MCP621 datasheet(28/68 Pages) MICROCHIP

Il numero della parte	MCP621

Spiegazioni elettronici	20 MHz, 200 μV Op Amps with mCal

PDF	68 Pages

Scroll/Zoom	100%

Produttore elettronici	MICROCHIP [Microchip Technology]

Homepage	http://www.microchip.com

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28 / 68 page

MCP621/1S/2/3/4/5/9

DS20002188E-page 28

 2009-2021 Microchip Technology Inc. and its subsidiaries

4.7.3

H-BRIDGE DRIVER

Figure 4-15 shows the MCP622 dual op amp used as

a H-bridge driver. The load could be a speaker or a DC

motor.

FIGURE 4-15:

H-Bridge Driver.

This circuit automatically makes the noise gains (GN)

equal, when the gains are set properly, so that the

frequency responses match well (in magnitude and in

phase). Equation 4-11 shows how to calculate RGT and

RGB so that both op amps have the same DC gains;

GDM needs to be selected first.

EQUATION 4-11:

Equation 4-12 gives the resulting Common mode and

Differential mode output voltages.

EQUATION 4-12:

VIN

VOT

RGB

VOB

VDD/2

RGT

½ MCP622

GDM

VOT VOB

–

VIN VDD 2



–

-------------------------------- 2 V/V





RGT

GDM 2



 1

–

---------------------------------

RGB

GDM 2



-------------------

VOT V

---------------------------

VDD

-----------

VOT V

–

GDM VIN

VDD

-----------

–





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