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ISL97672_1011 Datasheet(PDF) 5 Page - Intersil Corporation |
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ISL97672_1011 Datasheet(HTML) 5 Page - Intersil Corporation |
5 / 17 page ISL97672 5 FN7632.1 November 1, 2010 REGULATOR VDC LDO Output Voltage VIN > 6V 4.55 4.8 5 V IVDC_STBY Standby Current EN = 0V 5 µA IVDC Active Current EN = 5V 5 mA VLDO VDC LDO Droop Voltage VIN > 5.5V, 20mA 20 200 mV ENLow Guaranteed Range for EN Input Low Voltage 0.5 V ENHi Guaranteed Range for EN Input High Voltage 1.8 V tENLow EN low time before shut-down 30.5 ms BOOST SWILimit Boost FET Current Limit 1.5 2.0 2.7 A rDS(ON) Internal Boost Switch ON-Resistance TA = +25°C 235 300 mΩ SS Soft-start 100% LED Duty Cycle 7 ms Eff_peak Peak Efficiency VIN = 12V, 72 LEDs, 20mA each, L = 10µH with DCR 101mΩ, TA = +25°C 92.9 % VIN = 12V, 60 LEDs, 20mA each, L = 10µH with DCR 101mΩ, TA = +25°C 90.8 % ΔIOUT/ΔVIN Line Regulation 0.1 % Dmax Boost Maximum Duty Cycle FSW = 600kHz 90 % FSW = 1.2MHz 81 % Dmin Boost Minimum Duty Cycle FSW = 600kHz 9.5 % FSW = 1.2MHz 17 % fS Minimum Switching Frequency RFSW = 200kΩ 175 200 235 kHz fS Maximum Switching Frequency RFSW = 33kΩ 1.312 1.50 1.69 MHz ILX_leakage LX Leakage Current LX = 45V, EN = 0 10 µA CURRENT SOURCES IMATCH Channel-to-Channel Current Matching RSET =20.1kΩ (IOUT = 20mA) ±0.7 ±1.0 % IACC Current Accuracy -1.5 +1.5 % Vheadroom Dominant Channel Current Source Headroom at IIN Pin ILED = 20mA TA = +25°C 500 mV VRSET Voltage at RSET Pin RSET = 20.1kΩ 1.2 1.22 1.24 mV ILEDmax Maximum LED Current per Channel VIN = 12V, VOUT = 45V, Fsw = 1.2MHz, TA =+25°C 40 mA FAULT DETECTION VSC Short Circuit Threshold PWM Dimming = 100% 5.2 5.85 6.6 V Temp_shtdwn Temperature Shutdown Threshold 150 °C Temp_Hyst Temperature Shutdown Hysteresis 23 °C Electrical Specifications All specifications below are tested at TA = +25°C; VIN = 12V, EN = 5V, RSET = 20.1kΩ, unless otherwise noted. Boldface limits apply over the operating temperature range, -40°C to +85°C. (Continued) PARAMETER DESCRIPTION CONDITION MIN (Note 8) TYP MAX (Note 8) UNIT |
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