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参数资料
| 型号： | MC34921AER2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 11/36页 |
| 文件大小： | 0K |
| 描述： | IC MOTOR DRVR PWM DC DUAL 64LQFP |
| 标准包装： | 1,500 |
| 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： | 带卷 (TR) |
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STATIC ELECTRICAL CHARACTERISTICS
Table 3. Static Electrical Characteristics (continued)
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
Supervisor Circuitry
Minimum Function B+ for Charge Pump, Oscillator Up
B+
V
Reset/Fault Registers Valid (10)
Minimum Function V 5.0 for RST Operational
V 5.0 RST
9.0
–
–
V
RST V OL ≤ 0.05 V @ 1.0 mA
2.0
–
–
Minimum Function V 3.3 for RST Operational
V 3.3 RST
V
RST V OL ≤ 0.05 V @ 1.0 mA (10)
RST Low Voltage (11)
I RST ≤ 5.0 mA
RST V 5.0 Threshold
V OL
2.0
–
–
0.1
–
0.25
V
V
V 5.0 Rising
V 5.0 Falling
V 5.0 t+
V 5.0 t –
–
4.5
4.65
4.6
4.75
4.70
RST Hysteresis for V 5.0
V HYSV5.0
10
50
–
mV
RST V 3.3 Threshold
V
V 3.3 Rising
V 3.3 Falling
V 3.3 t+
V 3.3 t –
–
2.8
2.9
2.9
3.15
3.0
RST Hysteresis for V 3.3
V HYS_3.3
10
15
–
mV
RST V CORE Threshold
%V CORE_
V CORE Falling
RST Hysteresis for V CORE
Overtemperature Junction Temperature
T J Rising
V CORE
V HYS CORE
T J (OVER)
85
–
140
86
10
–
90
–
–
NOM
mV
° C
Overtemperature Hysteresis (12)
T J (HYS)
° C
T J Falling
10
–
30
Thermal Warning (12)
T W
T J -30
–
T J -20
° C
B+ Undervoltage Threshold to Assert RST
B+ (FAULT)
V
V 5.0 = +5.0 V, B+ Falling
12
12.75
13.5
B+ Undervoltage Threshold Hysteresis (13)
B+ FAULT (HYS)
1.0
1.5
2.0
V
Minimum B+ Necessary to Clear B+ Fault
B+ RECOVERY
V
V 5.0 = +5.0 V, B+ Rising
–
–
15.25
Notes
10.
11.
12.
13.
If any of these conditions for this not is true, then RST is activated until all operating conditions are met.
The RST terminal uses an external pull-up, which may be to 5.0 V or 3.3 V.
Guaranteed by design.
Alternately, the minimum B+ fault threshold voltage must not be lower than 12 V, and the B+ fault clear voltage must not be higher than
15.25 V. The hysteresis may be greater than 2.0 V if this requirement is met.
34921
Analog Integrated Circuit Device Data
Freescale Semiconductor
11
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