DS2770 Datasheet, PDF (1/27 Pages) Dallas Semiconductor – Battery Monitor and Charge Controller

www.maxim-ic.com
DS2770
Battery Monitor and Charge Controller
FEATURES
§ Integrated charge controller supporting both
rechargeable lithium and NiMH battery
technologies
§ Available in two configurations:
– Internal 25mW current-sense resistor
– External user-selectable sense resistor
§ Current measurement:
– 15-bit bidirectional measurement
– Internal sense resistor configuration:
62.5mA LSB and ±2A dynamic range
– External sense resistor configuration:
1.56mV LSB and ±51.2mV dynamic range
§ Current accumulation
– Internal sense resistor: 0.25mAh LSB
– External sense resistor: 6.25mVh LSB
§ Voltage measurement with 4.88mV resolution
§ Temperature measurement using integrated
sensor with 0.125°C resolution
§ 40 bytes of lockable EEPROM
§ 16 bytes of general-purpose SRAM
§ 42-day timer
§ Dallas 1-Wire^â interface with 64-bit ID
§ 1.8V logic levels
§ Low power consumption:
– Active current: 80mA typical
– Sleep current:
0.5mA typical
PIN ASSIGNMENT
UV 1
CC 2
VCH 23
SNS ₄
SNS 5
SNS ₆
NC ₇
IS2 8
16 VDD
15 VIN
14 DQ
13 ^VSS
12 VSS
11 ^VSS
10 ^NC
9 IS1
DS2770
16-Pin TSSOP
PIN DESCRIPTION
UV – Battery Undervoltage Detect Output
CC – Charge Control Output
VCH – Charge Supply Input
SNS – Sense Resistor Connection
IS2 – Current-Sense Input
IS1 – Current-Sense Input
VSS – Device Ground
DQ – Data Input/Output
VIN – Voltage Sense Input
VDD – Power Supply Input
NC – No Connect
ORDERING INFORMATION
ORDERING NUMBER
MARKING
DS2770AE
D2770EA
DS2770BE
D2770EB
DS2770AE/T&R
D2770EA
DS2770BE/T&R
D2770EB
DS2770AE-025
2770EAR
DS2770BE-025
2770EBR
DS2770AE-025/T&R
2770EAR
DS2770BE-025/T&R
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
1-Wire is a registered trademark of Dallas Semiconductor.
1 of 27
041202