DATA SHEET AAT3693: 1.6 A Li-Ion/Polymer Battery Charger Applications Description Bluetooth™ headsets The AAT3693 BatteryManager is a highly integrated single-cell lithium-ion/polymer (Li-Ion) battery charger that operates from a USB port or an AC adapter input with up to 7.5 V input voltage. The AAT3693 precisely regulates battery charge voltage and current for 4.2 V Li-Ion battery cells. The battery charging current can be set by an external resistor up to 1.6 A. Digital Thermal Loop Control maintains the maximum possible battery charging current for the given set of input to output power dissipation and ambient temperature conditions. Cell phones Digital still cameras MP3 players Personal data assistants (PDAs) Other Li-Ion battery powered devices Features USB or AC adapter system power charger Programmable from 100 mA to 1.6 A max. Input voltage range: 4.0 V 7.5 V High level of integration with internal: Charging device Reverse blocking diode Current sensing Digitized thermal regulation Charge current programming (ISET) Charge termination current programming (TERM) Charge timer (CT) Battery temperature sensing (TS) No-battery detection TS pin open detection Automatic recharge sequencing Full battery charge auto turn off/sleep mode/charge termination Shutdown current < 6 A Automatic trickle charge for battery preconditioning Over-voltage and over-current protection Emergency thermal protection Power-on reset and soft start 2.2 x 2.2 TDFN Package TDFN (10-pin, 2.2 mm 2.2 mm) package (MSL1, 260 ºC per JEDEC J-STD-020) Battery charge state is continuously monitored for fault conditions. In the event of an over-current, over-voltage, shortcircuit, or over-temperature condition, the device shuts down automatically to protect the charging device, the control system, and the battery under-charge. A status monitor output pin is provided to indicate the battery charge status by directly driving an external LED. An open-drain power source detection output is provided to report the power supply status. With the "No-Battery Detection" circuit integrated, the status LEDs indicate that the battery is not present or not properly installed. The AAT3693 is available in the Pb-free, thermally enhanced, space-saving 10-pin, 2.2 mm 2.2 mm TDFN packages and is specified for operation over the −40 °C to +85 °C temperature range. A typical application circuit is shown in Figure 1. The pin configurations are shown in Figure 2. Signal pin assignments and functional pin descriptions are provided in Table 1. Skyworks Green™ products are compliant with all applicable legislation and are halogen-free. For additional information, refer to Skyworks Definition of Green™, document number SQ04-0074. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201896C • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • September 2, 2014 1 DATA SHEET • AAT3693: 1.6 A LI-ION/POLYMER BATTERY CHARGER AAT3693 VIN BAT + BAT VIN CBAT STAT1 STAT2 ON/OFF Temp EN TS CT TERM ISET GND CcT Battery Pack RSET RTERM tc389 Figure 1. AAT3693 Typical Application Circuit VIN 1 10 STAT1 2 8 TS STAT2 3 8 TERM EN 4 7 ISET GND 5 6 CT EP BAT tc390 Figure 2. AAT3693 Pinout – 10-Pin, 2.2 mm 2.2 mm TDFN (Top View) Table 1. AAT3693 Signal Descriptions Pin No. Name Type 1 VIN I Input from USB port/adapter connector. Description 2 STAT1 O Charge status pin, open-drain. 3 STAT2 O Charge status pin, open-drain. 4 EN I Active high enable pin (with internal pull-down). 5 GND I/O 6 CT I Charge timer programming input pin (no timer if grounded). 7 ISET I Charge current programming input pin. 8 TERM I 9 TS I/O Battery temperature sense pin. 10 BAT O Connect to lithium-ion battery. EP EP Connect to power ground. Charge termination current programming input pin (internal default 10% termination current if TERM is open). Exposed paddle (bottom): connect to ground as closely as possible to the device. Electrical and Mechanical Specifications The absolute maximum ratings of the AAT3693 are provided in Table 2, the thermal information is listed in Table 3, and electrical specifications are provided in Table 4. Typical performance characteristics of the AAT3693 are illustrated in Figures 3 through 24. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 2 September 2, 2014 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • 201896C DATA SHEET • AAT3693: 1.6 A LI-ION/POLYMER BATTERY CHARGER Table 2. AAT3693 Absolute Maximum Ratings (Note 1) Parameter Symbol Minimum Typical Maximum Units V IN continuous VIN 0.3 8.0 BAT, STAT1, STAT2, EN, ISET, TS VBAT, VSTAT1, VSTAT2, VEN, VISET, VTS 0.3 VIN + 0.3 V Junction temperature range TJ 40 +150 ºC Operating temperature range TOP 40 +85 ºC Maximum soldering temperature (at leads) TLEAD 300 ºC Note 1: Exposure to maximum rating conditions for extended periods may reduce device reliability. There is no damage to device with only one parameter set at the limit and all other parameters set at or below their nominal value. Exceeding any of the limits listed may result in permanent damage to the device. Table 3. AAT3693 Thermal Information Parameter Symbol Value Units Maximum thermal resistance (Note 1) JA 50 ºC/W Maximum power dissipation (Note 2) PD 2 W Note 1: Mounted on an FR4 board. Note 2: At 25 C ambient temperature. CAUTION: Although this device is designed to be as robust as possible, Electrostatic Discharge (ESD) can damage this device. This device must be protected at all times from ESD. Static charges may easily produce potentials of several kilovolts on the human body or equipment, which can discharge without detection. Industry-standard ESD