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THREE OR FOUR-CELL LI+ BATTERY PROTECTION CIRCUIT
DESCRIPTION
The SA45141 is a three- or four-cell Lithium-Ion Batteries protection circuit. SA45141 protects for Lithium-Ion Batteries. It has functions below: Overcharge detection, Overdischarge detection, Overcurrent detection. When the Lithium-Ion Batteries is in state of overcharge, overdischarge and overcurrent. The IC turns off and on the external MOSFET to protect the batteries.
FEATURES
* Low current consumption -- Overcharge: 55A (VCELL=4.4V CON=0V) -- Normal: 27A (VCELL=3.5V CON=0V) -- Overdischarge: 2A (VCELL=1.8V CON=0V) -- Overdischarge: 0.1A Max(VCELL=1.0V CON=0V) * Overcharge detection voltage: two types (4.3500.025V, 4.2500.025V) *Overcharge detection hysteresis voltage: two types (20060mV, 88mV) * Overdischarge detection voltage: three types(2.30.1V, 2.60.2V , 2.90.1V) * Overdischarge release voltage: two types (3.00.15V, 3.00.20V) * Overcurrent detection voltage: two types(15015mV,20015mV)
SSOP-20-225-0.65
APPLICATIONS
* 3-cell or 4-cell lithium-ion batteries * Notebook PC * Electric bicycle
* Electric tools
ORDERING INFORMATION
Overcharge detect voltage V 4.3500.025 SSOP-20-225-0.65 4.3500.025 4.3500.025 4.2500.025 Overcharge detect hysteresis voltage mV 20060 20060 20060 88 Overdischarge detect voltage V 2.30.1 2.60.2 2.90.1 2.90.1 Overdischarge release voltage V 3.000.15 3.000.20 3.000.15 3.000.15 Overcurrent detect voltage mV 15015 15015 20015 20015
Device
Package
SA45141SC SA45141SD SA45141SE SA45141SH
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
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REV:1.5
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BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATING
Characteristics Supply Voltage OV Pin Voltage SEL Pin Voltage CON Pin Voltage Allowable Dissipation Storage Temperature Range Operating Temperature Range Symbol VCC max VOV max VSEL max VCON max Pd Tstg Tamb Ratings -0.3~24 -0.3~24 -0.3~24 -0.3~24 300 -40~125 -20~70 Unit V V V V mW C C
ELECTRICAL CHARACTERISTICS
(Unless otherwise stated, Tamb=25C, VCC=V4+V3+V2+V1, VCELL=3.5, CON=GND, SEL=VCC)
Characteristics Symbol Test conditions SA45141SC Overcharge Detection Voltage VU Tamb= 0C ~50C SA45141SD SA45141SE SA45141SH 4.225 4.250 4.275 4.325 4.350 4.375 V Min. Typ. Max. Unit
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Characteristics Overcharge Detection Hysteresis Voltage
Symbol VU
Test conditions SA45141SC,SA45141SD ,SA45141SE SA45141SH SA45141SC
Min. 140
Typ. 200
Max. 260
Unit mV
-2.20 2.40 2.80 2.85 2.80 0.45 0.00 -135 185 --
8
2.30 2.60 2.90 3.00 3.00 0.70 0.40 0.10 150 200 20
16
2.40 2.80 3.00 3.15 3.20 0.95 0.8 0.35 165 215 40 mV mV V V V
Overdischarge Detection Voltage
VD
SA45141SD SA45141SE ,SA45141SH SA45141SC ,SA45141SE ,
Overdischarge Release Voltage
VDF
SA45141SH SA45141SD SA45141SC
Overdischarge Detection Hysteresis Voltage Overcurrent Detection Voltage Overcurrent Detection Hysteresis Voltage Overcurrent Release Consumption Current (VCC pin) 1 Consumption Current (VCC pin) 2 Consumption Current (VCC pin) 3 Consumption Current(VCC pin) 4 Consumption Current (VCC pin) 5 Consumption Current (V4 pin) 1 Consumption Current (V4 pin) 2 Consumption Current (V4 pin) 3 V1 Pin Input Current V2 Pin Input Current V3 Pin Input Current Overcharge Detection dead time Overdischarge Detection dead time Overcurrent Detection dead time 1 Overcurrent Detection dead time 2 Overcurrent Detection dead time 3 DCHG Pin Source Current DCHG Pin Sink Current DCHG DCHG Pin Output Voltage(High) DCHG Pin Output Voltage(Low)
VD
SA45141SD SA45141SE,SA45141SH SA45141SC,SA45141SD SA45141SE,SA45141SH
VOC VOC
Load release: more than 5M ICC1 ICC2 ICC3 ICC4 ICC5 IV41 IV42 IV43 IV1 IV2 IV3 tOV tCDC tCOL1 tCOL2 tCOL3 ISODCH ISIDCH VTHDCH VTHDCL VCELL=4.4V VCELL=3.5V VCELL=1.8V VCELL=3.5V CON= VCC VCELL=1.8V CON=VCC VCELL=4.4V VCELL=3.5V VCELL=1.8V VCELL=3.5V VCELL=3.5V VCELL=3.5V COV=0.1F CDC=0.1F COL=0.001F COL=0.001F, VCC-CS>1.0V COL=0.001F VCELL=1.8V, SW:A VDCHG=VCC-0.8V VCELL=3.5V, SW:A VDCHG= 0.8V VCC-VDCHG,ISO=20A SW: B VDCHG-GND, ISI=-20A SW: B 5 20 20 --10 ----15 --0.8 0.8 ms A A V V ---------0.3 -0.3 -0.3 0.5 0.5 5 -55 27 2 12 1 10 8 2.5 0 0 0 1.0 1.0 10 1.5 110 50 4 20 2 20 15 5.0 0.3 0.3 0.3 1.5 1.5 15 3.0 A A A A A A A A A A A s s ms ms
