zxld1322 Zetex Semiconductors plc., zxld1322 Datasheet
zxld1322
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zxld1322 Summary of contents
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... Issue 1 - January 2008 © Zetex Semiconductors plc 2008 DC-DC The feedback control circuitry inside the ZXLD1322 provides excellent load and current regulation, resulting in very stable LED current over the useful life of the battery and over the full operating 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 ZXLD1322 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 +15V -0.3V to +5V ) 18V ) 18V CEO 3A (Pulse width = 300µs. Duty cycle<=2 Nominal value 26.3°C/W 3 ZXLD1322 -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/RS SWPEAK ) from this pin to to VIN to define nominal M average output (LED) current of 0.1/R current above a preset temperature threshold. (see section on temperature control for details) 4 ZXLD1322 to sense emitter current) SENSE M www.zetex.com ...
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... Conditions Measured on ISENSE pin CFB pin at 0V Measured on ISENSE pin. Start-up mode VIN=1.2V Measured into ISENSE with pin at 0V.CFB pin brightness control mode Normal operation VADJ<500mV 100µA injected into ADJ pin 5 ZXLD1322 (a) ) Min Typ Max Units 2 1.2 2.4 V 1 ...
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... I =2A, I =50mA =200mA =2A =10V,f=1MHz =10V IN I =2A to Ic<100µ ZXLD1322 Typ Max Units 1.2 1.7 µ µs 600 KHz 50 KHz Typ Max Units 120 mV 209 ...
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... VMON=10mV VMON=100mV VMON=10mV VMON=100mV RM = 0.1Ω VMON = 100mV Conditions VADJ=50mV VADJ=500mV VADJ=50mV VADJ=500mV VADJ=500mV Conditions Onset of output current reduction (VTADJ falling) Output current reduced to <10% of set value (VTADJ falling) 7 ZXLD1322 Min Typ Max Units 2 100 200 mV 0.08 1 µA 370 ppm/ 150 K ...
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... Issue 1 - January 2008 © Zetex Semiconductors plc 2008 Conditions VIN>3V 3.0V<VIN<15V, (g) Iout=700mA, VADJ=100mV 3.0V<VIN<15V, Iout=700mA, VADJ=100mV 350mA<I(LED)<700mA 350mA<I(LED)<700mA Reel width Quantity (mm) per reel 12 8 ZXLD1322 Min Typ Max Units 0. 100 200 ppm %/A 0.5 %/V 85 ...
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... Device description The ZXLD1322 is a buck/boost mode inductive DC-DC converter, with an internal switch, designed for driving single or multiple LEDs in series total of 700mA output current. Depending upon supply voltage (V ), LED forward voltage drop (V IN provide up to 12W of output power. Applications cover V ranging from 2.5V to 15V. ...
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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 ZXLD1322 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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... SENSE 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 ZXLD1322 ADJ forms the lower part of a ADJ (nom) and the LED can be used ADJ ...
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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 ADJ ZXTN25015DFL Fig ZXLD1322 ZXLD1322 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 ZXLD1322 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 = 25mΩ gives a peak coil current of 2 Amps. The internal power transistor turns on until the coil current builds up to the peak value. At this Issue 1 - January 2008 © Zetex Semiconductors plc 2008 14 ZXLD1322 www.zetex.com ...
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... Value LED Driver Schottky diode 10µH 2A 10µH 2A 10µH 2A 10nF 10V 4.7µF 50V 2.2µF 25V 25mΩ 1.5kΩ 100mΩ 5.1kΩ 10k 15 ZXLD1322 Manufacturer Contact Details Zetex www.zetex.com Zetex Coilcraft www.coilcraft.com NIC www.niccomp Wurth www.wurth.co.uk Generic 0603 Murata 1206 www.murata.com Murata 1206 www ...
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... LED current from 100 for a voltage change of only 25mV, so any noise on the bottom of the thermistor will seriously affect the accuracy of the Thermal Protection circuit. Issue 1 - January 2008 © Zetex Semiconductors plc 2008 resistor R1 will still give an accurate SENSE , which could perhaps SAT 16 ZXLD1322 www.zetex.com ...
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... Issue 1 - January 2008 © Zetex Semiconductors plc 2008 Millimeters DIM Min Max 0.80 0.90 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 ZXLD1322 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 ZXLD1322 www.zetex.com ...