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LM3501TL-16 Datasheet(PDF) 2 Page - National Semiconductor (TI) |
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LM3501TL-16 Datasheet(HTML) 2 Page - National Semiconductor (TI) |
2 / 18 page Connection Diagram Top View 20065302 8-bump micro SMD Ordering Information Order Number Package Type NSC Package Drawing Top Mark Supplied As LM3501TL-16 micro SMD TL08SSA 19 250 Units, Tape and Reel LM3501TLX-16 micro SMD TL08SSA 19 3000 Units, Tape and Reel LM3501TL-21 micro SMD TL08SSA 30 250 Units, Tape and Reel LM3501TLX-21 micro SMD TL08SSA 30 3000 Units, Tape and Reel Pin Description/Functions Pin Name Function A1 AGND Analog ground. B1 V IN Analog and Power supply input. C1 V OUT PMOS source connection for synchronous rectification. C2 V SW Switch pin. Drain connections of both NMOS and PMOS power devices. C3 GND Power Ground. B3 FB Output voltage feedback connection. A3 CNTRL Analog LED current control. A2 SHDN Shutdown control pin. AGND (pin A1): Analog ground pin. The analog ground pin should tie directly to the GND pin. V IN (pin B1):Analog and Power supply pin. Bypass this pin with a capacitor, as close to the device as possible, con- nected between the V IN and GND pins. V OUT (pin C1):Source connection of internal PMOS power device. Connect the output capacitor between the V OUT and GND pins as close as possible to the device. V SW (pin C2):Drain connection of internal NMOS and PMOS switch devices. Keep the inductor connection close to this pin to minimize EMI radiation. GND (pin C3):Power ground pin. Tie directly to ground plane. FB (pin B3):Output voltage feedback connection. Set the primary White LED network current with a resistor from the FB pin to GND. Keep the current setting resistor close to the device and connected between the FB and GND pins. CNTRL (pin A3): Analog control of LED current. A voltage above 125 mV will begin to regulate the LED current. De- creasing the voltage below 75 mV will turn off the LEDs. SHDN (pin A2):Shutdown control pin. Disable the device with a voltage less than 0.3V and enable the device with a voltage greater than 1.1V. The white LED current can be controlled using a PWM signal at this pin. There is an internal pull down on the SHDN pin, the device is in a normally off state. www.national.com 2 |
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