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| 型号： | A1448EEWLT-P |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 4/9页 |
| 文件大小： | 0K |
| 描述： | IC MOTOR DVR BLDC FULLBRDG MLP |
| 产品变化通告： | Pre-EOL Notice 07/Feb/2012 |
| 标准包装： | 1 |
| 应用： | DC 电机驱动器，无刷（BLDC） |
| 输出数： | 1 |
| 电流 - 输出： | ±200mA |
| 电源电压： | 1.8 V ~ 4.2 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-XFDFN 裸露焊盘 |
| 供应商设备封装： | 6-MLP/DFN 裸露焊盘（1.5x2） |
| 包装： | 标准包装 |
| 产品目录页面： | 1140 (CN2011-ZH PDF) |
| 其它名称： | 620-1274-6 |
Low-Voltage, Full-Bridge Brushless DC Motor Driver with
A1448
Integrated Hall Sensor IC, PWM Speed Control, Soft-Switching,
and Reverse Battery and Short Circuit Protection
OPERATING CHARACTERISTIC S Valid ove r supply voltage and ambient temperature ranges, unless otherwise noted
Characteristics
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
Electrical Characteristics
Supply Voltage
Extended Range of Supply Voltage 1
Supply Current
V DD
V DDE
I DD
T J < T J (max)
T J < T J (max)
V IN >V INHI , T A = 25°C, no load
V IN < V INLO , T A = 25°C
I OUT = 70 mA, V DD = 2 V, T A = 25°C
2.0
1.8
–
–
–
–
–
4
–
3.9
4.2
4.2
6
10
–
V
V
mA
μ A
Ω
Total Output
On-Resistance 2
R DS(on)
I OUT = 70 mA, V DD = 3 V, T A = 25°C
–
2.6
–
Ω
I OUT = 70 mA, V DD = 4 V, T A = 25°C
–
2.2
–
Ω
Reverse Battery Current
CONTROL Pin Input Threshold
CONTROL Pin Input Current
CONTROL Pin Input Frequency
CONTROL Prebraking Time 3
Thermal Shutdown Limit
I RDD
V INHI
V INLO
I IN
f PWM
t PB
T JTSD
V RDD = –4.2 V
V IN = 3.0 V
Device is active
–
0.7 × V DD
–
–
100
–
–
–
–
–
1.0
384
–
165
–10
–
0.2 × V DD
5
800
2.5
–
mA
V
V
μ A
kHz
ms
°C
Thermal Shutdown Hysteresis
T JTSD(HYS) Device is active
–
20
–
°C
Magnetic Characteristics 4
B OP
–
35
75
G
Magnetic Switchpoints
B RP
B HYS
–75
–
–35
70
–
–
G
G
Output Polarity
VOUT1
VOUT2
B < B RP
B > B OP
B < B RP
B > B OP
–
–
–
–
LOW
HIGH
HIGH
LOW
–
–
–
–
V
V
V
V
1 Extended V DD range affects R DS(on) and B x .
2 Total Output On-Resistance = R DS(on)Q1 + R DS(on)Q4 , or R DS(on)Q2 + R DS(on)Q3 , where Qx refers to the internal full-bridge transistors.
3 Device initiates braking algorithm if the CONTROL pin is pulled to GND for longer than the maximum specified CONTROL Prebraking Time.
4 1 G (gauss) = 0.1 mT (millitesla).
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
3
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