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RT9503A Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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RT9503A Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 15 page  RT9503A 1 DS9503A-01 April 2011 www.richtek.com Features Automatic Input Supplies Selection 18V Maximum Rating for AC Adapter Integrated Selectable 100mA and 500mA USB Charge Current Internal Integrated Power MOSFETs AC Adapter Power Good Status Indicator Charge Status Indicator External Capacitor Programmable Safety Timer Under Voltage Protection Over Voltage Protection Automatic Recharge Feature Battery Temperature Monitoring Small 16-Lead WQFN Package Thermal Feedback Optimizing Charge Rate Power Path Controller RoHS Compliant and Halogen Free Pin Configurations Applications Digital Cameras Cellular Phones PDAs , Smart Phones and MP3 Players Portable Instruments Ordering Information General Description The RT9503A is a fully integrated low cost single-cell Li- Ion battery charger IC ideal for portable applications. The RT9503Ais capable of being powered up via theAC adapter and USB (Universal Serial Bus) port inputs. The RT9503A can automatically detect and select the AC adapter and the USB port as the power source for the charger. The RT9503A enters sleep mode when both supplies are removed. The RT9503A optimizes the charging task by using a control algorithm including preconditioning mode, fast charge mode, and constant voltage mode. The charging task is terminated as the charge current drops below the preset threshold. The USB charge current can be selected from preset ratings of 100mA and 500mA, while the AC adapter charge current can be programmed up to 1A with an external resistor. The internal thermal feedback circuitry regulates the die temperature to optimize the charge rate for all ambient temperatures. The RT9503A features 18V and 7V maximum rating voltages for AC adapter and USB port inputs respectively. Other features include external programmable safety timer, under voltage protection, over voltage protection for AC adapter supply, battery temperature monitoring, power supply status indicators and charge status indicator. (TOP VIEW) WQFN-16L 3x3 Fully Integrated Linear Single Cell Li-Ion Battery Charger with Power Path Note : Richtek products are : RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. ACIN TS TIMER BATT 12 11 10 9 13 14 15 16 1 2 3 4 8 7 6 5 GND 17 CHG_S AC_PGOOD EN USB RT9503A Package Type QW : WQFN-16L 3x3 (W-Type) Lead Plating System P : Pb Free G : Green (Halogen Free and Pb Free) |
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