MCP1631 Просмотр технического описания (PDF) - Microchip Technology

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MCP1631

High-Speed, Pulse Width Modulator

Microchip Technology 

MCP1631/HV/MCP1631V/VHV

Functional Block Diagram(1)

MCP1631HV/VHV High Speed PIC PWM

VIN

+3.3V or +5.0V

VDD

LDO

250 mA

AVDD_OUT / AVDD_IN

SHDN

Shutdown Control

A3 Remains On

Internal Regulator for MCP1631HV and MCP1631VHV

Options Only; For MCP1631 and MCP1631V AVDD_IN is input

Internal

1.2V VREF

VDD

Overvoltage Comp

- w/ Hysteresis

C2

+

OVIN

PVDD

VDD

OSCDIS

100 kΩ

0.1 µA

OT

OSCIN

VEXT

UVLO

S

VDD

Q

PGND

CS/VRAMP

COMP

FB

VREF

VDD

-

A1

+

AGND

VDD

+

C1

R

-

Q

10R

100 kΩ

VDD

R

ISIN

A2

R

2R

2.7V Clamp

R

Remove for MCP1631V

and MCP1631VHV Options

VDD

A3

ISOUT

VSIN

Note 1: For Shutdown control, amplifier A3 remains functional so

battery voltage can be sensed during discharge phase.

2: For HV options, internal Low Drop Out Regulator provides

+3.3V or +5.0V bias to VDD.

VSOUT

DS22063B-page 4

© 2008 Microchip Technology Inc.

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