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ZXLD1362EV3 User Guide issue 1 1/7 11-01-2008

ZXLD1362EV3 USER GUIDE

DESCRIPTION

The ZXLD1362EV3, Figure 1, is a PCB constructed using an aluminium base for evaluating the ZXLD1362 LED

driver with internal switch [1]. The evaluation board can be used to drive an external choice of LEDs; the total forward

voltage across the LEDs depending on the number and type connected.

The operating voltage is nominally higher than 30V for the external LEDs, and can be raised to 60V maximum, which

will reduce the supply current. Please refer to the Zetex ZXLD1360 and ZXLD1350 products for applications requiring

input voltages lower than 30V.

The nominal current for the evaluation board is set at 700mA with a

0.15Ω sense resistor, R1.

The 68uH inductor used in the circuit is based on a 30V nominal supply, which should be connected across +VIN and

GND pins.

Note: The evaluation board does not have reverse polarity protection. It is fitted with a 2.1mm DC power plug with

positive to the centre pole.

Test point ADJ provides a connection point for DC or PWM dimming and shutdown.

Warning: with 700mA output, the connected LED will be hot and very bright

Figure 1: ZXLD1362EV3 evaluation board

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ZXLD1362EV3 User Guide issue 1 1/7 11-01-2008 ZXLD1362EV3 USER GUIDE DESCRIPTION The ZXLD1362EV3, Figure 1, is a PCB constructed using an alumini

ZXLD1362EV3 User Guide issue 1 2/7 11-01-2008 ZXLD1362 DEVICE DESCRIPTION The ZXLD1362 is a continuous mode inductive driver in a TSOT23-5 pack

ZXLD1362EV3 User Guide issue 1 3/7 11-01-2008 ZXLD1362EV3 EVALUATION BOARD REFERENCE DESIGN The ZXLD1362EV3 is configured to the reference design

ZXLD1362EV3 User Guide issue 1 4/7 11-01-2008 ZXLD1362 Operation In normal operation, when voltage is applied at +VIN, the ZXLD1362 internal NDM

ZXLD1362EV3 User Guide issue 1 5/7 11-01-2008 ZXLD1362EV3 Connection Point Definition Name Description +VIN Positive supply voltage. GND Supply

ZXLD1362EV3 User Guide issue 1 6/7 11-01-2008 PERFORMANCE The system efficiency depends on the sense resistor, supply voltage, switching inductor,

ZXLD1362EV3 User Guide issue 1 7/7 11-01-2008 Definitions Product change Zetex Semiconductors reserves the right to alter, without notice, specif

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Zetex-semiconductors-plc ZXLD1362EV3 Manuale Utente