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LED Driver/Monitor
AD8240
FEATURES
PWM input for LED brightness control Open LED detection Latch-off overcurrent protection Constant voltage regulated output Supply range: 9 V to 27 V Regulated voltage range: 12.
5 V to 27 V Operating current: 300 µA Shutdown current: 10 µA Temperature range −40°C to +125°C 8-lead MSOP package
FUNCTIONAL BLOCK DIAGRAM
VPLUS SHUNT
5 6
BASE
7
VO
8
RSENSE VSENSE 1 10kΩ
5V 2 REFERENCE LATCH-OFF DRIVER
R1 350kΩ
PWM
3
R2 250kΩ
04824-0-001
GENERAL DESCRIPTION
The AD8240 LED driver/monitor, in combination with an external
transistor, supplies a constant 12 V to drive LED lamps.
This allows cost-effective LED lamp monitoring and short-c...