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LM27951 数据表(PDF) 3 Page - Texas Instruments |
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LM27951 数据表(HTML) 3 Page - Texas Instruments |
3 / 20 page 1 3 4 5 6 14 12 11 10 9 Die-Attach Pad: GND VOUT C1+ VIN D3 D2 C2+ C1- GND C2- EN 7 D1 8 ISET 2 D4 13 PWM 1 2 3 4 5 14 12 11 10 9 Die-Attach Pad: GND VOUT C2+ C1+ D4 D3 C1- C2- VIN PWM EN 8 ISET 13 GND 6 7 D2 D1 3 LM27951 www.ti.com SNVS416C – NOVEMBER 2005 – REVISED FEBRUARY 2016 Product Folder Links: LM27951 Submit Documentation Feedback Copyright © 2005–2016, Texas Instruments Incorporated 5 Pin Configuration and Functions NHK Package 14-Pin WSON Top View NHK Package 14-Pin WSON Bottom View Pin Functions PIN TYPE DESCRIPTION NUMBER NAME 1 C2+ Power Flying capacitor C2 connection 2 VOUT Power Pre-regulated charge-pump output 3 C1+ Power Flying capacitor C1 connection 4 D4 Output Regulated current source output 5 D3 Output Regulated current source output 6 D2 Output Regulated current source output 7 D1 Output Regulated current source output 8 ISET Input Current set input. Placing a resistor (RSET) between this pin and GND sets the LED current for all the LEDs. LED current = 200 × (1.25 V / RSET). 9 EN Input Enable logic input pin. Logic low = shutdown; Logic high = enabled. There is a 150-k Ω (typical) resistor connected internally between the EN pin and GND. 10 PWM Input Current source modulation logic input pin. Logic low = Off; Logic high = On. Applying a pulse width modulated (PWM) signal to this pin allows the regulated current sources to be modulated without shutting down the internal charge pump and the VOUT node. 11 VIN Input Input supply: 2.8 V to 5.5 V 12 C2- Power Flying capacitor C2 connection 13 GND Ground Power supply ground connection 14 C1- Power Flying capacitor C1 connection |
类似零件编号 - LM27951 |
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类似说明 - LM27951 |
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