precautions should be used at all times. Table 4. AAT3693 Electrical Specifications (1 of 2) (Note 1) (VIN = 5.5 V, TA = –40 C to +85C, RSET = 1.47 k, RTERM = OPEN. Unless Otherwise Noted, Typical Values are TA = 25 C) Parameter Symbol Test Condition Min Typical Max Units 7.5 V Operation Input voltage range VIN 4.0 Rising edge Under-voltage lockout threshold 3 VUVLO UVLO hysteresis Operating current 4 150 V mV IOP Charge current = 100 mA 0.3 1 mA Sleep mode current ISLEEP VBAT = 4.25 V or EN = GND 0.4 1 A Leakage current from BAT pin ILEAKAGE VBAT = 4 V, VIN pin open 0.4 2 A 1600 mA +10 % Current Regulation Charge current programmable range ICC(RANGE) 100 Constant-current mode charge current ICC/ICC ISET pin voltage VISET Charge current set factor: ICH_CC/IISET KI_SET Constant current mode, VBAT = 3.6 V TERM pin voltage VTERM RTERM = 13.3 k Trickle charge current ICH_TRK/ICC Charge termination threshold current ICH_TERM/ICC VBAT = 3.6 V −10 2 V 800 2 V 5 10 15 %ICH_CC TERM pin open 5 10 15 % ICH_CC RTERM = 13.3 k, ICC 800 mA 8 10 12 % 4.158 4.20 4.242 V Voltage Regulation Constant output voltage VCO(REG) Constant output voltage tolerance VCO/VCO Preconditioning voltage threshold VMIN Battery recharge voltage threshold VRCH 0.5 (Option available for no trickle charge) 2.5 2.6 % 2.9 VBAT_REG − 0.1 V V Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201896C • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • September 2, 2014 3 DATA SHEET • AAT3693: 1.6 A LI-ION/POLYMER BATTERY CHARGER Table 4. AAT3693 Electrical Specifications (2 of 2) (Note 1) (VIN = 5.5 V, TA = –40 C to +85C, RSET = 1.47 k, RTERM = OPEN. Unless Otherwise Noted, Typical Values are TA = 25 C) Parameter Symbol Test Condition Min Typ Max Units 0.6 Charging Devices Charging transistor on-resistance RDS(ON) VIN = 4.6 V, VBAT = 4.0 V, Charge current = 1 A Logic Control/Protection Input high threshold VEN(H) Input low threshold VEN(L) STAT pin output voltage VSTAT STAT pin current sink capability ISTAT Over-voltage protection threshold VOVP Over-current protection threshold IOCP TS voltage range for no battery indication TSNOBAT 1.6 V STAT pin sinks 4 mA (In constant voltage mode) 0.4 V 0.4 V 8 mA 4.4 V 105 %ICH_CC VIN − 50 mV V Option for AA, AC, AI, AK (Note 2) Trickle time out tK CCT = 0.1 F, VIN = 5 V 25 minutes CC + CV mode time out tC + tV CCT = 0.1 F, VIN = 5 V 3 hours Option for AB, AD, AJ, AK (Note 2) No trickle charge tK 0 minutes CC + CV mode time out tC + tV CCT = 0.1 F, VIN = 5 V 3 hours Trickle time out tK CCT = 0.1 F, VIN = 5 V 25 minutes CC mode time out tC CCT = 0.1 F, VIN = 5 V 1 hours CV mode time out tV CCT = 0.1 F, VIN = 5 V 2 hours 0 minutes Option for AE, AG (Note 2) Option for AF, AH (Note 2) No trickle charge tK CC mode time out tC CCT = 0.1 F, VIN = 5 V 1 hours CV mode time out tV CCT = 0.1 F, VIN = 5 V 2 hours Option for AC, AD, AG, AH, AK, AL, BO, BP (Note 2) Current source from TS pin High temperature threshold Low temperature threshold 75 A Threshold 331 mV Hysteresis 25 mV Threshold 2.39 V Hysteresis 25 mV ITS VTS1 VTS2 Option for AA, AB, AE, AF, AI, AJ, BM, BN (Note 2) High temperature threshold VTS1 29.1 Low temperature threshold VTS2 58.2 Thermal loop entering threshold TLOOP_IN 115 ºC Thermal loop exiting threshold TLOOP_OUT 85 ºC Thermal loop regulation TREG Chip thermal shutdown temperature TSHDN Threshold 30 30.9 %VIN 60 61.8 %VIN 100 ºC 140 ºC Note 1: Performance is guaranteed only under the conditions listed in this table. Note 2: Only options AA, AB, AI and AJ have been released. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 4 September 2, 2014 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • 201896C DATA SHEET • AAT3693: 1.6 A LI-ION/POLYMER BATTERY CHARGER Typical Performance Characteristics (VIN = 5.5 V, TA = –40 C to +85C, RSET = 1.47 k, RTERM = OPEN. Unless Otherwise Noted, Typical Values are TA = 25 C) 1.8 10000 1.6 Charging Current (A) 100 10 1 0.1 1 10 100 RSET = 866 Ω RSET = 1.47 kΩ RSET = 3.16 kΩ RSET = 8.06 kΩ 1.4 1.2 1 0.8 0.6 0.4 0.2 0 2.5 1000 tc392 1000 tc391 Charging Current (mA) Constant Charging Current Pre-conditioning Current 2.7 2.9 RSET (kΩ Ω) 3.1 3.3 3.5 3.7 3.9 4.1 4.3 Battery Voltage (V) Figure 4. Charging Current vs Battery Voltage Figure 3. Charging Current vs RSET Values 4.22 0.09 0.08 4.21 0.06 VCO(REG) (V) 0.05 0.04 4.2 0.03 4.19 0.02 0 4.5 tc393 0.01 5 5.5 6 6.5 7 4.18 -40 7.5 tc394 ΔVCO/VCO (%) 0.07 -15 35 60 85 Temperature (°C) Input Voltage (V) Figure 6. Battery Charger Constant Output Voltage vs Temperature Figure 5. Battery Charger Constant Output Voltage Accuracy vs Input Voltage (Battery Voltage = 4.2 V) 2.7 165 2.65 163 2.6 VMIN (V) 161 159 2.55 2.5 157 -15 10 35 60 85 Temperature (°C) Figure 7. Preconditioning Charge Current vs Temperature (RSET = 866 ) 2.4 -40 tc396 155 -40 2.45 tc395 Preconditioning Charge Current (mA) 10 -15 10 35 60 85 Temperature (°C) Figure 8. Preconditioning Voltage Threshold vs Temperature Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201896C • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • September 2, 2014 5 DATA SHEET • AAT3693: 1.6 A LI-ION/POLYMER BATTERY CHARGER 4.14 250 225 200 4.12 150 VRCH (V) ICH_TRK (mA) 175 RSET = 866 Ω RSET = 1.47 kΩ RSET = 3.16 kΩ RSET = 8.06 kΩ 125 100 4.10 4.08 75 tc423 0 4 4.5 5 5.5 6 6.5 7 4.04 -40 7.5 tc398 4.06 50 25 -15 78 1700 76 1600 74 ITS (μA) 1800 1500 VBAT = 3.3 V VBAT = 3.6 V VBAT = 3.9 V VBAT = 4.1 V 5.5 6.0 6.5 7.0 72 70 68 -40 7.5 -15 2.4 2.38 2.36 2.34 35 60 60 85 Temperature (°C) Figure 13. Low Temperature Threshold vs Temperature (for Option AC, AD, AG, AH, AK, AL, BO, BP) 