[AP2071AEN]

MS1607-E-00

- 1 -

2014/03

1. General Description

The AP2071AEN is a white LED driver IC for camera flash, using EDLC (Electronic Double Layer

Capacitor) in portable equipment. The AP2071AEN integrates a current mode synchronous boost DC-DC

converter and four maximum 2A current sources (maximum 8.0A total). The internal boost DC-DC converter

integrates a switching FET and synchronous rectifier, and supporting small size multilayer inductor with

2MHz switching frequency. An integrated EDLC voltage control circuit and a charge current control circuit

makes the AP2071AEN most suitable for EDLC charge systems. The AP2071AEN also includes eight

protections that are an under voltage lock out, EDLC cell short/open protection, thermal detection, LED

open/short detection, LED thermal protection, output-ground short protection, inductor current limitation and

flashing time limitation to avoid significant system problems. Flash current, torch current, charge current,

inductor limit current, flash on-time and EDLC full charge voltage are programmable through I

The AP2071AEN is housed in a small size package (24-pin QFN, 4.0mm x 4.0mm) to utilize less board space.

2. Features

 Power Supply Voltage(VIN): 2.5V~5.5V

 LED Current:

max 8.0A, total (max 2.0A/ch)

 High Efficiency:

- 90% @ VIN pin=3.7V, VOUT pin=4.5V, total LED current= 240mA,

Torch mode, with recommended external parts

 Switching Frequency:

2.0 MHz

 Mode:

- Charge (charge to EDLC)

- Flash

- Torch

- Bypass torch

(Boost circuit off, only drive LEDs with fixed current source)

- Discharge

- Flash/Torch LED current setting (Each channel can be set independently)

- Flashing ON-time setting

- Charge current setting

- Current Limit value setting

- Full charge voltage setting (EDLC)

- Discharge finishing voltage setting (EDLC)

- NTC voltage detection voltage setting

 Protection Function:

- UVLO (Under Voltage Lock Out) protection

- EDLC cell short/open protection

- Thermal protection

- LED Open/Short protection

- LED thermal protection

- Output-GND protection

- Inductor current limitation protection

- Flashing time limitation protection

 Ta:

-30 to 85C

 Package:

24-pinUQFN (4.0 x 4.0mm, 0.5mm pitch)

High Current (8A) white LEDs driver for Flash with I

AP2071AEN