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參數(shù)資料
| 型號： | ST52T301P |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 8-Bit OTP/EPROM DuaLogic] MCUs WITH ADC, UART, TIMER, TRIAC & PWM DRIVER |
| 中文描述： | 8位檢察官辦公室/存儲器DuaLogic]與藝術(shù)發(fā)展局和UART，定時(shí)器，可控硅控制器 |
| 文件頁數(shù)： | 46/100頁 |
| 文件大?。?/td> | 497K |
| 代理商： | ST52T301P |
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D7 D6 D5 D4 D3 D2 D1 D0
REG_CONF8
TRIAC / PWM
TCLSB - Prescaler init value
Least Significative Bits
D7 D6 D5 D4 D3 D2 D1 D0
REG_CONF9
TRIAC / PWM
TCMSB - Prescaler init value
Most Significative Bits
Figure10.2.TRIAC/PWMConfigurationRegister 8 and 9
The PWM period can be generated, internally, by
dividingthe masterclockor,externally,byusingan
externalclock signal.
Inbothcases,theclocksignalis dividedbya 16-bit
Prescaler, managed by REG_CONF8 and
REG_CONF9(see Figure 10.2).
Thedutycycleis fixedbya value,thatcanbe either
the output of a fuzzyinference or the result of an
arithmetic calculus. In the first case, it can be
loaded directly in the register of the peripheral,
otherwise it can be stored in one location of the
Register File for further manipulations and then
used forthe controlof the PWM.
Burst Mode
It is based on turning on and off the TRIAC, for a
fixed integer number of main voltage periods, in
order to controlthe power transferredto the load.
For this reason a Burst Mode TRIAC control
consistsof a signal,with a period,T,containingan
integernumberof themainvoltageperiods,whose
duty cycle is proportional to the numberof periods
inwhichthe TRIACis ON(Duty Cycle).Thiskindof
Triac control is mainly used for thermal regulation.
Thedutycycleisfixedbyavaluethatcanbedirectly
the output of a fuzzyinference or the result of an
arithmeticcalculus.
In order to work in Burstmode, it is necessary to
detect the pre-post zero-crossingof main voltage,
by using an externalinsertingcircuitry.
The user can define the period T, by means of the
internal 16-bit prescaler, setting REG_CONF8 and
REG_CONF9(see Figure10.2).T isproportionalto
the main voltage period, it is in the range 0 to 21.8
sec(if themain frequencyis 50Hz).
The width and the polarity of the pulses can be
programmed according to the Triac and the circuit
characteristics.
Phase Angle PartializationMode
Thismethodis basedon turningon theTRIAConly
for a part (phase angle) of each main voltage
period.When the phase angle is large the energy
(power)suppliedto theloadis low,viceversa,when
thephaseangleis smallthe energysuppliedto the
load is high.
The phaseangle can be fixed bya fuzzyalgorithm
or by a value stored in the Register File.
The phase angle is an 8-bit value.
The peripheral is programmable in order to work
witha main voltagefrequencyof 50 or 60 Hz.
46/99
ST52T301/E301
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