MPS MP150 - Flow Chart

MP150 – OFFLINE PRIMARY-SIDE REGULATOR
MP150 Rev. 1.15 www.MonolithicPower.com 17
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FLOW CHART
Start
Vcc>5.6V
Internal High Voltage
Regulator ON
Y
N
Soft Start
Monitor V
FB
Monitor Vcc
OLP=Logic High
Y
OTP, SCP
and open loop
Monitor
Y
Vcc Decrease
to 2.4
Shut Down
Internal High Voltage
Regulator
N
Continuous
Fault Monitor
Vcc<5.3V
Y
N
OTP, SCP
or open loop
Logic High?
Y
N
UVLO, OTP, SCP, OLP and Open Loop
Protection are auto restar
Shut off the
Switching
Pulse
Y
N
Y
V
FB
<2.5V
V
FB
<1.7V
Turn ON the
MOSFET
Y
N
6144
switching
counter
finished?
Vcc<3.4V
Y
Y
N
Figure 12: Control Flow Chart