TECHNICAL DATA

2011, February, Rev. 01

Constant Voltage and Constant Current Controller

for Adaptors and Battery Chargers

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.

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

PIN CONNECTION (top view)

Pin Definitions and Functions

SOT23-6 Pin out

Name

Pin#

Type

Function

Vcc

6

Power Supply

Positive Power Supply Line

GND

2

Power Supply

Ground Line. 0V Reference For All Voltages

Vctrl

1

Analog Input

Input Pin of the Voltage Control Loop

Ictrl

4

Analog Input

Input Pin of the Current Control Loop

Out

3

Current Sink Output

Output Pin. Sinking Current Only

Vsense

5

Analog Input

Input Pin of the Current Control Loop

IK3052

ORDERI NG I NFORM ATI ON

Device

Operating

Temperature Range

Package

Shipping

IK3052S2T

for all packages

Plastic

SOT23-6

Tape& Reel