OCP8132
Overview
- Input Voltage Range : 2.7V to 4.8V synchronous boost converter, optimized for maximum
- Dual Channel Output
- 5A camera flash application and maximum 800mA
- Drives up to 1.5A Regulated Output Current movie mode applications using high-current white (0.75A per Channel) LEDs in all single cell Li-ion powered products. An
- High Efficiency PWM Boost Converter adaptive regulation method ensures the current for each LED remains in regulation and maximizes efficiency. M Two simple logic control inputs (ENM and ENF) enable and disable flash and movie mode operation of O the OCP8132. Movie-mode and Flash-mode current levels are independently fixed by two separate .C resistors (RM and RF). For Flash mode, a default timer can be used either to terminate a flash event or as a safety flash timer. One or two LEDs can be connected to the OCP8132; in the case of two LEDs the output P current is matched between each diode. I The OCP8132 integrate an input voltage monitor to monitor low battery conditions and can force the H LED current into movie mode, and an input voltage flash monitor (flash current rising) operates as follows: -C during flash current turn-on the input voltage falls below the VIN Flash Monitor threshold, the flash current is stopped at the level that the current ramp had risen to, at the time of the VIN Flash Monitor T events. Thermal regulation is integrated in Flash mode to N limit the IC’s temperature and continuously provide the maximum allowed output current. E The OCP8132 contain a thermal management I system to protect the device; a internal over-voltage protection (OVP) circuitry prevents damaged to the OCP8132 from open LED or open circuit conditions; R and a cycle-by-cycle current limit prevents damage to the OCP8132. Built-in circuitry prevents excessive .O inrush current during st
