PMP2493.2, Buck Converter with Minimum Component Count to Drive LEDs (19V @ 280mA)
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Description
- PMP2493.2, Buck Converter with Minimum Component Count to Drive LEDs (19V @ 280mA). TPS40200 controller can be used as a low-cost LED driver. With an input voltage rating of 4.5 to 52 V, it can power LED strings with regulated current and up to a 45 V drop across the string. Current is sensed across a resistor between the cathode of the string and ground and is compared against a 696 mV reference to provide regulated current. Because the driver is a buck and not a boost or flyback, an open string will not produce voltages above the input voltage and over-voltage protection is not needed. The driver can operate in either the continuous or discontinuous mode. for output voltages above 35 V the discontinuous mode is needed due to duty cycle limitation above 35 V. The circuit shown has a Pulse Width Modulator (PWM) input for dimming purposes. Targeted current can be set with jumpers
Caractéristiques principales
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Conversion TypeDC to DC
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Input Voltage43 to 47 V
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Output Voltage19 V
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Output Current0.28 A
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Output Power5.32 W
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TopologyBuck- Non Sync
Pièces en vedette (6)
| Pièce numéro | Fabricant | Type | Description | |||
|---|---|---|---|---|---|---|
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TPS40200D | Texas Instruments | DC to DC Controllers | DC/DC Cntrlr Single-OUT Step Down 500kHz 8-Pin SOIC Tube | Ajouter au panier | |
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TPS40200DRBT | Texas Instruments | DC to DC Controllers | DC/DC Cntrlr Single-OUT Step Down 500kHz 8-Pin VSON EP T/R | Ajouter au panier | |
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TPS40200DR | Texas Instruments | DC to DC Controllers | DC/DC Cntrlr Single-OUT Step Down 500kHz 8-Pin SOIC T/R | Ajouter au panier | |
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TPS40200DG4 | Texas Instruments | DC to DC Controllers | DC/DC Cntrlr Single-OUT Step Down 500kHz 8-Pin SOIC Tube | Ajouter au panier | |
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TPS40200DRG4 | Texas Instruments | DC to DC Controllers | DC/DC Cntrlr Single-OUT Step Down 500kHz 8-Pin SOIC T/R | Ajouter au panier | |
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TPS40200DRBR | Texas Instruments | DC to DC Controllers | DC/DC Cntrlr Single-OUT Step Down 500kHz 8-Pin VSON EP T/R | Ajouter au panier | |