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ISL97678IRZ Datasheet(PDF) 6 Page - Intersil Corporation |
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ISL97678IRZ Datasheet(HTML) 6 Page - Intersil Corporation |
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6 / 18 page  6 FN6998.1 November 5, 2009 Eff_peak Peak Efficiency VIN = 24V, 96LEDs, 20mA each, L = 10µH with DCR ≤100mΩ, FSW = 600kHz, TA = +25°C 92.4 % VIN = 12V, 96 LEDs, 20mA each, L = 10µH with DCR ≤100mΩ, FSW = 600kHz, TA = +25°C 91.5 % VIN = 6V, 96 LEDs, 20mA each, L = 10µH with DCR ≤100mΩ, FSW = 600kHz, TA = +25°C 81.6 % VIN = 24V, 80 LEDs, 40mA each, L = 10µH with DCR ≤100mΩ, FSW=600kHz, TA = +25°C 93.4 % VIN = 12V, 80 LEDs, 40mA each, L = 10µH with DCR ≤100mΩ, FSW = 600kHz, TA = +25°C 90.7 % DMAX Boost Maximum Duty Cycle fSW = 500kHz 90 % DMIN Boost Minimum Duty Cycle fSW = 500kHz 10 % fSW Boost Switching Frequency Rfsw = 100kΩ 0.45 0.5 0.55 MHz Rfsw = 33kΩ 1.35 1.5 1.65 MHz ILX_leakage Lx Leakage Current VLX = 45V, /SHUT = 0V 10 µA REFERENCE IMATCH Channel-to-Channel Current Matching ILED = 20mA -1.1 ±0.7 +1.1 % IACC Absolute Current Accuracy IRSET = 36kΩ, TA = +25°C -1.5 +1.5 % IRSET = 36kΩ, TA =-40°C to +80°C -2 +2 % FAULT DETECTION VSC Channel Short Circuit Threshold 3.3 4.6 V Vtemp Over-Temperature Threshold 150 °C Vtemp_acc Over-Temperature Threshold Accuracy 5 °C VOVP Overvoltage Limit on OVP Pin 1.18 1.22 1.24 V DIGITAL INTERFACE VIL Logic Input Low Voltage 0.8 V VIH Logic Input High Voltage 1.5 5.5 V CURRENT SOURCES VHEADROOM Dominant Channel Current Source Headroom at CH Pin ILED = 50mA TA = +25°C 1.0 V Electrical Specifications All specifications below are characterized at TA = -40°C to +85°C; VIN = 12V, /SHUT = 5V, ISET = 36kΩ, unless otherwise noted. Boldface limits apply over the operating temperature range, -40°C to +85°C. (Continued) PARAMETER DESCRIPTION CONDITION MIN (Note 7) TYP MAX (Note 7) UNIT ISL97678 |
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