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PORTGPA Datasheet(PDF) 39 Page - Microchip Technology |
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PORTGPA Datasheet(HTML) 39 Page - Microchip Technology |
39 / 222 page 2013 Microchip Technology Inc. DS22331A-page 39 MCP19111 6.4 Current Sense DC Gain DC gain can be added to the sensed inductor current to allow it to be read by the ADC. The amount of DC gain added is controlled by the CSDGCON register. Adding DC gain to the current sense signal used by the control loop may also be needed in some multi-phase systems to account for device and component differences. The CSDGEN bit determines if the gained current sense signal is added back to the AC current signal (see Register 6-4). If the CSDGEN bit is cleared, DC gain can still be added, but the gained signal is not added back to the AC current signal. REGISTER 6-4: CSDGCON: CURRENT SENSE DC GAIN CONTROL REGISTER R/W-0 U-0 U-0 U-0 R/W-x R/W-x R/W-x R/W-x CSDGEN — — — Reserved CSDG2 CSDG1 CSDG0 bit 7 bit 0 Legend: R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ -n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown bit 7 CSDGEN: Current Sense DC Gain Enable bit 1 = DC gain current sense signal used in control loop. 0 = DC gain current sense signal only read by ADC. bit 6-4 Unimplemented: Read as ‘0’ bit 3 Reserved bit 2-0 CSDG<2:0>: Current Sense DC Gain Setting bits 000 = 19.5 dB 001 = 21.8 dB 010 = 24.1 dB 011 = 26.3 dB 100 = 28.6 dB 101 = 30.9 dB 110 = 33.2 dB 111 = 35.7 dB |
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