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RT8167A Datasheet(PDF) 2 Page - Richtek Technology Corporation |
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RT8167A Datasheet(HTML) 2 Page - Richtek Technology Corporation |
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2 / 40 page  RT8167A ® DS8167A-00 January 2012 www.richtek.com 2 © Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. Functional Pin Description Pin No. Pin Name Pin Function 1 ISEN1P Positive Current Sense Input of CORE VR 2 ISEN1N Negative Current Sense Input of CORE VR 3 COMP CORE VR Compensation. This pin is the output node of the error amplifier. 4 FB CORE VR Feedback. This is the negative input node of the error amplifier. 5 RGND Return Ground for CORE VR. This pin is the negative input for differential remote voltage sensing. 6 IMON Current Monitor Output of CORE VR. The output voltage VIMON of this pin is proportional to the output current. For digital output current reporting, detailed VIMON is generated by built-in ADC. 7 IMONFB This pin is used to externally set the current monitor output gain of CORE VR. Connect this pin with one resistor RIMONFB to CORE VCC_SENSE while IMON pin is connected to ground with another resistor, RIMON. The current monitor output gain can be set by the ratio of these two resistors. 8 DRPEN Droop Enable Mode Setting of CORE VR. An internal 80 μA current source is connected to the DRPEN pin and flows out of this pin for 10 μs. Connect this pin to VCC to enable droop function. Connect this pin to GND to disable droop function. 9 OFS Output Voltage No-Load Offset Setting of CORE VR. Connect to a resistive voltage divider from VCC to GND to set the pin voltage VOFS for offset setting. Connect this pin to GND for no offset setting. 10 OFSA Output Voltage No-Load Offset Setting of GFX VR. Connect to a resistive voltage divider from VCC to GND to set the pin voltage VOFSA for offset setting. Connect this pin to GND for no offset setting. Pin Configurations WQFN-48L 6x6 (TOP VIEW) ISEN1P FB COMP VCC GFXPS2 OFSA OFS DRPEN IMONFB RGND IMON ISEN1N ISENAP FBA COMPA VRA_READY DRPENA VDIO VCLK IMONFBA RGNDA IMONA ISENAN GND 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 36 35 34 33 32 31 30 29 28 27 26 25 37 38 39 40 41 42 43 44 45 46 47 48 49 ALERT |
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