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參數(shù)資料
| 型號： | TDA5145TS |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 運動控制電子 |
| 英文描述： | Brushless DC motor drive circuit |
| 中文描述： | BRUSHLESS DC MOTOR CONTROLLER, 2.5 A, PDSO24 |
| 文件頁數(shù)： | 14/24頁 |
| 文件大?。?/td> | 249K |
| 代理商： | TDA5145TS |
June 1994
14
Philips Semiconductors
Product specification
Brushless DC motor drive circuit
TDA5145
Fig.10 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).
Other design aspects
There are other design aspects concerning the application
of the TDA5145 besides the commutation function. They
are:
Generation of the tacho signal FG
General purpose operational transconductance
amplifier (OTA)
Motor control
Direction function
Brake function
Reliability.
FG
SIGNAL
The FG signal is generated in the TDA5145 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.
The accuracy of the FG output signal 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.
T
HE
O
PERATIONAL
T
RANSCONDUCTANCE
A
MPLIFIER
(OTA)
The OTA is an uncommitted amplifier with a high output
current (40 mA) that can be used as a control amplifier.
The common mode input range includes ground (GND)
and rises to V
P
1.7 V. The high sink current enables the
OTA to drive a power transistor directly in an analog
control amplifier.
Although the gain is not extremely high (0.3 S), care must
be taken with the stability of the circuit if the OTA is used
as a linear amplifier as no frequency compensation has
been provided.
The convention for the inputs (inverting or not) is the same
as for a normal operational amplifier: with a resistor (as
load) connected from the output (AMP OUT) to the positive
supply, a positive-going voltage is found when the
non-inverting input (+AMP IN) is positive with respect to
the inverting input (
AMP IN). Confusion is possible
because a ‘plus’ input causes less current, and so a
positive voltage.
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相關代理商/技術參數(shù) |
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| TDA5145TS/C1,518 | 功能描述:BLDC MOTOR CONTROLLER RoHS:是 類別:集成電路 (IC) >> PMIC - 電機和風扇控制器，驅動器 系列:- 標準包裝:1 系列:- 應用:直流電機驅動器，步進電機驅動器 評估套件:- 輸出數(shù):1 或 2 電流 - 輸出:750mA 電壓 - 負載:10 V ~ 40 V 電源電壓:4.5 V ~ 5.5 V 工作溫度:-20°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-BFSOP（0.295"，7.50mm 寬） 供應商設備封裝:24-SOP 包裝:Digi-Reel® 其它名稱:MTS62C19A-HS105DKR |
| TDA5146T | 制造商:NXP Semiconductors 功能描述: |
| TDA5147CH | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:12 V Voice Coil Motor VCM driver and spindle motor drive combination chip |
| TDA5147K | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:12 V Voice Coil Motor VCM driver and spindle motor drive combination chip |
| TDA5149 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:12 V Voice Coil Motor VCM driver and spindle motor pre-driver combination chip |
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