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ADP3198 Datasheet(PDF) 8 Page - ON Semiconductor |
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ADP3198 Datasheet(HTML) 8 Page - ON Semiconductor |
8 / 31 page ADP3198 Rev. 2 | Page 8 of 31 | www.onsemi.com Pin No. Mnemonic Description 20 IREF Current Reference Input. An external resistor from this pin to ground sets the reference current for IFB, IDELAY, ISS, IILIMIT, and ITTSENSE. 21 IMON Analog Output. Represents the total load current. 22 to 25 SW4 to SW1 Current Balance Inputs. Inputs for measuring the current level in each phase. The SW pins of unused phases should be left open. 26 NC No Connection. 27 to 30 PWM4 to PWM1 Logic-Level PWM Outputs. Each output is connected to the input of an external MOSFET driver such as the ADP3110A. Connecting the PWM4, and PWM3 outputs to VCC causes that phase to turn off, allowing the ADP3198 to operate as a 2-, 3-, or 4-phase controller. 31 VCC Supply Voltage for the Device. A 340 Ω resistor should be placed between the 12 V system supply and the VCC pin. The internal shunt regulator maintains VCC = 5 V. 32 to 39 VID7 to VID0 Voltage Identification DAC Inputs. These eight pins are pulled down to GND, providing a Logic 0 if left open. When in normal operation mode, the DAC output programs the FB regulation voltage from 0.5 V to 1.6 V (see Table 4). 40 VIDSEL VID DAC Selection Pin. The logic state of this pin determines whether the internal VID DAC decodes VID0 to VID7 as extended VR10 or VR11 inputs. |
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