BROADCHIP BCT3142
The BCT3142 is a current-regulated charge pump ideal for powering high brightness LEDs for camera flash applications. The charge pump can be set to regulate two current levels for FLASH and TORCH modes. The BCT3142 incorporates a 1-wire interface to program the flash LED current at 8 levels and flash timeout at 2 leve.| Part No. | BCT3142 |
|---|---|
| Datasheet | BCT3142 Download |
| Manufacturer |  BROADCHIP |
| Description | 1.1A Buck/Boost Charge Pump LED Driver |
| Buy | Stock & Price |
GENERAL DESCRIPTION
The BCT3142 supports PWM dimming to adjust the LED brightness during torch application by simply providing a PWM signal to flash pin. The BCT3142 automatically switches modes between step-up 2x and step-down 1x ensuring that LED current does not depend on the forward voltage. It switches at 1.9MHz, allowing the use of tiny components. The supply voltage ranges from 2.7V to 5.5V and is ideally suited for all applications powered by a single LI-Ion battery cell or three to four NiCd, NiMH, or Alkaline battery cells. The BCT3142 also features a very low shutdown current, an automatic soft-start mode to limit inrush current, as well as voltage and over thermal shutdown control. A low current sense reference voltage (47mV) allows the use of small 0603 current sensing resistors.FEATURES
● Output Current up to 1.1A● 8 FLASH LED Current Levels Selectable by 1-wire Interface: 100%*IFLASH,90%*IFLASH……30%*IFLASH
● 2 Flash Timeout Levels Selectable by 1-wire Interface: 220ms,...
