CONSTANT VOLTAGE & CONSTANT CURRENT CONTROLLER

TJ1052

Jul. 2010 – Preliminary

- 1 -

HTC

SOT-23 6L

ORDERING INFORMATION

Device

Package

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

Moisture Sensitivity Level 3

APPLICATION

Battery Chargers

Adapters

TJ1052SF6

TJ1052GSF6

SOT-23 6L

DESCRIPTION

TJ1052 is a highly integrated solution for SMPS applications requiring constant voltage and constant current

mode. TJ1052 integrates one voltage reference, two operational amplifiers (with one output - 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 (adaptor, 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.

TJ1052 is ideal for space shrunk applications such as adapters and battery chargers.

Absolute Maximum Ratings

CHARACTERISTIC

SYMBOL

MIN.

MAX.

UNIT

DC Supply Voltage

-

20

V

Input Voltage

-0.3

V

Operating Free Air Temperature Range

0

85

℃

Maximum Junction Temperature

-

150

℃

CHARACTERISTIC

SYMBOL

MIN.

MAX.

UNIT

DC Supply Voltage

2.5

18

V