AAT3681 AAT, AAT3681 Datasheet
AAT3681
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AAT3681 Summary of contents
Page 1
... A status monitor output pin is provided to indicate the battery charge status by directly driving an external LED. The AAT3681 is available in a Pb-free, thermally enhanced, space-saving 8-pin 2.0x2.1mm SC70JW package and is specified for operation over the -40°C to +85°C temperature range. ...
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Pin Description Pin # Symbol Type ISET In/Out 3 BAT In/Out 4 ADP Power In 5 STAT Out GND Power Pin Configuration 2 Lithium-Ion/Polymer Battery Charger Function In Enable pin. Logic high enables the ...
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... AAT3681 Feature Options Product AAT3681 AAT3681-1 Absolute Maximum Ratings Symbol Description V ADP Continuous P V BAT, STAT, ISET Operating Junction Temperature Range J T Maximum Soldering Temperature (at Leads) LEAD Thermal Information 2 Symbol Description P Maximum Power Dissipation D θ Maximum Thermal Resistance JA 1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at condi- tions other than the operating conditions specified is not implied ...
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... Charge Termination Threshold Current TERM CH 1. The AAT3681 output charge voltage is specified over the 0° to 70°C ambient temperature range; operation over the -25°C to +85°C temperature range is guaranteed by design. 4 Lithium-Ion/Polymer Battery Charger 1 Conditions Rising Edge Charge Current = 200mA ...
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... V 200 190 180 170 50 75 100 4 USB Port or AC Adapter (AAT3681 Only 5.36kΩ SET R = 8.06kΩ SET R = 16.2kΩ SET R = 31.6kΩ SET 2.9 3.1 3.3 3.5 3.7 3.9 V (V) BAT End of Charge Battery Voltage vs. Supply Voltage R = 8.06kΩ ...
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... Temperature (°C) Operating Current vs. Temperature = 8.06kΩ Ω SET 550 500 450 400 350 300 -50 - Temperature (°C) Preconditioning Charge Current vs. Temperature = 8.06kΩ Ω ; AAT3681 Only) (R SET 20.8 20.6 20.4 20.2 20.0 19.8 19.6 19.4 19.2 -50 - Temperature (°C) 6 Lithium-Ion/Polymer Battery Charger Operating Supply Current vs. Set Resistor ...
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Typical Characteristics Recharging Threshold Voltage vs. Temperature = 8.06kΩ Ω SET 4.18 4.16 4.14 4.12 4.10 4.08 4.06 4.04 4.02 -50 - Temperature (°C) V vs. Supply Voltage IH_ENABLE = 8.06kΩ Ω SET 1.2 ...
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... Charging Operation The AAT3681 has four basic modes for the battery charge cycle: pre-conditioning/trickle charge; con- stant current/fast charge; constant voltage; and end of charge (see Figure 1). (AAT3681-1 does not have trickle charge ...
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... UVLO begin. When these conditions have been met and a battery is connected to the BAT pin, the AAT3681 checks the state of the battery. If the cell voltage is below the preconditioning voltage threshold (V the charge control begins preconditioning the cell. ...
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... Recharge Test V > V RCH BAT 10 Lithium-Ion/Polymer Battery Charger Enable Yes Power Input Voltage V > UVLO Yes Fault Conditions Yes Monitoring OV (AAT3681) Preconditioning Yes Test V > V MIN BAT No Current Phase Test Yes Yes V > BAT No Voltage Phase Test Yes I > ...
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... IC on and off. The enable (EN) pin is internally pulled down. When pulled to a logic high level, AAT3681 is enabled. When left open or pulled to a logic low level, the AAT3681 will be shut down and forced into the sleep state. Charging will be halted regardless of the battery voltage or charging state ...
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... Charge Status Output The AAT3681 provides battery charge status via a status pin. This pin is internally connected channel open drain MOSFET, which can be used to drive an external LED. The status pin can indicate the following conditions: Event Description No battery charging activity Battery charging via adapter ...
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... If the AAT3681 adapter input used in a system with an external power supply source, such as a typical AC-to-DC wall adapter, then the range of 10µF should be used. A larger input ...
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... Figure 7: AAT3681 Evaluation Board Schematic Diagram. Component Part Number U1 AAT3681IJS-T1 R1 Chip Resistor R8 Chip Resistor JP1 Chip Resistor C1 GRM21BR61A106KE19L C2 GRM21BR71A225KA01L JP2 PRPN401PAEN LED1 CMD15-21SRC/TR8 Table 3: AAT3681 Evaluation Board Bill of Materials. 14 Lithium-Ion/Polymer Battery Charger Figure 6: AAT3681 Evaluation Board JP2 AAT3681 GND 2 7 ISET GND 3 6 BAT GND 4 ...
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... Phone (408) 737- 4600 Fax (408) 737- 4611 3681.2007.01.1.2 Lithium-Ion/Polymer Battery Charger Package Marking 1 SC70JW-8 REXYY SC70JW-8 STXYY SC70JW-8 0.225 ± 0.075 0.100 USB Port or AC Adapter Part Number (Tape and Reel) AAT3681IJS-4.2-T1 AAT3681IJS-4.2-1-T1 0.048REF 0.45 ± 0.10 4° ± 4° 2.10 ± 0. ...