DS2762BE+025/T&R Maxim Integrated Products, DS2762BE+025/T&R Datasheet

IC MON BATT LI-ION HP 16-TSSOP

DS2762BE+025/T&R

Manufacturer Part Number
DS2762BE+025/T&R
Description
IC MON BATT LI-ION HP 16-TSSOP
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of DS2762BE+025/T&R

Function
Battery Monitor
Battery Type
Lithium-Ion (Li-Ion)
Voltage - Supply
2.5 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
16-TSSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
DS2762BE+025/T&R
DS2762BE+025/TR
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.
www.maxim-ic.com
GENERAL DESCRIPTION
The DS2762 high-precision Li+ battery monitor is a
data-acquisition, information-storage, and safety-
protection device tailored for cost-sensitive battery
pack applications. This low-power device integrates
precise
measurement, nonvolatile (NV) data storage, and Li+
protection into the small footprint of either a TSSOP
package or flip-chip package. The DS2762 is a key
component
capacity estimation, safety monitoring, and battery-
specific data storage.
PIN CONFIGURATIONS
1-Wire is registered trademark of Dallas Semiconductor.
TOP VIEW
temperature,
in
(top view – bumps on bottom)
SNS
SNS
SNS
PLS
IS2
CC
DC
DQ
V
applications
CC
1
PLS DC
V
DD
IN
1
1
2
2
2 3
4
5
6
7
8
SNS
PROBE
V
PROBE
FLIP CHIP
PIO
TSSOP
2
SS
voltage,
V
SNS
SS
3
16
15
14
13
12
11
10
9
including
IS1
IS2
DQ
PS
4
V
V
PIO
V
V
V
PS
IS1
IN
DD
SS
SS
SS
A
B
C
D
E
F
and
remaining
High-Precision Li+ Battery Monitor With Alerts
current
1 of 25
FEATURES
§
§
§
§
§
§
§
§
§
§
§
§
§
APPLICATIONS
PDAs
Cell Phones/Smartphones
Digital Cameras
ORDERING INFORMATION
Selector Guide appears at end of data sheet, for additional
options.
DS2762BE+
Li+ Safety Circuit
Overvoltage Protection
Overcurrent/Short-Circuit Protection
Undervoltage Protection
Host Alerted When Accumulated Current or
Temperature Exceeds User-Selectable Limits
0V Battery Recovery Charge
Available in Two Configurations:
Internal 25mW Sense Resistor
External User-Selectable Sense Resistor
Current Measurement
12-Bit Bidirectional Measurement
Internal Sense Resistor Configuration:
External Sense Resistor Configuration:
Current Accumulation:
Internal Sense Resistor: 0.25mAhr LSB
External Sense Resistor: 6.25mVhr LSB
Voltage Measurement with 4.88mV Resolution
Temperature Measurement Using Integrated
Sensor with 0.125°C Resolution
System Power Management and Control
Feature Support
32 Bytes of Lockable EEPROM
16 Bytes of General-Purpose SRAM
Dallas 1-Wire
Device Address
Low-Power Consumption:
Active Current: 60mA typ, 90mA max
Sleep Current: 1mA typ, 2mA max
PART
0.625mA LSB and ±1.9A Dynamic Range
15.625mV LSB and ±64mV Dynamic Range
-20°C to +70°C
TEMP RANGE
®
Interface with Unique 64-Bit
PIN-PACKAGE
16 TSSOP
DS2762
REV: 010906

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DS2762BE+025/T&R Summary of contents

Page 1

GENERAL DESCRIPTION The DS2762 high-precision Li+ battery monitor is a data-acquisition, information-storage, and safety- protection device tailored for cost-sensitive battery pack applications. This low-power device integrates precise temperature, voltage, measurement, nonvolatile (NV) data storage, and Li+ protection into the ...

Page 2

ABSOLUTE MAXIMUM RATINGS Voltage Range on PLS and CC Pin, Relative to V Voltage Range on PIO Pin, Relative to V Voltage Range on Any Other Pin, Relative to V Continuous Internal Sense Resistor Current Pulsed Internal Sense Resistor Current ...

Page 3

ELECTRICAL CHARACTERISTICS: PROTECTION CIRCUITRY (2.5V £ V £ 5.5V 0°C to +50°C PARAMETER Overvoltage Detect Charge Enable Undervoltage Detect Overcurrent Detect Overcurrent Detect Short-Circuit Detect Short-Circuit Detect Overvoltage Delay Undervoltage Delay Overcurrent Delay Short-Circuit Delay Test ...

Page 4

ELECTRICAL CHARACTERISTICS: TEMPERATURE, VOLTAGE, CURRENT (2.5V £ V £ 5.5V -20°C to +50°C PARAMETER Temperature Resolution Temperature Full-Scale Magnitude Temperature Error Voltage Resolution Voltage Full-Scale Magnitude Voltage Offset Error Voltage Gain Error Current Resolution Current Full-Scale ...

Page 5

ELECTRICAL CHARACTERISTICS: 1-WIRE INTERFACE (2.5V £ V £ 5.5V -20°C to +70°C PARAMETER Time Slot Recovery Time Write 0 Low Time Write 1 Low Time Read Data Valid Reset Time High Reset Time Low Presence Detect ...

Page 6

PIN DESCRIPTION PIN SYMBOL FLIP TSSOP CHIP PLS SNS IS2 9 D4 IS1 11, 12 ...

