ACE7168R

Asynchronies Boost WLED Driver

VER 1.1 1

Description

The ACE7168R is a high frequency, asynchronous boost converter. The internal MOSFET can support

up to 10 White LEDs for backlighting and OLED power application, and the internal soft start function can

reduce the inrush current. The device operates with 1-MHz fixed switching frequency to allow small

external components and to simplify possible EMI problems. Moreover, the IC comes with 46V over

voltage protection to allow inexpensive and small-output capacitors with lower voltage ratings. The LED

current is initially set with the external sense resistor Rs.

Features

⚫

VIN Operating Range: 2.5V to 5.5V

⚫

Internal Power N-MOSFET Switch

⚫

Wide Range for PWM Dimming (100Hz to 200kHz)

⚫

1MHz Switching Frequency

⚫

Minimize the External Component Counts

⚫

Internal Soft Start

⚫

Internal Compensation

⚫

Under Voltage Protection

⚫

Over Voltage Protection

⚫

Over Temperature Protection

Application

⚫

Cellular Phones

⚫

Digital still cameras

⚫

PDAs and Smart Phones and MP3 and OLED.

⚫

Probable Instruments

Absolute Maximum Rating

Parameter

Symbol

Ratings

Units

Input Voltage

VIN

－0.3V~6V

V

LX Pin Voltage

LX

－0.3V~42V

V

FB Pin Voltage

FB

－0.3V~6V

V

Operating Temperature Range

TOPR

－40℃~85℃

℃

Storage Temperature Range

TSTG

－65℃~125℃

℃

Lead Temperature (Soldering, 10 sec)

TL

260℃

℃

Internal Power Dissipation

400

mW