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參數(shù)資料
| 型號： | LM621N |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | LM621 Brushless Motor Commutator |
| 中文描述： | BRUSHLESS DC MOTOR CONTROLLER, PDIP18 |
| 封裝： | PLASTIC, DIP-18 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 224K |
| 代理商： | LM621N |
TL/H/8679
L
August 1992
LM621 Brushless Motor Commutator
General Description
The LM621 is a bipolar IC designed for commutation of
brushless DC motors. The part is compatible with both
three- and four-phase motors. It can directly drive the power
switching devices used to drive the motor. The LM621 pro-
vides an adjustable dead-time circuit to eliminate ‘‘shoot-
through’’ current spiking in the power switching circuitry.
Operation is from a 5V supply, but output swings of up to
40V are accommodated. The part is packaged in an 18-pin,
dual-in-line package.
Features
Y
Adjustable dead-time feature eliminates current spiking
Y
On-chip clock oscillator for dead-time feature
Y
Outputs drive bipolar power devices (up to 35 mA base
current) or MOSFET power devices
Y
Compatible with three- and four-phase motors . . .
D Bipolar drive to delta- or Y-wound motors
D Unipolar drive to center-tapped Y-wound motors
D Supports 30- and 60-degree shaft position sensor
placements for three-phase motors
D Supports 90-degree sensor placement for four-phase
motors
Y
Directly interfaces to pulse-width modulator output(s)
via OUTPUT INHIBIT (PWM magnitude) and DIREC-
TION (PWM sign) inputs
Y
Direct interface to Hall sensors
Y
Outputs are current limited
Y
Undervoltage lockout
Connection Diagram
TL/H/8679–1
Order Number LM621N
See NS Package Number N18A
C
1995 National Semiconductor Corporation
RRD-B30M115/Printed in U. S. A.
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| LM6261M | High Speed Operational Amplifier |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM621N/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DC Motor Controller/Driver |
| LM621N/B+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DC Motor Controller/Driver |
| LM6221 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| LM6221H | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Speed Buffer |
| LM6221N | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Speed Buffer |
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