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Diodes ZXLD1374QEV1, User Manual

The Diodes ZXLD1374QEV1 User Manual is available for free download on our website. This comprehensive manual provides step-by-step instructions and essential information on operating and optimizing the ZXLD1374QEV1. Get the most out of your product by downloading the manual now, only at manualshive.com.

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September 2018

www.diodes.com

© Diodes Incorporated, 2018

ZXLD1374QEV1 BUCK LED DRIVER

USER GUIDE

Fig. 1 ZXLD1374QEV1 Evaluation board connection diagram

8-48V 2A

DC PSU

0-1.5A DC

DVM

1 - 15 LEDs

1.5A

0V

4.5V

Open Drain output

125mV = 10%

2.5V = 200%

-t°

GND

0

– 4.5V Status steps

Thermal connection

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Summary of Contents for ZXLD1374QEV1

Page 1: ...rporated 2018 ZXLD1374QEV1 BUCK LED DRIVER USER GUIDE Fig 1 ZXLD1374QEV1 Evaluation board connection diagram 8 48V 2A DC PSU 0 1 5A DC DVM 1 15 LEDs 1 5A 0V 4 5V Open Drain output 125mV 10 2 5V 200 t GND 0 4 5V Status steps Thermal connection ...

Page 2: ...ZXLD1374QEV1 September 2018 www diodes com Diodes Incorporated 2018 2 Fig 2 ZXLD1374QEV1 Schematic Diagram ...

Page 3: ...n from a separate supply instead of the VIN voltage To do this remove R14 fit R11 10k0 fit R13 10k0 Use Zener diode D2 to keep VAUX pin 15V For other reference designs or more applications information please see the ZXLD1374Q datasheet OPERATION In Buck mode the LED current is sensed by the series resistor R1 R2 An output from the control loop responsible for sensing this current drives the input ...

Page 4: ...ZXLD1374QEV1 September 2018 www diodes com Diodes Incorporated 2018 4 Fig 3 Waveforms ...

Page 5: ...d only the output is switched by the control signal The device can be shut down by taking the PWM pin to 0 4V for 15ms with a short to 0V or suitable open collector NPN or open drain NMOS transistor In shutdown most of the circuitry inside the device is turned off and the quiescent current will be typically 90µA TADJ Terminal Thermal control of LED current The Thermal control circuit monitors the ...

Page 6: ...ZXLD1374QEV1 September 2018 www diodes com Diodes Incorporated 2018 6 BOARD LAYOUT ...

Page 7: ...uthorized application Products described herein may be covered by one or more United States international or foreign patents pending Product names and markings noted herein may also be covered by one or more United States international or foreign trademarks LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems wi...

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