ZXLD1362ET5TA Diodes Zetex, ZXLD1362ET5TA Datasheet
ZXLD1362ET5TA
Specifications of ZXLD1362ET5TA
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ZXLD1362ET5TA Summary of contents
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Description The ZXLD1362 is a continuous mode inductive step-down converter with integrated switch and high side current sense. It operates from an input supply from 6V to 60V driving single or multiple series connected LEDs efficiently externally adjustable output current ...
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Block Diagram V IN Voltage C1 regulator 4.7µF GND ADJ 3 R4 50k D1 1.25V GND GND 2 Pin Description Pin Name No Drain of NDMOS switch GND 2 Ground (0V) Multi-function On/Off and brightness control pin: • ...
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Absolute Maximum Ratings Symbol Input Voltage Voltage SENSE SENSE V LX Output Voltage LX V Adjust Pin Input Voltage ADJ I Switch Output Current LX Power Dissipation P TOT (Refer to Package thermal de-rating curve on ...
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Electrical Characteristics (Test conditions: V Symbol Parameter V Internal regulator start-up threshold SU V Internal regulator shutdown threshold SD I Quiescent supply current with output off INQoff Quiescent supply current with output I INQon switching (Note 4) Mean current sense ...
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Device Description The device, in conjunction with the coil (L1) and current sense resistor (R converter. Device operation (refer to Figure 1 - Block diagram and Figure 2 Operating waveforms) Operation can be best understood by assuming that the ADJ ...
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Device Description Figure 2. Theoretical Operating Waveforms ZXLD1362 Document number: DS33472 Rev Product Line of Diodes Incorporated www.diodes.com ZXLD1362 March 2011 © Diodes Incorporated ...
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Device Description (continued) Actual operating waveforms [V IN Normal operation. Output current (Ch1) and LX voltage (Ch2) Actual operating waveforms [V IN Normal operation. Output current (Ch1) and LX voltage (Ch2) Actual operating waveforms [V IN Normal operation. Output current ...
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Typical Characteristics 1100 1090 1080 1070 1060 1050 1040 1030 1020 1010 1000 LED 10 -2% -4% -6% -8% -10 LED 100% 90% 80% 70% 60% 50% 0 ...
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Typical Characteristics (cont.) 500 400 300 200 100 LED 3 LED 100 LED 3 LED ZXLD1362 Document number: DS33472 Rev ...
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Typical Characteristics (cont.) 1100 1090 1080 1070 1060 1050 1040 1030 1020 1010 1000 LED 10 -2% -4% -6% -8% -10 LED 100% 90% 80% 70% 60% 50% ...
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Typical Characteristics (cont.) 500 400 300 200 100 LED 3 LED 100 LED 3 LED ZXLD1362 Document number: DS33472 Rev ...
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Typical Characteristics (cont.) 1100 1090 1080 1070 1060 1050 1040 1030 1020 1010 1000 LED 10 -2% -4% -6% -8% -10 LED 100% 90% 80% 70% 60% 50% ...
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Typical Characteristics (cont.) 500 400 300 200 100 LED 3 LED 100 LED 3 LED ZXLD1362 Document number: DS33472 Rev ...
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Typical Characteristics (cont.) 1100 1090 1080 1070 1060 1050 1040 1030 1020 1010 1000 LED 10 -2% -4% -6% -8% -10 LED 3 LED 100% 90% 80% 70% 60% ...
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Typical Characteristics (cont.) 500 400 300 200 100 LED 3 LED 100 LED 3 LED ZXLD1362 Document number: DS33472 Rev. 3 ...
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Typical Characteristics (cont.) 1200 1000 800 600 400 200 0 0 800 700 600 500 400 300 200 100 0 0 1.243 1.2425 1.242 1.2415 1.241 1.2405 1.24 1.2395 1.239 1.2385 1.238 ...
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Typical Characteristics (cont.) 1.6 1.4 1.2 1 0.8 0.6 0.4 0 1.262 1.26 1.258 1.256 1.254 1.252 1.25 1.248 1.246 1.244 -50 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 -50 ZXLD1362 Document number: DS33472 Rev. 3 ...
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Application Information Setting nominal average output current with external resistor R The nominal average output current in the LED(s) is determined by the value of the external current sense resistor (R connected between V and I and is given by: ...
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Application Information (cont.) Output Current Adjustment by PWM Control Directly driving ADJ input A Pulse Width Modulated (PWM) signal with duty cycle D output current to a value above or below the nominal average value set by resistor R PWM ...
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Application Information (cont.) Shutdown Mode Taking the ADJ pin to a voltage below 0.2V for more than approximately 100µs will turn off the output and supply current to a low standby level of 20µA nominal. Note that the ADJ pin ...
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Application Information (cont.) V Capacitor Selection IN A low ESR capacitor should be used for input decoupling, as the ESR of this capacitor appears in series with the supply source impedance and lowers overall efficiency. This capacitor has to supply ...
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Application Information (cont.) Inductor Selection Recommended inductor values for the ZXLD1362 are in the range 68μH to 220μH. Higher values of inductance are recommended at higher supply voltages in order to minimize errors due to switching delays, which result in ...
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Application Information (cont.) Diode Selection For maximum efficiency and performance, the rectifier (D1) should be a fast low capacitance Schottky diode* with low reverse leakage at the maximum operating voltage and temperature. They also provide better efficiency than silicon diodes, ...
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Application Information (cont.) Operation at low supply voltage Below the under-voltage lockout threshold (VSD) the drive to the output transistor is turned off to prevent device operation with excessive on-resistance of the output transistor. The output transistor is not full ...
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Application Information (cont.) Layout Considerations LX pin The LX pin of the device is a fast switching node, so PCB tracks should be kept as short as possible. To minimize ground 'bounce', the ground pin of the device should be ...
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Application Information (cont.) Dimming Output Current Using PWM Low frequency PWM mode When the ADJ pin is driven with a low frequency PWM signal (eg 100Hz), with a high level voltage V zero, the output of the internal low pass ...
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... Ordering Information Package Device Part Mark Code ZXLD1362ET5TA 1362 ET5 Package Outline Dimensions TSOT23-5 ZXLD1362 Document number: DS33472 Rev Product Line of Diodes Incorporated Packaging Reel size Reel width (Note 4) (mm) (mm) TSOT23-5 180 www.diodes.com ZXLD1362 Part AEC-Q100 Quantity Number grade per reel ...
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DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY ...