HV9971LG-G Microchip

Supertex inc. HV9971 Isolated, Constant Current LED Driver Features General Description Programmable true constant current operation The HV9971 is a primary-side control IC for driving a discontinuous 3% LED current accuracy conduction mode (DCM) flyback LED driver. The IC is optimized for operation at a constant full-load switching frequency of 100kHz and Adaptive to external component tolerances and parasitics the universal input AC voltage range of 80-264VAC. It maintains Primary-side current sensing 3% variation of the LED current setting, and features tight line Output open circuit protection and load regulation. The proprietary primary-side output current control employed in the HV9971 makes the output current setting Output short circuit protection insensitive to most component tolerances and parasitics without Input under voltage lockout use of an opto-feedback. PWM dimming / enable Universal 80-264VAC operation The HV9971 LED driver is fully protected against output open and short circuit conditions and input under-voltage. It also offers a logic Applications input for dimming the LED light output by means of pulse-width modulation of the output current. Low-power lighting fixtures The HV9971 is ideally suited for driving high-brightness LEDs in low-power lighting fixtures such as incandescent bulb retrofits. Typical Application Circuit I O V IN R IN 2 VIN R BIAS PWMD BIAS 4 1 HV9971 GATE 7 GND CS 6 5 R DD VD VDD R S 3 8 R D C DD Doc. DSFP-HV9971 Supertex inc. A032814 www.supertex.comHV9971 Pin Configuration Ordering Information Part Number Package Option Packing BIAS 1 8 VDD HV9971LG-G 8-Lead SOIC 2500/Reel 2 7 VIN GATE -G denotes a lead (Pb)-free / RoHS compliant package VD 3 6 GND PWMD 4 5 CS Absolute Maximum Ratings* 8-Lead SOIC Parameter Value VIN, VD, BIAS current 5.0mA Product Marking VDD voltage -0.3V to V Y = Last Digit of Year Sealed SHUNT YWW WW = Week Sealed VDD current 10mA H9971 L = Lot Number LLLL = Green Packaging GATE voltage -0.3V to V +0.3V DD Package may or may not include the following marks: Si or CS, PWMD voltage -0.3V to 6.0V 8-Lead SOIC Operating temperature range -40C to +125C Storage temperature range -65C to +150C Typical Thermal Resistance Continuous power dissipation 630mW Package (T = +25C) (derate 6.3mW/C above +25C) ja A * All voltages referenced to GND pin. 8-Lead SOIC 101C/W Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Electrical Characteristics (Specifications are at T = 25C, V = 10V, I = 200A, C = 750pF, BIAS open, unless otherwise noted). A DD IN GATE Sym Description Min Typ Max Units Conditions Power Supply (VDD) V Shunt voltage * 10.5 11.0 11.5 V --- DD V Start voltage * 9.95 10.50 11.45 V V rising DD(START) DD V Under voltage threshold * 6.65 7.00 7.70 V V falling DD(STOP) DD I Supply standby current - - - 1.0 mA Gate open DDQ I Start-up current * - - 65 A V = 10V DDQ(START) DD Notes: * Specifications which apply over the full operating ambient temperature range of -40C < T < +125C. A Parameters guaranteed by design Doc. DSFP-HV9971 Supertex inc. A032814 2 www.supertex.com