NCP5425DBR2

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Output Type:	Transistor Driver
Function:	Step-Down
Output Configuration:	Positive
Topology:	Buck
Number of Outputs:	2
Output Phases:	2
Voltage - Supply (Vcc/Vdd):	4 V ~ 16 V
Frequency - Switching:	150kHz ~ 750kHz
Duty Cycle (Max):	100%
Synchronous Rectifier:	Yes
Clock Sync:	No
Serial Interfaces:	--
Control Features:	Frequency Control
Operating Temperature:	0°C ~ 125°C (TJ)
Package / Case:	20-TSSOP (0.173", 4.40mm Width)
Supplier Device Package:	20-TSSOP
Base Part Number:	NCP5425

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NCP5425DBR2 Application Field and Working PrincipleNCP5425DBR2 is a DC-DC switching controller designed and manufactured by ON Semiconductor. It was specifically designed for use in high power factor (40% efficiency or greater) isolated flyback converters and isolated buck-boost converters. It has an operating voltage range of 6V to 200V and a temperature range of -55℃ to +150℃. It can be quickly and easily configured to provide optimal control over a wide input voltage range.This DC-DC switching controller is a highly integrated, low-cost power control solution for powering a variety of digital systems and providing optimal system-level efficiency. It has a low operating current of less than 10mA and a low quiescent power of less than 200mW, making it ideal for operations in low-power, high-efficiency and high-power applications. It also features a wide range of features and is fully compatible with both synchronous and linear operation styles. The NCP5425DBR2 features two independent power MOSFETs that can be configured to operate in either buck, boost, buck-boost, flyback or Totem-Pole converter topologies. The controller also features a four-pin, 1.2A-capable switch and two sense inputs, allowing for optimized system control over wide input and output voltage ranges. The wide voltage range of the switching controller enables the use of either non-isolated or isolated isolated flyback and isolated buck-boost topologies. In addition, the controller provides both over-voltage protection (OVP) and under-voltage protection (UVP) functions. The overvoltage protection can be set to start at any level between 5V and 400V, and the under-voltage protection can be set to start at any level between 0.5V and 250V. Both functions are programmable through the control interface pins or through the reset switch.The NCP5425DBR2 also features key integrated elements such as an adjustable soft-start circuitry, an adjustable minimum PWM frequency, a current limit circuitry and an adjustable frequency synchronization method. All of these features can be programmed through a dedicated serial port or through the control interface pins. The device also features complete fault protection and a programmable high-side current sense amplifier.Overall, the NCP5425DBR2 DC-DC switching controller is a powerful and versatile solution for powering a variety of digital applications. It features a comprehensive range of features, enabling the use of wide input and output voltage ranges and enabling easy tuning of power conversion profiles. Its advanced protection features and programmable elements make it ideal for optimal performance in low-power, high-efficiency and high-power applications.

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