DW01C FS | Alldatasheet

Document overview

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Technical content

Features

Reduction in Board Size due to Miniature Package SOT-23-6. Ultra-Low Quiescent Current at 2μA (Vcc=3.5V). Precision Overcharge Protection V oltage (4.30V ± 50mV) Over-discharge Protection voltage between (2.40V ± 100mV) Over-current Protection voltage between (0.15V ± 30mV) Load Detection Function during Overcharge Mode. Two Detection Levels for Overcurrent Protection. -40°C to +85°C operating temperature range

Applications

Protection to One-Cell Lithium-Ion /Lithium-Polymer Battery Pack Pin Configuration Pin Name Pin Number Pin Function DO 1 Discharge control output terminal VM 2 Charge/discharge current detection input CO 3 Charge control output terminal NC 4 Not connected VDD 5 Power input VSS 6 Power ground terminal 2 4

  1. 03. 26 2/8 SEMICO NDUCTOR TECHNICAL DATA DW01C Revision No : 3 Block Diagram Typical Application Battery MOS FET : FTK8810L or FTK8810
  1. 03. 26 3/8 DW01C Revision No : 0 Absolute Maximum Rating (GND=0V, Ta=25°C unless otherwise specified)

Electrical Characteristics

(Ta=25°C unless otherwise specified) Parameter Symbol Testing Conditions Min. Typ. Max. Unit Supply Voltage VCC --- 1.5 --- 9.0 V Supply Current ICC VCC =3.5V 2.0 6.0 μA Overcharge Protection Voltage VOCP --- 4.25 4.30 4.35 V Overcharge Release Voltage VOCR --- 4.05 4.10 4.15 V Over-discharge Protection Voltage VODP --- 2.30 2.40 2.50 V Over-discharge Release Voltage VODR --- 2.90 3.00 3.10 V Over current Protection Voltage VOI1 --- 0.12 0.15 0.18 V Short circuit Protection Voltage VOI2 VCC =3.6V 0.80 1.30 1.75 V Over current Reset Resistance RSHORT VCC =3.6V 50 100 150 ㏀ Charger Detection Threshold Voltage VCH --- -0.8 -0.5 -0.2 V Overcharge Delay Time TOC VDD=3.6V~4.4V --- 80 200 mS Over-discharge Delay Time TOD VDD=3.6V~2.0V --- 40 120 mS Overcurrent Delay Time (1) TOI1 VCC =3.6V 5 10 20 mS Overcurrent Delay Time (2 TOI2 VCC =3.6V --- 50 120 mS OD Pin Output “H” Voltage VOH1 --- VCC-0.1 VCC-0.02 V OD Pin Output “L” Voltage VOL --- 0.1 0.5 V OC Pin Output “H” Voltage VOH2 --- VCC-0.1 VCC-0.02 V OC Pin Output “L” Voltage VOL2 --- 0.1 0.5 V Parameter Symbol Rating Unit V y l p p u s r e w o P DD -0.3～10 V V e g a t l o v t u p n I n i p M V M V DD-28 to VDD +0.3 V V e g a t l o v n i p t u p t u o C OCO V DD-28 to VDD+0.3 V V e g a t l o v n i p t u p t u o D ODO V DD-0.3 to VDD+0.3 V P n o i t a p i s s i D r e w o P D 625 mW T e r u t a r e p m e T g n i t a r e p Oopr -40 to +85 ℃ T e r u t a r e p m e T e g a r o t Sstg -55 to +125 ℃ T e r u t a r e p m e T n o i t c n u JJ 150 ℃

  1. 03. 26 4/8Revision No : 0 DW01C Description of Operation 1. Normal Operation status The DW01C will run in normal operation status when the battery voltage is in the range from over discharge protection voltage (VODP) to overcharge protection voltage (V OCP), and the CS pin voltage is in the range from the Charger Detection Threshold Voltage (V CH) to Over cu rrent Protection Voltage (V OI1), Under this status, the chargi ng MOSFET (M2) and discharging MOSFET (M1) are turned on so that charging and discharging can be carried out normally. 2. Overch arge status When the battery voltage becomes higher than the overcharge protection voltage (V OCP) during charging in the normal status and detection continues for the overcharge delay time (T OC) or longer, the charging MOSFET (M2) will be turned off. The overcharge status can be released in two cases: (1) In the case of battery self-discharge, when the battery voltage (V CC) < Overcharge Release Voltage (V OCR), the charging MOSFET (M2) is turned on and return to the normal status. (2) In the case when the charger is removed and the load is co nnected, when the battery voltage (VCC) is in the range from over discharge release voltage (V OCR) to overcharge protection voltage (V OCP) and the V CS pin voltage is higher than Over current Protection Voltage (VOI1), the charging MOSFET (M2) is turned on and return to normal status. 3. Over discharge status When the battery voltage becomes lower than the over discharge protection voltage (V ODP) duri ng discharging in the normal status and detection continues for the over discharge delay time (T OD) or lo nger, the discharging MOSFET (M1) will be turned off. 4. Power-down mode after Over discharge When over discharge occurs, the DW01C will enter into power-down m ode, turning o ff all the timing generation and detection circuitry to reduce the quiescent cu rrent to 0.1 μA (VCC=2.0V). At the same time, the CS pin is pull -up to V CC through an i nternal resistor. 5. Release from power-down mode When the battery is in the over discharge status is connected to a charger, and provided that the CS pin voltage is lower than the Charger Detection Threshold Voltage (V CH), the DW01C will release from power-down m ode and turns on the discharging MOSFET (M1) when the battery voltage reaches the over discharge protection voltage (V ODP ) or higher. 6. Overcurrent / short circuit Protection In the normal status, when t he discharge current is too large, the CS pin voltage is higher than either VOI1 or VOI2, and c ontinues the
  1. 03. 26 5/8 DW01C Revision No : 0 status longer than either TOI1 or TOI2, the DW01C will turn o ff the discharging MOSFET (M1) and enter to overcurrent/short circuit status. 7. Release from overcurrent / short circuit status Under the overcurrent / short-circuit status, the DW01C will turn on the discharging MOSFET (M1) and restore to normal operation status when the CS pin voltage is less than V OI1 and either the load has been removed or the impedance between BATT + and BATT- is >500KΩ. Note: When the battery is installed to the protection circuit for the first time, the circuit may not enter into normal opera tion status, which causing the battery not able to discharge. When this phenomenon happens, simply short the CS to GND, the circuit will be back to normal. Timing Diagram Overcharge status → Load Discharging → Normal Operation status
  1. 03. 26 6/8 DW01C Revision No : 0 Over discharge Status → Charging by a Charger → Normal Operation Status
  1. 03. 26 7/8 DW01C Revision No : 0 Over Current Status → Normal Operation Status
  1. 03. 26 8/8 DW01C Revision No : 0 Package Dimensions