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參數(shù)資料
| 型號(hào)： | TDF5140A |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | Brushless DC motor drive circuit |
| 中文描述： | BRUSHLESS DC MOTOR CONTROLLER, 1 A, PDIP18 |
| 封裝： | SOT-102, PLASTIC, DIP-18 |
| 文件頁(yè)數(shù)： | 14/19頁(yè) |
| 文件大小： | 120K |
| 代理商： | TDF5140A |
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1999 March 15
14
Philips Semiconductors
Product specification
Brushless DC motor drive circuit
TDF5140A
Fig.7 Typical CAP-TI and V
MOT1
voltage waveforms in normal running mode.
If the chosen value of CAP-TI is too small oscillations can occur in certain positions of a blocked rotor. If the chosen value is too large, then it
is possible that the motor may run in the reverse direction (synchronously with little torque).
ok, full pagewidth
MGH318
VMOT 1
voltage
on CAP-TI
Other design aspects
There are other design aspects concerning the application
of the TDF5140A besides the commutation function. They
are:
Generation of the tacho signal FG
A built-in interface for a PG sensor
General purpose operational transconductance
amplifier (OTA)
Possibilities of motor control
Reliability.
FG
SIGNAL
The FG signal is generated in the TDF5140A by using the
zero-crossing of the motor EMF from the three motor
windings. Every zero-crossing in a (star connected) motor
winding is used to toggle the FG output signal. The FG
frequency is therefore half the commutation frequency.
All transitions indicate the detection of a zero-crossing
(except for PG). The negative-going edges are called FG
pulses because they generate an interrupt in a controlling
microprocessor.
The accuracy of the FG output signal (jitter) is very good.
This accuracy depends on the symmetry of the motor's
electromagnetic construction, which also effects the
satisfactory functioning of the motor itself.
Example: A 3-phase motor with 6 magnetic pole-pairs at
1500 rpm and with a full-wave drive has a commutation
frequency of 25
×
6
×
6 = 900 Hz, and generates a tacho
signal of 450 Hz.
PG
SIGNAL
The accuracy of the PG signal in applications such as VCR
must be high (phase information). This accuracy is
obtained by combining the accurate FG signal with the PG
signal by using a wide tolerance external PG sensor. The
external PG signal (PG IN) is only used as an indicator to
select a particular FG pulse. This pulse differs from the
other FG pulses in that it has a short LOW-time of 18
μ
s
after a HIGH-to-LOW transition. All other FG pulses have
a 50% duty factor (see Fig.8).
For more information also see “application note
EIE/AN 93014”
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| TDF5140AP | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Brushless DC motor drive circuit |
| TDF5140AP/C1,112 | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Brushless DC Motor Controller 18-Pin 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 |
| TDF5140AT/C1,118 | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Brushless DC Motor Controller 18-Pin 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 |
| TDF5242 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Brushless DC motor drive circuit |
| TDF5242T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Brushless DC motor drive circuit |
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