LT1937 的典型應用是一款升壓 DC-DC
轉換器,專門設計用于以
恒定電流驅動白光 LED。該器件可以通過
鋰離子電池驅動兩個、三個或四個串聯的 LED。 LED 的串聯可提供相同的 LED
電流,從而實現均勻的亮度并無需鎮流電阻。 LT1937 的開關頻率為 1.2MHz,允許使用微型外部
元件
說明
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Typical Application for LT1937 is a step-up DC-DC converter specifically designed to drive white LEDs with a constant current. The device can drive two, three or four LEDs in series from a Li-Ion cell. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The LT1937 switches at 1.2MHz, allowing the use of tiny external components