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SC445

Semtech
Part Number SC445
Manufacturer Semtech
Description High Efficiency Integrated Driver
Published May 8, 2013
Detailed Description SC445 POWER MANAGEMENT Features                  High Efficiency Integrated Driver for 4-Strings of 15...
Datasheet PDF File SC445 PDF File

SC445
SC445


Overview
SC445 POWER MANAGEMENT Features                  High Efficiency Integrated Driver for 4-Strings of 150mA LEDs Description The SC445 is a high-efficiency multiple string WLED driver with an integrated boost converter.
It operates over a wide input range from 4.
5V to 27V and can sustain fast Vin transient up to 5V/µs.
It can drive up to forty WLEDs in 4 strings with current up to 150mA per string.
The stringto-string current matching is 2% typical, 3% maximum.
The overall efficiency is greater than 90% due to the low current sense voltage and a low-impedance internal power switch.
The wide PWM dimming range boasts a ratio of 500: 1.
The 700KHz switching frequency enables the...



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