zxld1320 Zetex Semiconductors plc., zxld1320 Datasheet
zxld1320
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zxld1320 Summary of contents
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... Issue 1 - January 2008 © Zetex Semiconductors plc 2008 DC-DC The feedback control circuitry inside the ZXLD1320 provides excellent load and current regulation, resulting in very stable LED current over the full operating voltage and temperature range. The LED current can be adjusted from 100% ...
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... Pin connections (top-view) Package 14-Pin DFN with exposed pad 4mm x 3mm 0.50mm pitch 1.5W @T =70°C A Block diagram Issue 1 - January 2008 © Zetex Semiconductors plc 2008 Package view DFN14 Package (bottom view). 45° chamfer denotes Pin 1 2 ZXLD1320 www.zetex.com ...
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... The lower of (+5.0V) or (VIN + 0.3V) -0.3V to The lower of (+5.0V) or (VIN + 0.3V) -0.3V to The lower of (+5.0V) or (VIN + 0.3V) -0.3V to The lower of (+5.0V) or (VIN + 0.3V) -0.3V to +5V ) 20V ) 20V CEO 3A (Pulse Width = 300µs. Duty Cycle<=2%) ) 1.5A C Nominal value 53°C/W 3 ZXLD1320 -40 to 125°C -55 to 150°C -40 to 150°C 1.5W at Tamb = 70°C www.zetex.com ...
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... BIAS drive current (Reduced output current condition) compensation switch current (I )=0.05/R SWPEAK current above a preset temperature threshold. (see section on temperature control for details) 4 ZXLD1320 <28mV) to turn off device ADJ S to sense emitter current) SENSE M M www.zetex.com ...
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... Conditions Measured on I pin CFB pin at 0V Measured into ISENSE with pin at 0V. CFB pin brightness control mode normal operation VADJ<500mV 100µA injected into ADJ pin 5 ZXLD1320 = 25°C unless otherwise stated Min Typ Max 4 480 500 520 50 ...
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... I =2A, I =50mA =200mA =2A =10V,f=1MHz =10V IN I =2A to Ic<100µ ZXLD1320 Typ Max Units 1.2 1.7 µ µs 600 KHz VIN V 0.4 V 500 700 µs Typ Max Units 1 ...
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... ADJ V =500mV ADJ V =50mV ADJ V =500mV ADJ V =500mV ADJ Conditions Onset of output current reduction (V falling) TADJ Output current reduced to <10% of set value (V falling) TADJ 7 ZXLD1320 Min Typ Max Units 100 200 mV 0.08 1 µA 370 ppm/ 150 K 350 KHz 2.5 MHz 1 ...
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... Zetex Semiconductors plc 2008 Conditions V >4V IN 4V<VIN<18V, Iout=1A, V =100mV, ADJ 4V<VIN<18V, Iout=1A, V =100mV ADJ 350mA<I <1.5A (LED) 350mA<I <1.5A (LED) Reel width Quantity (mm) per reel 12 3,000 8 ZXLD1320 Min Typ Max Units 1 100 200 ppm %/A 0.5 %/ Device mark 1320 www.zetex.com ...
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... Device description The ZXLD1320 is a buck mode inductive DC-DC converter, with an internal switch, designed for driving single or multiple LEDs in series total of 1.5A output current. Depending upon supply voltage (VIN), LED forward voltage drop ( 24W of output power. Applications cover both commercial and automotive environments with VIN ranging from 4 to 18V. ...
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... The Thermal Control feature can be disabled by leaving the TADJ pin floating connecting it to VREF. Over-temperature shutdown The ZXLD1320 incorporates an over-temperature shutdown circuit to protect the device against damage caused by excess die temperature, resulting from excessive power dissipation in the switch. The output of the 'Over-temp Shutdown' circuit will go high when the die temperature exceeds 150° ...
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... Issue 1 - January 2008 © Zetex Semiconductors plc 2008 will therefore give a maximum current of 91 will give an approximately linear variation of output ADJ ). The tolerance of the internal 100k resistor and RADJ should ZXLD1320 ADJ (nom) and the LED can be used ADJ www.zetex.com ...
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... LED LED Where duty cycle PWM frequency of 200Hz, or lower is recommended, to minimize errors due to the rise and fall times of the converter output. Issue 1 - January 2008 © Zetex Semiconductors plc 2008 Fig 1 ZXTN25015DFL Fig ZXLD1320 ADJ ZXLD1320 www.zetex.com ...
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... LED current proportionally from its nominal set value when the LED temperature rises above a predefined threshold. (Fig.3) The 'Thermal compensation current' generator inside the ZXLD1320 provides the necessary thermal compensation current to meet this requirement, using an NTC thermistor and resistor. (Fig 4) The TADJ pin of the device has a voltage threshold of 75mV nominal, which is derived from the reference voltage VREF ...
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... The reduced base current will lower supply current and hence improve efficiency in lower power applications. Making R1 = 33mΩ gives a peak coil current of 1.5 Amps. The internal power transistor turns on until the coil current builds up to the peak value, this Issue 1 - January 2008 © Zetex Semiconductors plc 2008 14 ZXLD1320 www.zetex.com ...
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... TADJ Value LED Driver Schottky diode 10µH 2A 10µH 2A 10µH 2A 10nF 10V 4.7µF 50V 2.2µF 25V 33mΩ 1.5κΩ 100mΩ 5.1kΩ 15 ZXLD1320 = 10mV gives a LED ADJ Manufacturer Contact Details Zetex www.zetex.com Zetex Coilcraft www.coilcraft.co m NIC www.niccomp Wurth www.wurth.co.uk ...
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... Thermal Protection circuit. Issue 1 - January 2008 © Zetex Semiconductors plc 2008 = 50mV). The longer OFF time and variable peak current ADJ SENSE 16 ZXLD1320 = 500mV), increasing to ADJ resistor R1 will still give an accurate , which could perhaps SAT www.zetex.com ...
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... Issue 1 - January 2008 © Zetex Semiconductors plc 2008 Millimeters DIM Min Max 0.70 0.80 D2 0.1240 0.00 0.05 e 0.203 REF. E 0.1161 0.20 0.30 E2 0.0650 3.95 4.05 L 0.0138 17 ZXLD1320 PIN #1 IDENTIFICATION CHAMFER 0.300 X 45° Inches Millimeters Min Max Min 0.1279 3.15 0.0197 BSC 0.50 BSC 0.1201 2.95 0.0689 1.65 0.0177 0.35 www.zetex.com Max 3.25 3.05 1.75 0.45 ...
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... Zetex Semiconductors plc 3701-04 Metroplaza Tower 1 Zetex Technology Park, Chadderton Hing Fong Road, Kwai Fong Oldham, OL9 9LL Hong Kong United Kingdom Telephone: (852) 26100 611 Telephone: (44) 161 622 4444 Fax: (852) 24250 494 Fax: (44) 161 622 4446 asia.sales@zetex.com hq@zetex.com 18 ZXLD1320 www.zetex.com ...