LED drive system for controlling an off-chip power supply

摘要: A LED drive system for controlling an off-chip power supply enables the function to be located ‘off-chip’—i.e., on IC which is separate from containing other components. The provides a common line voltage strings connected in series with respective current sink circuits at junctions, response signal applied control input. includes ‘minimum’ circuit outputs least of voltages and I/O pin receives that varies output minimum circuit. When external supply's input coupled system's pin, present controls as needed provide desired voltage.