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CS1108EDF8 の電気的特性と機能

CS1108EDF8のメーカーはCherry Semiconductor Corporationです、この部品の機能は「Single Lamp Driver IC」です。


製品の詳細 ( Datasheet PDF )

部品番号 CS1108EDF8
部品説明 Single Lamp Driver IC
メーカ Cherry Semiconductor Corporation
ロゴ Cherry Semiconductor Corporation ロゴ 




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CS1108EDF8 Datasheet, CS1108EDF8 PDF,ピン配置, 機能
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
Web Site: www.cherry-semi.com
1 A Company
¨

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CS1108EDF8 pdf, ピン配列
Circuit Description
The CS1108 lamp 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.
The CS1108 is designed to provide overcurrent protection
by duty cycle control. When the lamp current exceeds the
internally programmed current limit threshold (typically
500mA), the output enters duty cycle mode to reduce
power dissipation of the IC to a safe level.
Typical lamps have a low resistance when off and the cur-
rent will exceed the current limit threshold during the ini-
tial inrush period. During this inrush time, the IC will be
operating in the duty cycle mode. Due to characteristics of
lamps in this mode, they may appear dimly lit. This condi-
tion will persist for a brief time until the lamp resistance
has increased enough to reduce itÕs current below the
threshold. Once this occurs the lamp will appear at full
brightness. During the inrush period the Fault pin will be
forced low indicating that duty cycle mode is in operation.
Thermal protection has been designed into this IC. Should
duty cycle mode operate for an extended amount of time
and the power limitations of the IC are exceeded the IC die
temperature will rise. Once the die temperature reaches the
thermal temperature limit, the internal circuitry will shut-
off the output and the lamp will turn off. Once the die tem-
perature lowers below the thermal threshold then the out-
put will be allowed to turn back on.
VBAT
Applications Diagram
10nF
20k
VCC
Output
Gnd
CS1108
VCC
Gnd
Fault
Gnd
Control Gnd
microprocessor
3


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共有リンク

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部品番号部品説明メーカ
CS1108EDF8

Single Lamp Driver IC

Cherry Semiconductor Corporation
Cherry Semiconductor Corporation
CS1108EDFR8

Single Lamp Driver IC

Cherry Semiconductor Corporation
Cherry Semiconductor Corporation


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