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ZXLD1366DACTC Datasheet(PDF) 4 Page - Diodes Incorporated |
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ZXLD1366DACTC Datasheet(HTML) 4 Page - Diodes Incorporated |
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4 / 30 page  ZXLD1366 Document number: DS31992 Rev. 9 - 2 4 of 31 www.diodes.com April 2016 © Diodes Incorporated ZXLD1366 Electrical Characteristics (Test conditions: (@ VIN = 24V, TA = +25°C, unless otherwise specified.) Symbol Parameter Condition Min Typ Max Unit VSU Internal Regulator Start-up Threshold - - 4.85 5.20 V VSD Internal Regulator Shutdown Threshold - 4.40 4.75 - V IINQoff Quiescent Supply Current with Output off ADJ pin grounded - 65 108 µA IINQon Quiescent Supply Current with Output Switching (Note 10) ADJ pin floating, L = 68µH, 3 LEDs, f = 260kHz - 1.6 - mA VSENSE Mean Current Sense Threshold Voltage (Defines LED current setting accuracy) Measured on ISENSE pin with respect to VIN VADJ = 1.25V; VIN = 18V 195 200 205 mV VSENSEHYS Sense Threshold Hysteresis - - ±15 - % ISENSE ISENSE Pin Input Current VSENSE = VIN -0.2 - 4 10 µA VREF Internal Reference Voltage Measured on ADJ pin with pin floating - 1.25 - V VREF/T Temperature Coefficient of VREF - - 50 - ppm/°C VADJ External Control Voltage Range on ADJ pin for DC Brightness Control (Note 11) - 0.3 - 2.5 V VADJoff DC Voltage on ADJ Pin to Switch Device from Active (on) State to Quiescent (off) State VADJ falling 0.15 0.20 0.27 V VADJon DC voltage on ADJ pin to switch device from quiescent (off) state to active (on) state VADJ rising 0.20 0.25 0.30 V RADJ Resistance between ADJ Pin and VREF 0 < VADJ < VREF VADJ > VREF +100mV 30 10.4 50 14.2 65 18.0 kΩ ILXmean Continuous LX Switch Current - - - 1 A RLX LX S witch ‘On’ Resistance @ ILX = 1A - 0.50 0.75 Ω ILX(leak) LX Switch Leakage Current - - - 5 µA DPWM(LF) Duty Cycle Range of PWM Signal Applied to ADJ Pin During low Frequency PWM Dimming Mode PWM frequency < 300Hz PWM amplitude = VREF Measured on ADJ pin 0.001 - 1.000 V Brightness Control Range - - 1000:1 - - DCADJ DC Brightness Control Range (Note 11) - 5:1 - - tSS Soft Start Time Time taken for output current to reach 90% of final value after voltage on ADJ pin has risen above 0.3V. Requires external capacitor 22nF. See graphs for more details - 2 - ms fLX Operating Frequency (See graphs for more details) ADJ pin floating L = 68µH (0.2V) IOUT = 1A @ VLED = 3.6V Driving 3 LEDs - 260 - kHz tONmin Minimum S witch ‘ON’ Time LX switch ‘ON’ - 130 - ns tOFFmin Minimum S witch ‘OFF’ Time LX switch ‘OFF’ - 70 - Notes: 9. 100% brightness corresponds to VADJ = VADJ(nom) = VREF. Driving the ADJ pin above VREF will increase the VSENSE threshold and output current proportionally. 10. Static current of device is approximately 700 µA, see Graph, Page 16. 11. Ratio of maximum brightness to minimum brightness before shutdown VREF = 1.25/0.3. VREF externally driven to 2.5V, ratio 10:1. |
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