AP8802

1A LED Step-down Converter

AP8802 Rev. 5

4 of 16

DECEMBER 2009

DS31766

www.diodes.com

Block Diagram

Voltage

Regulator

5V

R

CTRL

GND

SET

SW

Sensing

Block

AP8802

PWM/DC

Control

Figure 2: AP8802 block diagram

Absolute Maximum Ratings

Symbol

Parameter

Rating

Unit

VIN pin voltage

-0.3~50

V

SW voltage

-0.3~50

V

Junction Temperature

150

Lead Temperature Soldering

300

Storage Temperature Range

-65 to +150

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 condition.

Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when

handling and transporting these devices

Recommended Operating Conditions

Symbol

Parameter

Min

Max

Unit

Ambient Temperature Range

-40

105

ºC

Duty Cycle

Using Inductor

≥ 100µH (Note 3)

0.1

0.95

Notes:

3. For most applications the LED current will be within 8% over the duty cycle range specified. Duty cycle accuracy is also dependent on

propagation delay. Smaller size inductors can be used but LED current accuracy may be greater than 8% at extremes of duty cycle. This is

most noticeable at low duty cycles (less than 0.1) or when the input voltage is high and only one LED is being driven.