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Pin
Symbol
No.
1
Z/C
Trigger input terminal.
Zero detection voltage: 0.25V
It becomes less than 3V, the mode
turns to standby.
2
F/B
Bias current feedback input terminal.
Switching ON time (min.) ~ (max.)
1.5V ~ 4.5V / 0
In standby mode
Oscillation stops:less than 0.8V
Oscillation starts: over 1.8V
3
GND
GND terminal
4
Vcc
Power terminal of IC.
Oscillation starting voltage: Vcc =
and over 14.5V
Oscillation stop voltage: Vcc = and
less than 9.6V
Over voltage latching voltage: Vcc =
20V
5
Drain Drain terminal for Main switching
material.
3. Startup Circuit
When power is turned on, input voltage of the Switching Transformer is supplied to IC1150 as the
startup power.
Description
sec. ~ 25
sec.
8
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