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IK3052

Constant Voltage and Constant Current Controller for Adaptors and Battery Chargers

IK Semicon Co., Ltd 

TECHNICAL DATA

Constant Voltage and Constant Current Controller

for Adaptors and Battery Chargers

IK3052

Description

IK3052 is a highly integrated solution for SMPS applications

requiring constant voltage and constant current mode.

IK3052 integrates one voltage reference, two operational amplifiers

(with ORed outputs – common collectors), and a current sensing circuit.

The voltage reference combined with one operational amplifier

makes it an ideal voltage controller, and the other low voltage reference

combined with the other operational amplifier makes it an ideal current

limiter for output low side current sensing.

The current threshold is fixed and precise.

The only external components are:

• A resistor bridge to be connected to the output of the power supply

(adapter, battery charger) to set the voltage regulation by dividing

the desired output voltage to match the internal voltage reference

value.

• A sense resistor having a value and allowable dissipation power

which need to be chosen according to the internal voltage threshold.

• Optional compensation components (R and C).

IK3052, is ideal for smallest package available, is ideal for space

shrinked applications such as adapters and battery chargers.

PIN CONNECTION (top view)

Features

• CONSTANT VOLTAGE AND CONSTANT CURRENT

CONTROL

• LOW VOLTAGE OPERATION

• PRECISION INTERNAL COMPONENT COUNT

• CURRENT SINK OUTPUT STAGE

• EASY COMPENSATION

• LOW AC MAINS VOLTAGE REJECTION

Device

IK3052S2T

ORDERI NG I NFORM ATI ON

Operating

Temperature Range

TA = 0° to 85° C

for all packages

Package

Plastic

SOT23-6

Shipping

Tape& Reel

Pin Definitions and Functions

SOT23-6 Pin out

Name

Vcc

GND

Vctrl

Ictrl

Out

Vsense

Pin#

6

2

1

4

3

5

Type

Power Supply

Power Supply

Analog Input

Analog Input

Current Sink Output

Analog Input

Function

Positive Power Supply Line

Ground Line. 0V Reference For All Voltages

Input Pin of the Voltage Control Loop

Input Pin of the Current Control Loop

Output Pin. Sinking Current Only

Input Pin of the Current Control Loop

2011, February, Rev. 01

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