AP3983B/C/D

Document number: DS36784 Rev. 4 - 2

8 of 13

www.diodes.com

July 2016

© Diodes Incorporated

AP3983B/C/D

Leading Edge Blanking (LEB)

When the power switch is turned on, a turn-on spike on the output pulse rising edge will occur on the sense-resistor. To avoid false termination of

the switching pulse, a typical 500ns leading edge blanking is built in. During this blanking period, the current sense comparator is disabled and the

gate driver cannot be switched off.

The built-in LEB in AP3983B/C/D has shorter delay time from current sense terminal to output pulse than those IC solutions adopting external RC

filter as LEB.

Built-in Cable Compensation

The AP3983B/C/D has built-in fixed voltage of 0.3V typical to compensate the drop of output cable when the load is changed from zero to full load.

A typical 10nF external capacitor connected to the CPC pin is used to smooth voltage signal for cable compensation.

Over Temperature Protection

The AP3983B/C/D has internal thermal sensing circuit to shut down the PFM driver output when the die temperature reaches +160°C typical.

When the die temperature drops about +40°C, the IC will recover automatically to normal operation.

Ordering Information

AP3983X XX XX - XX

Packing

Package

TR : Tape & Reel

M : SO-7

G1 : Green

Product Name

RoHS/Green

AP3983B

AP3983C

AP3983D

P7 : PDIP-7

Blank : Tube

Package

Temperature Range

Part Number

Marking ID

Packing

SO-7

-40°C to +105°C

AP3983BMTR-G1

3983BM-G1

4000/Tape & Reel

SO-7

AP3983CMTR-G1

3983CM-G1

4000/Tape & Reel

PDIP-7

AP3983CP7-G1

AP3983CP7-G1

50/Tube

PDIP-7

AP3983DP7-G1

AP3983DP7-G1

50/Tube