红外线滤光片驱动
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红外线滤光片驱动
ET1511B
ET1511A/B is an infrared filter switch driver IC which designed for filter control driving in IR cut module in camera. ET1511A/B could functions as a one-channel, low output headroom voltage, bi-directional H-bridge driver by appropriate input controls. Build-in protection diode circuit can minimize the disturbance caused by the feedback current when IR cut is shutdown or ESD transient pulses appeared.
The output driver impedance of ET1511A/B is 2Ω in typical. The current driven through the actuator is determined by the impedance of the IR cut. In case of 5V power supply, the 300mA driving current through actuator is around 300mA with 0.48V output voltage headroom.
There are 2 versions (Ver. A and Ver. B) of ET1511, which offers to support single-wire input control, dual-wire input control, and one-shot control. In one-shot control mode, the on time could be configured by external capacitor.
Features
1.8V to 5.5V operation voltage range
1.8V input pulse driving
Ultra low saturation voltage
-0.36V@200mA, VDD=5V
- 0.57V@300mA, VDD=5V
Ultra-low standby current
Build-in MOSFET shoot through protection circuit to prevent from device damage by fast output transient
SOT23-6L package
A/B versions selectable
-Ver. A in dual-wire control
-Ver. B in one-shot mode control
Applications
IR surveillance camera filter driver
Body worn video
Wearable IR camera
Smart locker
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