0.345 0.34 0.335 0.33 0.325 0.32 -40 -15 10 35 60 85 Temperature (°C) Figure 14. High Temperature Threshold vs Temperature (for Option AC, AD, AG, AH, AK, AL, BO, BP) Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 6 85 tc402 2.42 High Temperature Threshold VTS1 (V) 2.44 tc401 Low Temperature Threshold VTS2 (V) 2.46 10 35 Figure 12. Current Source at the TS Pin vs Temperature (for Option AC, AD, AG, AH, AK, AL, BO, BP) Figure 11. Constant Charging Current vs Input Voltage (RSET = 866 ) -15 10 Temperature (°C) Input Voltage (V) 2.32 -40 85 tc400 1400 5.0 60 Figure 10. Battery Recharge Voltage Threshold vs Temperature tc399 Constant Charging Current (mA) Figure 9. Preconditioning Charge Current vs Input Voltage 4.5 35 Temperature (°C) Input Voltage (V) 1300 4.0 10 September 2, 2014 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • 201896C 3 2.99 2.98 2.97 -40 -15 10 35 60 1.51 1.5 1.49 1.48 tc404 3.01 1.52 High Temperature Threshold VTS1 (V) 3.02 tc403 Low Temperature Threshold VTS2 (V) DATA SHEET • AAT3693: 1.6 A LI-ION/POLYMER BATTERY CHARGER 1.47 -40 85 -15 10 60 85 Temperature (°C) Temperature (°C) Figure 16. High Temperature Threshold vs Temperature (for Option AA, AB, AE, AF, AI, AJ, BM, BN; VIN = 5 V) Figure 15. Low Temperature Threshold vs Temperature (for Option AA, AB, AE, AF, AI, AJ, BM, BN; VIN = 5 V) 1.6 3.0 Constant Charging Current Pre-conditioning Current 2.5 1.4 85 °C 25 °C −40 °C 1.2 ISHDN (μA) 2.0 1.5 1.0 1 0.8 0.6 0.4 0.5 0.0 0.1 1 10 100 0 4.0 1000 tc406 0.2 tc405 Operating Current (mA) 35 4.5 5.0 5.5 6.0 6.5 7.0 7.5 Input Voltage (V) RSET (kΩ) Figure 18. Shutdown Current vs Input Voltage Figure 17. Operating Current vs ISET Resistor 0.10 1.0 Capacitance (μF) 0.05 0.00 -0.05 Preconditioning Timeout 0.6 0.5 0.4 0.3 Preconditioning + Constant Current Timeout or Constant Voltage Timeout -15 10 35 60 85 Temperature (°C) Figure 19. Counter Timeout vs Temperature (CCT = 0.1 F) 0.1 tc408 -0.10 -40 0.7 0.2 tc407 Counter Timeout (%) 0.9 0.8 0.0 0 1 2 3 4 5 Time (hours) Figure 20. CT Pin Capacitance vs Counter Timeout Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201896C • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • September 2, 2014 7 DATA SHEET • AAT3693: 1.6 A LI-ION/POLYMER BATTERY CHARGER 600 50% 85 °C 25 °C −40 °C 550 500 RDS(ON) (Ω) ICH_TERM/ICC (%) 40% 30% 20% 450 400 350 300 10% 10 20 30 40 50 200 3.6 60 3.9 4.2 1.2 1.3 1.1 1 1.1 0.9 VEN(L) (V) 1.2 1 0.9 0.8 85 °C 25 °C −40 °C 0.7 5.0 5.5 6.0 5.1 Figure 22. Charging Transistor On Resistance vs Input Voltage 1.4 6.5 7.0 Input Voltage (V) Figure 23. Input High Threshold vs Input Voltage 0.8 0.7 0.6 85 °C 25 °C −40 °C 0.5 tc411 VEN(H) (V) Figure 21. Termination Current to Constant Current Ratio (%) vs Termination Resistance 4.5 4.8 Input Voltage (V) ITERM Resistance (kΩ) 0.6 4.0 4.5 7.5 0.4 4.0 4.5 5.0 5.5 6.0 6.5 7.0 Input Voltage (V) Figure 24. Input High Threshold vs Input Voltage Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 8 September 2, 2014 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • 201896C tc412 0 tc410 tc409 250 0% 7.5 DATA SHEET • AAT3693: 1.6 A LI-ION/POLYMER BATTERY CHARGER Reverse Blocking IN BAT Current Comparator CV/Pre-charge TERM UVLO Constant Current ISET Charge Control EN Thermal Loop Battery OV Protection TS CT Over-Temp. Protect Watchdog Timer STAT1 Charge Status STAT2 GND tc413 Figure 25. AAT3693 Functional Block Diagram Functional Description A functional block diagram is shown in Figure 25. The AAT3693 is a high-performance battery charger designed to charge single-cell lithium-ion or lithium-polymer batteries with up to 1.6 A of current from an external power source. It is a standalone charging solution, with just one external component required for complete functionality. The AAT3693 precisely regulates battery charge voltage and current for 4.2 V lithium-ion/polymer battery cells with constant current level being programmed up to 1.6 A for rapid charging applications. The charge termination current can be programmed by an external resistor. The AAT3693 is rated for operation from −40 °C to +85 °C. In the event of operating ambient temperatures exceeding the power dissipation abilities of the device package for a given constant current charge level, the charge control enters into thermal limit. The AAT3693 provides two status monitor output pins (STAT1 and STAT2) which directly drive two external LEDs to indicate the battery charging state. With no-battery detection and status indication, the user can be notified if the battery is not inserted properly. Device junction temperature and charge state are fully monitored for fault conditions. In the event of an over-voltage or over-temperature failure, the device automatically shuts down to protect the charging device, control system and the battery under-charge. During battery charging, the device temperature rises. In some cases with adapter charging, the power dissipation in the device may cause the junction temperature to rise closer to its thermal shutdown threshold. In the event of an internal over-temperature condition caused by excessive ambient operating temperature or excessive power dissipation condition, the AAT3693 enables a digitally controlled thermal loop system to reduce the charging current to prevent the device from thermal shutdown. The digital thermal loop maintains the maximum possible battery charging current for the given set of input to output power dissipation and ambient temperature conditions. The digital thermal loop control is dynamic in the sense that it continues to adjust the battery charging current as operating conditions change. The digital thermal loop resets and resumes normal operation when the power dissipation or over-temperature conditions are removed. