JH5542B(L7/H) Non-isolated Buck APFC Offline LED Driver
◆Description
★The JH5542B(L7/H)is a high precision non-isolated buck driver with active PFC,specially designed for universal input offline constant current LED lighting. The driver with on-chip PFC circuit achieves high power factor and low THD.Operating in critical conduction mode,the power MOSFET switching loss is reduced and the inductor is fully utilized.
★The JH5542B(L7/H)integrates a 600V power MOSFET.With few external components,the LED output current can be precisely controlled.
★The JH5542B(L7/H)utilizes floating ground structure. The inductor current is sensed during the whole switching cycle.So it achieves high precision output current control,and excellent line regulation and load regulation.
★The JH5542B(L7/H)are built-in JFET start-up and IC power supply circuit,which enable the system to quickly start,and reduce the external power supply components,achieve smaller volume.
★The JH5542B(L7/H)offers rich protection functions to improve the system reliability,including LED open circuit protection,LED short circuit protection,VCC under voltage protection,CS resistor open circuit protection and cycle by cycle current limit.All the protection functions are auto-recovery.The system reliability is further improved by the thermal regulation function.The output current is reduced when the driver is over temperature.
★Available in SOP-7 /DIP-8 package.
◆Features
★Built-in JFET start-up and IC power supply circuit,The VCC power supply resistors and power feedback circuits from LED chips are not needed
★Ultra fast system start
★Ultra low operating current
★Active PFC for High Power Factor and Low THD
★Internal 600V Power MOSFET
★±3%LED Output Current Accuracy
★Excellent Line and Load Regulation
★Critical Conduction Mode Operation
★LED Short/Open Protection
★Current Sensing Resistor Open Protection
★Cycle by Cycle Current Limit
★VCC Under Voltage Protection
★Auto Fault Recovery
★Thermal Regulation Function
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JH5542B 、 JH5542BL7 、 JH5542BH 、 JH5542BH-H-BR 、 JH5542BL7-LP-AR 、 JH5542 |
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Non-isolated Buck APFC Offline LED Driver 、 high precision non-isolated buck driver |
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[ LED retrofit lamps ][ Bulb ][ Spot Light ][ PAR Lamp ][ LED String ][ LED tube ][ LED Light ] |
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Datasheet |
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Please see the document for details |
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SOP-7;DIP-8 |
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English Chinese Chinese and English Japanese |
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2018,06 |
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版本：201806D |
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851 KB |
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