SKCL3130ME SKTECHNOLGY | Alldatasheet
Document overview
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- PDF pages: 11
Technical content
Features
Applications
Notes： (1) The chip powe r consumption shall not exceed the maximum power consumed by the package. (2) This prod uct has anti-static protection function, but do not exceed the maximum capacity of the prod uct to withstand static electricity. T ypical Application 1 o f 11REV.08 Marking Marking: 3130
PinNumber PinName PinDescription 1 VT Te st pin 2 GND Groun d, connect the negative terminal of the battery to this pin. 3 VDD Power Suppl y 4、5 VM The negative terminal of the charger. The internal FET switch connects this terminal to GND. P i n n i n g 2 4 SKCL3130ME Parameter Symbol V alue Unit VDD input pin voltage VIN -0.3 to +6.0 V VM input pin voltage VVM -6.0 to +10 V Power Dissipation PD 400 mW Maxi mum Junction Temperature TJ 125 Lead Temp erature TL 300 Operatin g Junction Temperature Topr -40 to +85 ℃ Storage Tem perature Tstg -55 to +150 ℃ Package Thermal Resistance RθJA 250 ℃/W RθJc 130 ℃/W ESD ESD 2000 V Absolute Maximum Ratings(Ta=25 ℃) 2 o f 11REV.08
Condition Min Typ Max Unit Overcha rge Detection Voltage VCU 4.25 4.30 4.35 V Overcha rge Release Voltage VCL 4.05 4.10 4.15 V Over discharge Detection Voltage VDL 2.30 2.40 2.50 V Over discharge Release Voltage VDR 2.90 3.00 3.10 V Char ger Detection Voltage VCHA -0.12 V Over discharge Current1 Detection IIOV 1 Vdd=3.5V 3.0 A Load Sho rt-Circuiting Detection ISHORT Vdd=3.5V 12 A Curr ent Consumption in Normal Operation IOPE Vdd=3.5V，VM=0V 2.80 μA Curr ent Consumption in power Down IPDN V dd=2V,VM floating 1.50 6.0 μA Equivale nt FET on Resistance RDS Vdd=3.6V，IVM=1A 65 m Ω Over Tempe rature Protection TSHD+ 120 ℃ Over Tempe rature Recovery Degre e TSHD- 100 ℃ Overcha rge Voltage Detection Delay Time TCU VDD=3.6V~4. 4V 128 ms Over discharge Voltage Detection Delay Time TDL VDD=3.6V~2. 0V 32 ms Over discharge Current1 Detection Delay Time TIOV1 VDD=3.6V 8.0 ms Load Sho rt-Circuiting Detection Delay Time TSHORT VDD=3.6V 32 μS Electrical Characteristics( Ta=25℃) SKCL3130ME 3 o f 11REV.08
The SKCL3130ME monitors the voltage and current of a battery and protects it from being damaged due to overcharge voltage, overdischarge voltage, overdischarge current, and short circuit conditions by disconnecting the battery from the load or charger. The peripheral circuit is very simple. The MOSFET is integrated and its RDS(ON) is as low as 65mΩ typical. Normal Operating mode If no exception condition is detected, charging and discharging can be carried out freely. This condition is called the normal operating mode. SKCL3130ME 4 o f 11REV.08
When the battery voltage becomes higher than the overcharge detection voltage (VCU) during charging under normal condition and the state continues for the overcharge detection delay time (TCU) or longer, the SKCL3130ME turns the charging control FET off to stop charging. This condition is called the overcharge condition. The overcharge condition is r eleased in the following two cases: (1) When the battery voltage drops below the overcharge release voltage (VCL), the SKCL3130ME turns the charging control FET on and returns to the norm al condition. (2) When a load is connected and discharging starts, the SKCL3130ME turns the charging control FET on and returns to the normal condition. The release mechanism is as follows: the discharging current flows through an internal parasitic diode of the charging FET immediately after a load is connected and discharging starts, and the VM pin voltage increases about 0.7 V (forward voltage of the diode) from the GND pin voltage momentarily . The SKCL3130ME detects this voltage and releases the overcharge condition. Consequently , in the case that the battery voltage is equal to or lower than the overcharge detection voltage (VCU), the SKCL3130ME returns to the normal condition immediately , but in the case the battery voltage is higher than the overcharge detection voltage (VCU),the chip does not return to the normal condition until the battery voltage drops below the overcharge detection voltage (VCU) even if the load is connected. In addition, if the VM pin voltage is equal to or lower than the overcurrent 1 detection voltage when a load is connected and discharging starts, the chip does not return to the normal condition. Note: If the battery is charged to a voltage higher than the overcharge detection voltage (VCU) and the battery voltage does not drops below the overcharge detection voltage (VCU) even when a heavy load, which causes an overcurrent, is co nnected, the overcurrent 1 and overcurrent 2 do not work until the battery voltage drops below the overcharge detection voltage (VCU). Since an actual battery has, however, an internal impedance of several dozens of mΩ, and the battery voltage drops immediately after a heavy load which causes an overcurrent is connected, the over current 1 and overcurrent 2 work. Detection of load shortcircuiting works regardless of the battery voltage. 5 of 11REV.08 SKCL3130ME Overdischarge Condition When the battery voltage drops below the overdi scharge detection voltage (V DL) during discharging under normal condition and it continues for the overdischarge detection delay time (tDL) or longer, the SKCL3130ME turns the discharging control FET off and stops discharging. This condition is called overdischarge condition. After the discharging control FET is turned off, the VM pin is pulled up by the RVMD resistor between VM and VDD in SKCL3130ME，the current of the chip is reduced to the power-down current (IPDN). This condition is called power-down condition. The VM and VDD pins are shorted by the RVMD resistor. The power-down condition is released when a charger is connected and the potential difference between VM and VDD becomes typical or higher,at this time, the FET is still off. When the battery voltage becomes the overdischarge detection voltage (VDL) or higher (see note), the SKCL3130ME turns the FET on and changes to the normal condition from the overdischarge condition. Note: If the VM pin voltage is no less than the charger detection voltage (VCHA), when the battery under overdischarge condition is connected to a charger, the overdischarge condition is released (the discharging control FET is turned on) as usual, provided that the battery voltage reaches the overdischarge release voltage (VDR) or higher.
