ACE714B

Step-up DC/DC Converter Backlight Driver

VER 1.2

1

Description

The ACE714B is a fixed frequency, constant current step-up DC/DC converter ideal for driving LEDs

used in backlighting applications on cellular phones, PDAs and digital cameras etc. Output voltage of up

to 28V can be derived, and from a 2.5V i

nput three white LED’s can be driven in series. Luminance of the

LED’s is controlled by changing the duty cycle of a PWM signal applied to the CE pin. In addition, an

internal MOSFET with an Rds-on of 0.3

Ω is used. Allow profile and small board area solution can be

achieved using a chip coil and an ultra small ceramic output capacitor.

Features

Application

Absolute Maximum Ratings

Parameter

Symbol

Value

Unit

Vin Voltage

V

Output Voltage

V

LX Voltage

V

FB Voltage

V

CE Voltage

V

OVP Voltage

V

Power Dissipation

600

mW

Operating Junction Temperature

-25 to +85

℃

Storage Temperature Range

-40 to +125

℃

Caution: The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These

values must therefore not be exceeded under any conditions.