CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER

FOR ADATPTORS AND BATTERY CHARGERS

Figure 1 : Typical Adaptor or Battery Charger Application Using TJ1051

In the avove application schematic, the TJ1051 is used on the secondary side of a flyback adapte

(or battary charger) to provide an accurate control of voltage and current. The above feedback loo

is made with an optocoupler.

Jan. 2007-Rev 1.0

HTC

4

TJ1051

1.210V

Vcc

Out

Vctrl

Gnd

Vsense

Ictrl

200mV

TJ1051

+

Vsense

Rsense

IL

Ric2

500

Ric1

22K

Cic1

2.2nF

Cvc2

22pF

Rout

Top primary

R2

OUT

OUT

+

IL

R1

Rvc

1

Cvc1

2.2n

D