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MCP1631VHVT-E/SS Datasheet(PDF) 16 Page - Microchip Technology |
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MCP1631VHVT-E/SS Datasheet(HTML) 16 Page - Microchip Technology |
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16 / 34 page  MCP1631/HV/MCP1631V/VHV DS22063B-page 16 © 2008 Microchip Technology Inc. 3.7 Analog Ground (AGND) Quiet or analog ground, connect to analog ground plane to minimize noise on sensitive MCP1631 circuitry. 3.8 No Connection (NC) No connection. 3.9 Input Voltage (VIN) High voltage input for MCP1631HV/MCP1631VHV devices, operates from 3.5V to 16V input supply. 3.10 Analog supply Input (AVDD_IN) Analog bias input, minimum 3.0V to 5.5V operation for MCP1631/MCP1631V devices. 3.11 Analog Supply Output (AVDD_OUT) Regulated VDD output used to power internal MCP1631 HV/MC P 16 31VHV a nd extern al microcontroller, supplies up to 250 ma of bias current at 3.3V or 5.0V regulated low drop out rail. 3.12 Voltage Sense Input (VSIN) Voltage sense amplifier (A3) input, connect to high impedance battery voltage resistor divider to sense battery voltage with minimal loading. 3.13 Current Sense Input (ISIN) Connect to SEPIC secondary side sense resistor to develop a regulated current source used to charge multi-chemistry batteries. 3.14 Voltage Sense Output (VSOUT) Voltage sense amplifier output, connect to microcontroller analog to digital converter to measure battery voltage. 3.15 Current Sense Output (ISOUT) Current sense amplifier output, connect to error amplifier (A1) inverting input (FB) to regulate SEPIC output current. 3.16 Error Amplifier Output (COMP) Error amplifier (A1) output, connect control loop compensation from FB input to COMP output pin. 3.17 Feedback (FB) Error amplifier input (A1), connect to current sense output amplifier (A2) to regulate current. 3.18 Current Sense or Voltage Ramp (CS/VRAMP) For MCP1631/MCP1631HV applications, connect to low side current sense of SEPIC switch for current mode control and peak current limit. For MCP1631/ MCP1631HV application, connect artificial ramp voltage to VRAMP input for voltage mode PWM control. 3.19 Power VDD (PVDD) Power VDD input, VEXT gate drive supply input, connect to +5.0V or +3.3V supply for driving external MOSFET. 3.20 External Driver (VEXT) High current driver output used to drive external MOSFET at high frequency, capable of 1A peak currents with +5.0V PVDD. 3.21 Exposed PAD 4x4 QFN (EP) There is an internal electrical connection between the Exposed Thermal Pad (EP) and the AGND pin; they must be connected to the same potential on the Printed Circuit Board (PCB). |
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