AP3152

120mA HIGH EFFICIENCY WHITE LED DRIVER

AP3152 Rev. 1

10 of 11

SEPTEMBER 2007

www.diodes.com

Disabled Current Sinks

Unused current channels must be disabled by connecting the

disabled channel.

Soft-Start and Soft-Stop

Soft-start and Soft-stop function are incorporated to prevent

excessive inrush current during power-up, mode switching,

power-down, transition out of stand-by mode.

Short-Circuit Protection

Short-circuit protection function is incorporated to prevent

excessive load current when either flying cap terminals or output

pin electrically tied to a very lower voltage or ground.

Over-Voltage Protection

Over-voltage protection function is incorporated to limit the

output voltage under a safe value to avoid on-chip device

breakdown.

Under-Voltage Lockout

Under-voltage lockout feature disables the device when the

input voltage drops below UVLO threshold.

Thermal Shutdown

will be disabled and enter stand-by mode. The operation will be

resumed whenever the die cools off sufficiently.

Switching Frequency

By default, AP3152 is working at 1.2Mhz switching frequency. It

can also work at 0.6MHz or 1.8MHz switching frequency set

through SDI. User can choose the appropriate switching

frequency with consideration of noise immunity, input/output

voltage ripple requirement, and capacitor selection etc.

Up Spread Spectrum Control

When this feature is enabled through SDI, the switching

frequency periodically varies between 100% and 110% of

nominal frequency.

It flattens the peak energy on nominal

frequency over a range of frequency band so that EMI effect is

significantly reduced.

PWM Dimming Control

The AP3152 provides flexible dimming control with either

16-level SDI protocol control or PWM dimming control through

SDI pin. When PWM dimming control is enabled, the sink

current is adjusted by the duty cycle of the signal applied on SDI

pin.

Marking Information

Y :Year 0~9

M : Month A~L

( Top View )

X :G : Green

Y M X

XX

XX : FH : AP3152

Part Number

Package

Identification Code

AP3152

DFN3030-12

FH