MS1003SH MS1004SH Control IC for quasi-resonant power supply Application Note
■We have developed the MS1003SH and MS1004SH to meet the growing demand for power conservation. These ICs incorporate a super-standby mode to optimize power efficiency under micro loads.
■The MS1003SH and MS1004SH consume less power in standby mode than conventional ICs. The ICs incorporate various functions to make it more user-friendly and to make it easier to design a power supply with fewer external components.
●Characteristics
■Quasi-resonant design for high efficiency and low noise
■Four-step soft-start function
■Onboard startup circuit requires no startup resistor, dramatically reducing losses in the startup circuit.
■The automatic bottom-skip function controls increases in oscillation frequency and improves efficiency under light loads.
■Auto-burst mode improves efficiency under light loads with no additional components.
■Super-standby mode improves efficiency under micro loads.
■Soft drive circuit reduces noise.
■Thermal shutdown, overvoltage protection, and overload protection (Timer latch)
■Primary current limit circuit incorporates an input voltage dependence correction circuit to reduce the number of components required.
■Bias assist function for startup circuit
■Vcc-GND short circuit protection function
■SOP8/7J package employed for compact dimensions
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[ quasi-resonant power supply ][ Industrial equipment ][ video recorders ][ refrigerators ][ washing machines ][ air conditioners ] |
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Application note & Design Guide |
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Please see the document for details |
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SOP8;SOP7J |
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English Chinese Chinese and English Japanese |
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Sep. 10, 2019 |
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Ver.3.1 |
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3.3 MB |
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