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LM27964SQ-I Datasheet(PDF) 2 Page - National Semiconductor (TI) |
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LM27964SQ-I Datasheet(HTML) 2 Page - National Semiconductor (TI) |
2 / 13 page Connection Diagram 24 Pin Quad LLP Package NS Package Number SQA24A 20138102 Pin Descriptions Pin #s Pin Names Pin Descriptions 24 V IN Input voltage. Input range: 2.7V to 5.5V. 23 P OUT Charge Pump Output Voltage 19, 22 (C1) 20, 21 (C2) C1, C2 Flying Capacitor Connections 13, 14, 15, 16 D4A, D3A, D2A, D1A LED Drivers - GroupA 4, 5 D1B, D2B LED Drivers - GroupB 6 DKEY LED Driver - KEYPAD 17 I SETA Placing a resistor (R SETA) between this pin and GND sets the full-scale LED current for Group A LEDs. LED Current = 200 x (1.25V ÷ R SETA) 3I SETB Placing a resistor (R SETB) between this pin and GND sets the full-scale LED current for Group B LEDs. LED Current = 200 x (1.25V ÷ R SETB) 12 I SETK Placing a resistor (R SETK) between this pin and GND sets the total LED current for the KEYPAD LEDs. Keypad LED Current = 800 x (1.25V ÷ R SETK) 1 SCL Serial Clock Pin 2 SDIO Serial Data Input/Output Pin 7 VIO Serial Bus Voltage Level Pin 9, 10, 18, DAP GND Ground 8, 11 NC No Connect Ordering Information Order Information Current Source PWM Frequency Package Supplied As LM27964SQ-I 10kHz. SQA24 LLP 1000 Units, Tape & Reel LM27964SQX-I 4500 Units, Tape & Reel LM27964SQ-A 23kHz. SQA24 LLP 1000 Units, Tape & Reel LM27964SQX-A 4500 Units, Tape & Reel www.national.com 2 |
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