AP4313

Document number: DS37565 Rev.2 - 2

1 of 9

www.diodes.com

October 2014

© Diodes Incorporated

AP4313

A Product Line of

Diodes Incorporated

CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER

Description

The

AP4313

is

a

highly

integrated

solution

for a constant

voltage/constant current mode SMPS application.

The AP4313 contains one 1.21V voltage reference with

1%

accuracy, one current sensing circuit and two operational amplifiers.

Combining the voltage reference with one operational amplifier makes

AP4313 an ideal voltage controller for use in adapters and battery

chargers. The other low voltage reference combined with the other

operational amplifier makes it an ideal current limiter for output low

side current sensing.

The AP4313 is available in SOT26 package.

Features



Constant Voltage and Constant Current Control



Precision Internal Voltage Reference



Few External Components



Easy Compensation



Low Supply Current: 0.5mA



Operating Temperature Range: -40 to +105



Totally Lead-free & Fully RoHS Compliant (Notes 1 & 2)



Halogen and Antimony Free.

“Green” Device (Note 3)

Pin Assignments

(Top View)

1

2

3

4

5

Pin 1 Mark

6

GND

SOT26

Applications



Adapters



Battery Chargers

Notes:

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

2. See http://www.diodes.com/quality/lead_free.html for more information about Di

odes Incorporated’s definitions of Halogen- and Antimony-free, "Green"

and Lead-free.

3. Halogen- and Antimony-

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

<1000ppm antimony compounds.

Typical Applications Circuit

1.210V

GND

Rss

R4

To primary

R2

R1

Load

C1

R3

C3

R5

R6

500

AP4313

+

+

(V)

(A)

Typical Application 1

1

2

1

R

R

R

V

V

REF

OUT







SS

SENSE

R

V

it

CurrentLim 