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ISL97687IRTZ Datasheet(PDF) 7 Page - Intersil Corporation |
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ISL97687IRTZ Datasheet(HTML) 7 Page - Intersil Corporation |
7 / 24 page ISL97687 7 FN7714.2 November 13, 2013 DMAX Boost Maximum Duty Cycle fSW = 600kHz 92 % DMIN Boost Minimum Duty Cycle fSW = 1.2MHz 26 % fSW Boost Switching Frequency (See Equation 4) ROSC = 250kΩ 180 200 220 kHz ROSC = 83kΩ 540 600 660 kHz ROSC = 42kΩ 1.08 1.2 1.32 MHz EFFPEAK Boost Peak Efficiency 90 % REFERENCE IMATCH Channel-to-Channel Current Matching Channels are in a single IC, ILED: 100mA -2 ±1 2 % IACC Absolute Current RISET1/2 = 28.7kΩ -3 3 % FAULT DETECTION VSC Channel Short Circuit Threshold 7.2 8 8.8 V VTEMP Over-Temperature Threshold 150 °C VTEMP_ACC Over-Temperature Threshold Accuracy 5 °C VOVP_OUT Overvoltage Limit on OVP Pin 1.18 1.22 1.24 V VOVP_IN Overvoltage Limit on VIN Pin 35 V DIGITAL I/O LOGIC LEVEL SPECIFICATIONS VIL Logic Input Low Voltage - STV, EN_PS, EN_VSYNC, EN_ADIM, PWMI, CSEL, EN 0.8 V VIH Logic Input High Voltage - STV, EN_PS, EN_VSYNC, EN_ADIM, PWMI, CSEL, EN 1.5 5.5 V STV Frame frequency 30 240 Hz CURRENT SOURCES VHEADROOM Dominant Channel Current Source Headroom at CH Pin ILED = 160mA TA = +25°C 0.75 V VISET1,2 Voltage at ISET1 and 2 Pins 1.18 1.21 1.24 V ILED_MAX Maximum LED Current per Channel 160 mA PWM GENERATOR fPWM Generated PWM Frequency (See Equation 3) RPWM_SET = 333kΩ 45 50 55 Hz RPWM_SET = 3.3kΩ 4.5 5 5.5 kHz Dimming Range PWM Dimming Duty Cycle Limits fPWM ≤ 20kHz 0.1 100 % fPWMI PWMI Input Frequency Range 60 20k Hz VPWM_SET PWM_SET Voltage RPWM_SET = 3.3kΩ 1.18 1.21 1.25 V VACTL Analog Dimming Input 0% Dimming 0.28 0.3 0.31 V 100% Dimming 2.95 3 3.1 V tPWM_MIN Minimum PWM On Time in Direct PWM Mode 350 ns NOTES: 9. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization and are not production tested. 10. At maximum VIN of 32V, minimum VOUT is 35V. Minimum VOUT can be lower at lower VIN. Electrical Specifications All specifications below are characterized at T A = -40°C to +105°C; VIN = 12V, EN = 5V. Boldface limits apply over the operating temperature range, -40°C to +105°C. (Continued) PARAMETER DESCRIPTION CONDITION MIN (Note 9) TYP MAX (Note 9) UNIT |
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