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ON Semiconductor
EVBUM2485DB - 65 W Notebook Off-line Adaptor with NCP12510 Evaluation Board User Manual
This evaluation board user manual describes the
NCP12510B65GEVB board and its main parameters, i.e.
efficiency, no−load input power consumption, EMI
signature, transient responses, etc.
The evolution board is a flyback topology converter
which provides output voltage 19 Vdc for output nominal
current up to 3.5 A, therefore, the nominal output power is
65 W. Input voltage range is recommended from 90 Vac up
to 265 Vac.
The switching of the converter is ensured by the
NCP12510 – fixed−frequency current−mode PWM
controller switching at 65 kHz. The frequency foldback
down to 26 kHz is implemented for achievement the high
efficiency during light load conditions. The skip cycle and
low supply current of the controller ensures the very low
no−load input power consumption (standby power) of the
converter, which is less than 40 mW without indication LED
on output.
The controller is also equipped with a lot of protections.
The standard protection is over−current protection which
disables the switching after fault timer is elapsed. This
protection is activated when over−current or short−circuit
conditions appear. In the case of damage of some component
important for regulation, the controller is equipped with fast
over−voltage protection on OPP pin (pin 3) and VCC pin
(pin 5). The controller protects the whole converter against
overheating by an NTC thermistor connected to the OPP pin
(pin 3). The protection against high power capability of
converter at high line is over−power protection. It is based
on reducing the internal peak current setpoint depending on
input voltage value.
2019-10-28T14:05:39+08:00
BroadVision, Inc.
2019-10-28T14:06:31+08:00
2019-10-28T14:06:31+08:00
Acrobat Distiller 19.0 (Windows)
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