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參數(shù)資料
| 型號(hào)： | TDA1085C |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | Universal Motor Speed Controller(通用電機(jī)速度控制器) |
| 中文描述： | UNIVERSAL MOTOR CONTROLLER, 0.2 A, PDIP16 |
| 封裝： | PLASTIC, DIP-16 |
| 文件頁(yè)數(shù)： | 4/12頁(yè) |
| 文件大?。?/td> | 102K |
| 代理商： | TDA1085C |
TDA1085C
http://onsemi.com
4
GENERAL DESCRIPTION
The TDA 1085C triggers a triac accordingly to the speed
regulation requirements. Motor speed is digitally sensed by
a tachogenerator and then converted into an analog voltage.
The speed set is externally fixed and is applied to the
internal linear regulation input after having been submitted
to programmable acceleration ramps. The overall result
consists in a full motor speed range with two acceleration
ramps which allow efficient washing machine control
(Distribute function).
Additionally, the TDA 1085C protects the whole system
against AC line stop or variations, overcurrent in the motor
and tachogenerator failure.
INPUT/OUTPUT FUNCTIONS
(Refer to Figures 1 and 8)
Voltage Regulator (Pins 9 and 10)
This is a parallel type regulator able to sink a large amount
of current and offering good characteristics. Current flow is
provided from AC line by external dropping resistors R1,
R2, and rectifier: This half wave current is used to feed a
smothering capacitor, the voltage of which is checked by the
IC.
When VCC is reached, the excess of current is derived by
another dropping resistor R10 and by Pin 10. These three
resistors must be determined in order:
To let 1.0 mA flow through Pin 10 when AC line is
minimum and VCC consumption is maximum (fast
ramps and pulses present).
To let V10 reach 3.0 V when AC line provides
maximum current and VCC consumption is minimum
(no ramps and no pulses).
All along the main line cycle, the Pin 10 dynamic range
must not be exceeded unless loss of regulation.
An AC line supply failure would cause shut down.
The double capacitive filter built with R1 and R2 gives an
efficient VCC smoothing and helps to remove noise from set
speeds.
Speed Sensing (Pins 4, 11, 12)
The IC is compatible with an external analog speed
sensing: its output must be applied to Pin 4, and Pin 12
connected to Pin 8.
In most of the applications it is more convenient to use
a digital speed sensing with an inexpensive
tachogenerator which doesn
′
t need any tuning. During
every positive cycle at Pin 12, the capacitor CPin 11 is
charged to almost VCC and during this time, Pin 4
delivers a current which is 10 times the one charging CPin
11. The current source gain is called G and is tightly
specified, but nevertheless requires an adjustment on
RPin 4. The current into this resistor is proportional to
CPin 11 and to the motor speed; being filtered by a
capacitor, VPin 4 becomes smothered and represents the
“true actual motor speed”.
To maintain linearity into the high speed range, it is
important to verify that CPin 11 is fully charged: the internal
source on Pin 11 has 100 K
impedance. Nevertheless
CPin 11 has to be as high as possible as it has a large influence
on FV/C temperature factor. A 470 K
resistor between
Pins 11 and 9 reduces leakage currents and temperature
factor as well, down to neglectable effects.
Pin 12 also has a monitoring function: when its voltage is
above 5.0 V, the trigger pulses are inhibited and the IC is
reset. It also senses the tachogenerator continuity, and in
case of any circuit aperture, it inhibits pulse, avoiding the
motor to run out of control. In the TDA 1085C, Pin 12 is
negatively clamped by an internal diode which removes the
necessity of the external one used in the former circuit.
Ramp Generator (Pins 5, 6, 7)
The true Set Speed value taken in consideration by the
regulation is the output of the ramp generator (Pin 7). With
a given value of speed set input (Pin 5), the ramp generator
charges an external capacitor CPin 7 up to the moment VPin 5
(set speed) equals VPin 4 (true speed), see Figure 2. The IC
has an internal charging current source of 1.2mA and
delivers it from 0 to 12 V at Pin 7. It is the high acceleration
ramp (5.0 s typical) which allows rapid motor speed changes
without excessive strains on the mechanics. In addition, the
TDA 1085C offers the possibility to break this high
acceleration with the introduction of a low acceleration
ramp (called Distribution) by reducing the Pin 7 source
current down to 5.0
μ
A under Pin 6 full control, as shown by
following conditions:
Presence of high acceleration ramp VPin 5 > VPin 4
Distribution occurs in the VPin 4 range (true motor
speed) defined by VPin 6
For two fixed values of VPin 5 and VPin 6, the motor
speed will have high acceleration, excluding the time for
VPin 4 to go from VPin 6 to two times this value, high
acceleration again, up to the moment the motor has
reached the set speed value, at which it will stay, see
Figure 3.
Should a reset happen (whatever the cause would be),
the above mentioned successive ramps will be fully
reprocessed from 0 to the maximum speed. If VPin 6 = 0,
only the high acceleration ramp occurs.
To get a real zero speed position, Pin 5 has been designed
in such a way that its voltage from 0 to 80 mV is interpreted
as a true zero. As a consequence, when changing the speed
set position, the designer must be sure that any transient zero
would not occur: if any, the entire circuit will be reset.
VPin 4
2.0 VPin 6
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA1085CD | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:UNIVERSAL MOTOR SPEED CONTROLLER |
| TDA1085CG | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Universal Motor Speed 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 |
| TDA1085CG | 制造商:ON Semiconductor 功能描述:Power Supply IC |
| TDA10H0JB1 | 功能描述:DIP 開(kāi)關(guān)/ SIP 開(kāi)關(guān) SM HalfPitch DIP Swt SPST, 10 POS, JTerm RoHS:否 制造商:Omron Electronics 位置數(shù)量:10 開(kāi)關(guān)類型:DIP 執(zhí)行器:Rotary 端子節(jié)距:2.54 mm 觸點(diǎn)形式: 端接類型:Solder Pin 電流額定值:100 mA 電壓額定值 DC: 工作溫度范圍: 安裝:Through Hole |
| TDA10H0JB1R | 功能描述:DIP 開(kāi)關(guān)/ SIP 開(kāi)關(guān) SM HalfPitch DIP Swt SPST, 10 POS, JTerm RoHS:否 制造商:Omron Electronics 位置數(shù)量:10 開(kāi)關(guān)類型:DIP 執(zhí)行器:Rotary 端子節(jié)距:2.54 mm 觸點(diǎn)形式: 端接類型:Solder Pin 電流額定值:100 mA 電壓額定值 DC: 工作溫度范圍: 安裝:Through Hole |
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