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参数资料
| 型号： | MC34921AE |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 14/36页 |
| 文件大小： | 0K |
| 描述： | IC MOTOR DRVR PWM DC DUAL 64LQFP |
| 标准包装： | 800 |
| 应用： | DC 电机驱动器，步进电机驱动器，H 桥式 |
| 输出数： | 2 |
| 电流 - 输出： | ±4.5A |
| 电压 - 负载： | 0 V ~ 38 V |
| 电源电压： | 4.8 V ~ 5.2 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-LQFP 裸露焊盘 |
| 供应商设备封装： | 64-LQFP EP（10x10） |
| 包装： | 散装 |
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DYNAMIC ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
Table 4. Dynamic Electrical Characteristics
Characteristics noted under conditions 16 V ≤ B+ ≤ 34 V, 0 ° C ≤ T A ≤ 70 ° C, and 0 ° C ≤ T J ≤ 100 ° C unless otherwise noted.
Typical values noted reflect the approximate parameter means at T A = 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 (C L = 50 pF)
Hold Time for CE after rising edge of SCLK (C L = 50 pF)
Setup Time for MOSI to rising edge of SCLK (C L = 50 pF)
Hold Time for MOSI after rising edge of SCLK (C L = 50 pF)
Delay for MISO valid after rising edge of SCLK (C L = 50 pF)
Period for SCLK (C L = 50 pF)
Duty Cycle of SCLK
t setup ( CE )
t hold ( CE )
t setup (MOSI)
t hold (MOSI)
t delay (MISO)
t period (SCLK)
t duty (SCLK)
15
15
15
15
–
125
45
–
–
–
–
35
–
–
–
–
–
–
55
750
55
ns
ns
ns
ns
ns
ns
%
5.0 V Switching Regulator
Switching Rise and Fall Time
t r , t f
ns
Load Resistance = 100 ? , B+ = 18 V
10
30
50
3.3 V Switching Regulator
Switching Rise and Fall Time
t r , t f
ns
Load Resistance = 100 ? , B+ = 18 V
10
16
50
Motor Drivers
Motor Drivers A and B Output Waveform Rise Time
R = 7.0 ? , V DCX = (5.0 V) to (0.90 x B+), B+ = 18 V
Motor Driver C Output Waveform Rise Time
R = 25 ? , V DCX = (5.0 V) to (0.90 x B+), B+ = 18 V
t r
t r
100
100
175
175
300
300
ns
ns
Output Waveform Fall Time
t f
ns
V DCX = (0.90 x B+) to 5.0 V, R = 7.0 ? , B+ = 18 V
100
–
300
Crossover Dead Time (23)
t dead
15
600
2000
ns
Motor Driver C in Step Mode
Output Rise Time
t r
ns
V XPHASE = 5.0 V to 0.90 x B+, R w = 20 ? , B+ = 18 V
Output Fall Time
V XPHASE = 0.90 x B+ to 5.0 V, R w = 20 ? , B+ = 18 V
Delay from Phase Turn-Off to Counterphase Turn-On
R w = 20 ? , 0.90 x B+ Rising to 0.90 x B+ Falling, B+ = 18 V Falling
t f
t delay (C)
100
100
0.0
175
155
300
350
350
400
ns
ns
Notes
23. This parameter is guaranteed by design but not production tested.
34921
Analog Integrated Circuit Device Data
14
Freescale Semiconductor
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