NCP1011ST100T3G

Frequency - Switching:	100kHz
Base Part Number:	NCP1011
Mounting Type:	Surface Mount
Supplier Device Package:	SOT-223
Package / Case:	TO-261-4, TO-261AA
Operating Temperature:	-40°C ~ 150°C (TJ)
Control Features:	--
Fault Protection:	Over Load, Over Temperature, Over Voltage
Power (Watts):	19W
Series:	--
Duty Cycle:	67%
Voltage - Supply (Vcc/Vdd):	8.5 V ~ 10 V
Topology:	Flyback
Voltage - Breakdown:	700V
Internal Switch(s):	Yes
Output Isolation:	Isolated
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction to NCP1011ST100T3G Application Field and Working Principle

The NCP1011ST100T3G is a highly versatile and efficient offline switcher featuring an integrated high voltage PWM controller with a power delivered that reaches up to 100W. This device is suitable for a wide range of offline AC-DC converter applications such as non isolated DC-DC converters, POL converters and non isolated Flyback converters. The device also offers excellent energy efficiency, low input/output distortion and smooth transition during mode transitions.

Features of NCP1011ST100T3G

The NCP1011ST100T3G features an integrated power MOSFETs and control circuitry allowing for in circuit control and high switching performance. In addition, the device features a wide operating voltage range of 8–36 VDC, high frequency up to 1MHz, high surge current capability up to 4A and a low external component count. It also features an inbuilt synchronous rectification block for high efficiency, automatic primary side switching mode detection and synchronous rectification mode.

Working Principle of NCP1011ST100T3G

The NCP1011ST100T3G employs a pulse-width modulation (PWM) control strategy to regulate the output voltage. This allows the duty cycle to be modified based on the output power demand. During normal operation, the controller utilizes proprietary signal path to detect the voltage amplitude and voltage ripple of the output signal. Based on the feedback signal, the internal circuit adjusts the duty cycle of the switching signal to maintain the output voltage within a predetermined window.When the demand changes, the NCP1011ST100T3G will transition between the various switching modes in order to maintain the desired output voltage. The device can switch between Continuous Conduction Mode (CCM), Discontinuous Conduction Mode (DCM), Lower Operating Point Mode (LOP), and Diode Emulation Mode (DEM) which ensures smooth operation and high efficiency for a wide range of loads.

Advantages of NCP1011ST100T3G

The NCP1011ST100T3G offers several key advantages such as high efficiency, low electromagnetic interference (EMI), and high power density. The device also features integrated output overvoltage, overcurrent, open loop, and short loop protection which provide greater reliability and safe operation.Furthermore, the NCP1011ST100T3G eliminates the need for a dedicated control loop that is normally required for traditional offline switchers. As a result, the system cost, design effort, foot print, and complexity are reduced. This in turn allows manufacturers to use the NCP1011ST100T3G in various applications without having to incur additional costs and design time. The NCP1011ST100T3G is ideal as an offline switcher for low-power applications such as industrial controls, energy-saving lighting, and solar inverters.

Conclusion

The NCP1011ST100T3G is a highly versatile and efficient offline switcher featuring an integrated high voltage PWM controller with a power delivered that reaches up to 100W. The device is suitable for a wide range of offline AC-DC converter applications such as non isolated DC-DC converters, POL converters, and non isolated Flyback converters. It also offers excellent energy efficiency, low input/output distortion and smooth transition during mode transitions. The device offers several key advantages such as high efficiency, low EMI, and high power density. This makes it an ideal choice for applications such as industrial controls, energy-saving lighting, and solar inverters.

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