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201896C • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • September 2, 2014 9 DATA SHEET • AAT3693: 1.6 A LI-ION/POLYMER BATTERY CHARGER Charging Operation Figure 26 illustrates the entire battery charging profile or operation, which consists of four phases: 1. Preconditioning (Trickle) Charge (trickle charge) current is 50 mA. Battery cell preconditioning (trickle charging) is a safety precaution for deeply discharged cells and also reduces the power dissipation in the internal series pass MOSFET when the input-output voltage differential is at the greatest potential. 2. Constant Current Charge 3. Constant Voltage Charge Constant Current Charging 4. Automatic Recharge Battery cell preconditioning continues until the battery voltage reaches the preconditioning voltage threshold, VMIN. At this point, the AAT3693 begins constant current charging. The current level for this mode is programmed using a single resistor from the ISET pin to ground. Programmed current can be set from a minimum of 100 mA up to a maximum of 1.6 A Battery Preconditioning Battery charging commences only after the AAT3693 checks several conditions in order to maintain a safe charging environment. The input supply must be above the minimum operating voltage (VUVLO) and the enable pin must be high. When the battery is connected to the BAT pin, the AAT3693 checks the condition of the battery and determines which charging mode to apply. If the battery voltage is below the preconditioning voltage threshold, VMIN, the AAT3693 begins preconditioning the battery cell (trickle charging) by charging at 10% of the programmed constant current. For example, if the programmed current is 500 mA, the preconditioning mode Charge Complete Voltage Preconditioning Trickle Charge Phase Constant Current Charge Phase I = Max CC Regulated Current Constant Voltage Charging Constant current charging continues until the battery voltage reaches the constant output voltage (end of charge) voltage regulation point, VCO(REG). When the battery voltage reaches VCO(REG), the AAT3693 will transition to constant voltage mode. The regulation voltage is factory programmed to a nominal 4.2 V and continues charging until the charge termination current is reached. Constant Voltage Charge Phase Battery Discharge Constant Voltage Charge Phase Battery Recharge Voltage Threshold Constant Current Mode Voltage Threshold Trickle Charge and Termination Threshold I = CC/10 tc414 Figure 26 . Current vs Voltage Profile during Charging Phases Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 10 September 2, 2014 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • 201896C DATA SHEET • AAT3693: 1.6 A LI-ION/POLYMER BATTERY CHARGER Power On Reset No Shut Down Enable Yes No No Charge Suspended Power Input Voltage VIN > VUVLO Power Input Voltage VIN > VUVLO Enable And EN = High Yes Yes Yes Fault Conditions Monitoring OV, OT, VTS1 < VTS < VTS2 Charge Timer Counter Yes No Preconditioning Test Yes VMIN > VBAT No Preconditioning (Trickle Charge) Expired Shut Down Thermal Loop Current Reduction in CC Mode No Yes Recharge Test VBAT < VRCH Yes Current Phase Test Yes VCO > VBAT Constant Current Charge Mode No Voltage Phase Test ICHARGE > ICH_TERM Device Thermal Loop Monitor TJ > 115 ºC No Yes Constant Voltage Charge Mode No Charge Completed Reset tc415 Figure 27. System Operation Flowchart for the Battery Charger Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201896C • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • September 2, 2014 11 DATA SHEET • AAT3693: 1.6 A LI-ION/POLYMER BATTERY CHARGER Application Information Adapter or USB Power Input Constant current charge levels up to 1.6 A can be programmed by the user when powered from a sufficient input power source. The AAT3693 operates from the adapter input over a 4.0 V to 7.5 V range. The constant current mode fast charge current for the adapter input is set by the RSET resistor connected between ISET and ground. Refer to Table 5 for recommended RSET values for a desired constant current charge level; values are rounded off to 1% standard resistance values. Automatic Recharge The AAT3693 has a UVLO and power-on reset feature so that if the input supply to the VIN pin drops below the UVLO threshold, the charger suspends charging and shuts down. When power is reapplied to the IN pin or the UVLO condition recovers, the system charge control assesses the state of charge on the battery cell and automatically resumes charging in the appropriate mode for the condition of the battery. Enable / Disable The AAT3693 provides an enable function to control the charger IC on and off. The enable (EN) pin is internally pulled down. When pulled to a logic high level, the AAT3693 is enabled. When left open or pulled to a logic low level, the AAT3693 is shut down. Charging is halted regardless of the battery voltage or charging state. When the device is re-enabled, the charge control circuit automatically resets and resumes charging functions with the appropriate charging mode based on the battery charge state and measured cell voltage on the BAT pin. Programming Charge Current The constant current mode charge level is user programmed with a set resistor placed between the ISET pin and ground. The accuracy of the constant charge current, as well as the preconditioning trickle charge current, is dominated by the tolerance of the set resistor