Microchip Technology MCP1630 Manual de usuario descargar pdf (Pagina 9)

MCP1630 AUTOMOTIVE INPUT

TRIPLE OUTPUT CONVERTER

DEMO BOARD USER’S GUIDE

Chapter 1. Product Overview

1.1 INTRODUCTION

The proliferation of distributed power supplies is expected to accelerate their use in

future generation cars and continue to incorporate increasingly complex electronic

systems. Distributed power supplies or "point-of-load" power supplies are being used

increasingly through out. These power supply units (PSUs) are responsible for

stepping up (or down) the input bus voltage, to power a multitude of electronic

subsystems. Examples of these electronic systems are collision avoidance radar,

adaptive cruise control, tire pressure monitoring, navigation systems, hands-free

cellular phones, and other wireless connectivity.

The majority of mid- to high-end automobiles produced today come with a DVD-based

GPS navigation system as standard equipment. However, designing a power supply to

handle all the different voltage rails within such a system can prove to be as complex

as designing the power-supply system for a notebook PC. The 5V and 3.3V rails are

typically the system bus. The 1.5V and 1.2V rails are used to power the CPU and

DSP-core voltages, respectively. The power levels of these two rails are usually

between 3W and 5W each.

Automotive subsystems with their inherent high voltage transients and high efficiency

requirements place increasing demands on power supply designs. These supplies

must provide high power, high efficiency and low noise from a very compact footprint

and must maintain a high efficiency over a wide range of operational input voltages.

The MCP1630/MCP1630V High-Speed, Microcontroller-Adaptable Pulse Width

Modulator is capable of maintaining output regulation with no adverse effects on sys-

tem performance or reliability. The MCP1630 Automotive Input Triple Output Converter

Demo Board provides a better choice for automotive application design and providing

high efficiency and also providing a tight Line, Load and Cross regulation for the three

outputs.

This chapter covers the following topics.

• What is the MCP1630 Automotive Input Triple Output Converter Demo Board?

• What the MCP1630 Automotive Input Triple Output Converter Demo Board Kit

includes.

FIGURE 1-1: MCP1630 Automotive Input Triple Output Converter Demo Board

Block Diagram.

MCP1630/V High-

Speed, Microcontroller -

Adaptable, Pulse width

Feedback

Loop

Input

PIC12F683 for Osc Pulses, Reference

Voltage and ON/OFF Control

Voltage

Regulator

SEPIC

Converter

Load

3.3V/1.2AV

1.2V/600 mA

4.7V/150 mA

Voltage

6.5V to 40V

Modulator

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 24 25

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