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ACT8937QJ206-T Datasheet(PDF) 6 Page - Active-Semi, Inc |
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ACT8937QJ206-T Datasheet(HTML) 6 Page - Active-Semi, Inc |
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6 / 44 page  ACT8937 Rev 0, 21-Sep-10 ® - 6 - www.active-semi.com ActivePMU TM and ActivePathTM are trademarks of Active-Semi. I2CTM is a trademark of NXP. Copyright © 2010 Active-Semi, Inc. Innovative PowerTM Active-Semi Proprietary―For Authorized Recipients and Customers PIN DESCRIPTIONS CONT’D PIN NAME DESCRIPTION 25 VSEL Step-Down DC/DCs Output Voltage Selection. Drive to logic low to select default output voltage. Drive to logic high to select secondary output voltage. See the Output Voltage Programming section for more information. 26 SCL Clock Input for I2C Serial Interface. 27 SDA Data Input for I2C Serial Interface. Data is read on the rising edge of SCL. 28 nSTAT Active-Low Open-Drain Charger Status Output. nSTAT has a 8mA (typ) current limit, allowing it to directly drive an indicator LED without additional external components. See the Charge Status Indicator section for more information. 29, 30 BAT Battery Charger Output. Connect this pin directly to the battery anode (+ terminal) 31, 32 VSYS System Output Pin. Bypass to GA with a 10µF or larger ceramic capacitor. 33 CHGIN Power Input for the Battery Charger. Bypass CHGIN to GA with a capacitor placed as close to the IC as possible. The battery charger is automatically enabled when a valid voltage is present on CHGIN . 34 OUT2 Output Feedback Sense for REG2. Connect this pin directly to the output node to connect the internal feedback network to the output voltage. 35 VP2 Power Input for REG2. Bypass to GP12 with a high quality ceramic capacitor placed as close as possible to the IC. 36 SW2 Switching Node Output for REG2. Connect this pin to the switching end of the inductor. 37 GP12 Power Ground for REG1 and REG2. Connect GA, GP12 and GP3 together at a single point as close to the IC as possible. 38 SW1 Switching Node Output for REG1. Connect this pin to the switching end of the inductor. 39 VP1 Power Input for REG1. Bypass to GP12 with a high quality ceramic capacitor placed as close as possible to the IC. 40 NC No Connect. Not internally connected. EP EP Exposed Pad. Must be soldered to ground on PCB. |
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