used. For this reason, a 1% tolerance metal film resistor is recommended for the set resistor function. The constant charge current levels from 100 mA to 1.6 A can be set by selecting the appropriate resistor value from Table 5. The relationship between the charging current and the RSET values is shown in Figure 3. Table 5. Constant Charging Current vs RSET Constant Charging Current (mA) RSET (k) 100 16.5 200 8.06 300 5.36 400 4.02 500 3.16 600 2.67 700 2.26 800 1.87 900 1.78 1000 1.47 1250 1.18 1600 0.866 Programmable Charge Termination Current The AAT3693 provides a user-programmable charge termination current at the end of the charge cycle. When the battery cell voltage sensed by the BAT pin reaches 4.2 V, the charge control transitions from constant current fast charge mode to constant voltage mode. In constant voltage mode, the battery cell voltage is regulated at 4.2 V. The charge current drops as the battery reaches its full charge capacity. When the charge current drops to the programmed end of charge VCO(REG) current, the charge cycle is complete and the charge controller terminates the charging process. If the TERM pin is left open, the termination current sets to 10% of the constant charging current as the default value. The charge termination current ICH_TERM can be programmed by connecting a resistor from TERM to GND. Use the values listed in Table 6 to set the desired charge termination current. The relationship between the charging termination threshold current and the RSET values is shown as Figure 21. Table 6. Charge Termination Threshold Current Programming Resistor Values RTERM (k) ICH_TERM/ ICC (%) 6.65 5% 13.3 10% 26.7 20% 40.2 30% 53.6 40% Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 12 September 2, 2014 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • 201896C DATA SHEET • AAT3693: 1.6 A LI-ION/POLYMER BATTERY CHARGER Table 7. LED Status Indicator (STATx Pulled Up to a Voltage Source with Resistors and LED) (Note 1) All Options Options AA, AB, AE, AF, AI, AJ, BM and BN Options AC, AD, AG, AH, AK, AL, BO and BP STAT1 STAT2 Type 1 STAT2 Type 2 Flash Flash Flash Battery charging Low High High Charge complete High Low High Fault condition High High Low Event Description No battery (with charge enabled) Note 1: Low = LED ON; High = LED OFF. If the desired end of charge termination current level is not listed in Table 6, the TERM resistor value can be calculated by the following equation: I CH_TERM 15 A RTERM I CC 2V When the charge current drops to the programmed charge termination current level in the constant voltage mode, the device terminates charging and goes into a sleep state. The charger remains in this sleep state until the battery voltage decreases to a level below the battery recharge voltage threshold (VRCH). In such cases where the AAT3693 input voltage drops, the device enters the sleep state and automatically resumes charging once the input supply has recovered from the fault condition. Consuming very low current in the sleep state, the AAT3693 minimizes battery drain when it is not charging. This feature is particularly useful in applications where the input supply level can fall below the battery charge or under-voltage lockout level. Charge Status Outputs The AAT3693 provides battery charge status via two status pins. These pins are internally connected to an N-channel opendrain MOSFET, which can be used drive external LEDs. The status pins can indicate the conditions shown in Table 7. The AAT3693 has a battery fault detector, which, when used in conjunction with a 0.1 F capacitor on the CT pin, outputs a 1Hz signal with 50% duty cycle at the STAT1 pin in the event of a timeout while in the trickle charge mode. Fault conditions can be one of the following: Battery over voltage (OV) Battery temperature sense hot or cold Battery charge timer time-out Chip thermal shutdown Status LED Setup The LEDs should be biased with as little current as necessary to create reasonable illumination; therefore, a ballast resistor should be placed between the LED cathode and the STAT pin (2 mA should be sufficient to drive most low-cost green or red LEDs). It is not recommended to exceed 8 mA for driving an individual status LED. The required ballast resistor values can be estimated using the following formula: RBALLSAT VIN VF ( LED ) I LED Example: RBALLSAT 5.0V 2.0V 1.5k 2mA Note: Red LED forward voltage (VF) is typically 2.0 V @ 2 mA. Protection Circuitry No-Battery Detection After a battery is inserted and the AAT3693 detects the battery, the regular LED reporting indicates the current charging status after 5 or 6 flashes. If the battery is not detected, the status LEDs flash at a frequency of 1 Hz with ~50% duty cycle ratio continuously on all options (AAT3693 AA, AB, … , BO and BT), except AI and AJ. The no-battery detection circuit is not integrated in the AAT3693 AI or AJ. For these two options, the charger IC treats the output ceramic capacitor as a battery. Since the capacitance of the ceramic capacitor is very small, the charge cycle is shortened and the STAT1 LED stays OFF for a long time and ON for a very short time. Therefore, the STAT1 LED appears to always be OFF. In addition, since the ceramic capacitor’s discharge cycle is much longer than its charge cycle, the STAT2 LED appears to remain ON because the brief OFF phase of the cycle is so short that the human eye cannot perceive it. If the thermal sensing TS pin is open, it would be considered as no battery condition. Please refer to the Battery Temperature Fault Monitoring section to determine the proper biasing for the TS pin. