ADP1653

Compact, High Efficiency, High Power, Flash/Torch LED Driver with Dual Interface

Not Recommended for New Designs

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Alternative Parts

ADP1660

Dual 750 mA LED Flash Driver with I²C-Compatible Interface

Overview

Features and Benefits
Product Details

Features and Benefits

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

Product Details

The ADP1653 is a very compact, high efficiency, high power, camera flash LED driver optimized for cellular phones. The high efficiency and dynamic LED current control of the device 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.

Applications

Camera-enabled cellular phones, smart phones
Digital still cameras, camcorders, PDAs

Product Categories

Power Management
- LED Flash Drivers
- Step-Up (Boost) LED Drivers

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Product Lifecycle Not Recommended for New Designs

This designates products ADI does not recommend broadly for new designs.

Evaluation Kits (1)

EVAL-ADP1653

ADP1653 Evaluation Board

EVAL-ADP1653

View Detailed Evaluation Kit Information

The evaluation system is composed of a motherboard and a daughterboard. The motherboard provides the I2C signals from the computer USB port and generates the I/O voltages and digital high and low signals for the daughterboard. For temperature measurement, the daughterboard can be either plugged directly into the motherboard or connected to the motherboard via the ribbon cable provided with the evaluation kit.

The motherboard features a 3.3 V regulator and a 1.8 V regulator. The jumpers on the bottom left of the motherboard set the VIC voltage, which is the I2C voltage for the control pins. Users can choose among the 1.8 V, 3.3 V, or 5 V USB or the external VBAT as the supply voltage for the daughterboard.

The daughterboard contains numerous jumpers and test points for easy evaluation of the board. Also included with the kit are two current probes that can be plugged directly into jumper heads to measure currents with current probes.