

OUT

=1mA; VIN=0V 0.01 0.10 V

V

OUT

Offset Voltage VC=5V; I

OUT

=-30mA 15 50 mV

V

OUT

Saturation High Side VIN=5V;I

OUT

=-100mA VS-2 VS-1.5 VS V

Low Side VIN=0V;I

OUT

=-1mA 0.02 0.10 V

V

OUT

Differential VC=5V, I

OUT

=-100mA 100 mV
Matching Voltage
Supply Current VIN=V

DIR

=0; 23 45 mA

■ Input Stage

VINLOW VINdecreasing; V

DIR

=0V 0.8 1.9 V

HIGH V

IN

increasing; V

DIR

=0V 2.0 3.5 V

Hysteresis V

DIR

=0V 100 mV

IINLOW VIN=0.8V; V

DIR

=0V 20 100 µA

HIGH VIN=3.5V 0.4 100.0 µA

Output Slew Rate VIN=250Hz; R

LOAD

=150½ 0.2 0.8 V/us

with respect to input

Output Turn on Delay VIN=250Hz; R

LOAD

=150½, note 1 1.5 6 µs

with respect to input

Output Turn off Delay VIN=250Hz; R

LOAD

=150½, note 2 2.4 9 µs

with respect to input

■ Direction

V

DIR

LOW VIN=5V; V

DIR

decreasing 0.8 1.9 V

HIGH VIN=5V; V

DIR

increasing 2.0 3.5 V

Hysteresis VIN=5V 100 mV

I

DIR

LOW VIN=0V; V

DIR

=0.8V 40 100 µA

HIGH VIN=0V; V

DIR

=3.5V 0.4 100 µA

Output Slew Rate VIN=5V; f

DIR

=250Hz; C=0µF 0.2 1.5 V/µs

with respect to DIR

Output Fall Time VIN=0V; V

DIR

=0V; C=0µF 0.2 2.0 µs

with respect to DIR

Output Turn on Delay VIN=5V; R

LOAD

=150½

with respect to DIR V

DIR

=250Hz; C=0µF, note 1 1 6 µs

Output Turn off Delay VIN=5V; R

LOAD

=150½

with respect to DIR V

DIR

=250Hz; C=0µF, note 2 2.5 9 µs

■ Protection Functions

I

OUT

Current Limit VIN=5V 100 225 mA

(High Side Only)

Over Voltage Threshold VIN=5V 17.0 21.5 26.0 V

Hysteresis 0.5 V

Thermal Shutdown 160 ¡C

Hysteresis 20 ¡C