A4001 AITSEMI | Alldatasheet
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AiT Semiconductor Inc. www.ait-ic.com A4001 BATTERY MANAGEMENT ONE CELL LITHIUM-ION/POL YMER BATTERY PROTECTION IC REV2.0 - JUN 2014 RELEASED, APR 2019 UPDATED - - 1 - DESCRIPTION FEATURES The A4001 battery protection IC is designed to protect lithium-ion/polymer battery from damage or degrading the lifetime due to overcharge, over discharge, and/or overcurrent for one -cell lithium-ion polymer battery powered systems, s uch as cellular phones The ultra-small package and less required external components make it ideal to integrate the A4001 into the limited space of battery pack. The accurate 50mV overcharging detection voltage ensures safe and full utilization charging. T he very low standby current drains little current from the cell while in storage The A4001 is available in SOT-26 package.
ORDERING INFORMATION
SPQ: 3,000pcs/Reel A4001E6R A4001E6VR Note V: Halogen free Package R: Tape & Reel AiT provides all RoHS products Reduction in Board Size due to Miniature Ultra-Low Quiescent Current at 3uA Ultra-Low Power-down Current at 0.1uA Precision Overcharge Protection Voltage 4.3V+50mV for the A4001 Load Detection Function during Overcharge Mode Two Detection Levels for Overcurrent Protection Delay times are generated by internal circuits. No external capacitors required Available in SOT-26 Package APPLICATION One-Cell Lithium-ion Battery Pack Lithium-Polymer Battery Pack TYPICAL APPLICATION
AiT Semiconductor Inc. www.ait-ic.com A4001 BATTERY MANAGEMENT ONE CELL LITHIUM-ION/POL YMER BATTERY PROTECTION IC REV2.0 - JUN 2014 RELEASED, APR 2019 UPDATED - - 2 - PIN DESCRIPTION Top View Pin # Symbol Function
1 OD MOSFET gate connection pin for discharge control
2 CSI Input pin for current sense, charger detect
3 OC MOSFET gate connection pin for charge control
4 NC No connection
5 VDD Power supply, through a resistor (R1)
6 GND Ground pin
AiT Semiconductor Inc. www.ait-ic.com A4001 BATTERY MANAGEMENT ONE CELL LITHIUM-ION/POL YMER BATTERY PROTECTION IC REV2.0 - JUN 2014 RELEASED, APR 2019 UPDATED - - 3 - ABSOLUTE MAXIMUM RATINGS TA= 25℃, unless otherwise noted VDD, Supply Voltage -0.3V~10V OC,CSI, Input Pin Voltage VDD-26V ~ VDD+0.3V OD, Input Pin Voltage -0.3V ~ VDD+0.3V TJ, Operation Junction Temperature 150°C TSTG, Storage Temperature Range -40°C ~+125°C TOPR, Operation Temperature 0°C ~+80°C Stress beyond above listed “Absolute Maximum Ratings” may lead permanent damage to the device. These are stress ratings only and operations of the device at these or any other conditions beyond those indicated in the operational sections of the specifications are not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
AiT Semiconductor Inc. www.ait-ic.com A4001 BATTERY MANAGEMENT ONE CELL LITHIUM-ION/POL YMER BATTERY PROTECTION IC REV2.0 - JUN 2014 RELEASED, APR 2019 UPDATED - - 4 -
ELECTRICAL CHARACTERISTICS
TA = 25℃, unless otherwise noted. Parameter Symbol Conditions Min. Typ. Max. Unit Detection Voltage Overcharge Detection Voltage VCU 4.25 4.30 4.35 V Overcharge Release Voltage VCL 4.05 4.10 4.15 V Overdischarge Detection Voltage VDL 2.30 2.40 2.50 V Overdischarge Release Voltage VDR 2.90 3.00 3.10 V Charger Detection Threshold Voltage VCH -1.2 -0.7 -0.2 V OD pin Output “H” Voltage VDH 3.5 - - V OD pin Output “L” Voltage VDL - - 0.5 V OC pin Output “H” Voltage VCH 3.5 - - V OC pin Output “L” Voltage VCL - - 0.5 V Detection Current Overcurrent Protection Voltage VOI1 120 150 180 mV Short Current Protection Voltage VSHORT VDD=3.6V 1.25 1.35 1.45 V Current Consumption Current Consumption in Normal Operation IOPE VDD=3.9V - 3 6 uA Current Consumption in Power Down IPDN VDD=2.0V - - 0.1 uA Detection Delay Time Overcharge Voltage Detection Delay Time tCU - 80 200 ms Overdischarge Voltage Detection Delay Time tDL - 20 60 ms Overdischarge Current Detection Delay Time *tIOV - 10 20 ms Load Short-Circuiting Detection Delay Time *tSHORT - 5 50 us NOTE1: * The parameter is guaranteed by design
