DS2770BE+ datasheet, PDF - EEWORLD Datasheet

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DS2770BE+: DescriptionIC battery monitor 16-tssop; CategoryPower/power management The power supply circuit; File Size293KB，27 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html; Environmental Compliance

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DS2770BE+ Overview

IC battery monitor 16-tssop

DS2770BE+ Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Maker	Maxim
Parts packaging code	TSSOP
package instruction	TSSOP, TSSOP16,.25
Contacts	16
Reach Compliance Code	compliant
ECCN code	EAR99
Factory Lead Time	1 week
Adjustable threshold	NO
Analog Integrated Circuits - Other Types	POWER SUPPLY SUPPORT CIRCUIT
JESD-30 code	R-PDSO-G16
JESD-609 code	e3
length	5 mm
Humidity sensitivity level	1
Number of channels	1
Number of functions	1
Number of terminals	16
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	TSSOP
Encapsulate equivalent code	TSSOP16,.25
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	260
power supply	3/5 V
Certification status	Not Qualified
Maximum seat height	1.1 mm
Maximum supply current (Isup)	0.12 mA
Maximum supply voltage (Vsup)	5.5 V
Minimum supply voltage (Vsup)	2.7 V
Nominal supply voltage (Vsup)	4.1 V
surface mount	YES
Temperature level	INDUSTRIAL
Terminal surface	Matte Tin (Sn)
Terminal form	GULL WING
Terminal pitch	0.65 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	30
width	4.4 mm
Base Number Matches	1

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DS2770

Battery Monitor and

Charge Controller

www.maxim-ic.com

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

interface with 64-bit ID

1.8V logic levels

Low power consumption:

– Active current:

80mA typical

– Sleep current:

0.5mA typical

FEATURES

PIN ASSIGNMENT

VCH

SNS

IS2

VDD

VIN

VSS

IS1

DS2770

16-Pin TSSOP

PIN DESCRIPTION

VCH

SNS

IS2

IS1

VSS

VIN

VDD

– Battery-Undervoltage Detect Output

– Charge-Control Output

– Charge-Supply Input

– Sense Resistor Connection

– Current-Sense Input

– Device Ground

– Data Input/Output

– Voltage-Sense Input

– Power Supply Input

– 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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052605

DS2770

ORDERING INFORMATION

ORDERING NUMBER

DS2770AE+

DS2770BE+

DS2770AE+T&R

DS2770BE+T&R

DS2770AE+025

DS2770BE+025

DS2770AE+025/T&R

DS2770BE+025/T&R

DS2770AE

DS2770BE

DS2770AE/T&R

DS2770BE/T&R

DS2770AE-025

DS2770BE-025

DS2770AE-025/T&R

DS2770BE-025/T&R

MARKING

D2770EA

D2770EB

D2770EA

D2770EB

2770EAR

2770EBR

2770EAR

2770EBR

D2770EA

D2770EB

D2770EA

D2770EB

2770EAR

2770EBR

2770EAR

2770EBR

DESCRIPTION

TSSOP, Ext. Sense Res., 4.1V Charge Voltage, Lead-Free

TSSOP, Ext. Sense Res., 4.2V Charge Voltage, Lead-Free

DS2770AE+ on Tape and Reel, Lead-Free

DS2770BE+ on Tape and Reel, Lead-Free

TSSOP, 25mΩ Sense Res., 4.1V Charge Voltage, Lead-Free

TSSOP, 25mΩ Sense Res., 4.2V Charge Voltage, Lead-Free

DS2770AE+025 on Tape and Reel, Lead-Free

DS2770BE+025 on Tape and Reel, Lead-Free

TSSOP, Ext. Sense Res., 4.1V Charge Voltage

TSSOP, Ext. Sense Res., 4.2V Charge Voltage

DS2770AE on Tape and Reel

DS2770BE on Tape and Reel

TSSOP, 25mΩ Sense Res., 4.1V Charge Voltage

TSSOP, 25mΩ Sense Res., 4.2V Charge Voltage

DS2770AE-025 on Tape and Reel

DS2770BE-025 on Tape and Reel

DESCRIPTION (CONTD.)

The DS2770 provides a unique ID, a digital temperature sensor, an analog-to-digital converter (ADC) that

measures battery voltage and current, an integrated current accumulator that keeps a running total of all

current entering and leaving the battery, an elapsed time meter, NV memory for storage of important

parameters, and an integrated charge controller supporting rechargeable lithium (including lithium-ion

and lithium-ion polymer) and nickel metal hydride (NiMH) batteries. Current measurement can be

accomplished through the use of an integrated 25mW sense resistor or through an external sense resistor.

The resolution of the current, voltage, and temperature measurements is sufficient for process monitoring

applications such as battery-charge control and safety. The charge-control technique is user-selectable to

support either pulse charge for rechargeable lithium or dT/dt termination for NiMH. Additionally,

programmable charge timers and low-battery recovery are provided for safety and convenience.

Information is sent to/from the DS2770 over a 1-Wire interface so that only one wire (and ground) needs

to be connected from a processor to a DS2770. This means that DS2770-equipped battery packs need

only four output connectors: battery power, charge source, ground, and the 1-Wire interface. Each device

has a factory-programmed 64-bit net address that allows it to be individually addressed by the host

system.

Two types of memory are provided on the DS2770 for battery information storage: lockable EEPROM

and SRAM. EEPROM memory saves important battery data in true NV memory that is unaffected by

severe battery depletion, accidental shorts, or ESD events and becomes ROM when locked to provide

additional security for unchanging battery data. SRAM provides inexpensive storage for temporary data.

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