Smd803 operates in constant frequency mode or constant cut-off time frequency mode with external resistance connection.
Smd804 PWM circuit and internal MOSFET switch level isolation technology reduce thermal interference and make over temperature protection action accurate.
The smd803 also supports PWM dimming with a duty cycle from 0% to 100%. Multichip
The design of smd803 can be programmed by single chip microcomputer to realize the application of RGBW color and harmonious lighting.
Smd803 is a PWM controller for peak current controlled buck converter.
The buck circuit is easy to design because there is no need for feedback compensation, so only a few components are required.
The smd803 can be set to operate in a constant cut-off time frequency mode, and the input voltage is less than twice the output voltage, which is also a duty cycle greater than 50%.
It operates at DC voltage of 9V 60V.
Support drive current to 2A
The external resistor operates at 25kHz 300kHz
Support fixed frequency mode and constant off time frequency mode
The built-in current limiting circuit is set by external resistance (current setting resistance)
CS pin voltage tolerance is less than 4%
Over temperature protection
Application scope:
General LED lighting
stage lighting
DC LED lighting
Mode: smd803 is a PWM controller for peak current controlled buck converter. The buck circuit is easy to design because there is no need for feedback compensation, so only a few components are required.
Timing frequency mode: smd803 can be set to constant off time-frequency mode, and the input voltage is less than twice the output voltage, which is also applicable to the working cycle with duty cycle greater than 50%
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