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NCP1251BSN100T1G

Converter Offline Flyback Topology 100kHz 6-TSOP

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NCP1251BSN100T1G General Description

The NCP1251 is a highly integrated PWM controller capable of delivering a rugged and high performance offline power supply in a tiny TSOP-6 package. With a supply range up to 28 V, the controller hosts a jittered 65 kHz or 100 kHz switching circuitry operated in peak current mode control. When the power on the secondary side starts to decrease, the controller automatically folds back its switching frequency down to a minimum level of 26 kHz. As the power further goes down, the part enters skip cycle while limiting the peak current.
Over Power Protection (OPP) is a difficult exercise especially when no-load standby requirements drive the converter specifications. The ON proprietary integrated OPP lets you harness the maximum delivered power without affecting your standby performance simply via two external resistors. A latched Over Voltage Protection (OVP) is combined on the same pin. For ease of implementation, an auto-recovery OVP also monitors the Vcc line. These features offer an efficient protection in case of optocoupler failure or adverse open loop operation.
Finally, a timer-based short-circuit protection offers the best protection scheme, letting you precisely select the protection trip point irrespective of a loose coupling between the auxiliary and the power windings.

ON Semiconductor, LLC Inventory

Key Features

  • Non-dissipative internal and adjustable Over Power Protection (OPP)
  • Frequency Foldback down to 26 kHz and Skip-Cycle in light load conditions
  • Internal Ramp Compensation
  • Frequency jittering from full load to skip-cycle
  • Latch input for OVP and OTP implementations
  • Over Voltage Protection (OVP) monitoring on the Vcc pin
  • See NCP1250 for no Over Voltage Protection (OVP) on the Vcc pin
ON Semiconductor, LLC Original Stock

Application

  • Offline Adapters
  • AC-DC converters
  • 45W Adapter
ON Semiconductor, LLC Inventory

Specifications

Status Active Case Outline 318G-02
MSL Temp (°C) 260 Container Type REEL

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AVAQ determines and packages all devices based on electrostatic discharge (ESD) and moisture sensitivity level (MSL) protection requirements.

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Ratings and Reviews

More
M
M**n 02/09/2024

ths, will order again. all works!

16
N
N**s 06/17/2023

Perfect as you describe it

6
J
J**e 08/18/2021

Fast delivery, excellent !!!

12
M
M**l 06/03/2021

Very good with plastic protection not toThe damage is perfect for my projects

17

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NCP1251BSN100T1G Datasheet PDF

Preliminary Specification NCP1251BSN100T1G PDF Download

NCP1251BSN100T1G PDF Preview

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