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201896C • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • September 2, 2014 13 DATA SHEET • AAT3693: 1.6 A LI-ION/POLYMER BATTERY CHARGER Programmable Watchdog Timer The AAT3693 contains a watchdog timing circuit to shut down charging functions in the event of a defective battery cell not accepting a charge over a preset period of time. Typically, a 0.1 F ceramic capacitor is connected between the CT pin and ground. When a 0.1 F ceramic capacitor is used, the device times out a shutdown condition if the trickle charge mode exceeds 25 minutes. The time-out timer resets at start of the constant current mode setting the time-out to 1 hour (default). When the device transitions to the constant voltage mode, the timing counter is reset and times out after an additional 2 hours if the charge current does not drop to the charge termination level for options AE, AF, AG, AH, BM, BN, BO and BP. For all other options (AA, AB, AC, AD, AI, AJ, AK and AL), the timeout timer does not reset at every charging mode and times out in 3 hours (default). Table 8 list the time-out options. Table 8. Watchdog Timer Time-Out Options Mode Trickle Charge (TC) timeout Timer Time Units Reset 25 Minute Constant Current (CC) timeout Reset 1 Hour Constant Voltage (CV) timeout Reset 2 Hour Assuming: CCT = 0.1 F and VIN = 5.0 V. The CT pin is driven by a constant current source and provides a linear response to increases in the timing capacitor value. Thus, if the timing capacitor were to be doubled from the nominal 0.1 F value, the time-out periods would be doubled. If the programmable watchdog timer function is not needed, it can be disabled by connecting the CT pin to ground. The CT pin should not be left floating or unterminated, as this causes errors in the internal timing control circuit. The constant current provided to charge the timing capacitor is very small, and this pin is susceptible to noise and changes in capacitance value. Therefore, the timing capacitor should be physically located on the printed circuit board layout as close as possible to the CT pin. Since the accuracy of the internal timer is dominated by the capacitance value, a 10% tolerance or better ceramic capacitor is recommended. Ceramic capacitor materials, such as X7R and X5R types are a good choice for this application. Battery Over-Voltage Protection An over-voltage event is defined as a condition where the voltage on the BAT pin exceeds the maximum battery charge voltage and is set by the overvoltage protection threshold (VOVP). If an over-voltage condition occurs, the AAT3693 charge control shuts down the device until the voltage on the BAT pin drops below VOVP. The AAT3693 resumes normal charging operation after the overvoltage condition is removed. During an over-voltage event, the STAT1 LED reports a system fault. Over-Temperature Shutdown The AAT3693 has a thermal protection control circuit that shuts down charging functions if the internal die temperature exceeds the preset thermal limit threshold. Once the internal die temperature falls below the thermal limit, normal operation resumes the previous charging state. Battery Temperature Fault Monitoring In the event of a battery over-temperature condition, the charge control turns off the internal pass device. The STAT LEDs also display a system fault. After the system recovers from a temperature fault, the device resumes charging operation. The AAT3693 checks battery temperature before starting the charge cycle, as well as during all phases of charging. This is accomplished by monitoring the voltage at the TS pin. This system is intended for use with negative temperature coefficient thermistors (NTC) that are typically integrated into the battery package. Most of the commonly used NTC thermistors in battery packs are approximately 10 k at room temperature (25 °C). For options AC, AD, AG, AH, AK, AL, BO, and BP, the TS pin has been specifically designed to source 75 A of current to the thermistor. The voltage on the TS pin resulting from the resistive load should stay within a window of 331 mV to 2.39 V. If the battery becomes too hot during charging due to an internal fault or excessive constant charge current, the thermistor heats up and reduces in value, pulling the TS pin voltage lower than the TS1 threshold, and the AAT3693 stops charging until the condition is removed, then charging is resumed. If the use of the TS pin function is not required by the system, it should be terminated to ground using a 10 k resistor. For options AA, AB, AE, AF, AI, AJ, BM, and BN, the internal battery temperature sensing system is comprised of two comparators which establish a voltage window for safe operation. The thresholds for the TS operating window are bounded by the TS1 and TS2 specifications. Referring to Table 4, the TS1 threshold = 0.30 VIN and the TS2 threshold = 0.60 VIN. If the use of the TS pin function is not required by the system, the TS pin should be connected to input supply VIN. Figure 28 shows the battery temperature sensing operation. