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HV9861ANG-G Datasheet(PDF) 3 Page - Supertex, Inc |
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HV9861ANG-G Datasheet(HTML) 3 Page - Supertex, Inc |
3 / 9 page 3 Supertex inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com HV9861A Sym Description Min Typ Max Unit Conditions Internal Regulator V DD Internally regulated voltage - 7.25 7.50 7.75 V 500pF at GATE; R T = 226kΩ ΔV DD, line Line regulation of V DD - - - 1 V V IN = 12 - 450V, 500pF at GATE; R T = 226kΩ ΔV DD, load Load regulation of V DD - - - 100 mV I DD(ext) = 0 - 1mA, 500pF at GATE; R T = 226kΩ UVLO V DD undervoltage lockout threshold * 6.45 - - V V IN rising ∆UVLO V DD undervoltage lockout hysteresis - - 500 - mV V IN falling ∆V DD(UV) V DD voltage margin * 500 - - mV ∆V DD(UV) = VDD - UVLO I IN,MAX Maximum input current (limited by UVLO) # 3.5 - - mA V IN = 12V, TA = 25 O C # 1.5 - - V IN = 12V, TA = 125 O C PWM Dimming V EN(lo) PWMD input low voltage * - - 0.8 V V IN = 12 - 450V V EN(hi) PWMD input high voltage * 2.2 - - V V IN = 12 - 450V I EN Internal pull-down current at PWMD - 8.5 - 13.5 μA V PWMD = 0.8V Average Current Sense Logic V CS Current sense reference voltage - 262 - 280 mV --- A V(LD) LD-to-CS voltage ratio - 0.175 - 0.182 - --- A V • VLD(OFFSET) LD-to-CS voltage offset - -10 - 10 mV Offset = V CS - (AV(LD) • VLD); V LD = 1.2V ΔV CS(TEMP) CS threshold temp regulation # - - 5 mV --- V LD(OFF) LD input voltage, shutdown - - 150 - mV V LD falling ΔV LD(OFF) LD input voltage, enable - - 200 - mV V LD rising T BLANK Current sense blanking interval * 140 - 290 ns --- T ON(min) Minimum on-time - - - 760 ns CS = V CS + 30mV D MAX Maximum steady-state duty cycle * 80 - - % Reduction in output LED current may occur beyond this duty cycle Short Circuit Protection V CS Hiccup threshold voltage * 410 - 500 mV --- T DELAY Current limit delay CS-to-GATE - - - 150 ns CS = V CS + 30mV T HICCUP Short circuit hiccup time - 500 - 850 μs --- T ON(min) Minimum on-time (short circuit) - - - 430 ns CS = V DD Notes: * Denotes the specifications which apply over the full operating ambient temperature range of -40°C < T A < +125°C. # Guaranteed by design. Electrical Characteristics (Specifications are at T A = 25°C. VIN = 12V, VLD = VDD, PWMD = VDD unless otherwise noted)) |
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