AP3102/V/L

Document number: DS37419 Rev.2 - 2

9 of 14

www.diodes.com

July 2014

© Diodes Incorporated

AP3102/V/L

A Product Line of

Diodes Incorporated

Brown-out and BOK Pin

The switching converter normally has a suitable input range, thus it makes the switching component operate under the safe operation condition.

Too low or too high input will bring large heat shock or voltage spike on the switching device. Brown-out and line OVP function will avoid the

supply to be worked in the unwanted condition such as below minimum and over maximum line voltage. The internal BOK connection is shown as

the figure below:

SENSE

OCP

0.85V

BOK

BOK

OVP

4V

0.5V

0.9V

5V

BOK

Disable

UVLO

1

A

V

CB

R1

R2

3

6

+

or under 0.5V (brown-out trigger), the IC enters the auto-recoverable protection. The ratio of R1/R2 is used to adjust the line voltage divider value.

VON

No Gate Output

UVLO

VCC

35mS

No Gate

HV OK Range

VOFF

HV

4V

No Gate Output

ADJ Pin and Green Mode Operation

Low standby loss is the main requirement for AC-DC off line power supply. The AP3102/V/L has a green mode operation to improve the light load

the switching frequency will decrease with the load decrease. And when the load power becomes much lower, the IC will operate at the skip mode

to reduce switching loss, core loss and other high frequency loss due to blanking the driver. In skipping mode, the high frequency pulses is about

25kHz for the best standby performance.

LEB

Slope

Compensation

Skip Cycle

0.85V

R

2R

ADJ

SENSE

A

R

ADJ

Driver

Control

Circuit

25A

5

2

6

FB