Diodes ZETEX ZXLD1370EV2 User Manual

Zetex series buck/boost led driver

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ZXLD1370EV2 BUCK/BOOST LED DRIVER

USER GUIDE

BUCK/BOOST

0-1.5A DC

GND

DVM

8-48V 2A

1 - 15 LEDs

DC PSU

1.5A

4.5V

0 – 4.5V Status steps

Open Drain output

2.5V = 200%

125mV = 10%

-t°

Thermal connection

Fig.1 ZXLD1370EV2 Evaluation board connection diagram

Issue 2 – July 2010

www.diodes.com

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Page 1 1 - 15 LEDs DC PSU 1.5A 4.5V 0 – 4.5V Status steps Open Drain output 2.5V = 200% 125mV = 10% -t° Thermal connection Fig.1 ZXLD1370EV2 Evaluation board connection diagram Issue 2 – July 2010 www.diodes.com © Diodes Incorporated, 2010...
Page 3 Generic 0805 Generic 120K 1% 0805 Generic 36K 1% 0805 Generic R3 R5 R6 0805 Generic R8 R11 R12 R14 0805 Generic R13 R18 Not fitted R16 R17 0805 Generic Issue 2 – July 2010 www.diodes.com © Diodes Incorporated 2010...
Page 4 The ZXLD1370 works normally between 8-60V. For input voltages between 6-8V and high switch currents that require a fully enhanced MOSFET, it is recommended to use the bootstrap network D2- R13 and remove R11. Issue 2 – July 2010 www.diodes.com © Diodes Incorporated 2010...
Page 5 ZXLD1370EV2 Fig. 3 Waveforms for Boost and Buck-boost modes Issue 2 – July 2010 www.diodes.com © Diodes Incorporated 2010...
Page 6 ~ 90ºC. Thermal control by LED current reduction Fig. 4 Thermal control The Thermal Control feature can be disabled by connecting TADJ to REF through the jumper resistor R8. Issue 2 – July 2010 www.diodes.com © Diodes Incorporated 2010...
Page 8 Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer...