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LM27952SD Datasheet(PDF) 2 Page - National Semiconductor (TI) |
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LM27952SD Datasheet(HTML) 2 Page - National Semiconductor (TI) |
2 / 8 page Connection Diagram LM27952 14-pin No-Pullback Leadless Leadframe Package (LLP-14) 4mm x 3mm x 0.8mm NS Package Number SDA14A 20148002 Pin Description Pin Name Description 1 C2+ Flying Capacitor C2 Connection 2V OUT Pre-Regulated Charge Pump Output 3 C1+ Flying Capacitor C1 Connection 4 D4 Regulated Current Sink Input. 5 D3 Regulated Current Sink Input. 6 D2 Regulated Current Sink Input. 7 D1 Regulated Current Sink Input. 8I SET Current Set Input. Placing a resistor (R SET) between this pin and GND sets the LED current for all the LEDs. LED Current = 200 x (1.25V ÷ R SET). 9 EN Enable Logic Input Pin. Logic Low = Shut Down, Logic High = Enabled. There is a 150k Ω (typ.) resistor connected internally between the EN pin and GND. 10 PWM Current Sink Modulation Logic Input Pin. Logic Low = Off, Logic High = On. Applying a Pulse Width Modulated (PWM) signal to this pin allows the regulated current sinks to be modulated without shutting down the internal Charge Pump and the V OUT node. 11 V IN Input Supply Range: 3.0V to 5.5V. 12 C2- Flying Capacitor C2 Connection. 13 GND Power Supply Ground Connection. 14 C1- Flying Capacitor C1 Connection. Ordering Information Order Number Package Description Package Marking Supplied as Tape and Reel (Units) LM27952SD No-Pullback LLP-14 XXXXX YYYYY = D005B 1000 LM27952SDX 4500 www.national.com 2 |
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