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參數(shù)資料
| 型號(hào)： | 5962-9168901MXA |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 2 A, CDIP28 |
| 封裝： | CERAMIC, DIP-28 |
| 文件頁數(shù)： | 3/23頁 |
| 文件大?。?/td> | 466K |
| 代理商： | 5962-9168901MXA |
www.ti.com
APPLICATION INFORMATION
Cross Conduction Prevention
EDGE
FINDER
SHIFT
REG
S
Q
R
S
Q
R
PUA
PDA
PULL
DOWN
PULL UP
FROM
DECODER
PWM
CLK
SLUS353B – NOVEMBER 2003 – REVISED APRIL 2007
The UC3625 inserts delays to prevent cross conduction due to overlapping drive signals. However, some
thought must always be given to cross conduction in output stage design because no amount of dead time can
prevent fast slewing signals from coupling drive to a power device through a parasitic capacitance.
The UC3625 contains input latches that serve as noise blanking filters. These latches remain transparent
through any phase of a motor rotation and latch immediately after an input transition is detected. They remain
latched for two cycles of the PWM oscillator. At a PWM oscillator speed of 20 kHz, this corresponds to 50
s to
100
s of blank time which limits maximum rotational speed to 100 kRPM for a motor with six transitions per
rotation or 50 kRPM for a motor with 12 transitions per rotation.
This prevents noise generated in the first 50
s of a transition from propagating to the output transistors and
causing cross-conduction or chatter.
The UC3625 also contains six flip flops corresponding to the six output drive signals. One of these flip flops is
set every time that an output drive signal is turned on, and cleared two PWM oscillator cycles after that drive
signal is turned off. The output of each flip flop is used to inhibit drive to the opposing output (Figure 7). In this
way, it is impossible to turn on driver PUA and PDA at the same time. It is also impossible for one of these
drivers to turn on without the other driver having been off for at least two PWM oscillator clocks.
Figure 7. Cross Conduction Prevention
11
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| 5962-9168902VYA | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 SPACE-RATE BRUSHLESS DC MOTOR CONTROLLER RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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| 5962-9169003MXA | 制造商:Analog Devices 功能描述:ADC Single SAR 12-bit Parallel 28-Pin CDIP 制造商:Analog Devices 功能描述:ADC SGL SAR 12-BIT PARALLEL 28CDIP - Rail/Tube 制造商:Rochester Electronics LLC 功能描述:IC, MONO 12-BIT ADC IC - Bulk 制造商:Analog Devices Inc. 功能描述:Analog to Digital Converters - ADC IC MONO 12-BIT ADC IC 制造商:Analog Devices 功能描述:CONVERTER - ADC |
| 5962-9169004M3C | 制造商:Exar Corporation 功能描述: |
| 5962-9169005M3A | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Analog Devices 功能描述: |
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