DS2790G+

DS2790G+ Datasheet

Part	Datasheet
DS2790G+	DS2790G+ (pdf)

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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 I2C- or 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. TYPICAL OPERATING CIRCUIT 1nF x 2 PACK+ 1K 100: 0.1µF 0.1µF CC VIN DC PLS [P0.0 - P0.5] 6 DS2790 SCL AVSS VSS SNS1 IS2 SNS2 IS1 0.1PF RSNS 150 CLK 150 DATA 5.6V 5.6V 1 PACK- 2.5V 1 1 Optional for 8kV/15kV ESD PIN CONFIGURATION See last page for TSSOP and TDFN packages. DS2790 Programmable 1-Cell Li-Ion Fuel Gauge and Protector Accurate Current Measurement for Coulomb Counting Current Accumulation ±7.8µV over ± 64mV Input Range ±520µA over ±4.2A Range Using an External 15m 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 Independent of CPU Operation Programmable Levels for Overvoltage/Undervoltage Overcurrent Temperature Limits Lithium-Ion Protector Drives Highside N-FETs Industry Standard 400kHz 2-Wire interface Password Protected Programming Operates as Low as 2.5V Input on VDD SHA-1 Hash Algorithm in ROM Internal Crystal Required Low Power Consumption 3.3mA CPU Mode 1MHz , 280µA Analog Mode, 4.5µA Sleep Mode ORDERING INFORMATION PART DS2790E+ TEMP RANGE -20ºC to +70ºC PIN-PACKAGE TSSOP-28 DS2790G+ -20ºC to +70ºC TDFN-28 Contact factory concerning Mask ROM devices. + Denotes lead-free package. MAXQ is a registered trademark of Maxim Integrated Products, Inc. SMBus is a trademark of Intel Corp. 1 of 41 DS2790 Programmable 1-Cell Li-Ion Fuel Gauge and Protector ABSOLUTE MAXIMUM RATINGS PLS to -0.3V to +18V CP to VSS -0.3V to +12V DC to VSS to CP+0.3V CC to VSS VDD -0.3V to CP+0.3V P0.4, P0.5 to -0.3V to VDD +0.3V AVSS to -0.3V to +0.3V All other pins to -0.3V to +6V SCL, SDA, Continous Sink Current Each, 50mA Total P0.4, P0.5 Continous Source Current Each, 50mA Total CC, DC Continuous Source/Sink Operating Temperature to +85ºC Storage Temperature Range to +125ºC Soldering Temperature See IPC/JEDEC J-STD-020A Specification Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyone those indicated in the operational sections of the specifications is not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device. DC ELECTRICAL SPECIFICATIONS VDD = 2.5V to 5.5V, TA = -20qC to +70qC unless otherwise noted. Typical values are at VDD = TA = +25qC PARAMETER CONDITIONS MAX UNITS ICPU CPU Mode Note 1, 2 IANALOG ANALOG Mode Note 2 Supply Current SLEEP Mode, Note 2 Brownout Voltage Power-On Reset Voltage Internal System Clock System Clock Error System Clock Startup ISLEEP SLEEP Mode, Note 2 VDD = 4.2V, TA 50qC SLEEP Mode, Note 2 VDD = 2.5V, TA 50qC Note 3 VPOR Note 3 fOSCI fERR:OSCI ±20 OSCA Active tSU:OSCI From SLEEP, OSCA Inactive

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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 I2C- or 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.

TYPICAL OPERATING CIRCUIT
1nF x 2

PACK+
1K 100:
0.1µF 0.1µF

CC VIN

DC PLS
[P0.0 - P0.5] 6

DS2790 SCL

AVSS VSS

SNS1 IS2

SNS2 IS1
0.1PF

RSNS
150 CLK 150 DATA
5.6V 5.6V 1

PACK-
2.5V 1
1 Optional for 8kV/15kV ESD

PIN CONFIGURATION

See last page for TSSOP and TDFN packages.

DS2790

Programmable 1-Cell Li-Ion Fuel Gauge and Protector

Accurate Current Measurement for Coulomb Counting Current Accumulation ±7.8µV over ± 64mV Input Range ±520µA over ±4.2A Range Using an External 15m 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 Independent of CPU Operation

Programmable Levels for Overvoltage/Undervoltage Overcurrent Temperature Limits Lithium-Ion Protector Drives Highside N-FETs Industry Standard 400kHz 2-Wire interface Password Protected Programming Operates as Low as 2.5V Input on VDD SHA-1 Hash Algorithm in ROM Internal Crystal Required Low Power Consumption 3.3mA CPU Mode 1MHz , 280µA Analog Mode, 4.5µA Sleep Mode
ORDERING INFORMATION

PART DS2790E+

TEMP RANGE -20ºC to +70ºC

PIN-PACKAGE TSSOP-28

DS2790G+ -20ºC to +70ºC

TDFN-28

Contact factory concerning Mask ROM devices.
+ Denotes lead-free package.

MAXQ is a registered trademark of Maxim Integrated Products,

Inc.

SMBus is a trademark of Intel Corp.
1 of 41

DS2790 Programmable 1-Cell Li-Ion Fuel Gauge and Protector

ABSOLUTE MAXIMUM RATINGS

PLS to -0.3V to +18V CP to VSS -0.3V to +12V DC to VSS to CP+0.3V CC to VSS VDD -0.3V to CP+0.3V P0.4, P0.5 to -0.3V to VDD +0.3V AVSS to -0.3V to +0.3V All other pins to -0.3V to +6V SCL, SDA, Continous Sink Current Each, 50mA Total P0.4, P0.5 Continous Source Current Each, 50mA Total CC, DC Continuous Source/Sink Operating Temperature to +85ºC Storage Temperature Range to +125ºC Soldering Temperature See IPC/JEDEC J-STD-020A Specification

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyone those indicated in the operational sections of the specifications is not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device.

DC ELECTRICAL SPECIFICATIONS

VDD = 2.5V to 5.5V, TA = -20qC to +70qC unless otherwise noted. Typical values are at VDD = TA = +25qC

PARAMETER

CONDITIONS

MAX UNITS

ICPU

CPU Mode Note 1, 2

IANALOG

ANALOG Mode Note 2

Supply Current

SLEEP Mode, Note 2

Brownout Voltage Power-On Reset Voltage Internal System Clock System Clock Error

System Clock Startup

ISLEEP

SLEEP Mode, Note 2 VDD = 4.2V, TA 50qC

SLEEP Mode, Note 2 VDD = 2.5V, TA 50qC

Note 3

VPOR

Note 3
fOSCI
fERR:OSCI
±20

OSCA Active
tSU:OSCI

From SLEEP, OSCA Inactive

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Datasheet ID: DS2790G+ 508398