AP3965/66/71

Document number: DS36531 Rev. 3 - 2

1 of 13

www.diodes.com

November 2013

© Diodes Incorporated

AP3965/66/71

A Product Line of

Diodes Incorporated

CPC

FB

VCC

CS

C

C

GND

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PRIMARY SIDE POWER SWITCHER FOR FLYBACK/NON-ISOLATED BUCK SMPS

Description

The AP3965/66/71 consists of a primary side regulation controller and

a high voltage transistor, and is specially designed for off-line power

supplies within 12W output power or non-isolated buck applications

within 5W. Typical applications include adapter for ADSL, auxiliary

supplies or open frame types for appliances.

The AP3965/66/71 operates at pulse frequency modulation (PFM),

and provides accurate constant voltage, constant current (CV/CC)

regulation without requiring an opto-coupler and secondary control

circuitry. It has internal cable compensation function for tight constant

voltage regulation.

The AP3965/66/71 solution has fewer component numbers, smaller

size, and lower total cost.

The AP3965 is packaged in SO7. The AP3966/71 is available in

PDIP-7.

Features

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Primary Side Control for Eliminating Opto-coupler and

Secondary CV/CC Control Circuitry

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Low Start-up Current: 0.2µA (Typ)

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Internal Output Cable Voltage Drop Compensation

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Random Frequency Modulation for Low EMI

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Short Circuit Protection

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Low Total Cost Solution

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Output Power Range (Note 1)

:

AP3965 for 5W Adapter and 3W Buck

AP3966 for 10W Adapter and 4.5W Buck

AP3971 for 12W Adapter and 5W Buck

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Totally Lead-free & Fully RoHS Compliant (Note 2 & 3)

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Halogen and Antimony Free. “Green” Device (Note 4)

Pin Assignments

M Package

(SO7)

For AP3965

P7 Package

(PDIP-7)

For AP3966/71

Applications

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Adapters

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Set Top Boxes

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Auxiliary Supplies

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Appliances

Notes:

1. Typical continuous power in a non-ventilated enclosed adapter measured at +50°C ambient.

2. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

3. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"

and Lead-free.

4. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.

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CPC

FB

VCC

CS

C

C

GND