AiT Semiconductor Inc. www.ait-ic.com A4001 BATTERY MANAGEMENT ONE CELL LITHIUM-ION/POL YMER BATTERY PROTECTION IC REV2.0 - JUN 2014 RELEASED, APR 2019 UPDATED - - 5 - DETAILED INFORMATION Functional Description Selection of external control MOSFET Because the overcurrent protection voltage is preset, the threshold current for overcurrent detection is determined by the turn -on resistance of the charge and discharge control MOSFETs can be determined by the equation: R ON=VOIP/(2 x I T)(IT is the overcurrent threshold current). For example, if the overcurrent threshold current IT is designed to be 3A, the turn -on resistance of the external control MOSFET must be 25mΩ. Be aware that turn -on resistance of the MOSFET changes with temperature variation due to heat dissipation. It changes with the voltage between gate and source as well. (Turn -on resistance of MOSFET increases as the voltage between gate and source decrea ses). As the turn -on resistance of the external MOSFET changes, the design of the overcurrent threshold current changes accordingly. Suppressing the Ripple and Disturbance from Charger To suppress the ripple and disturbance from charger, connecting R1 and C1 to VCC is recommended. Protection the CSI pin R2 is used for latch -up protection when charger is connected under overdischarge condition and overstress protection at reverse connecting of a charger
AiT Semiconductor Inc. www.ait-ic.com A4001 BATTERY MANAGEMENT ONE CELL LITHIUM-ION/POL YMER BATTERY PROTECTION IC REV2.0 - JUN 2014 RELEASED, APR 2019 UPDATED - - 6 - TIMING CHART Overcharge Condition-> Load Discharging-> Normal Condition
AiT Semiconductor Inc. www.ait-ic.com A4001 BATTERY MANAGEMENT ONE CELL LITHIUM-ION/POL YMER BATTERY PROTECTION IC REV2.0 - JUN 2014 RELEASED, APR 2019 UPDATED - - 7 - Overdischarge Condition->Charging by a Charger->Normal Condition
AiT Semiconductor Inc. www.ait-ic.com A4001 BATTERY MANAGEMENT ONE CELL LITHIUM-ION/POL YMER BATTERY PROTECTION IC REV2.0 - JUN 2014 RELEASED, APR 2019 UPDATED - - 8 - Over Current Condition->Normal Condition
AiT Semiconductor Inc. www.ait-ic.com A4001 BATTERY MANAGEMENT ONE CELL LITHIUM-ION/POL YMER BATTERY PROTECTION IC REV2.0 - JUN 2014 RELEASED, APR 2019 UPDATED - - 9 -
PACKAGE INFORMATION
Dimension in SOT-26 (Unit: mm) Symbol Millimeters Inches Min Max Min Max A 1.050 1.250 0.041 0.049 A1 0.000 0.100 0.000 0.004 A2 1.050 1.150 0.041 0.045 b 0.300 0.500 0.012 0.020 c 0.100 0.200 0.004 0.008 D 2.820 3.020 0.111 0.119 E1 1.500 1.700 0.059 0.067 E 2.650 2.950 0.104 0.116 e 0.950(BSC) 0.037(BSC) e1 1.800 2.000 0.071 0.079 L 0.300 0.600 0.012 0.024 θ 0° 8° 0° 8°
AiT Semiconductor Inc. www.ait-ic.com A4001 BATTERY MANAGEMENT ONE CELL LITHIUM-ION/POL YMER BATTERY PROTECTION IC REV2.0 - JUN 2014 RELEASED, APR 2019 UPDATED - - 10 - IMPORTANT NOTICE AiT Semiconductor Inc. (AiT) reserves the right to make changes to any its product, specifications, to discontinue any integrated circuit product or service without notice, and advises its cust omers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current. AiT Semiconductor Inc. 's integrated circuit products are not designed, intended, authorized, or warranted to be suitable for use in life support applications, devices or systems or other critical applications. Use of AiT products in such applications is understood to be fully at the risk of the customer. As used herein may involve potential risks of de ath, personal i njury, or server property, or environmental damage. In order to minimize risks associated with the customer's applications, the customer should provide adequate design and operating safeguards. AiT Semiconductor Inc . assumes to no liability to customer pr oduct design or application support. AiT warrants the performance of its products of the specifications applicable at the time of sale.