CHERRY CS1107EDF8

CS1107
CS1107
Single Relay Driver IC
Features
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 Fault
lead. Fault 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 Detection
Open Circuit
Short Circuit
Overtemperature
■ On-Chip Flyback
Protection
■ Low Standby Current
Absolute Maximum Ratings
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65ûC to 150ûC
VCC, Fault , Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to 6V
ESD Capability (Human Body Model). . . . . . . . . . . . . . . . . . . . . . . . . . . 2kV
Peak Transient Voltage (output off mode, output pin only)
(26V load Dump @ 14V VBAT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40V
Lead Temperature Soldering
Reflow (SMD styles only) . . . . 60 sec. max above 183¡C, 230¡C peak
Block Diagram
VCC
ISOURCE
Control
Output
33V
Drive
& Bias
Package Options
Overtemp
Shutdown
8 Lead SO
(internally fused leads)
Duty cycle
during
short circuit
Output
VCC
+
-
Fault
+
Gnd
Gnd
Gnd
short circuit
detect
Gnd
Gnd
1
Gnd
Fault
Control
Gnd
open circuit
detect
Gnd
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885-3600 Fax: (401)885-5786
Email: [email protected]
Web Site: www.cherry-semi.com
Rev. 1/29/99
1
A
¨
Company
CS1107
Electrical Characteristics: 4.75V ² VCC ² 5.25V, -40ûC ² TA ² 85ûC, -40¡C ² TJ ² 150¡C
PARAMETER
■ Supply Requirements
VCC Quiescent Current
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Output ON
Output OFF
3
70
6
250
mA
µA
Saturation Voltage
VBAT =14V
I OUTPUT = 350mA
I OUTPUT = 180mA
0
1.1
0.9
100
1.5
1.3
µA
V
V
VCLAMP
VCC < 4.5V, I OUTPUT = 180mA
29
33
36
V
Output in the ON state
350
20
500
40
650
60
mA
mA
40
0.8
80
V
V
µA
0.24
0.40
V
VCC Quiescent Current
■ Output
Leakage Current
■ Current Sense
Short Circuit Current
Open Circuit Current
■ Control - Input
Input Voltage
Input Current
Logic = High
Logic = Low
Control = VCC
2.0
■ Fault Output - (Open Collector)
Output Low Voltage
I FAULT = 250µA (sink)
■ Overtemperature Shutdown
TJ Output Disable Threshold
TJ Hysteresis
(Guaranteed by Design)
(Guaranteed by Design)
150
5
180
ûC
ûC
Package Pin Description
PACKAGE PIN #
PIN SYMBOL
FUNCTION
8 Lead SO
(Internally Fused Leads)
1
Output
Open collector output.
2
VCC
3
Fault
5V regulated supply input.
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.
2
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 Fault pin reports short circuit, open circuit, and
overtemperature conditions on the IC. If a fault is present,
the open collector output Fault 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.
Applications Diagram
Output
CMODULE(ESD)
10nF
CS1107
VCC
Gnd
Fault
Gnd
Control
Gnd
20k
VBAT
Gnd
VCC
microprocessor
3
CS1107
Circuit Description
CS1107
Package Specification
PACKAGE DIMENSIONS IN mm (INCHES)
PACKAGE THERMAL DATA
D
Lead Count
8 Lead SO
Metric
Max
Min
5.00
4.80
Thermal Data
English
Max Min
.197
.189
RQJC
RQJA
typ
typ
8 Lead SO
(internally fused leads)
25
110
ûC/W
ûC/W
Surface Mount Narrow Body (D); 150 mil wide
4.00 (.157)
3.80 (.150)
6.20 (.244)
5.80 (.228)
0.51 (.020)
0.33 (.013)
1.27 (.050) BSC
1.75 (.069) MAX
1.57 (.062)
1.37 (.054)
1.27 (.050)
0.40 (.016)
0.25 (.010)
0.19 (.008)
D
0.25 (0.10)
0.10 (.004)
REF: JEDEC MS-012
Ordering Information
Part Number
CS1107EDF8
CS1107EDFR8
Rev. 1/29/99
Description
8 Lead SO
(internally fused leads)
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.
4
© 1999 Cherry Semiconductor Corporation