Linear DC101 User Manual

1

DEMO MANUAL DC101

SMART BATTERY CHARGER

LT1511 Level 2, Smart

Battery Charger Demo Board

with SMBus Interface

The DC101 board is a standalone Smart Battery charger
that receives Charging Voltage(), Charging Current() and
AlarmWarning() commands from the Smart Battery via
the System Management Bus (SMBus) and sets charging
current and voltage accordingly. The charger continu-

ously monitors the built-in thermistor in the battery. The
thermistor information is used by the software to inhibit
charging at temperature extremes and to set charging
strategy for different battery chemistries.

, LTC and LT are registered trademarks of Linear Technology Corporation.

Input Voltage

16

24

27

V

Input Current

Hardware Limited

2

A

Output Current

Software Limited

0

2.5

A

Output Voltage

Software Limited

4

20

V

Thermistor Resistance

Ni-MH Battery

3

30

k

Ω

Li-Ion Battery

0.5

1

1.5

k

Ω

VOLTAGE PWM

CURRENT PWM

SHUTDOWN

DC OUT

GND

C  SMBus 
    CLOCK (SCL)

D  SMBus 
    DATA (SDA)

T  THERMISTOR

BATTERY
CONNECTOR

+

–

5V

SMB

µ

P

Q1

Q2

Q3

DC101 BD

LT

®

1511

CHARGER

FROM

WALL

CUBE

R10

SYSTEM CURRENT

5V

LT1129

+

–

26

14

15

2

11

PIC16C73

13

12