Datasheet

UAA2016
http://onsemi.com
4
Figure 2. Comparison Between Proportional Control and ON/OFF Control
Overshoot
Time (minutes, Typ.)
Time (minutes, Typ.)Time (minutes, Typ.)
Heating
Power
P(W)
Room
Temperature
T (°C)
Time (minutes, Typ.)
Proportional Band
Proportional Temperature Control
DReduced Overshoot
DGood Stability
ON/OFF Temperature Control
DLarge Overshoot
DMarginal Stability
T
P
is centered on the zero−crossing.
AC Line
Waveform
I
Latch
T
P
I
Hold
Figure 3. Zero Voltage Technique
Gate Current
Pulse
f = AC Line Frequency (Hz)
Vrms = AC Line RMS Voltage (V)
R
sync
= Synchronization Resistor (W)
T
P
+
14xR
sync
 ) 7  10
5
Vrms  2
Ǹ
 xpf
(μs)