AAT3687IWP-4.2-T1 Advanced Analog Technology, Inc., AAT3687IWP-4.2-T1 Datasheet
AAT3687IWP-4.2-T1
Available stocks
Related parts for AAT3687IWP-4.2-T1
AAT3687IWP-4.2-T1 Summary of contents
Page 1
General Description The AAT3687 BatteryManager is a highly integrat- ed single-cell lithium-ion/polymer battery charger IC designed to operate with AC adapter inputs. It requires a minimum number of external compo- nents. The AAT3687 precisely regulates battery charge voltage and current ...
Page 2
Pin Descriptions Pin # Name Type 1 BAT Out 2 ADP In 3 GND Ground ADPP# Out 6 TS In/Out 7 DATA Out 8 STAT2 Out 9 STAT1 Out 10 CT In/Out 11 N/C 12 ADPSET ...
Page 3
AAT3687 Feature Options Product Trickle Charge AAT3687 AAT3687-1 AAT3687-2 Absolute Maximum Ratings Symbol Description V ADP Input Voltage, <30ms, Duty Cycle <10 ADP Input Voltage, Continuous P V BAT, TS, ADPSET, ADPP#, DATA, CT, EN, STAT1, STAT2 N ...
Page 4
Electrical Characteristics -40°C to +85°C, unless otherwise noted. Typical values are at T ADP A Symbol Description Operation ADP Adapter Voltage Range Adapter Present Indicator Threshold V ADPP Voltage Under-Voltage Lockout (UVLO) V UVLO UVLO ...
Page 5
Electrical Characteristics -40°C to +85°C, unless otherwise noted. Typical values are at T ADP A Symbol Description Logic Control / Protection V Input High Threshold EN(H) V Input Low Threshold EN( Input Current ...
Page 6
Typical Characteristics I vs. R FASTCHARGE 10000 1000 100 (kΩ Ω SET End of Charge Voltage Regulation vs. Temperature 4.242 4.221 4.200 4.179 4.158 -50 - Temperature (° ° C) Preconditioning I vs. ...
Page 7
Typical Characteristics Charging Current vs. Battery Voltage (ADPSET = 8.06kΩ Ω 1.2 1.0 0.8 0.6 0.4 0.2 0.0 2.5 2.9 3.3 3.7 Battery Voltage (V) V vs. Supply Voltage IH EN Pin (Rising) 1.4 1.3 1.2 1.1 ...
Page 8
Typical Characteristics CT Pin Capacitance vs. Counter Timeout 2.0 1.8 1.6 1.4 Precondition Timeout 1.2 1.0 0.8 Precondition + Constant Current Timeout 0.6 or Constant Voltage Timeout 0.4 0.2 0 Time (hours) 8 Lithium-Ion/Polymer Battery Charger ...
Page 9
Functional Block Diagram 4.2V ADPSET ADP Voltage ADPP# Sense STAT1 STAT2 DATA EN Functional Description The AAT3687 is a highly integrated single-cell lithium- ion/polymer battery charger IC designed to operate with standard AC adapter input sources, while requir- ing a ...
Page 10
Preconditioning Trickle Charge Charge Complete Voltage Regulated Current Constant Current Mode Voltage Threshold Trickle Charge and Termination Threshold Figure 1: Current vs. Voltage Profile During Charging Phases. Charging Operation The AAT3687 has four basic modes ...
Page 11
System Operation Flow Chart Output ADPP Power On Reset Yes (AAT3687) Recharge Test No V > V RCH BAT Application Information Adapter Power Input Constant current charge levels up to 1.5A may be programmed by the user when powered from ...
Page 12
ADP pin. The precise charging function of the AAT3687 may be read from the DATA pin and/or status LEDs. Please refer to the Battery Charge Status Indication discussion for further details on data reporting. Thermal ...
Page 13
R SET Figure 2: I vs. R FASTCHARGE Protection Circuitry Programmable Watchdog Timer The AAT3687 contains a watchdog timing circuit to shut down charging functions in the event of a defective ...
Page 14
The TS pin has been specifically designed to source 80μA of current to the thermistor. The volt- age on the TS pin resulting from the resistive load should stay within a window of 335mV ...
Page 15
Digital Charge Status Reporting The AAT3687 has a comprehensive digital data reporting system by use of the DATA pin feature. This function can provide detailed information regarding the status of the charging system. The DATA pin is a bi-directional port ...
Page 16
Timing Diagram SQ SQ PULSE System Reset System Start CK T SYNC Data DATA(RPT) SYNC T > OFF DATA N DATA Report Status 1 Chip Over-Temperature Shutdown. 2 Battery Temperature Fault. 3 Over-Voltage ...
Page 17
Thermal Considerations The AAT3687 is offered in a 3x3mm TDFN pack- age which can provide up to 2.0W of power dissi- pation when it is properly bonded to a printed cir- cuit board and has a maximum thermal resistance of ...
Page 18
Capacitor Selection Input Capacitor In general good design practice to place a decoupling capacitor between the ADP pin and ground. An input capacitor in the range of 1μF to 22μF is recommended. If the source supply is unregulated, ...
Page 19
AAT3687 Evaluation Board Schematic Diagram TermB2 ADP 1 TermB2 GND 2 C1 10μF TermB3 BAT GND 2 C2 10μF 3687.2006.10.1.7 Lithium-Ion/Polymer Battery Charger J1 ON/OFF (TDFN33-12) 0Ω 4 ADPP# EN STAT2 2 ...
Page 20
... Lamp D2 1206LED Chicago Miniature CMD15-21VGC/TR8 Lamp J1 HEADER2MM-3 Sullins R2 0603 Panasonic/ECG R6 0603 Panasonic/ECG R3, R4, 0603 Panasonic/ECG R5, R7 SW1 Switch ITT Industries/ C&K Div U1 TDFN33-12 AnalogicTech AAT3687 Part Number 6821-0-0001-00-00-08-0 277-1274-ND 277-1273-ND 490-1717-1-ND 478-1244-2-ND 6821-0-0001-00-00-08-0 P10KCFCT-ND P8.06KHCT-ND P1.5KCGCT-ND CKN9012-ND AAT3687IWP-4.2 3687.2006.10.1.7 ...
Page 21
... Detail "B" 1.70 ± 0.05 Bottom View Option A: Option B: C0.30 (4x) max R0.30 (4x) max Chamfered corner Round corner Detail "A" AAT3687 Part Number (Tape and Reel) AAT3687IWP-4.2-T1 AAT3687IWP-4.2-1-T1 AAT3687IWP-4.2-2-T1 0.375 ± 0.125 0.3 ± 0.10 0.16 0.075 ± 0.075 0.1 REF Pin 1 Indicator (optional) Detail "B" 2 ...
Page 22
Advanced Analogic Technologies, Inc. AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights, or other intellectual property rights are implied. AnalogicTech reserves ...