LM3431-REF, CCFL to LED Conversion Power Supply
Referenzdesign unter Verwendung des Teils LM3431MH von Texas Instruments
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- LCD Backlighting
Beschreibung
- LM3431-REF, CCFL to LED Conversion Power Supply. Backlighting in portable device displays has historically utilized difficult-to-power cold cathode-fluorescent (CCFL) tubes. The tubes run on alternating current (AC) and need a large initial voltage of typically greater than 1 kV in order to fire them. Once they have fired, their operating voltage drops to under a kV. Because a notebook computer, for example, typically operates on low DC voltages (12V, 5V, 3.3V, etc.), a Royer oscillator must be used to transform this low voltage to the high-voltage AC required by the CCFL. The high voltages in the system are a potential safety hazard
Haupteigenschaften
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Input Voltage8 to 16 V
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Output Voltage20 V
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Output Current0.06 A
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Number of Derived Elements6
Empfohlene Bauteile (5)
| Teilenummer | Hersteller | Typ | Beschreibung | |||
|---|---|---|---|---|---|---|
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LMC6572AIM | Texas Instruments | Operational Amplifiers - Op Amps | Op Amp Dual Low Voltage Amplifier R-R O/P 11V 8-Pin SOIC Tube | In den Warenkorb | |
|
LM3431MH/NOPB | Texas Instruments | LED Drivers | LED Driver 20 Segment 28-Pin HTSSOP EP Tube | In den Warenkorb | |
|
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LM3431MHX/NOPB | Texas Instruments | LED Drivers | LED Driver 20 Segment 28-Pin HTSSOP EP T/R | In den Warenkorb | |
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LM3431MH/NOPB | Texas Instruments | LED Drivers | LED Driver 20 Segment 28-Pin HTSSOP EP Tube | In den Warenkorb | |
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LM3431MHX/NOPB | Texas Instruments | LED Drivers | LED Driver 20 Segment 28-Pin HTSSOP EP T/R | In den Warenkorb | |