MC34921R2 Ver la hoja de datos (PDF) - Freescale Semiconductor

Número de pieza

componentes Descripción

fabricante

MC34921R2

H-BRIDGE MOTOR DRIVER AND POWER SUPPLY

Freescale Semiconductor 

DYNAMIC ELECTRICAL CHARACTERISTICS

DYNAMIC ELECTRICAL CHARACTERISTICS

Table 4. Dynamic Electrical Characteristics

Characteristics noted under conditions 16 V ≤ B+ ≤ 34 V, 0°C ≤ TA ≤ 70°C, and 0°C ≤ TJ ≤ 100°C unless otherwise noted.

Typical values noted reflect the approximate parameter means at TA = 25°C under nominal conditions unless otherwise noted.

Characteristic

Symbol

Min

Typ

Max

Unit

Serial Interface Timing(22)

Setup Time for CE to rising edge of SCLK (CL = 50 pF)

Hold Time for CE after rising edge of SCLK (CL = 50 pF)

Setup Time for MOSI to rising edge of SCLK (CL = 50 pF)

Hold Time for MOSI after rising edge of SCLK (CL = 50 pF)

Delay for MISO valid after rising edge of SCLK (CL = 50 pF)

Period for SCLK (CL = 50 pF)

Duty Cycle of SCLK

5.0 V Switching Regulator

t setup (CE)

15

–

–

ns

t hold (CE)

15

–

–

ns

t setup (MOSI)

15

–

–

ns

t hold ( MOSI)

15

–

–

ns

t delay (MISO)

–

35

55

ns

t period (SCLK)

125

–

750

ns

tduty (SCLK)

45

–

55

%

Switching Rise and Fall Time

Load Resistance = 100 Ω, B+ = 18 V

tr, tf

ns

10

30

50

3.3 V Switching Regulator

Switching Rise and Fall Time

Load Resistance = 100 Ω, B+ = 18 V

tr, tf

ns

10

16

50

Motor Drivers

Motor Drivers A and B Output Waveform Rise Time

R = 7.0 Ω, VDCX = (5.0 V) to (0.90 x B+), B+ = 18 V

tr

ns

100

175

300

Motor Driver C Output Waveform Rise Time

R = 25 Ω, VDCX = (5.0 V) to (0.90 x B+), B+ = 18 V

tr

ns

100

175

300

Output Waveform Fall Time

VDCX = (0.90 x B+) to 5.0 V, R = 7.0 Ω, B+ = 18 V

Crossover Dead Time (23)

Motor Driver C in Step Mode

tf

t dead

ns

100

–

300

15

600

2000

ns

Output Rise Time

VXPHASE = 5.0 V to 0.90 x B+, Rw = 20 Ω, B+ = 18 V

tr

ns

100

175

350

Output Fall Time

VXPHASE = 0.90 x B+ to 5.0 V, Rw = 20 Ω, B+ = 18 V

tf

ns

100

155

350

Delay from Phase Turn-Off to Counterphase Turn-On

tdelay (C)

ns

Rw = 20 Ω, 0.90 x B+ Rising to 0.90 x B+ Falling, B+ = 18 V Falling

0.0

300

400

Notes

22. See Figure 4, Serial Interface Timing, page 16.

23. This parameter is guaranteed by design but not production tested.

34921

14

Analog Integrated Circuit Device Data

Freescale Semiconductor

Share Link: