Microchip Technology MCP1630 Bedienungsanleitung PDF herunterladen (Seite 11)

MCP1630 AUTOMOTIVE INPUT

TRIPLE OUTPUT CONVERTER

DEMO BOARD USER’S GUIDE

Chapter 2. Installation and Operation

2.1 INTRODUCTION

The MCP1630 Automotive Input Triple Output Converter Demo Board demonstrates

Microchip's high speed pulse width modulator (PWM) used for Automotive application.

When used in conjunction with a microcontroller, the MCP1630 will control the power

system duty cycle to provide regulated output voltage. The PIC12F683 microcontroller

is used to provide oscillator pulses at switching frequency of 250 kHz and set maximum

duty cycle. The MCP1630 generates duty cycle based on various external inputs.

External signals include the input oscillator pulses from PIC12F683, the reference

voltage and the feed back voltage. The output signal is a square-wave pulse given to

drive the MOSFET.

The PIC12F683 microcontroller is programmable, allowing the user to modify or

develop their own firmware routines to further evaluate the MCP1630 in this

application.

2.2 FEATURES

The MCP1630 Automotive Input Triple Output Converter Demo Board has the following

features:

• Compact size for a Triple output Converter

• Wide Input voltage range from 6.5V to 40V

• Programmable output voltage and ON/OFF control using the PIC microcontroller

• Provide line regulation, load regulation and cross regulation of ± 5% on V

OUT1

(3.3V), ± 5% on V

OUT2

(1.2V) and ± 10% on V

OUT3

(4.7V) for load variation from

50% to 100%

• High efficiency over entire operating input voltage range

• PIC12F683 is used to generate reference Voltage and Oscillator signal at 250 kHz

frequency at maximum duty cycle

• Proprietary features can be added by modifying the firmware contained in the

PIC12F683

• Factory programmed source code is available

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Microchip Technology MCP1630 Bedienungsanleitung Seite 11