Datasheet CS1107EDFR8 Datasheet (Cherry Semiconductor)

Features

■ Fault Detection

Open Circuit

Short Circuit

Overtemperature

■ On-Chip Flyback

Protection

■ Low Standby Current

Package Options

CS1107

Single Relay Driver IC

CS1107

Description

This ASIC provides up to 350mA of
drive current for driving a relay.
On-chip diagnostic features include
open and short circuit detection in
the on state, duty cycle current limit
control, and thermal shutdown.
Faults are reported on the

lead. is an active-low output.
An on-chip zener provides protec­tion from flyback pulses from the
relay. Internal pull-down circuitry
is provided to ensure the output
pin turns off when the Control pin
is floating.

Fault

Fault

Block Diagram

Absolute Maximum Ratings

Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65ûC to 150ûC

V

CC

, , Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to 6V

ESD Capability (Human Body Model). . . . . . . . . . . . . . . . . . . . . . . . . . . 2kV

Peak Transient Voltage (output off mode, output pin only)

(26V load Dump @ 14V V

BAT

) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40V

Lead Temperature Soldering

Reflow (SMD styles only) . . . . 60 sec. max above 183¡C, 230¡C peak

Fault

Output

V

CC

Gnd

Gnd

Control

Gnd

Gnd

Fault

8 Lead SO

(internally fused leads)

1

A Company

¨

Rev. 1/29/99

Cherry Semiconductor Corporation

2000 South County Trail, East Greenwich, RI 02818

Tel: [phone] Fax: [phone]

Email: [e-mail]

Web Site: www.cherry-semi.com

V

CC

I

Control

SOURCE

Drive

33V

& Bias

Output

Fault

Gnd

Gnd Gnd Gnd

Duty cycle

during

short circuit

Overtemp
Shutdown

+

short circuit

-

detect

­open circuit
detect

+

1

Electrical Characteristics: 4.75V ² VCC² 5.25V, -40ûC ² TA² 85ûC, -40¡C ² TJ² 150¡C

CS1107

2

Package Pin Description

PACKAGE PIN # PIN SYMBOL FUNCTION

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

8 Lead SO

(Internally Fused Leads)

1 Output Open collector output.

2V

CC

5V regulated supply input.

3 Open collector diagnostic output low during open

load, short circuit and overtemperature conditions.

4 Control TTL compatible input. A high on this pin turns the

output on.

5, 6, 7, 8 Ground Signal ground.

Fault

■ Supply Requirements

V

CC

Quiescent Current Output ON 3 6 mA

VCCQuiescent Current Output OFF 70 250 µA

■ Output

Leakage Current V

BAT

=14V 0 100 µA

Saturation Voltage I

OUTPUT

= 350mA 1.1 1.5 V

I

OUTPUT

= 180mA 0.9 1.3 V

V

CLAMP

VCC< 4.5V, I

OUTPUT

= 180mA 29 33 36 V

■ Current Sense

Short Circuit Current 350 500 650 mA
Open Circuit Current Output in the ON state 20 40 60 mA

■ Control - Input

Input Voltage Logic = High 2.0 V

Logic = Low 0.8 V

Input Current Control = V

CC

40 80 µA

■ Fault Output - (Open Collector)

Output Low Voltage I

FAULT

= 250µA (sink) 0.24 0.40 V

■ Overtemperature Shutdown

TJOutput Disable Threshold (Guaranteed by Design) 150 180 ûC
TJHysteresis (Guaranteed by Design) 5 ûC

CS1107

3

Applications Diagram

Circuit Description

The CS1107 relay driver IC provides up to 350mA of drive
current in a low-side configuration. The Output driver pin
is controlled through the TTL compatible Control input
pin. A high condition on the Control pin turns the output
pin on.

The pin reports short circuit, open circuit, and
overtemperature conditions on the IC. If a fault is present,
the open collector output pin will be low. Typical
numbers for faults are: exceeding 500mA of drive current
will report a short circuit. Less than 40mA (typical) will
report an open circuit. A temperature fault will be reported
when the die temperature exceeds 180¡C (typical). Faults

are only reported when the Control pin is high, due to the
low quiescent current when the Control pin is low and the
output device is turned off.

Overcurrent protection is provided by duty cycle control.
When the Output current exceeds the current limit thresh­old, the output enters duty cycle mode to reduce power
dissipation of the IC to a safe level. The higher the thresh­old is exceeded the lower the duty cycle becomes.

A 33V on-chip zener diode on the Output pin protects the
device from flyback pulses when a relay is turned off. The
saturation voltage of this pin will not exceed 1.5V at
350mA.

Fault

Fault

C

MODULE(ESD)

10nF

20k

Output

Gnd

CS1107

V

CC

Fault

Gnd

Gnd

VBAT

V

CC

microprocessor

Control

Gnd

Thermal Data 8 Lead SO

(internally fused leads)

R

QJC

typ 25 ûC/W

R

QJA

typ 110 ûC/W

4

Rev. 1/29/99 © 1999 Cherry Semiconductor Corporation

Package Specification

PACKAGE DIMENSIONS IN mm (INCHES)

D

Lead Count Metric English

Max Min Max Min

8 Lead SO 5.00 4.80 .197 .189

PACKAGE THERMAL DATA

CS1107

Ordering Information

Part Number Description

CS1107EDF8 8 Lead SO

(internally fused leads)

CS1107EDFR8 8 Lead SO

(internally fused leads)
(tape & reel)

Cherry Semiconductor Corporation reserves the right to
make changes to the specifications without notice. Please
contact Cherry Semiconductor Corporation for the latest
available information.

Surface Mount Narrow Body (D); 150 mil wide

1.27 (.050) BSC

0.51 (.020)

0.33 (.013)

6.20 (.244)

5.80 (.228)

4.00 (.157)

3.80 (.150)

1.57 (.062)

1.37 (.054)

D

0.25 (0.10)

0.10 (.004)

1.75 (.069) MAX

1.27 (.050)

0.40 (.016)

REF: JEDEC MS-012

0.25 (.010)

0.19 (.008)