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DS2770

Battery Monitor and Charge Controller

www.maxim-ic.com

FEATURES

摟

摟

摟

Integrated charge controller supporting both

rechargeable lithium and NiMH battery

technologies

Available in two configurations:

鈥?Internal 25mW current-sense resistor

鈥?External user-selectable sense resistor

Current measurement:

鈥?15-bit bidirectional measurement

鈥?Internal sense resistor configuration:

62.5mA LSB and

鹵2A

dynamic range

鈥?External sense resistor configuration:

1.56mV LSB and

鹵51.2mV

dynamic range

Current accumulation

鈥?Internal sense resistor: 0.25mAh LSB

鈥?External sense resistor: 6.25mVh LSB

Voltage measurement with 4.88mV resolution

Temperature measurement using integrated

sensor with 0.125擄C resolution

40 bytes of lockable EEPROM

16 bytes of general-purpose SRAM

42-day timer

Dallas 1-Wire

芒

interface with 64-bit ID

1.8V logic levels

Low power consumption:

鈥?Active current:

80mA typical

鈥?Sleep current:

0.5mA typical

PIN ASSIGNMENT

UV

CC

VCH

SNS

SNS

SNS

NC

IS2

1

2

3

2

4

5

6

7

8

16

15

14

13

12

11

10

9

VDD

VIN

DQ

VSS

VSS

VSS

NC

IS1

DS2770

16-Pin TSSOP

摟

摟

摟

摟

摟

摟

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摟

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PIN DESCRIPTION

UV

CC

VCH

SNS

IS2

IS1

VSS

DQ

VIN

VDD

NC

鈥?Battery Undervoltage Detect Output

鈥?Charge Control Output

鈥?Charge Supply Input

鈥?Sense Resistor Connection

鈥?Current-Sense Input

鈥?Current-Sense Input

鈥?Device Ground

鈥?Data Input/Output

鈥?Voltage Sense Input

鈥?Power Supply Input

鈥?No Connect

ORDERING INFORMATION

ORDERING NUMBER

DS2770AE

DS2770BE

DS2770AE/T&R

DS2770BE/T&R

DS2770AE-025

DS2770BE-025

DS2770AE-025/T&R

DS2770BE-025/T&R

MARKING

D2770EA

D2770EB

D2770EA

D2770EB

2770EAR

2770EBR

2770EAR

2770EBR

DESCRIPTION

TSSOP, Ext. Sense Res., 4.1V Charge Voltage

TSSOP, Ext. Sense Res., 4.2V Charge Voltage

DS2770AE on Tape & Reel

DS2770BE on Tape & Reel

TSSOP, 25mW Sense Res., 4.1V Charge Voltage

TSSOP, 25mW Sense Res., 4.2V Charge Voltage

DS2770AE-025 on Tape & Reel

DS2770BE-025 on Tape & Reel

041202

1-Wire is a registered trademark of Dallas Semiconductor.

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