L9177ATR datasheet(18/55 Pages) STMICROELECTRONICS

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1. Vdiagth_L < Vout < Vdiagth_H→ Open Load; Vout < Vdiagth_L→ Short to GND

2.5.13

Tachometer driver

Table 18. Tachometer driver electrical characteristics

Symbol

Parameter

Condition

Min

Typ

Max

Unit

Ioc

Overcurrent threshold

100

500

Ron

On resistance

I = 25 mA

Ilk_off

Leakage current

Vout = 18 V, Key = 0 V

µA

Ilk_on

Pull-Down diagnosis current

Vout = 18 V, Key = 5 V

100

µA

ton_off

Turn on-off delay

From CMD (serial or parallel) rising edge

µs

VOL

Open load output voltage

driver in OFF condition

0.46*VDD

0.5*VDD

0.54*VDD

Vdiagth_H (1) Diagnostic high threshold

Driver in OFF condition

0.54*VDD

0.6*VDD

0.66*VDD

Vdiagth_L (1) Diagnostic low threshold

Driver in OFF condition

0.36*VDD

0.4*VDD

0.44*VDD

Tmask

OFF diagnostic masking time

Guaranteed by scan

0.75

1.25

Tdcg_noise OFF diagnostic Deglitch filter time

Guaranteed by scan

2.16

3.6

5.04

µs

Tdcg

ON diagnostic Deglitch filter time

Guaranteed by scan

µs

1. Vdiagth_L < Vout < Vdiagth_H → Open Load; Vout < Vdiagth_L → Short to GND

2.5.14

Stepper motor driver

Table 19. Stepper motor driver electrical characteristics

Symbol

Parameter

Condition

Min

Typ

Max

Unit

Ioc

Overcurrent threshold

ON condition

0.85

RdsON

On resistance HS+LS

I out= 0.5 A,

T j= 150 °C, V B= 14 V

2.6

fstepper

Working frequency

Application info

kHz

Vout_off (1)(2)(3)

OUTA_B_C_D output voltage

OUTA short to OUTB; OUTC short to OUTD;

Stepper driver disable

0.44*VDD 0.5*VDD 0.54*VDD

Vdiagth_H

Diagnostic high threshold

Driver in OFF condition

0.54*VDD 0.6*VDD 0.66*VDD

Vdiagth_L

Diagnostic low threshold

Driver in OFF condition

0.36*VDD 0.4*VDD 0.44*VDD

IDSS_OUT

Output leakage current

Driver in OFF condition

µA

tscvb

Over current switch_off time

Guaranteed by scan

µs

trb

Rise output time

VB = 12 V, RI = 39 Ω

µs

tfb

Fall output time

VB = 12 V, RI = 39 Ω

µs

trb-a

Rise output time

Tamb = 25 °C,

VB = 12 V, RI = 39 Ω

µs

tfb-a

Fall output time

µs

tpHLb

Turn-off in/out delay time

VB = 12 V, RI = 39 Ω

µs

tpLHb

Turn-off in/out delay time

µs

Vreverse_HS

Reverse HS diode drop

Driver in OFF condition Iinjected= 0.5 A

1.5

Vreverse_LS

Reverse LS diode drop

Driver in OFF condition ISourced = 0.5 A

-1.5

L9177A

Electrical characteristics

DS12175 - Rev 5

page 18/55

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