TS1051

Constant Voltage and Constant Current Controller

For Battery Chargers and Adaptors

1/9

Version: B07

SOT-26

SOP-8

General Description

TS1051 is a highly integrated solution for SMPS applications requiring CV (constant voltage) and CC (constant current)

mode. TS1051 integrated one voltage reference, two operational amplifiers, and a current sensing circuit. The voltage

reference combined with one operational amplifier make it an ideal voltage controller, and the other low voltage

reference combined with the other operational amplifier make 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.

Ordering Information

Part No.

Package

Packing

TS1051CX6 RF

SOT-26

3Kpcs / 7” Reel

TS1051CS RL

SOP-8

2.5Kpcs / 13” Reel

Features

●

Constant Voltage and Constant Current Control

●

Low Voltage Operation

●

Precision Internal Voltage Reference

●

Low External Component Count

●

Current Sink Output Stage

●

Easy Compensation

●

Low AC Mains Voltage Rejection

Application

●

Battery Charger

●

Adapters

Block Diagram

Pin Function Description

Name

Type

Function

Analog Input

Input Pin of the Voltage Control Loop

Power Supply

Ground Line. 0V Reference For All Voltage

Out

Current Sink Output

Output Pin. Sinking Current Only

Analog Input

Input Pin of the Current Control Loop

Analog Input

Input Pin of the Current Control Loop

Power Supply

Position Power Supply Line

Pin Definition:

3. Out

Pin Definition:

7, Out

4. N.C

5. N.C