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ADG1653

Analog Devices
Part Number ADG1653
Manufacturer Analog Devices
Description camera-flash LED driver optimized
Published Jul 18, 2009
Detailed Description www.DataSheet4U.com Compact, High Efficiency, High Power Flash/Torch LED Driver with Dual Interface ADP1653 GENERAL DES...
Datasheet PDF File ADG1653 PDF File

ADG1653
ADG1653

Overview
www.
DataSheet4U.
com Compact, High Efficiency, High Power Flash/Torch LED Driver with Dual Interface ADP1653 GENERAL DESCRIPTION The ADP1653 is a very compact, high efficiency, high power, camera-flash LED driver optimized for cellular phones.
The device’s high efficiency and dynamic LED current control improve flash brightness and picture quality in dimly lit environments.
Efficiency peaks at 92% and is higher than charge pump solutions over the Li-Ion battery range.
The device has a dual-mode interface that is configurable to 2-bit logic or an I2C interface.
The indicator and high power LED currents are programmable with external resistors or through the I2C interface.
To maximize overall flash brightness, the ADP1653 offers an input to reduce flash LED current in less than 50 μs, referred to as the Tx mask.
Tx masking reduces battery stress by scaling back flash LED current during an RF transmission.
The ADP1653 solution requires only four external components in I2C mode and fits in a 6.
4 mm × 7.
2 mm space.
The part integrates multiple safety features such as soft start, flash timeout, output current limit, thermal protection, and overvoltage protection.
The ADP1653 operates over the −40°C to +125°C junction temperature range.
FEATURES Small 6.
4 mm × 7.
2 mm solution 2.
2 μH power inductor 92% peak efficiency Tx masking within 50 μs 2.
1 A, 12 V power switch Pin-selectable interface: 2-bit logic or I2C® Programmable flash and torch current Up to 200 mA in torch mode Up to 500 mA in flash mode Programmable indicator LED current up to 20 mA Programmable timer register: up to 820 ms flash timeout 2.
75 V to 5.
5 V input voltage range Low noise, 1.
2 MHz PWM operation Safety features Interrupt output pin Fault condition register Short-circuit protection Output overvoltage protection Thermal overload protection Integrated current limit and soft start Small 3 mm × 3 mm, 16-lead LFCSP footprint APPLICATIONS Camera-enabled cellular phones, smart phones Digital still cameras,...


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