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Characteristics OV Pin Sink Current OV Pin Leak Current CON Pin Low Voltage CON Pin High Voltage CON Pin Current SEL Pin Low Voltage SEL Pin High Voltage SEL Pin Current
Symbol ISIOV ILKOV VCONL VCONH ICON VSELL VSELH ISEL
Test conditions VOV=0.4V VOV=24V DCHG="HIGH" DCHG= "LOW" VCELL=3.5V, CON=0.4V 3 cells 4 cells VCELL=3.5V, SEL=0.4V
Min. 100 --VCC-0.4 --VCC-0.4 --
Typ. ----1 --1
Max. -0.1 0.4 -2 0.4 -2
Unit A A V V A V V A
PIN CONFIGURATIONS
PIN DESCRIPTION
Pin no. 1 2 3 4 5 6 7 8 9 10 11 12 Pin name OV NC CS NC DCHG NC CDC COL COV GND SEL NC I/O Description Overcharge detection output pin Not connected Overcurrent detection input pin Not connected Discharge control FET drive output pin Normal state: DCHG=Low; Overdischarge state: DCHG=High Not connected Overdischarge detection dead time setting pin Overcurrent detection dead time setting pin Overcharge detection dead time setting pin Ground 3 or 4 cell select switch pin SEL=V1 or GND:3 cell ; SEL=Vcc:4 cell Not connected REV:1.5 2009.06.05 Page 4 of 10
O -I -O -----I --
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Pin no. 13 14 15 16 17 18 19 20
Pin name CON NC V1 V2 V3 V4 NC VCC
I/O Discharge FET ON/OFF pin
Description CON=low: DCHG=low, normal ; CON=high: DCHG=high, discharge prohibited Not connected V1 cell positive electrode side ,V2 cell negative electrode side V2 cell positive electrode side ,V3 cell negative electrode side V3 cell positive electrode side ,V4 cell negative electrode side V4cell positive electrode side Not connected Power supply input pin
I -I I I I ---
FUNCTION DESCRIPTION
This IC is a lithium-ion batteries (3-cell or 4-cell) protection IC. It has functions below: Overcharge detection, Overdischarge detection, Overcurrent detection. It controls the batteries charging or discharging by control the external MOSFET off and on. 1. Overcharge mode The battery voltage of either 3 cell batteries or 4 cell batteries goes above overcharge detection voltage. The IC shuts down the charging loop. Dead time can be set by connecting a capacitor. 2. Normal mode When the battery voltage of both 3 cell batteries and 4 cell batteries are above overdischarge detection voltage and below overcharge detection voltage, it can realize the normal charging and discharging function. 3. Overdischarge mode The battery voltage of either 3 cell batteries or 4 cell batteries drops below overdischarge detection voltage. The IC shuts down the discharging loop. Dead time of overdischarge detection can be set by connecting a capacitor. 4. Overcurrent mode The voltage between CS-Vcc goes above overcurrent detection voltage during discharge. The IC shuts down the discharging loop. 5. Discharge FET ON/OFF pin CON CON=low: DCHG=low, normal; CON=high: DCHG=high, discharge prohibited.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
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REV:1.5
2009.06.05 Page 5 of 10
TEST CIRCUIT
TIMING CHART
Overcharge mode
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Overdischarge mode
Overcurrent mode
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
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TYPICAL APPLICATION CIRCUIT
Note:The circuit and parameters are reference only, please set the parameters of the real application circuit based on the real test .
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: //www.silan.com.cn
REV:1.5
2009.06.05 Page 8 of 10
PACKAGE OUTLINE
SSOP-20-225-0.65
Unitmm
Disclaimer: * Silan reserves the right to make changes to the information herein for the improvement of the design and performance without further notice! * All semiconductor products malfunction or fail with some probability under special conditions. When using Silan products in system design or complete machine manufacturing, it is the responsibility of the buyer to comply with the safety standards strictly and take essential measures to avoid situations in which a malfunction or failure of such Silan products could cause loss of body injury or damage to property. * Silan will supply the best possible product for customers!
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: //www.silan.com.cn
REV:1.5
2009.06.05 Page 9 of 10

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