DS2770 查看數據表（PDF） - Maxim Integrated
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DS2770 Datasheet PDF : 27 Pages
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DS2770
Battery Monitor and
Charge Controller
wF§wEwIAn.mtTeUgarxaRitmeEd-Sicch.acrogme 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-Wireâ 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
DESCRIPTION
The DS2770 battery monitor and charge controller performs several functions needed for thorough
battery maintenance. When used in conjunction with the host system’s processor, a battery-pack resident
DS2770 may be utilized for applications that include charging, remaining capacity estimation, safety
monitoring, and nonvolatile (NV) parametric storage. Description continued on page 2.
1-Wire is a registered trademark of Dallas Semiconductor.
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