LTC1760_1 datasheet(8/44 Pages) LINER

Part #	LTC1760

Description	Dual Smart Battery System Manager

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LTC1760

8

1760f

TYPICAL PERFOR A CE CHARACTERISTICS

Efficiency vs Charging Current

Load Dump

Load Regulation

IOUT (A)

0

10

30

40

50

100

70

0.025

0.10

1760 G07

20

80

90

60

0.50

2.5

4.0

TIME (ms)

–4 –2

14

12

10

8

6

4

2

0

1760 G08

4

2

10 12 14 16

0

68

VIN = 20V

VDAC = 12.29V

IDAC = 3000mA

LOAD CURRENT = 1A

TA = 25°C

BAT1

OUTPUT

LOAD

CONNECTED

LOAD

DISCONNECTED

CHARGE CURRENT (mA)

0

4000

1760 G09

1000

2000

3000

12.4

12.3

12.2

12.1

12.0

11.9

11.8

11.7

11.6

VIN = 20V

VDAC = 12.288V

IDAC = 4000mA

TA = 25°C

Power Path Switching 1 and 2

TIME (µs)

16

15

14

13

12

11

10

9

8

7

6

1960 G10

–50 –40 –30

–10

0

10 20

30 40 50

–20

CLOAD = 20µF

ILOAD = 0.8A

TA = 25°C

LOPWR

THRESHOLD

1µs/DIV

1760 G11

5V

0V

RPULLUP = 15k

LTC1760

VCC = 5V

CLD = 200pF

TA = 25°C

Input Power Related

SCN (Pin 4): PowerPath Current Sensing Negative Input.

This pin should be connected directly to the “bottom”

(output side) of the low valued resistor in series with the

three PowerPath switch pairs, for detecting short-circuit

current events. Also powers the LTC1760 internal circuitry

when all other sources are absent.

SCP (Pin 5): PowerPath Current Sensing Positive Input.

This pin should be connected directly to the “top” (switch

side) of the low valued resistor in series with the three

PowerPath switch pairs, for detecting short-circuit cur-

rent events.

PI FU CTIO S

GDCO (Pin 6): DCIN Output Switch Gate Drive. Together

with GDCI, this pin drives the gate of the P-channel switch

in series with the DCIN input switch.

GDCI (Pin 7): DCIN Input Switch Gate Drive. Together with

GDCO, this pin drives the gate of the P-channel switch

connected to the DCIN input.

GB1O (Pin 8): BAT1 Output Switch Gate Drive. Together

with GB1I, this pin drives the gate of the P-channel switch

in series with the BAT1 input switch.

GB1I (Pin 9): BAT1 Input Switch Gate Drive. Together with

GB1O, this pin drives the gate of the P-channel switch

connected to the BAT1 input.

SMBus Accelerator Operation

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LTC1760 Datasheet(PDF) 8 Page - Linear Technology

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