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 14 September 2, 2014 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • 201896C DATA SHEET • AAT3693: 1.6 A LI-ION/POLYMER BATTERY CHARGER VIN IN AAT3693 0.6 × VIN − RHI TS Battery Pack + T Battery Cold Fault TS COLD (TS2) − TS HOT (TS1) Battery Hot Fault + RLO 0.3 × VIN Battery Temperature Sense Circuit AAT3693-AA, AB, AE, AF, AI, AJ, BM, BN tc416 Figure 28. Battery Temperature Sensing Operation RLO 1 1 VIN RCOLD RHOT VCOLD VHOT V V RHOT IN 1 RCOLD IN 1 VHOT VCOLD RHI VIN 1 VCOLD 1 1 RLO RCOLD level or until an equilibrium current is discovered and maximized for the given ambient temperature condition. The thermal loop controls the system charge level; therefore, the AAT3693 always provides the highest level of constant current in the fast charge mode possible for any given ambient temperature condition Thermal Considerations The AAT3693 is offered in the 10-pin, 2.2 mm 2.2 mm TDFN package, which can provide up to 2 W of power dissipation when properly bonded to a printed circuit board and has a maximum thermal resistance of 50 °C/W. Many considerations should be taken into account when designing the printed circuit board layout, as well as the placement of the charger IC package in proximity to other heat generating devices in a given application design. The ambient temperature around the charger IC also has an effect on the thermal limits of a battery charging application. The maximum limits that can be expected for a given ambient condition can be estimated by the following discussion. First, the maximum power dissipation for a given situation should be calculated: p D(MAX) TJ T A JA Where: PD(MAX) = maximum power dissipation (W) Where, VHOT = 0.3 VIN JA = package thermal resistance (°C/W) VCOLD= 0.6 VIN TJ = thermal loop entering threshold (°C) (115°C) VIN = input voltage TA = ambient temperature (°C) RHOT = NTC resistance at high temperature Figure 29 shows the relationship between maximum power dissipation and ambient temperature for the AAT3693. Digital Thermal Loop Control 2 PD(MAX) (W) Due to the integrated nature of the linear charging control pass device for the adapter mode, a special thermal loop control system has been employed to maximize charging current under all operation conditions. The thermal management system measures the internal circuit die temperature and reduces the fast charge current when the device exceeds a preset internal temperature control threshold. Once the thermal loop control becomes active, the fast charge current is initially reduced by a factor of 0.44. 2.5 1.5 1 0.5 tc417 RCOLD = NTC resistance at low temperature 0 The initial thermal loop current can be estimated by the following equation: I TLOOP I CC 0.44 The thermal loop control re-evaluates the circuit die temperature every 3 seconds and adjusts the fast charge current backup in small steps to the full fast charge current 0 25 50 75 100 TA (°°C) Figure 29. Maximum Power Dissipation before Entering Thermal Loop Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201896C • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • September 2, 2014 15 DATA SHEET • AAT3693: 1.6 A LI-ION/POLYMER BATTERY CHARGER Capacitor Selection Next, the power dissipation can be calculated by the following equation: Input Capacitor p D VIN VBAT I CC VIN I OP In general, it is good design practice to place a decoupling capacitor closer to the IC and between the IN pin and GND. Where: PD = total power dissipation by the device VIN = input voltage VBAT = battery voltage as seen at the bat pin ICC = constant charge current programmed for the application IOP = quiescent current consumed by the charger IC for normal operation (0.3 mA] By substitution, we can derive the maximum charge current before reaching the thermal limit condition (thermal loop). The maximum charge current is the key factor when designing battery charger applications. I CH(MAX) Output Capacitor PD( MAX ) VIN I OP VIN VBAT TJ ( MAX ) TA JA I CH(MAX) VIN I OP VIN VBAT In general, the worst condition is the greatest voltage drop across the charger IC, when battery voltage is charged up to the preconditioning voltage threshold and before entering thermal loop regulation. For best results, it is recommended to physically place the battery pack as close as possible to the AAT3693 BAT pin. To minimize voltage drops on the PCB, keep the high current carrying traces adequately wide. When designing with a charging current system >500 mA, a multilayer ground plane PCB design is highly recommended. Putting thermal vias on the thermal pad design effectively transfers heat from the top metal layer of the PCB to the inner or bottom layers. The number of thermal vias depends on the application and power dissipation. The AAT3693 evaluation board (Figure 31) is an example layout for reference. 1000 800 TA = 45 °C ICC(MAX) (mA) The AAT3693 only requires a 1 F ceramic capacitor on the BAT pin to maintain circuit stability. This value should be increased to 10 F or more if the battery connection is made any distance from the charger output. If the AAT3693 is to be used in applications where the battery can be removed from the charger, such as with desktop charging cradles, an output capacitor greater than 10 F may be required to prevent the device from cycling on and off when no battery is present. It is good design practice to place the decoupling capacitor closer to the IC and between the BAT pin and GND. PCB Layout Considerations Figure 30 shows the maximum charge current at different ambient temperatures. TA = 25 °C 600 An input capacitor in the range of 1 F to 22 F is recommended. If the source supply is unregulated, it may be necessary to increase the capacitance to keep the input voltage above the under-voltage lockout threshold during device enable and when battery charging is initiated. If the AAT3693 adapter input is used in a system with an external power supply source, such as a typical AC-to-DC wall adapter, then a CIN capacitor in the range of 10 F should be used. A larger input capacitor in this application minimizes switching or power transient effects when the power supply is “hot plugged”. 