TDA7272A データシートの表示（PDF） - STMicroelectronics

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TDA7272A

HIGH PERFORMANCE MOTOR SPEED REGULATOR

STMicroelectronics 

Figure 23: P.C. board and components layout of the circuits of Figg. 20, 21, 22.

TDA7272A

A

APPLICATION SUGGESTION (Fig. 20,21,22) - (For a 2000 r.p.m. 3 pole DC motor with RM = 16Ω)

Components

RS1

RS2

RL; CL

CD

RT; CT

RP1; RP2

CF

RA; CA

Recommended

value

1Ω

1.5Ω

22KΩ - 68nF

68nF

15KΩ - 47nF

47KΩ trim.

Polyester 100nF

220KΩ - 220nF

Purpose

Current sensing

tacho loop.

Current sensing

V/I loop.

Spike filtering.

Pulse transf.

Current source

programming to

obtain a 50%

duty cycle

Set of speed.

Optimization of

integrator ripple

and loop

response time.

Fast response

with no

overshoot.

If larger

Instability may

occur.

Slow V/I

regulator

response.

If smaller

Tacho loop do

not regulate

Motor regulator;

undercompens.

High output

ripple.

Low speed.

High speed

Lower ripple,

slower tacho

regulator

response.

Higher ripple,

faster response.

Depending on electrmechanical

system.

Allowed range

Min.

Max.

0

0

RMOT/9

33nF

67KΩ

100nF

30KW

0

10nF

470nF

10nF 470nF

13/16

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