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/Title (NCP1027 - High-Voltage Switcher for Medium Power Offline SMPS Featuring Low Standby Power)
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Acrobat Distiller 10.0.0 (Windows)
BroadVision, Inc.
2020-10-14T11:34:09+08:00
2015-01-05T12:13:36-07:00
2020-10-14T11:34:09+08:00
application/pdf
NCP1027 - High-Voltage Switcher for Medium Power Offline SMPS Featuring Low Standby Power
ON Semiconductor
The NCP1027 offers a new solution targeting output power levels
from a few watts up to 15 W in a universal mains flyback application.
Our proprietary high−voltage technology lets us include a power
MOSFET together with a startup current source, all directly
connected to the bulk capacitor. To prevent lethal runaway in low
input voltage conditions, an adjustable brown−out circuitry blocks
the activity until sufficient input level is reached.
Current−mode operation together with an adjustable ramp
compensation offers superior performance in universal mains
applications. Furthermore, an Over Power Protection pin brings the
ability to precisely compensate all internal delays in high input voltage
conditions and optimize the maximum output current capability.
Protection wise, a timer detects an overload or a short−circuit and
stops all operations, ensuring a safe auto−recovery, low duty cycle burst
operation. An integrated, auto−recovery, Overvoltage Protection
permanently monitors the VCC level and temporarily shuts down the
driving pulses in case of an unexpected feedback loop runaway.
Finally, a great RDS(on) figure makes the circuit an excellent choice
for standby/auxiliary offline power supplies or applications requiring
higher output power levels.
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