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ZXLD1356QDACTC Datasheet(PDF) 4 Page - Diodes Incorporated |
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ZXLD1356QDACTC Datasheet(HTML) 4 Page - Diodes Incorporated |
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4 / 28 page  ZXLD1356Q Document number: DS37077 Rev. 2 - 2 4 of 28 www.diodes.com October 2015 © Diodes Incorporated ZXLD1356Q Q Electrical Characteristics (VIN = 24V, @TA = +25°C, unless otherwise specified.) Symbol Parameter Condition Min Typ Max Unit VSU Internal Regulator Start-Up Threshold — — 4.85 5.2 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 7) ADJ Pin Floating, L = 68mH, 3 LEDsf = 360kHz — 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 8) — 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 0.2 0.25 0.3 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 — — — 0.55 A RLX LX Switch ‘On’ Resistance @ ILX = 0.55A — 0.5 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 — Brightness Control Range — 1,000:1 — — DCADJ (*) DC Brightness Control Range (Note 9) — 5:1 — — tSS Start-Up Time (See Graphs for More Details) 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 — 2 — ms FLX Operating Frequency (See Graphs for More Details) ADJ Pin Floating L= 68mH (0.36V) IOUT = 0.55A @ VLED = 3.6V Driving 3 LEDs — 360 — kHz Notes: 7. Static current of device is approximately 700µA, see Supply Current Graph, Page 15. 8. 100% brightness corresponds to VADJ = VADJ(nom) = VREF. Driving the ADJ pin above VREF will increase the VSENSE threshold and output current proportionally. 9. Ratio of maximum brightness to minimum brightness before shutdown VREF =1.25/0.25. VREF externally driven to 2.5V, ratio 10.1. |
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