AAT3686 AAT, AAT3686 Datasheet

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... In the absence of an adapter and with a USB port connected, the battery can also be charged by USB power. Depending on the USB port type, the AAT3686 charge current can be programmed for two separate levels up to 500mA. An optional Charge Reduction Loop is also built in to allow users to charge the battery with available current from a USB port, while keeping the port voltage regulated ...

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Pin Descriptions Pin # (TDFN34-16/ TDFN44-16) Name Type 1 USB In 2 BAT In/Out 3 ADP In 4 GND Ground 5 CHR In/Out ADPP# Out 8 TS In/Out 9 DATA In/Out 10 STAT2 Out 11 STAT1 ...

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... AAT3686 Feature Options Internal Pull-Up Product Resistor on EN Pin AAT3686 No AAT3686-1 Yes Absolute Maximum Ratings Symbol Description V USB, ADP Input Voltage, <30ms, Duty Cycle <10 USB, ADP Input Voltage, Continuous P BAT, USBSEL, USBH, USBL, ADPSET, STAT1, STAT2, ADPP DATA, TS, CT, CHR, EN ...

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... Adapter Charging Transistor R DS(ON)A On Resistance USB Charging Transistor R DS(ON)U On Resistance 1. The AAT3686 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 USB Present Rising Edge ...

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... LOOP_IN T Thermal Loop Exiting Threshold LOOP_OUT T Over-Temperature Shutdown Threshold OVSD 1. The AAT3686 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. 3686.2006.10.1.9 Lithium-Ion/Polymer Battery Charger 1 Conditions AAT3686-1 Only; V ...

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Typical Characteristics I vs. R FASTCHARGE SET 10000 1000 USBL 100 USBH (kΩ) SET Recharge Voltage vs. Temperature 4.140 4.130 4.120 4.110 ADP 4.100 4.090 USBH 4.080 4.070 4.060 4.050 4.040 -50 - Temperature ...

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Typical Characteristics Fast Charge Current vs. Temperature (ADPSET = 8.0kΩ Ω ; USBH = 8.06kΩ) 1100 1080 1060 USBH 1040 1020 1000 980 ADP 960 940 920 900 -50 - Temperature (°C) Charging Current vs. Battery Voltage ...

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Typical Characteristics Fast Charge Current vs. Supply Voltage (USBL; USBL = 40.2kΩ Ω ) 120 V = 3.5V BAT 100 V = 3.3V BAT 3.9V 60 BAT 4.0 4.5 5.0 5.5 Supply Voltage (V) ...

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Typical Characteristics Adapter Mode Supply Current vs. ADPSET Resistor 0.80 0.70 0.60 Constant Current 0.50 0.40 0.30 Pre-Conditioning 0.20 0.10 0. ADPSET Resistor (kΩ Ω ) Counter Timeout vs. Temperature (CT = 0.1µ ...

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... The adapter charge input constant current level can be programmed up to 1.5A for rapid charging appli- cations. In the absence of a high current adapter input source, the AAT3686 can be powered from a USB port V supply. Depending on the USB port BUS ...

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... Charging Operation Regardless of which charge input function is selected (i.e., either the adapter input or USB input), the AAT3686 has four basic modes for the battery charge cycle: pre-conditioning/trickle charge; constant current/fast charge; constant voltage; and end of charge (see Figure 1). Charge Complete Voltage Regulated Current ...

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... Lithium-Ion/Polymer Battery Charger useful in applications where the input supply level may fall below the battery charge or under-voltage lockout level. In such cases where the AAT3686 input voltage drops, the device will enter sleep mode and automatically resume charging once the input supply has recovered from its fault condition. ...

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... AAT3686 system control will always select the adapter input over the USB supply input whenever adapter voltage is present on the ADP pin. The AAT3686 will operate from the adapter input over a 4.0V to 5.5V range. The constant current fast charge current for the adapter input mode is set by the R nected between the ADPSET and ground ...

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... The AAT3686 provides an enable function to con- trol the charger IC on and off. The enable (EN) pin is active high. When pulled to a logic low level, the AAT3686 will be shut down and forced into the sleep state. Charging will be halted regardless of the battery voltage or charging state. When the ...

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... Lithium-Ion/Polymer Battery Charger Protection Circuitry Programmable Watchdog Timer The AAT3686 contains a watchdog timing circuit for the adapter input charging mode. No watchdog tim- ing functions are active for the USB input mode. Typically, a 0.1µF ceramic capacitor is connected between the TC pin and ground. When a 0.1µF ...

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... Status Indicator Display Simple system charging status states can be dis- played using one or two LEDs in conjunction with the STAT1 and STAT2 pins on the AAT3686. These two pins are simple switches to connect the LED cath- odes to ground not necessary to use both dis- play LEDs if a user simply wants to have a single lamp to show " ...

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... Flashing rate depends on output capacitance. 3686.2006.10.1.9 Lithium-Ion/Polymer Battery Charger Table 3: Status LED Display Conditions. Digital Charge Status Reporting The AAT3686 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 F(LED) ...

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... Table 4: Serial Data Report Table. 1.8V to 5.0V R PULL_UP DATA Pin Figure 4: Data Pin Application Circuit. pulse, the AAT3686 status data control will reply the data word back to the system microcontroller after a delay defined by the data report time specification . Upon sens- T PULSE DATA(RPT) ...

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... T > OFF DATA Thermal Considerations The AAT3686 is offered in a 3x4mm TDFN pack- age and a 4x4mm TDFN package, each of which can provide up to 2.7W of power dissipation when it is properly bonded to a printed circuit board and has a maximum thermal resistance of 37°C/W. Many considerations should be taken into account ...

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... If the AAT3686 adapter input used in a sys- tem with an external power supply source, such as a typical AC-to-DC wall adapter, then a C tor in the range of 10µF should be used. A larger ...

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... Figure 5: AAT3686 Evaluation Board Component Side Layout. D4 (b) USB BAV74LT1 D4 (a) ADP BAV74LT1 BAT 10μF 10μF 10μF Figure 8: AAT3686 Evaluation Board Schematic Diagram. 3686.2006.10.1.9 Lithium-Ion/Polymer Battery Charger Figure 6: AAT3686 Evaluation Board Solder Side Layout. ON/OFF USBSEL RED LED R9 1.5K ...

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... AAT3686 Evaluation Board Bill of Materials (BOM) Quantity Description 2 Test Pin 2 Conn Term Block 2.54mm 2POS 1 Conn Term Block 2.54mm 3POS 1 USB 2.0 Receptacle, 5POS 3 Capacitor, Ceramic, 10µF 6.3V 10% X5R 0805 1 Capacitor, Ceramic, 0.1µF 25V 10% X5R 0603 2 Typical Red LED 1 Typical Green LED 1 Switching Diode ...

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... Part Number (Tape and Reel) 1 PHXYY PHXYY SKXYY TDFN34-16 Detail "B" Bottom View Pin 1 Indicator (optional) Option A: Option B: C0.30 (4x) max R0.30 (4x) max Chamfered corner Round corner Detail "A" USB Port/AC Adapter 2 AAT3686IRN-4.2-T1 AAT3686IXN-4.2-T1 AAT3686IXN-4.2-1-T1 0.35 ± 0.10 0.20 MIN 0.075 ± 0.075 Detail "B" 23 ...

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Index Area (D/2 x E/2) Detail "A" 4.00 ± 0.05 Top View 7.5° ± 7.5° 0.05 ± 0.05 Side View All dimensions in millimeters. © Advanced Analogic Technologies, Inc. AnalogicTech cannot assume responsibility for use of any circuitry other than ...