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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ZXLD1366DACTC датащи(PDF) 4 Page - Diodes Incorporated |
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ZXLD1366DACTC датащи(HTML) 4 Page - Diodes Incorporated |
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4 / 30 page  ZXLD1366 ZXLD1366 Document number: DS31992 Rev. 7 - 2 4 of 30 www.diodes.com May 2012 © Diodes Incorporated A Product Line of Diodes Incorporated 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 9) 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 ΔVREF/ΔT Temperature coefficient of VREF 50 ppm/°C VADJ External control voltage range on ADJ pin for DC brightness control (Note 7) 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 k Ω ILXmean Continuous LX switch current 1 A RLX LX switch ‘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 8) 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 switch ‘ON’ time LX switch ‘ON’ 130 tOFFmin Minimum switch ‘OFF’ time LX switch ‘OFF’ 70 Notes: 9. Static current of device is approximately 700 µA, see Graph, Page 16 10. 100% brightness corresponds to VADJ = VADJ(nom) = VREF. Driving the ADJ pin above VREF will increase the VSENSE threshold and output current proportionally. 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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