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. SSOP-20-225-0.65 FEATURES * Low current consumption -- Overcharge: 55μA (VCELL=4.4V CON=0V) -- Normal: 27μA (VCELL=3.5V CON=0V) -- Overdischarge: 2μA (VCELL=1.8V CON=0V) APPLICATIONS -- Overdischarge: 0.1μA Max(VCELL=1.0V CON=0V) * 3-cell or 4-cell lithium-ion batteries * Overcharge detection voltage: two types (4.350±0.025V, 4.250±0.025V) * Notebook PC * Electric bicycle *Overcharge detection hysteresis voltage: * Electric tools two types (200±60mV, 8±8mV) * Overdischarge detection voltage: three types(2.3±0.1V, 2.6±0.2V , 2.9±0.1V) * Overdischarge release voltage: two types (3.0±0.15V, 3.0±0.20V) * Overcurrent detection voltage: two types(150±15mV,200±15mV) ORDERING INFORMATION Device Package SA45141SC SA45141SD SA45141SE SSOP-20-225-0.65 SA45141SH Overcharge detect hysteresis voltage （mV） Overdischarge detect voltage （V） Overdischarge release voltage （V） Overcurrent detect voltage （mV） 4.350±0.025 200±60 2.3±0.1 3.00±0.15 150±15 4.350±0.025 200±60 2.6±0.2 3.00±0.20 150±15 4.350±0.025 200±60 2.9±0.1 3.00±0.15 200±15 4.250±0.025 8±8 2.9±0.1 3.00±0.15 200±15 Overcharge detect voltage （V） HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: //www.silan.com.cn REV:1.5 2009.06.05 Page 1 of 10 BLOCK DIAGRAM ABSOLUTE MAXIMUM RATING Characteristics Symbol Ratings Unit Supply Voltage VCC max -0.3~24 V OV Pin Voltage VOV max -0.3~24 V SEL Pin Voltage VSEL max -0.3~24 V CON Pin Voltage VCON max -0.3~24 V Pd 300 mW Tstg -40~125 °C Tamb -20~70 °C Allowable Dissipation Storage Temperature Range Operating Temperature Range ELECTRICAL CHARACTERISTICS (Unless otherwise stated, Tamb=25°C, VCC=V4+V3+V2+V1, VCELL=3.5, CON=GND, SEL=VCC) Characteristics Symbol Test conditions Min. Typ. Max. 4.325 4.350 4.375 4.225 4.250 4.275 Unit SA45141SC Overcharge Detection Voltage VU Tamb= SA45141SD 0°C ~50°C SA45141SE SA45141SH HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: //www.silan.com.cn REV:1.5 V 2009.06.05 Page 2 of 10 Characteristics Overcharge Detection Hysteresis Voltage Overdischarge Detection Voltage Symbol Test conditions SA45141SC,SA45141SD ΔVU VD ,SA45141SE Overdischarge Detection Hysteresis Voltage Overcurrent Detection Voltage Overcurrent Detection Hysteresis Voltage VDF ΔVD VOC Typ. Max. 140 200 260 SA45141SH -- 8 16 SA45141SC 2.20 2.30 2.40 SA45141SD 2.40 2.60 2.80 SA45141SE ,SA45141SH 2.80 2.90 3.00 2.85 3.00 3.15 SA45141SD 2.80 3.00 3.20 SA45141SC 0.45 0.70 0.95 SA45141SD 0.00 0.40 0.8 SA45141SE,SA45141SH -- 0.10 0.35 SA45141SC,SA45141SD 135 150 165 SA45141SE,SA45141SH 185 200 215 -- 20 40 SA45141SC ,SA45141SE , Overdischarge Release Voltage Min. SA45141SH ΔVOC Overcurrent Release Unit mV V V V mV mV Load release: more than 5MΩ Consumption Current (VCC pin) 1 ICC1 VCELL=4.4V -- 55 110 μA Consumption Current (VCC