参数资料
型号: MIC5011BM
厂商: Micrel Inc
文件页数: 9/12页
文件大小: 0K
描述: IC DRIVER MIN PARTS HI/LO 8SOIC
标准包装: 95
配置: 高端或低端
输入类型: 非反相
延迟时间: 25µs
配置数: 1
输出数: 1
电源电压: 4.75 V ~ 32 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOIC
包装: 管件
MIC5011
Applications Information (Continued)
15V
Micrel, Inc.
MIC5011
C2 6
MPSA05 3
1N4003 (2)
100k?
33pF
33k ? 1 V+ C1 8
2 Input Com 7
Source 1nF
1N4746
+ 100μF
90V
10mA
Control Input
4N35
100k?
4 Gnd
Gate 5
IRFP250
100nF
200V
15Vp-p, 20kHz
Squarewave
1N4003
1k?
Figure 7. High-Voltage
Bootstrapped Driver
1/4 HP, 90V
5BPB56HAA100
( GE )
M
diode limits the supply to 18V. When the MIC5011 is off,
power is supplied by a diode connected to a 15V supply. The
circuit of Figure 5 is put to good use as a barrier between
low voltage control circuitry and the 90V motor supply.
Half-Bridge Motor Driver (Figure 8). Closed loop control
of motor speed requires a half-bridge driver. This topology
presents an extra challenge since the two output devices
should not cross conduct (shoot-through) when switching.
Cross conduction increases output device power dissipa-
tion. Speed is also important, since PWM control requires
the outputs to switch in the 2 to 20kHz range.
The circuit of Figure 8 utilizes fast con?gurations for both
the top- and bottom-side drivers. Delay networks at each
input provide a 2 to 3μs dead time effectively eliminating
cross conduction. Two of these circuits can be connected
together to form an H-bridge for locked antiphase or sign/
magnitude control.
15V
1N5817
1N4148
22k ?
220pF
MIC5011
1 V+ C1 8
2 Input
Com 7
3 Source
C2 6
4 Gnd
Gate 5
100nF
+
1μF
1N4001 (2)
IRF541
M 10A Stalled
PWM
INPUT
15V
+
10μF
12V,
22k ?
10k ?
1nF
MIC5011
1 V+ C1 8
2 Input Com 7
3 Source C2 6
2N3904
4 Gnd
Gate 5
IRF541
Figure 8. Half-Bridge
Motor Driver
July 2005
9
MIC5011
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