DS2442 datasheet, PDF - EEWORLD Datasheet

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DS2442: DescriptionPower Supply Support Circuit, Fixed, 1 Channel, MOS, PDSO8, 0.150 INCH, SOIC-8; CategoryPower/power management The power supply circuit; File Size185KB，29 Pages; ManufacturerDALLAS; Websitehttp://www.dalsemi.com

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DS2442 Overview

Power Supply Support Circuit, Fixed, 1 Channel, MOS, PDSO8, 0.150 INCH, SOIC-8

DS2442 Parametric

Parameter Name	Attribute value
Is it Rohs certified?	incompatible
package instruction	0.150 INCH, SOIC-8
Reach Compliance Code	unknown
Adjustable threshold	NO
Analog Integrated Circuits - Other Types	POWER SUPPLY SUPPORT CIRCUIT
JESD-30 code	R-PDSO-G8
JESD-609 code	e0
Number of channels	1
Number of functions	1
Number of terminals	8
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Encapsulate equivalent code	SOP8,.25
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
power supply	2.4/10 V
Certification status	Not Qualified
Maximum supply current (Isup)	0.1 mA
Maximum supply voltage (Vsup)	10 V
Minimum supply voltage (Vsup)	2.4 V
Nominal supply voltage (Vsup)	7.2 V
surface mount	YES
technology	MOS
Temperature level	INDUSTRIAL
Terminal surface	Tin/Lead (Sn/Pb)
Terminal form	GULL WING
Terminal pitch	1.27 mm
Terminal location	DUAL
Base Number Matches	1

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PRELIMINARY

DS2442

2-Cell Li-Ion Battery Manager

www.dalsemi.com

FEATURES

Provides all identification, information,

instrumentation and protection functions

needed in a lithium-ion battery pack

Supports two-cell battery packs

Protects cells from:

– overvoltage (overcharge)

– undervoltage (overdischarge)

– overcurrent (charging and discharging)

– high temperatures (thermal runaway)

Built-in cell-balancing support circuitry

Current accumulator tracks remaining battery

capacity in 0.5% increments

Voltage measurement with 10 mV accuracy

Temperature measurement with

±2°

accuracy eliminates need for thermistor

32-byte user memory stores battery data

64-bit ROM ID uniquely identifies each

battery pack

1-Wire™ interface carries all commands and

data via a single wire

Programmable alarm warns when cells are

nearly discharged

Programmable I/O pin supports LEDs,

vibration motors and other features

Operating temperature range: -40° to +85°

10kV ESD rating

PIN ASSIGNMENT

PIN DESCRIPTION

GND

PIO

ISENS

CHG

DCHG

Ground

Programmable I/O Pin

Current Sense Input

Voltage Monitor Input

Power Supply Input (2.4V to 10V)

Charge Control Output

Discharge Control Output

Data I/O (1-Wire Interface)

DESCRIPTION

The DS2442 2-Cell Li-Ion Battery Manager provides all essential functions for monitoring, protecting

and managing two-cell lithium-ion battery packs. The DS2442 constantly measures cell voltages, current,

and temperature, and automatically takes action to disable charging and/or discharging of the cells to

protect them when undesirable conditions arise.

Via its 1-Wire interface, the DS2442 provides the host system access to identification information, status

data, configuration and control settings, instrumentation registers, and general purpose data storage. Each

DS2442 has a factory-programmed 64-bit ROM ID which allows the host system to verify the

authenticity of the battery pack as well as a factory-programmed 16-bit manufacturing ID which can be

used to encode assembly location, cell chemistry and other information. A full set of status information

in the DS2442 keeps the host informed about protection conditions, remaining capacity and other matters.

Configuration and control fields in the device allow the host to disable charging and/or discharging, put

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