pin) 2 ICC2 VCELL=3.5V -- 27 50 μA Consumption Current (VCC pin) 3 ICC3 VCELL=1.8V -- 2 4 μA Consumption Current(VCC pin) 4 ICC4 VCELL=3.5V CON= VCC -- 12 20 μA Consumption Current (VCC pin) 5 ICC5 VCELL=1.8V CON=VCC -- 1 2 μA Consumption Current (V4 pin) 1 IV41 VCELL=4.4V -- 10 20 μA Consumption Current (V4 pin) 2 IV42 VCELL=3.5V -- 8 15 μA Consumption Current (V4 pin) 3 IV43 VCELL=1.8V -- 2.5 5.0 μA V1 Pin Input Current IV1 VCELL=3.5V -0.3 0 0.3 μA V2 Pin Input Current IV2 VCELL=3.5V -0.3 0 0.3 μA V3 Pin Input Current IV3 VCELL=3.5V -0.3 0 0.3 μA Overcharge Detection dead time tOV COV=0.1μF 0.5 1.0 1.5 s Overdischarge Detection dead time tCDC CDC=0.1μF 0.5 1.0 1.5 s Overcurrent Detection dead time 1 tCOL1 COL=0.001μF 5 10 15 ms Overcurrent Detection dead time 2 tCOL2 COL=0.001μF, -- 1.5 3.0 ms Overcurrent Detection dead time 3 tCOL3 5 10 15 ms 20 -- -- μA 20 -- -- μA -- -- 0.8 V -- -- 0.8 V DCHG Pin Source Current ISODCH DCHG Pin Sink Current DCHG ISIDCH DCHG Pin Output Voltage(High) VTHDCH DCHG Pin Output Voltage(Low) VTHDCL VCC-CS>1.0V COL=0.001μF VCELL=1.8V, SW:A VDCHG=VCC-0.8V VCELL=3.5V, SW:A VDCHG= 0.8V VCC-VDCHG,ISO=20μA SW: B VDCHG-GND, ISI=-20μA SW: B HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: //www.silan.com.cn REV:1.5 2009.06.05 Page 3 of 10 Characteristics Symbol Test conditions Min. Typ. Max. Unit OV Pin Sink Current ISIOV VOV=0.4V 100 -- -- μA OV Pin Leak Current ILKOV VOV=24V -- -- 0.1 μA CON Pin Low Voltage VCONL DCHG=“HIGH” -- -- 0.4 V CON Pin High Voltage VCONH DCHG= “LOW” VCC-0.4 -- -- V CON Pin Current ICON VCELL=3.5V, CON=0.4V -- 1 2 μA SEL Pin Low Voltage VSELL 3 cells -- -- 0.4 V SEL Pin High Voltage VSELH 4 cells VCC-0.4 -- -- V -- 1 2 μA SEL Pin Current ISEL VCELL=3.5V, SEL=0.4V PIN CONFIGURATIONS PIN DESCRIPTION Pin no. Pin name I/O 1 OV 2 NC 3 CS 4 NC O -I -- 5 DCHG O 6 NC 7 CDC 8 COL 9 COV 10 GND ------ 11 SEL I 12 NC -- 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 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: //www.silan.com.cn REV:1.5 2009.06.05 Page 4 of 10 Pin no. Pin name I/O Description Discharge FET ON/OFF pin 13 CON I CON=low: DCHG=low, normal ; CON=high: DCHG=high, discharge prohibited 14 NC 15 V1 16 V2 17 V3 18 V4 19 NC 20 VCC -I I I I --- 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 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 Http: //www.silan.com.cn REV:1.5 2009.06.05 Page 5 of 10 TEST CIRCUIT TIMING CHART Overcharge mode HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: //www.silan.com.cn REV:1.5 2009.06.05 Page 6 of 10 Overdischarge mode Overcurrent mode HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: //www.silan.com.cn REV:1.5 2009.06.05 Page 7 of 10 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 Unit：mm 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