データシートサーチシステム |
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TS1937 データシート(PDF) 1 Page - Taiwan Semiconductor Company, Ltd |
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TS1937 データシート(HTML) 1 Page - Taiwan Semiconductor Company, Ltd |
1 / 8 page TS1937 Boost (Step-up) WLED Driver 1/8 Version: C07 SOT-25 General Description The TS1937 is a step-up DC/DC converter specifically designed to drive white LEDs with a constant current. The device can drive 2 ~ 12 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 output capacitor can be as small as 0.22µF, saving space versus alternative solutions. A low 95mV feedback voltage minimizes power loss for better efficiency. Additional feature include over output voltage limiting when LEDs are disconnected. The TS1937 switches at a fixed frequency of 1.2MHz, allowing the use of tiny, low profile inductors and capacitors to minimize footprint and cost in space consideration applications for cellular phone backlighting or other hand held equipment. Application ● Cellular Phones ● Digital Still Cameras ● MP3 Players ● White LED Backlighting ● PDAs, Handheld computers Features ● Inherently Matched LED Current ● High Efficiency: 88% Typical ● Drives Up to 6 LEDs @ Vin 5V ● Drives Up to 12 LEDs @ Vin 12~15V ● 36V Rugged Bipolar Switch ● Fast 1.2MHz Switching Frequency ● Requires Only 0.22µF Output Capacitor ● PWM dimming control 1KHz to 10KHz ● Analog dimming control Ordering Information Part No. Package Packing TS1937CX5 RF SOT-25 3Kpcs / 7” Reel Typical Application Circuit Pin Definition: 1. SW 2. Ground 3. Feedback 4. CTRL 5. Input |
同様の部品番号 - TS1937 |
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同様の説明 - TS1937 |
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