LT1769 datasheet(8/48 Pages) LINER

Part #	LT1769

Description	Dual Smart Battery System Manager Available in 48-Lead TSSOP Package

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LTC1760

8

1760fa

TYPICAL PERFORMANCE CHARACTERISTICS

Dual Charging Batteries with

Different Charge State

Dual Battery Discharge Time vs

Sequential Battery Discharge

(Li-Ion)

Dual Battery Dischage Time vs

Sequential Battery Discharge

(NiMH)

Charging Voltage Accuracy

Charging Current Accuracy

Dual Battery Charge Time vs

Sequential Battery Charging

ChargingVoltage() (mV)

4700

–10

–5

0

14428

1760 G01

–15

–20

–25

7132

9564

11996

16860

ChargingCurrent() (mA)

–20

–10

0

10

–15

–5

5

800

1600

2400

3200

1760 G02

4000

0

TIME (MINUTES)

3500

3000

2500

2000

1500

1000

500

0

3500

3000

2500

2000

1500

1000

500

0

1760 G03

0

50

100

150

200

250

300

BAT1

CURRENT

BAT2

CURRENT

SEQUENTIAL

DUAL

BAT1

CURRENT

100

MINUTES

BATTERY TYPE: 10.8V Li-Ion (MOLTECH NI2020)

REQUESTED CURRENT = 3A

REQUESTED VOLTAGE = 12.3V

MAX CHARGER CURRENT = 4.1A

BAT2

CURRENT

BAT2

VOLTAGE

BAT2

CURRENT

BAT1

CURRENT

BAT1

VOLTAGE

BAT1 INITIAL CAPACITY = 0%

BAT2 INITIAL CAPACITY = 90%

PROGRAMMED CHARGER CURRENT = 3A

PROGRAMMED CHARGER VOLTAGE = 16.8V

TIME (MINUTES)

0

120

1760 G04

40

80

160

17.0

16.5

16.0

15.5

15.0

14.5

14.0

13.5

20

60

100

140

3500

3000

2500

2000

1500

1000

500

0

TIME (MINUTES)

0

120

12.0

11.0

10.0

9.0

8.0

12.0

11.0

10.0

9.0

8.0

1760 G05

20

180

40

60

80 100

140 160

BAT1

VOLTAGE

BAT1

VOLTAGE

DUAL

SEQUENTIAL

BAT2

VOLTAGE

BAT2

VOLTAGE

BATTERY TYPE: 10.8V Li-Ion (MOLTECH NI2020)

LOAD CURRENT = 3A

11

MINUTES

TIME (MINUTES)

0

120

20

40

60

80

100

140

15

14

13

12

11

10

15

14

13

12

11

10

1760 G06

BAT2

VOLTAGE

BAT2

VOLTAGE

BAT1

VOLTAGE

BAT1

VOLTAGE

BATTERY TYPE: 12V NiMH (MOLTECH NJ1020)

LOAD: 33W

16

MINUTES

DUAL

SEQUENTIAL

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LT1769 Datasheet(PDF) 8 Page - Linear Technology

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