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參數(shù)資料
| 型號(hào)： | LM621 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | LM621 Brushless Motor Commutator |
| 中文描述： | LM621無刷電機(jī)換向器 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 224K |
| 代理商： | LM621 |
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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| LM6211 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Low Noise, RRO Operational Amplifier with CMOS Input and 24V Operation |
| LM6211MF | 功能描述:運(yùn)算放大器 - 運(yùn)放 RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| LM6211MF/NOPB | 功能描述:運(yùn)算放大器 - 運(yùn)放 Low Noise RRO Op Amp w/ CMOS Inpt 24V RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| LM6211MFX | 功能描述:運(yùn)算放大器 - 運(yùn)放 RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| LM6211MFX/NOPB | 功能描述:運(yùn)算放大器 - 運(yùn)放 RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
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