400 200 TA = 35 °C 4.5 4.75 TA = 60 °C 5 5.25 5.5 tc418 0 4.25 5.75 6 6.25 6.5 6.75 7 VIN (VV) Figure 30. Maximum Charging Current before the Digital Thermal Loop Becomes Active Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 16 September 2, 2014 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • 201896C DATA SHEET • AAT3693: 1.6 A LI-ION/POLYMER BATTERY CHARGER Evaluation Board Description Package Information The AAT3693 Evaluation Board is used to test the performance of the AAT3693. An Evaluation Board schematic diagram is provided in Figure 31. Layer details for the Evaluation Board are shown in Figure 32. The Evaluation Board has additional components for easy evaluation; the actual bill of materials required for the system is shown in Table 9. Table 10 lists the AAT3693 options. Package dimensions for the 10-pin TDFN package are shown in Figure 33. Tape & reel dimensions are shown in Figure 34. C1 10 μF C2 10 μF VIN R5 (see notes) BAT U1 AAT3693IDH 1 D1 (G ) R3 1.5 kΩ 2 R4 Stat1 D2 (R ) 1.5 kΩ Stat2 BAT 10 STAT1 TS 9 STAT2 TERM VIN 3 4 5 EN EN ISET GND CT TS 8 7 6 EP C3 0.1 μF R1 1.47 kΩ R2 13.3 kΩ R6 10 kΩ Notes: R5: 10 kΩ for options AA, AB, AE, AF, AI, AJ, BM, BN R5: OPEN for options AC, AD, AG, AH, AK, AL, BO, BP tc419 Figure 31. AAT3693 Evaluation Board Schematic Table 9. AAT3693 Evaluation Board Bill of Materials Component C4 Part Number AAT3693IDH Description Manufacturer 1.6A linear Li-Ion/polymer battery charger in 2.2 2.2 mm TDFN Package Skyworks C1, C3, C6, C7 CRCW04021501F 1.47 k, 1%, 1/4 W; 0603 Vishay C2 CRCW04021332F 13.3 k, 1%, 1/4 W; 0603 Vishay C5 CRCW04021002F 10 k, 5%, 1/4 W; 0603 Vishay L1 CRCW04021001F 1.5 k, 5%, 1/4 W; 0603 Vishay R1, R2 GRM21BR71A106KE51L CER, 10 F, 10 V, 10% X7R, 0805 Murata R5, R6 TMK105BJ104KV CER, 0.1 F, 25 V, 10% X5RR, 0402 Taiyo Yuden R3 PRPN401PAEN Conn. Header, 2 mm zip Sullins Electronics R4 LTST-C190GKT Green LED, 0603 Lite-On Inc. R7 LTST-C190CKT Red LED, 0603 Lite-On Inc. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201896C • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • September 2, 2014 17 DATA SHEET • AAT3693: 1.6 A LI-ION/POLYMER BATTERY CHARGER Table 10. AAT3693 Options Temperature Sense Status Reporting Trickle Charge (TC) Timeout Constant Current (CC) Charge Timeout Constant Voltage (CV) Charge Timeout Option Name Trickle Charge Mode AA Yes 30% of VIN 60% of VIN Yes Yes Type 1 3 hours total AB No 30% of VIN 60% of VIN Yes Yes Type 1 3 hours total 4.2 AC Yes 0.33 V Fixed 2.39 V Fixed Yes Yes Type 2 3 hours total 4.2 AD No 0.33 V Fixed 2.39 V Fixed Yes Yes Type 2 3 hours total 4.2 AE Yes 30% of VIN 60% of VIN Yes Yes Type 1 25 minutes 1 hour 2 hours 4.2 AF No 30% of VIN 60% of VIN Yes Yes Type 1 25 minutes 1 hour 2 hours 4.2 AG Yes 0.33 V Fixed 2.39 V Fixed Yes Yes Type 2 25 minutes 1 hour 2 hours 4.2 AH No 0.33 V Fixed 2.39 V Fixed Yes Yes Type 2 25 minutes 1 hour 2 hours 4.2 AI Yes 30% of VIN 60% of VIN No Yes Type 1 3 hours total 4.2 AJ No 30% of VIN 60% of VIN No Yes Type 1 3 hours total 4.2 AK Yes 0.33 V Fixed 2.39 V Fixed No Yes Type 2 3 hours total 4.2 AL No 0.33 V Fixed 2.39 V Fixed No Yes Type 2 3 hours total 4.2 BM Yes 30% of VIN 60% of VIN Yes Yes Type 1 25 minutes 1 hour 2 hours 4.37 BN No 30% of VIN 60% of VIN Yes Yes Type 1 25 minutes 1 hour 2 hours 4.37 BO Yes 0.33 V Fixed 2.39 V Fixed Yes Yes Type 2 25 minutes 1 hour 2 hours 4.37 BP No 0.33 V Fixed 2.39 V Fixed Yes Yes Type 2 25 minutes 1 hour 2 hours 4.37 Low Threshold High Threshold Low Battery Check Charge Timer STAT1 STAT2 Constant Output Voltage VCO(REG) (V) 4.2 Top Side Middle 1 Layer Middle 2 Layer Bottom Side tc420 Figure 32. AAT3693 Evaluation Board Layer Details Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 18 September 2, 2014 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • 201896C DATA SHEET • AAT3693: 1.6 A LI-ION/POLYMER BATTERY CHARGER Index Area Detail "A" 1.700 ± 0.050 2.200 ± 0.050 2.200 ± 0.050 0.400 ± 0.050 0.180 ± 0.050 0.900 ± 0.050 Bottom View Pin 1 Indicator (optional) 0.203 REF 0.750 ± 0.050 Top View 0.400 BSC 0.500 ± 0.050 Detail "A" Side View tc421 Figure 33. AAT3693 14-pin TDFN Package Dimensions 4.00 ± 0.10 2.00 ± 0.05 1.00 ± 0.05 1.50 ± 0.10 3.50 ± 0.05 8.10 ± 0.20 1.75 ± 0.10 2.40 ± 0.05 0.254 ± 0.020 2.40 ± 0.05 4.00 ± 0.10 Pin 1 Location tc422 All dimensions are in millimeters. Figure 34. AAT3693 Tape and Reel Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 201896C • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • September 2, 2014 19 DATA SHEET • AAT3693: 1.6 A LI-ION/POLYMER BATTERY CHARGER Ordering Information Model Name Part Marking (Note 1) Manufacturing Part Number (Note 2) Evaluation Board Part Number 5FXYY AAT3693IDH-AA-T1 AAT3693IDH-AA-EVB 7DXYY AAT3693IDH-AB-T1 AAT3693IDH-AB-EVB AAT3693IDH-AC-T1 AAT3693IDH-AC-EVB AAT3693IDH-AD-T1 AAT3693IDH-AD-EVB AAT3693IDH-AE-T1 AAT3693IDH-AE-EVB AAT3693IDH-AF-T1 AAT3693IDH-AF-EVB AAT3693IDH-AG-T1 AAT3693IDH-AG-EVB AAT3693IDH-AH-T1 AAT3693IDH-AH-EVB 5GXYY AAT3693IDH-AI-T1 AAT3693IDH-AI-EVB 7EXYY AAT3693IDH-AJ-T1 AAT3693IDH-AJ-EVB AAT3693IDH-AK-T1 AAT3693IDH-AK-EVB AAT3693IDH-AL-T1 AAT3693IDH-AL-EVB AAT3693IDH-BM-T1 AAT3693IDH-BM-EVB AAT3693IDH-BN-T1 AAT3693IDH-BN-EVB AAT3693IDH-BO-T1 AAT3693IDH-BO-EVB AAT3693IDH-BP-T1 AAT3693IDH-BP-EVB AAT3693: 1.6 A Li-Ion/Polymer Battery Charger Note 1: XYY = assembly and date code. 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Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 20 September 2, 2014 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice • 201896C