UB2012

Preliminary

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

6 of 17

www.unisonic.com.tw

QW-R121-018 .C

TYPICAL APPLICATION CIRCUIT

UB2012

GND

C2

10μF

SNS

CC

BAT

STAT

TS

COMP

R1

1kΩ

0.2Ω

DC+

Q1

2SB1151

C1

10μF

TEMP

PACK-

PACK+

R2

2kΩ

D2

Battery

Pack

NTC

Fig. 1 0.5A Low Dropout Li-Lon/Li-Pol Charger

D1

FUNCTIONAL DESCRIPTION

The UTC UB2012 is designed for the applications of single or two-cell Li-Ion or Li-Pol batteries. Fig. 1 is the

schematic of using this advanced linear charge controller with a PNP pass transistor. Fig. 2 is the operation flowchart

of UTC UB2012. Fig. 3 shows the typical charge profile. Fig. 4 is the application schematic of a charger using

P-channel MOSFET.