|Package | PIN:||PWP | 20|
|Temp:||Q (-40 to 125)|
- Qualified for Automotive Applications
- AEC-Q100 Qualified With the Following Results:
- Device Temperature Grade 1: –40°C to +125°C AmbientOperating Temperature
- Input Voltage Operating Range 4.5 V to 40 V
- Two High-Precision Current Sinks
- CurrentMatching 1% (Typical)
- LED String Current up to 160 mA per Channel
- Dimming Ratioof 10 000:1 at 100 Hz
- Integrated Boost/SEPIC Converter for LED String Power
- Output Voltage up to 45 V
- Switching Frequency 300 kHz to 2.2 MHz
- Switching Synchronization Input
- SpreadSpectrum for Lower EMI
- Power-Line FET Control for Inrush Current Protection and Standby Energy Saving
- Extensive Fault Detection Features
- Fault Output
- Input Voltage OVP, UVLO, and OCP
- Open and Shorted LEDFault Detection
- Minimum Number of External Components
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Texas Instruments LP8862QPWPRQ1
The LP8862-Q1 is an automotive high-efficiency, low-EMI, easy-to-use LED driver withintegrated DC-DC converter. The DC-DC supports both boost and SEPIC modes of operation. The devicehas two high-precision current sinks that can provide high dimming ratio brightness control with aPWM input signal.
The boost/SEPIC converter has an adaptive output voltage control based on the LED currentsink headroom voltages. This feature minimizes power consumption by adjusting the voltage to thelowest sufficient level in all conditions. DC-DC supports spread spectrum for switching frequencyand an external synchronization with a dedicated pin. A wide-range adjustable frequency allows theLP8862-Q1 to avoid disturbance for AM radio band.
The input voltage range for the LP8862-Q1 is from 4.5 V to 40 V to support automotivestop/start and load dump conditions. The device supports PWM brightness dimming ratio of 10 000:1for 100-Hz inputPWM frequency. The LP8862-Q1 integrates extensive fault detection features. The device has anoption to drive an external p-FET to disconnect the input supply from the system in the event of afault. This feature also reduces inrush current and standby power consumption.