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MIC5021 PDF预览

MIC5021

更新时间: 2024-09-17 14:53:07
品牌 Logo 应用领域
美国微芯 - MICROCHIP /
页数 文件大小 规格书
24页 1475K
描述
The MIC5021 high-side MOSFET gate driver is designed to operate at frequencies up to 100 kHz (5 kH

MIC5021 数据手册

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MIC5021  
High-Speed, High-Side MOSFET Driver with Charge Pump  
and Overcurrent Limit  
Features  
General Description  
• 12V to 36V Operation  
The MIC5021 high-side MOSFET driver is designed to  
operate at frequencies up to 100 kHz (5 kHz PWM for  
2% to 100% duty cycle) and is an ideal choice for high  
speed applications such as motor control, SMPS  
(switch mode power supplies), and applications using  
IGBTs. The MIC5021 can also operate as a circuit  
breaker with or without automatic retry.  
• 550 ns Rise/Fall Time Driving 2000 pF  
• TTL-Compatible Input with Internal Pull-Down  
Resistor  
• Overcurrent Limit  
• Gate-to-Source Protection  
• Internal Charge Pump  
A rising or falling edge on the input results in a current  
source pulse or sink pulse on the gate output. This out-  
put current pulse can turn on a 2000 pF MOSFET in  
approximately 550 ns. The MIC5021 then supplies a  
limited current (<2 mA), if necessary, to maintain the  
output state.  
• 100 kHz Operation Guaranteed Over Full Tem-  
perature and Operating Voltage Range  
• Compatible with Current-Sensing MOSFETs  
• Current-Source Drive Reduces EMI  
Applications  
• Lamp Control  
An overcurrent comparator with a trip voltage of 50 mV  
makes the MIC5021 ideal for use with a current-sens-  
ing MOSFET. An external low value resistor may be  
used instead of a sensing MOSFET for more precise  
overcurrent control. An optional external capacitor  
placed from the CT pin to ground may be used to con-  
trol the current shutdown duty cycle (dead time) from  
20% to <1%. A duty cycle from 20% to about 75% is  
possible with an optional pull-up resistor from CT to  
• Heater Control  
• Motor Control  
• Solenoid Switching  
• Switch-Mode Power Supplies  
• Circuit Breaker  
VDD. Additional parts of the MIC502x family include the  
MIC5020 low-side driver and the MIC5022 half-bridge  
driver with a cross-conduction interlock. The MIC5021  
is available in 8-pin SOIC and plastic DIP packages.  
Typical Application Circuit  
MIC5021  
PDIP & SOIC  
High-Side Driver with Overcurrent Trip and Retry  
+12V to +36V  
MIC5021  
1
2
3
4
8
7
6
10μF  
TTL INPUT  
V
V
DD  
BOOST  
N-CHANNEL  
INPUT  
GATE  
POWER MOSFET  
C
SENSE-  
T
2.7  
nF  
OPTIONAL*  
SENSE+ 5  
GND  
RSENSE  
= 50mV  
RSENSE  
ITRIP  
LOAD  
* INCREASES TIME BEFORE RETRY  
2016 Microchip Technology Inc.  
DS20005677A-page 1  

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