DS2726G+ Maxim Integrated Products, DS2726G+ Datasheet

IC PROT LI+ 5-10CELL 32-TQFP

DS2726G+

Manufacturer Part Number
DS2726G+
Description
IC PROT LI+ 5-10CELL 32-TQFP
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of DS2726G+

Function
Over/Under Voltage Protection
Battery Type
Lithium-Ion (Li-Ion)
Voltage - Supply
5 V ~ 50 V
Operating Temperature
-20°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
32-TQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The DS2726 provides full charge and discharge protection
for 5- to 10-cell lithium-ion (Li+) battery packs. The protec-
tion circuit monitors individual cell voltages to detect over-
voltage and undervoltage conditions. Protection against
discharge overcurrent and short-circuit current is provided
with user-selectable thresholds using external resistors.
P-channel protection FETs are employed high side and
driven from on-chip 10V FET drivers. Cell balancing can
be enabled to ensure that all cells are equally charged.
19-5482; Rev 3; 8/10
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Power Tools
Electric Bikes
Home Appliances
Simplified Typical Application
SLEEP
V
PKP+
PKP-
IN
V
CC
V
SEL0
SEL1
OVS0
OVS1
CBS0
CBS1
CBCFG
SLEEP
CSCD
RSC
RDOC
CDOCD
________________________________________________________________ Maxim Integrated Products
CC
PKP
CC
General Description
DS2726
SNS
GND
5-Cell to 10-Cell Li+ Protector with
Applications
DC
V
IN
V10
V09
V08
V07
V06
V05
V04
V03
V02
V01
V00
Circuit
♦ Complete Protection for 5-Cell to 10-Cell Li+ Packs
♦ Pin Programmable for 5 to 10 Cells
♦ Internal Cell-Balancing Circuit, Shunts Up to 300mA
♦ Pin-Programmable V
♦ Pin-Programmable Cell-Balance Voltage
♦ Overdischarge Current and Short-Circuit Current
♦ Overdischarge Current and Short-Circuit Current
♦ Low Power Consumption: 60µA (typ)
♦ Low Shutdown Power Consumption: 5µA (typ)
♦ 7mm x 7mm, 32-Pin TQFN Lead-Free Package
+ Denotes a lead(Pb)-free/RoHS-compliant package.
T&R = Tape and reel.
* EP = Exposed pad.
Pin Configuration appears at end of data sheet.
DS2726G+
DS2726G+T&R
Set with External Resistors
Timeout Delay Set with External Capacitors
PART
-20°C to +85°C
-20°C to +85°C
TEMP RANGE
Cell Balancing
Ordering Information
OV
Threshold
PIN-PACKAGE
32 TQFN-EP*
32 TQFN-EP*
Features
1

Related parts for DS2726G+

DS2726G+ Summary of contents

Page 1

... Timeout Delay Set with External Capacitors ♦ Low Power Consumption: 60µA (typ) ♦ Low Shutdown Power Consumption: 5µA (typ) ♦ 7mm x 7mm, 32-Pin TQFN Lead-Free Package Circuit PART DS2726G+ DS2726G+T& Denotes a lead(Pb)-free/RoHS-compliant package. IN V10 T&R = Tape and reel Exposed pad. ...

Page 2

Li+ Protector with Cell Balancing ABSOLUTE MAXIMUM RATINGS Voltage Range on V00–V10, PKP, RDOC, RSC Pins Relative to GND .....................-0.3V to +60V Voltage Range on DC Pin Relative Voltage Range on CC Pin Relative ...

Page 3

Li+ Protector with DC ELECTRICAL CHARACTERISTICS (continued -20°C to +85°C.) A PARAMETER SYMBOL Output High Output High: CC Driver Current Output Low Output Low: DC Driver Current Output High ...

Page 4

Li+ Protector with Cell Balancing ELECTRICAL CHARACTERISTICS: PROTECTION CIRCUIT (continued 0°C to +50°C.) A PARAMETER SYMBOL Overvoltage Delay Undervoltage Delay Discharge Overcurrent Delay t Short-Circuit Delay Charger-Detect Threshold PKP VIN ...

Page 5

Li+ Protector with (T = +25°C, unless otherwise noted ACCURACY vs. TEMPERATURE 0.009 0.007 0.005 0.003 0.001 -0.001 -0.003 -0.005 -0.007 -0.009 -40 - TEMPERATURE (°C) DISCHARGE OVERCURRENT DELAY (CDOCD = 1000pF, ...

Page 6

Li+ Protector with Cell Balancing PKP+ PKP 10V REG SEL0 SEL1 OVS0 OVS1 CBS0 CBS1 CBCFG SLEEP RSC V IN CSCD RDOC CDOCD PKP- Figure 1. Block Diagram 6 _______________________________________________________________________________________ ...

Page 7

Li+ Protector with PIN NAME Short-Circuit Voltage Threshold. The resistor from this pin to the positive terminal of the cell stack 1 RSC selects the threshold voltage for a short-circuit condition in the discharge direction. Discharge Overcurrent ...

Page 8

Li+ Protector with Cell Balancing PIN NAME Sense Input. Connect to the drains of the charge and discharge FETs. Used as a voltage reference for 29 SNS detecting short-circuit and discharge overcurrent conditions. Charge Control Output. CC ...

Page 9

Li+ Protector with Detailed Description The DS2726 provides the protection features for a 5-cell to 10-cell Li+ battery pack. The Li+ protection cir- cuit allows for pin-configured selection of OV threshold and the cell-balancing threshold. DOC and ...

Page 10

Li+ Protector with Cell Balancing Li+ Protection Conditions Overvoltage, OV. If any cell voltage (V the overvoltage threshold for a period longer than OV overvoltage delay the DS2726 shuts off the OVD external ...

Page 11

Li+ Protector with 9 CELLS 8 CELLS V10 V10 V09 V09 V08 V08 V07 V07 V06 V06 V05 V05 V04 V04 V03 V03 V02 V02 V01 V01 V00 V00 Figure 4. Cell Bypassing Connection Configuration for Number ...

Page 12

Li+ Protector with Cell Balancing Configuration of Overvoltage The DS2726 allows the OV threshold to be set using the overvoltage select pins. The OV threshold is configured using the OVS0 and OVS1 pins according to Table 3. ...

Page 13

Li+ Protector with Setting the Short-Circuit Threshold and Delay Time The DS2726 allows the selection of a short-circuit cur- rent threshold. This threshold is set using a resistor from the RSC pin to the positive terminal of ...

Page 14

Li+ Protector with Cell Balancing Measurement Sequence The period with which the DS2726 measures voltages is a function of the discharge overcurrent delay time Figure 5 illustrates the measurement sequence. DOCD One measurement period: 4 ...

Page 15

Li+ Protector with Pin Configuration TOP VIEW V09 25 V10 DS2726 29 SNS N. PKP ...

Page 16

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2010 Maxim Integrated Products ...

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