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Description
SWITCHING REGULATIR CONTROL
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DESCRIPTION
Mitsubishi IC type M51977P, FP are the off-line primary PWM controller which are especially designed for SMPS to get the regulated DC voltage from AC power supply.
As the totempole type high power-driver-circuit is integrated in these IC, these IC can drive the MOS-FET with fast rise and fast fall output pulse.
Type M51977P, FP have the functions of not only high frequency OSC and fast output drive but also current limit with fast response and high sensibility so the true"fast switching regurator " can be realized.
They have another big features of current protection to short and over current at secondary side, owing to the integrated timer type protection-circuit, if few parts are added to the primary circuit.
FEATURE
Type M51977P FP are the powerful and unique one so the SMPS with M51977P . FP will be able to realize such the features as
● 500 kHz operation of MOS-FET
— Output current of + 2A
— Fast rise time of 60ns and fast fall time of 40ns
— Small through current owing to " modified totempole driver circuit.”
● Compact and light-weight power supply
— Small start-up current................................................80μA typ.
— Big difference between " start-up voltage " and " stop voltage " makes the smoothing capacitor of the power input section small
Start-up threshold 16V , stop voltage 10V
— Packages with high power dissipation are used to withstand the heat generated by the gate-drive current of MOS FET
16-pin DIP, 20-pin SOP 1.5W (at 25℃)
● Simplified peripheral circuit with protection circuit and built-in Barge capacity totempole output
— High-speed current limiting circuit using pulse-by-pulse method (Two systems of CLM+pin, CLM-pin)
— Protection by intermittent operation of output over current....................................Timer protection circuit
— Over-voltage protection circuit (OVP)
— Protection circuit for output miss action at low supply voltage (UVLO)
● High-performance and highly functional power supply
— Triangular wave oscillator for easy dead time setting
APPLICATION
Feed forward regulator, Fly back regulator
RECOMMENDED OPERATING CONDITIONS
● Vcc of 12 to 30V
● Operating frequency of up to 500kHz
● T-ON terminal resistor of 10k to 75kΩ
● T-OFF terminal resistor of 2k to 30kΩ
Preview of the first 3 pages of the data sheet
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10000 buyer reviews from United States
Kimberly Williams
Length of registration:7 years
The testing result of the Intergrated Circuits M51977FP ordered from Utsource website was satisfactory. The device was tested for its electrical characteristics, such as current, voltage, power, and frequency. The results showed that the device was able to meet the specified requirements and was within the expected range. The device was also tested for its mechanical characteristics, such as size,
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03/17/2023
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M51977FP
M51977FP has several brands around the world that may have alternate names for M51977FP due to regional differences or acquisition. M51977FP may also be known as the following names:
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Stock Status: 10000
Minimum: 2
Total Price:
Unit Price:1.39300
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