L9935(1999) Ver la hoja de datos (PDF) - STMicroelectronics

Número de pieza

componentes Descripción

Fabricante

L9935
(Rev.:1999)

TWO-PHASE STEPPER MOTOR DRIVER

STMicroelectronics 

L9935

Figure 2. Typical average load current dependence on RSense.

I

D99AT418

A

typical current limitation of high side transistor

1.8

limit recommended for usual application

1.1

1

suggested range of operation

0.8

0.6

0.4

ILL

0.2

ILH

IHL

0.075

0

R

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Ω

Full Bridge Function

Figure 3. Displays a full bridge including the current sense circuit.

VS

bit3, (bit0)

DRIVE

LOGIC

M11

D11

D11

A1

M21

D21

D21

A2

M12

LOAD

M22

D12

D12

D22

D22

bit5, (bit2)

bit4, (bit1)

-

τ

COMP1

+

CURRENT

LOGIC

INHIBIT

ON HH

CURRENT ADJUST

6/19

R1

R1 EXTERNAL

SENSE RESISTOR

D99AT419

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