Page 7

Figure 1. Block Diagram 1-Wire DQ INTERFACE AND ADDRESS THERMAL SENSE V MUX IN + IS1 - IS2 PLS PS SNS IS2 DETAILED DESCRIPTION The DS2762 high-precision Li+ battery monitor is a data-acquisition, information-storage, and safety-protection device tailored for cost-sensitive ...

Page 8

Figure 2. Application Example 102 x 2 PACK+ 1kW 150W 150W DATA 102 PACK- NOTE PRESENT FOR EXTERNAL SENSE RESISTOR SNS CONFIGURATIONS ONLY. NOTE PRESENT FOR INTERNAL SENSE RESISTOR SNS-INT CONFIGURATIONS ONLY. 1kW 1kW ...

Page 9

POWER MODES The DS2762 has two power modes: active and sleep. While in active mode, the DS2762 continually measures current, voltage, and temperature to provide data to the host system and to support current accumulation and Li+ safety monitoring. In ...

Page 10

The DS2762 provides a current-limited ( gently charge severely depleted cells. The recovery path is enabled when 0 £ reaches 3V (typ), the DS2762 returns to normal operation, awaiting connection of ...

Page 11

CURRENT MEASUREMENT In active mode, the DS2762 continually measures the current flow into and out of the battery by measuring the voltage drop across a current-sense resistor. The DS2762 is available in two configurations: 1) internal 25mW current-sense resistor and ...

Page 12

CURRENT OFFSET COMPENSATION Current measurement and current accumulation are internally compensated for offset on a continual basis minimizing error resulting from variations in device temperature and voltage. Additionally, a constant bias can be used to alter any other sources of ...

Page 13

PROGRAMMABLE I/O To use the PIO pin as described in this section, the IE bit (bit 2) of the Status Register must be set use the PIO pin as an output, write the desired output value to ...

Page 14

Temperature Interrupt High Threshold Temperature Alarm Low Threshold POWER SWITCH INPUT The DS2762 provides a power control function that uses the discharge protection FET to gate battery power to the system. The PS pin, internally pulled ...

Page 15

Table 2. Memory Map ADDRESS (HEX) 00 Protection Register 01 Status Register 02–06 Reserved 07 EEPROM Register 08 Special Feature Register 09–0B Reserved 0C Voltage Register MSB 0D Voltage Register LSB 0E Current Register MSB 0F Current Register LSB 10 ...

Page 16

OV—Overvoltage Flag. When set to 1, this bit indicates the battery pack has experienced an overvoltage condition. This bit must be reset by the host system. UV—Undervoltage Flag. When set to 1, this bit indicates the battery pack has experienced ...

Page 17

EEPROM REGISTER The format of the EEPROM register is shown in Figure 12. The function of each bit is described in detail in the following paragraphs. Figure 12. EEPROM Register Format BIT 7 BIT 6 EEC LOCK EEC—EEPROM Copy Flag. ...

Page 18

BUS SYSTEM The 1-Wire bus is a system that has a single bus master and one or more slaves. A multidrop bus is a 1-Wire bus with multiple slaves. A single-drop bus has only one slave device. In all ...

Page 19

HARDWARE CONFIGURATION Because the 1-Wire bus has only a single line important that each device on the bus be able to drive it at the appropriate time. To facilitate this, each device attached to the 1-Wire bus must ...

Page 20

NET ADDRESS COMMANDS Once the bus master has detected the presence of one or more slaves, it can issue one of the net address commands described in the following paragraphs. The name of each ROM command is followed by the ...

Page 21

Write Data [6Ch, XX]. This command writes data to the DS2762 starting at memory address XX. The LSb of the data to be stored at address XX can be written immediately after the MSb of address has been entered. Because ...

Page 22

Figure 17. Net Address Command Flow Chart 33h / 39h NO 55h READ MATCH YES MASTER Tx DS2762 Tx BIT 0 FAMILY CODE 1 BYTE DS2762 Tx SERIAL NUMBER 6 BYTES BIT 0 MATCH ? DS2762 Tx CRC 1 BYTE ...

Page 23

I/O SIGNALING The 1-Wire bus requires strict signaling protocols to ensure data integrity. The four protocols used by the DS2762 are as follows: the initialization sequence (reset pulse followed by presence pulse), write 0, write 1, and read data. The ...

Page 24

Figure 19. 1-Wire Write- and Read-Time Slots WRITE 0 SLOT t SLOT t LOW0 DQ DS2762 SAMPLE WINDOW MIN TYP 15ms 15ms READ 0 SLOT t SLOT DQ MASTER SAMPLE WINDOW t RDV LINE TYPE LEGEND: Figure 20. Swap Command ...

Page 25

... Flip-Chip, External Sense Resistor, Tape-and-Reel, 4.35V V TSSOP, External Sense Resistor, 4.275V V TSSOP, External Sense Resistor, 4.35V V DS2762AE on Tape-and-Reel DS2762BE on Tape-and-Reel TSSOP, 25mW Sense Resistor, 4.275V V TSSOP, 25mW Sense Resistor, 4.35V V DS2762AE-025 in Tape-and-Reel DS2762BE-025 in Tape-and-Reel © 2003 Maxim Integrated Products · Printed USA Lead-Free OV , Lead-Free OV , Lead-Free OV , Lead-Free ...

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