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| 型号： | DS2790G+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/41页 |
| 文件大小： | 0K |
| 描述： | IC FUEL GAUGE BATT 28-TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 燃料，电量检测计/监控器 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 2.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-TDFN |
| 供应商设备封装： | 28-TDFN-EP（8x4） |
| 包装： | 带卷 (TR) |
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DS2790
Programmable 1-Cell Li-Ion Fuel
Gauge and Protector
www.maxim-ic.com
GENERAL DESCRIPTION
The DS2790 provides a complete fuel gauging and
protection solution for single cell Li-Ion battery packs.
A low-power 16-bit MAXQ20 microcontroller with
generous program and data memory, combined with
an accurate measurement system for battery current,
voltage, and temperature provide the ideal platform
for customized fuelgauge algorithms. The 2-wire
interface provides an I 2 C- or SMBus ? -compatible
communication path between the host and battery
pack, while providing password protected
programming of the fuel-gauging firmware. EEPROM
data memory supports nonvolatile in-pack storage of
charge parameters, cell characteristics, usage
history, and manufacturing/lot tracking data.
An autonomous state machine performs voltage,
current, and temperature related protection functions.
This capability increases reliability of the whole
system by eliminating dependence on the CPU for
protection. The DS2790 supports Li-Ion batteries in a
wide range of applications.
FEATURES
Accurate Current Measurement for Coulomb
Counting (Current Accumulation)
1.5% ±7.8μV over ± 64mV Input Range
1.5% ±520μA over ±4.2A Range Using an
External 15m Ω Series Resistor
High Resolution Current Reporting
12-bit + Sign Average Every 88ms
15-bit + Sign Average Every 2.8s
Voltage Measurement
10-bit Average
Temperature Measurement
10-bit Using On-Chip Sensor
16-bit MAXQ20 Low Power Microcontroller
Efficient C-Language Programming
8k Words Total Program Memory
? 4k Words EEPROM Program Memory
? 4k Words ROM Program Memory
64 Words Data EEPROM
256 Words Data RAM
State Machine-Driven Protection
Protection Independent of CPU Operation
TYPICAL OPERATING CIRCUIT
1nF × 2
PACK+
Programmable Levels for:
? Overvoltage/Undervoltage
? Overcurrent
? Temperature Limits
Lithium-Ion Protector Drives Highside N-FETs
Industry Standard 400kHz 2-Wire interface
Password Protected Programming
VIN
CC
DC
PLS
Operates as Low as 2.5V Input on V DD
SHA-1 Hash Algorithm in ROM
DS2790
0.1 μF 0.1 μF
VDD
CP
AVSS
VSS
[P0.0 - P0.5]
SCL
SDA
6
150 Ω
150 Ω
CLK
DATA
Internal Oscillator ? No Crystal Required
Low Power Consumption
3.3mA CPU Mode (1MHz), 280μA Analog Mode,
4.5μA Sleep Mode
SNS1
IS2
0.1 μ F
R SNS
SNS2
IS1
5.6V
(1)
5.6V
(1)
PACK-
ORDERING INFORMATION
PART TEMP RANGE PIN-PACKAGE
DS2790E+
-20oC to +70oC
TSSOP-28
2.5V
(1)
(1) Optional for 8kV/15kV ESD
DS2790G+ -20oC to +70oC
Contact factory concerning Mask ROM devices.
TDFN-28
+ Denotes lead-free package.
MAXQ is a registered trademark of Maxim Integrated Products,
PIN CONFIGURATION
See last page for TSSOP and TDFN packages.
Inc.
SMBus is a trademark of Intel Corp.
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata .
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REV: 030107
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