CAT37 White LED driver circuit diagram

Published:2011/8/25 21:06:00 Author:Lucas | Keyword: White LED driver | From:SeekIC

CAT37 is the DC / DC step-up converter with adjustable output current. CAT32's main technical characteristics are as follow. ① Low Quiescent Current: 0.5mA. ② it uses low-resistance (0.5Ω)and high-voltage power switch, and the power efficiency is above 80%. ③ pin configuration is compatible with LT1937. ④ adjustable output current is up to 40mA, which can drive up to four series of white LEDs. ⑤ operating frequency is 1.2MHz, and it can use an external low inductor, capacitor. ⑥ When the input voltage is as low as 2.5V, it also can work. ⑦ Shutdown current is less than 1μA. ⑧it has open load protection.



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