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LM3551SD Datasheet(PDF) 2 Page - National Semiconductor (TI) |
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LM3551SD Datasheet(HTML) 2 Page - National Semiconductor (TI) |
2 / 15 page Connection Diagram 14 Pin Dual LLP Package 20151202 NS Package Number SDA14B Pin Descriptions Pin Name Function 9V IN Input Voltage. Input range: 2.7V to 5.5V. 13 T/F TORCH/FLASH Pin. Low = Torch Mode, High = Flash Mode 8 SW Switch Pin 10 OVP Over Voltage Protection Pin 3V C Compensation network connection. Connected to the output of the voltage error amplifier. 5 SD(LM3551) EN(LM3552) Shutdown pin logic input. High = Shutdown, Low = Enabled Enable pin logic input. High = Enabled, Low = Shutdown 12 FTO Flash Timeout. External capacitor determines max. duration allowed flash pulse 11 SS Soft Start Pin 4 FB Feedback Pin 14 FET-T Torch FET Drain 2 FET-F Flash FET Drain 1,7,DAP GND Ground 6 AGND Analog Ground. Connect the ground of the compensation components, C FTO and soft start cap to AGND. AGND must be connected to the GND pin through a low impedance connection. Ordering Information Order Number SD / EN Package Marking Supplied As LM3551SD SD L3551SD 250 units, Tape-and-Reel LM3551SDX SD L3551SD 3000 units, Tape-and-Reel LM3552SD EN L3552SD 250 units, Tape-and-Reel LM3552SDX EN L3552SD 3000 units, Tape-and-Reel www.national.com 2 |
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