AAT3680 Advanced Analogic Technologies, AAT3680 Datasheet
AAT3680
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AAT3680 Summary of contents
Page 1
... LED. The battery charge status output is a serial interface which may also be read by a system microcontroller. The AAT3680 is available in an 8-pin MSOP or 12- pin TSOPJW package, specified over -20 to 70°C range. Typical Application ...
Page 2
... Leave this pin floating for normal trickle charge current (10% of full charge current). To enter microcontroller fast-read status, pull this pin high during power-up. BAT BAT 8 CSI NC CSI 7 T2X DRV T2X 6 VSS DRV 5 AAT3680 TSOPJW-12 (Top View ...
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... Description V Operation Input Voltage P I DRV Pin Sink Current DRV T Ambient Temperature Range 3680.2003.4.0.91 Lithium-Ion Linear Battery Charge Controller (T =25°C unless otherwise noted Conditions AAT3680 Value Units - -0.3 to 5 -40 to 150 °C 300 °C ...
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... V Over-voltage Protection Threshold OVP V Over-current Protection Threshold OCP Note 1: The AAT3680 output charge voltage is specified over 0° to 50°C ambient temperature; operation over -20 to 70°C is guaranteed by design. 4 Lithium-Ion Linear Battery Charge Controller (V = 4.5V to 15V -20 to 70°C unless otherwise noted. Typical ...
Page 5
... TS pin, must be within the proper window for safe charging. When these con- ditions have been met, and a battery is connected to the BAT pin, the AAT3680 checks the state of the battery. If the cell voltage is below V AAT3680 begins preconditioning the cell. This is performed by charging the cell with 10% of the pro- grammed constant-current amount ...
Page 6
... Either of two possible conditions will bring the IC out of sleep mode: the battery voltage at the BAT pin drops below V (recharge threshold voltage) or the AAT3680 is reset by cycling the input supply through the power-on decreases to sequence. Falling below V is time to initiate a new charge cycle ...
Page 7
... Events such as an input supply interrup- tion or under voltage, removal and replacement of the battery under charge or charging a partially drained battery are all possible. The AAT3680 will monitor the battery voltage and automatically resume charging in the appropriate mode based upon the measured bat- tery cell voltage ...
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... OFF Figure 2: LED Display Output An additional feature is the Output Status for Battery Not Detected state. When the AAT3680 senses there is no battery connected to the BAT pin, the STAT pin cycles for two periods, then remains off for two periods. resistor. If the When in High Speed Data Reporting, the AAT3680 will only trickle charge at the 2x trickle charge level ...
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... IC including several protection features. In addition to battery temperature monitor- ing, the IC constantly monitors for over-current and over-voltage conditions over-current situation occurs, the AAT3680 latches off the pass device to prevent damage to the battery or the system, and enters shutdown mode until the over-current event is terminated. ...
Page 10
... Applications Information Choosing an External Pass Device (PNP or PMOS) The AAT3680 is designed to work with either a PNP transistor or P-Channel Power MOSFET. Selecting one or the other requires looking at the design tradeoffs including performance versus cost issues. Refer to the following design guide for selecting the proper device: ...
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... I CHARGE(REG where V A(MAX) required: vided by the AAT3680 sense resistor DRV pin, and V (assuming 10% tolerance on the 5V supply). Choose a MOSFET device with sufficiently low V device will conduct the desired I 6. Calculate the worst case maximum allowable R DS(ON) ) voltage rating ...
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... If the AAT3680 used in a system with an external power supply source, such as a typical wall adaptor, then a C 10µF should be used. A larger input capacitor in this application will minimize switching or power bounce effects when the power supply is " ...
Page 13
... OUT or more would prevent the operation of this mode. Reverse Current Blocking Diode Bi-Polar Circuit Application When using the AAT3680 with a PNP transistor, a reverse-blocking diode is not required because there is no current path from BAT advisable to still place a blocking diode between the bipolar transistor collector and the BAT pin connection to the circuit output ...
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... Rectifier Diodes Any general purpose rectifier diode can be used with the AAT3680 application circuit in place of a higher cost Schottky type diode. The design trade- off is a rectifier diode has a high forward voltage drop. V range of 0 ...
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... PCB Layout For the best results recommended to physi- cally place the battery pack as close as possible to the AAT3680's BAT pin. To minimize voltage drops in the PCB, keep the high current carrying traces Figure 6: AAT3680 Demo Board Silk Screen / Assembly Drawing 3680.2003.4.0.91 Lithium-Ion Linear Battery Charge Controller adequately wide ...
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... Various 1206 MuRata Mountain Switch 1206 MuRata 1206 MuRata 0805 Various MSOP-8 AnalogicTech 1206 Various SMA TSC TO-252 Various AAT3680 Part Number LRC1206-01-R200F 10JS001 GRM42-6X5R75K10 GRM42-6X5R106K16 AAT3680IKS-4.2 LL5817 FZT788B Part Number LRC1206-01-R200F 10JS001 GRM42-6X5R75K10 GRM42-6X5R106K16 AAT3680IKS-4.2 LL5817 Various 3680.2003.4.0.91 ...
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... MSOP-8 TSOPJW-12 TSOPJW-12 TSOPJW-12 TSOPJW-12 Package Information PIN 1 0.075 0.075 3680.2003.4.0.91 Lithium-Ion Linear Battery Charge Controller Package Marking 4.1V 4.2V 8.2V 8.4V 4.1V 4.2V 8.2V 8.4V MSOP8 1.95 BSC 0.254 BSC 3.00 0. 0.65 BSC 0.30 0.08 AAT3680 Part Number (Tape and Reel) AAT3680IKS-4.1-T1 AAT3680IKS-4.2-T1 AAT3680IKS-8.2-T1 AAT3680IKS-8.4-T1 AAT3680ITP-4.1-T1 AAT3680ITP-4.2-T1 AAT3680ITP-8.2-T1 AAT3680ITP-8.4- 0.60 0.20 0.155 0.075 17 ...
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... BSC 0.50 BSC 0.50 BSC 0.50 BSC 0.50 BSC 3.00 0.10 Advanced Analogic Technologies, Inc. 830 E. Arques Avenue, Sunnyvale, CA 94085 Phone (408) 737-4600 Fax (408) 737-4611 18 Lithium-Ion Linear Battery Charge Controller TSOPJW-12 + 0.10 0.20 - 0.05 7 NOM 4 4 0.055 0.045 0.010 AAT3680 0.04 REF 0.45 0.15 2.75 0.25 3680.2003.4.0.91 ...