Analog Devices, Inc. (ADI), recently introduced the ADP1650 1500mA white LED driver, the latest addition to Analog Devices' power management portfolio and its inductor-based flash driver devices. The ADP1650 offers the flexibility to provide a programmable I2C-compatible interface, programmable flashlight and flash current mode (up to 1500 mA for one LED), two independent TxMASK1 inputs, and a 4-bit ADC. At typical battery voltages, efficiencies as high as 85% (90% peak) reduce the high level of input battery current during flash and limit the battery current consumed in flashlight mode. The ADP1650 is available in an ultra-compact 2mm × 1.5mm, 12-pin WLCSP package that reduces PCB (printed circuit board) requirements.
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Jose Rodriguez, technical director of power management technology at Analog Devices, said: "The quality of the camera is one of the most important features of the consumer when choosing a mobile phone. Many camera phones need to take images in poorly lit environments or during calls, so consume I hope the quality of the flash is excellent."
The ADP1650 integrates a programmable 1.5MHz or 3.0MHz synchronous inductive boost converter, 1mm high and low cost, 1μH power inductor and 0603 size input and output capacitors in less than 17mm2 for a complete high power flash design. This new LED driver operates efficiently over the entire battery voltage range, maximizing input power to LED power conversion and minimizing battery current consumption during flash. Designed with limited battery current for flash, the ADP1650 is designed to easily connect to the latest image sensors and processors for superior image quality in low light conditions.
Mr. Rodriguez added: "For portable device designers, achieving maximum light output with limited battery current and shrinking PCB area is a major design challenge. The white LED driver ADP1650 is capable of meeting this challenge."
Features and Benefits of the ADP1650 White LED Driver • The ultra-compact 2mm × 1.5mm, 12-pin WLCSP package reduces PCB requirements.
• Up to 85% efficiency (90% peak) at typical battery voltages, which reduces the high level of input battery current during flash and limits the battery current consumed in flashlight mode.
• Two independent TxMASK transmit shield) inputs can quickly reduce flash LED current and battery current when the power amplifier current rises, protecting the phone.
• The I2C-compatible interface supports timer, current, and status bit readback programming features for operational status monitoring and safety control.
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