The ADP1650ACPZ-R7 is a very compact, highly efficient, single white LED flash driver for high resolution camera phones that improves picture and video quality in low light environments. The device integrates a programmable 1.5 MHz or 3 MHz synchronous inductive boost converter, an I2C-compatible interface, and a 1500 mA current source. The high switching frequency enables the use of a tiny, 1 mm high, low cost, 1 μH power inductor, and the current source permits LED cathode grounding for thermally enhanced, low EMI, and compact layouts.
The LED driver maximizes efficiency over the entire battery voltage range to maximize the input-power-to-LED-power conversion and to minimize battery current draw during flash events. A programmable dc battery current limit safely maximizes LED current for all LED VF and battery voltage conditions.
Two independent TxMASK inputs permit the flash LED current and battery current to reduce quickly during a power amplifier current burst. The I2C-compatible interface enables the pro-grammability of timers, currents, and status bit readback for operation monitoring and safety control.
The ADP1650ACPZ-R7 comes in a compact 12-ball, 0.5 mm pitch WLCSP package and operates within specification over the full −40°C to +125°C junction temperature range.
Applications- Camera-enabled cellular phones and smart phones
- Digital still cameras, camcorders, and PDAs
Feature
- Small, 2 mm × 1.5 mm, 12-ball WLCSP package
- Smallest footprint, 1 mm height, 1 μH power inductor
- LED current source for local LED grounding Simplified routing to/from LED Improved LED thermals
- Synchronous 3 MHz PWM boost converter, no external diode
- Reduces high levels of input battery current during flash
- Limits battery current drain in torch mode
- Currents up to 1500 mA in flash mode for one LED with ±7% accuracy over all conditions
- Currents up to 200 mA in torch mode
- Programmable dc battery current limit (4 settings)
- Programmable flash timer up to 1600 ms
- Low VBAT mode to reduce LED current automatically
- 4-bit ADC for LED VF, die/LED temperature readback
- See data sheet for additional features
Applications
- Camera-enabled cellular phones and smart phones
- Digital still cameras, camcorders, and PDAs
(Picture: Pinout)
