DATA SHEET AAT3620: Single Cell Li+ Switch Mode Battery Charger Applications Description The BatteryManager AAT3620 is an ideal solution for charging Digital camcorders high-capacity Li+ batteries. The AAT3620 can supply up to 2.0 A Point of service (POS) charging current with minimal thermal impact to mobile systems Portable DVD players with features such as color display, camera with flash, organizer, video, etc., that requires battery capacity to keep pace with the Portable hand-held solutions power requirements. Portable media players The AAT3620 is a pulse-width modulation (PWM) switch mode/linear charger with high charging efficiency at the full Features constant-current (fast charge) rate. Based on a 1.5 MHz PWM step-down buck converter, the AAT3620 PWM switch mode Input voltage range: 4.3 to 6.0 V controls the constant-current charging mode up to 2.0 A, and Up to 2.0 A charging current capability automatically switches to linear mode charging during the battery 1.5 MHz PWM/linear charger conditioning low level current and the light load end-of-charging current termination region. The full charging rate and the end-of- Over 90% full rate charging efficiency charging current can be programmed with separate external Integrated switching device resistors. A shared charging current indication pin is available for No BAT detect a Coulomb counter. Safety timer Battery charger temperature and charging state are fully monitored for fault conditions. In the event of an over-current, Integrated sense resistor over-voltage, short-circuit or over-temperature failure, the device Built-in reverse blocking feature automatically shuts down. Two status monitor output pins are Battery preconditioning/constant-voltage/constant-current provided to indicate the battery charging status and power source charging mode status through two display LEDs. The AAT3620 also has a no- battery detection feature,No BA, which requires the safety Programmable end-of-charging current timer. 1% constant-voltage mode regulation The AAT3620 is available in a thermally enhanced, space-saving Built-in programmable charging timer 14-pin, 3 mm 3 mm TDFN package. Charging current indication pin A typical application circuit is shown in Figure 1. The pin Over-voltage, over-current, and over-temperature protection configurations are shown in Figure 2. Signal pin assignments and functional pin descriptions are provided in Table 1. Battery over-temperature protection Power-on reset and soft-start Space-saving TDFN (14-pin, 3 mm 3 mm) package (MSL1, 260 C per JEDEC J-STD-020) Skyworks Green products are compliant with all applicable legislation and are halogen-free. For additional information, refer to Skyworks Denition of Green, document number SQ04-0074. Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 201904D Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice October 21, 2013 1 DATA SHEET AAT3620 SINGLE CELL LI+ SWITCH MODE BATTERY CHARGER 4.7 H CS LX VPIN Adapter 100 Battery + BATT Pack VCC BAT 10 F 0.1 F 1 F 22 F AAT3620 Charge Enable EN BATT - PGND CT VCC RT1 0.1 F TEMP TS RT2 STAT1 Charging Status 1 ISET Charge Current Set Charging Status 2 STAT2 Termination Current Set & ITERM GND Charge Current Indicator RTERM RSET tc93 Figure 1. AAT3620 Typical Application Circuit 1 14 VPIN LX 2 13 PGND CS 3 12 GND BAT 11 4 EP VCC TS 5 10 EN TERM 6 9 ISET STAT1 7 8 STAT2 CT t0109 Figure 2. AAT3620 Pinout 14-Pin, 3 mm 3 mm TDFN (Top View) Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 October 21, 2013 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice 201904D