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Cherry Semiconductor Corporation

CS1108 Datasheet Preview

CS1108 Datasheet

Single Lamp Driver IC

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CS1108
Single Lamp Driver IC
Description
This ASIC provides up to 350mA of
drive current for powering bulbs.
The typical application for this part
is for use in airbag systems using a
type 194 bulb. On chip diagnostics
provide open circuit and short cir-
cuit detection in the output on
mode. In addition, the output
driver will turn on (sink current)
when VCC is low. Fault is an
active-low output which reports in
the output-on mode. Internal pull-
up circuitry is provided to ensure
the output pin turns on when the
Control pin is floating.
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
Features
s Fault Detection
Open Circuit
Short Circuit
Over Temperature
s VCC Sense: Output Turns
On with Loss of VCC
s Low Standby Current
Block Diagram
VCC
VCC(SENSE)
Control
Fault
ISOURCE
Drive
& Bias
Duty cycle
during
short circuit
Overtemp
Shutdown
+
short circuit
- detect
-
open circuit
+ detect
Output
Package Options
8 Lead SO
(internally fused leads)
Output 1
VCC
Fault
Control
Gnd
Gnd
Gnd
Gnd
Gnd Gnd Gnd Gnd
Rev. 12/28/98
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
1 A Company
¨




Cherry Semiconductor Corporation

CS1108 Datasheet Preview

CS1108 Datasheet

Single Lamp Driver IC

No Preview Available !

Electrical Characteristics: 4.75V ² VCC ² 5.25V, -40¡C ² TA ² 85¡C; -40¡ ² TJ ² 150¡C
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
s Supply Requirements
VCC Quiescent Current
VCC Quiescent Current
Output ON
Output OFF
36
100 250
s Output
Leakage Current
Saturation Voltage
VOUTPUT (self-bias)
VBAT =14V
I OUTPUT = 350mA
I OUTPUT = 180mA
VCC < 4.5V, I OUTPUT < 200mA
16 100
1.1 1.5
0.9 1.3
3.5
s Current Sense
Short Circuit Current
Open Circuit Current
Output in the ON state
350 500 650
20 40 60
UNIT
mA
µA
µA
V
V
V
mA
mA
s Control - Input
Input Voltage
Input Current
Logic = High
Logic = Low
Logic = VCC
Logic = 0V
2.0 V
0.8 V
20 40 µA
-50 -20
µA
s Fault Output - (Open Collector)
Output Low Voltage
I FAULT = 250µA (sink)
s Overtemperature Shutdown
TJ Output Disable Threshold
TJ Hysteresis
(guaranteed by design)
(guaranteed by design)
0.24 0.40
V
150 180
5
ûC
ûC
Note: A fault signal will be shown (at the fault pin) during inrush as the short circuit threshold is exceeded.
PACKAGE PIN #
8 Lead SO Narrow
1
2
3
4
5, 6, 7, 8
Package Pin Description
PIN SYMBOL
FUNCTION
Output
VCC
Fault
Control
Ground
Open collector output.
5V regulated supply input.
Open collector diagnostic output low during open
load, short circuit and overtemperature conditions.
TTL compatible input.
Signal ground.
2


Part Number CS1108
Description Single Lamp Driver IC
Maker Cherry Semiconductor Corporation
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CS1108 Datasheet PDF






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