When the discharging current becomes equal to or hi gher than a specified value (the VM pin voltage is equal to or higher than the overcurrent detection voltage) during discharging under normal condition and the state continues for the overcurrent detection delay time or longer, the SKCL3130ME turns off the discharging control FET to stop discharging. This condition is ca lled overcurrent condition. (The overcurrent includes overcurrent, or load shortcircuit ing.) The VM and GND pins are shorted internally by the RVMS resistor under the overcurrent condi tion. When a load is connected, the VM pin voltage equals the VDD voltage due to the load. Because of the connecti on between the VM and the GND by the RVMS resistor，when the load is removed, the VM pin goes back to the GND potential since the VM pin is shorted the GND pin with the RVMS resistor. Detecting that the VM pin potential is lower than the overcurrent detection voltage (VIOV1), the IC returns to the normal condition. Abnormal Charge Current Detection If the VM pin voltage drops below the charge r detection voltage (VCHA) during charging under the normal condition and it continues for the overcharge detection delay time (TCU) or longer, the SKCL3130ME turns the charging control FET off and stops charging. This action is called abnormal charge current detection. Abnormal charge current detection is released when the voltage difference between VM pin and GND pin becomes higher than the charger detection voltage (VCHA) by separa ting the charger. Since the 0 V battery charging function has higher priority th an the abnormal charge current detection function, abnormal charge current may not be detected by the product with the 0 V battery charging function while the battery voltage is low. Load Short-circuiting Condition If voltage of VM pin is higher short circuiting protection voltage (VSHORT) and it continues for the tSHORT or longer, the SKCL3130ME will stop discharging and battery is disconnected from load. This status is released when voltage of VM pin is higher than short protection voltage (VSHORT), such as when disconnecting the load. 6 of 11REV.08
This function enables the charging of a connected battery whose voltage is 0V by self-discharge. When connectes to a charger , the dischar ging control FET is off and the c harging current flows through the internal parasitic diode in the discharging control FET. If the battery voltage becomes equal to or higher than the overdischarge release voltage (VDL), the normal condition returns. Notes：(1) Some battery providers do not recommend c harging of completely discharged batteries. Please refer to battery providers before the selection of 0 V battery charging function. (2) The 0V battery charging function has higher priority than the abnormal charge current detection function. Consequently, a produc t with the 0 V battery c harging function charges a batteryand abnormal charge current cannot be detected during the battery voltage is low. (3) Whe n a battery is connected to the IC for the first time, the IC may not enter the normal condition in which discharging is possible. In this case, set the VM pin voltage equal to the GND voltage (short the VM and GND pins or connect a charger) to enter the normal condition. SKCL3130ME T iming Chart Overcharge And Overdischarge Detection 7 o f 11REV.08
11REV.08 SKCL3130ME
T iming Chart Charger De tection Abnormal Charge Detection Notes: (1) Normal condition (2) Overcharge volt age condition (3) Overdischarge voltage condition (4) Overcurrent condition SKCL3130ME 9 o f 11REV.08
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Temperature Profile for IR Reflow Soldering(Pb-Free) SKCL3130ME N o t e : 1.Preheating:150~180 ℃, Time:60~90sec. 2.Peak Temp.:245±5℃, Duration:5±0.5sec. 3. Cooling Speed: 2~10℃/sec. Resist ance to Soldering Heat Test Conditions T emp:260±5 ℃ Time:10±1 sec 11 o f 11REV.08