ZXLD1350EV2
ZXLD1350EV2 EVALUATION BOARD
k D1 
a
JP1 
LED k
JP2
J1
+VIN |
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| C2 |
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| L1 | R2 |
| C3 | U1 |
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GND |
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| SD1 |
| C1 |
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| R1 | RS |
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ADJ | JP3 |
| k |
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| D3 |
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Bare board: ZDB308R3 |
| a | |
Copyright Zetex Plc 2006 |
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k |
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D2 |
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a | 1 |
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In partnership with: | LED a |
| Figure 4: Top View | Figure 5: Bottom View | |
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ZXLD1350EV2 Connection Point Definition |
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Name |
| Description |
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+VIN |
| Positive supply voltage. Connect a +24V positive supply to this pin. | |
GND |
| Supply Ground (0V). Connect supply ground to this pin. | |
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ADJ |
| Internal voltage ref. pin (1.25). This pin can be used to achieve dimming and | |
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| and for switching the output current off. |
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| • Leave floating for normal operation. |
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| • See 'Other Features' section to achieve dimming, and | |
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| the output current off. |
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LED a |
| LED a connects to the ANODE of LED D3, and is the external LED anode connection | |
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| point. Disconnect the jumper JP2 when driving an external load. | |
LED k |
| LED k connects to the CATHODE of LED D1, and is the external LED cathode | |
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| connection point. Disconnect the jumper JP2 | when driving external LEDs. |
J1 |
| Pins 1 & 2: LED a, Pins 5 & 6: LED k |
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ZXDL1350EV2 OPERATION
ZXLD1350EV2 Power Up
1.Connect VIN to +24V of the power supply unit (PSU). Connect GND to the power supply ground (0V). Warning: The board does not feature reverse battery/supply protection.
2.Set the PSU to +24V. (+24V at VIN pin with ref. to the GND pin.)
3.Turn on the PSU.
Warning: Do not stare at the LEDs directly.
4.Ensure jumper J2 is fitted. With JP1 and JP3 disconnected (jumper off), all three LEDs should illuminate and will be regulated nominally at 300mA.
5.To change the number of LEDs connected in series, use jumper JP1 and JP3 to bypass LEDs D1 and D3 respectively.
Warning: The LEDs may be hot.
ZXLD1350EV2 User Guide Iss 5 |