HV9963 Closed Loop LED Driver with Enhanced PWM Dimming Features General Description Switch mode controller for single switch converters The HV9963 is a current mode control LED driver IC designed Buck to control single switch PWM converters (buck, boost, buck-boost or SEPIC) in a constant frequency mode. The Boost controller uses a peak current-mode control scheme (with Buck-boost and SEPIC programmable slope compensation) and includes an internal High output current accuracy transconductance amplier to accurately control the output High PWM dimming ratio (>5000:1) current over all line and load conditions. Multiple HV9963s Internal 40V linear regulator can be synchronized to each other or to an external clock Internal 2% voltage reference using the SYNC pin. The IC also provides a disconnect switch Constant frequency operation with sync capability gate drive output, which can be used to disconnect the LEDs in case of a fault condition using an external disconnect Programmable soft start FET. The 10V external FET drivers allow the use of standard 10V GATE drivers level FETs. The low voltage 5.0V AVDD is used to power the Hiccup mode protection for both short circuit and internal logic and also acts as a reference voltage to set the open circuit conditions current level. Applications The HV9963 includes an enhanced PWM dimming logic (patent RGB or white LED backlighting pending) that enables very high PWM dimming ratios. Battery powered LED lamps HV9963 also provides a TTL compatible, low-frequency PWM Other DC/DC LED drivers dimming input that can accept an external control signal with a duty ratio of 0-100% and a frequency of up to a few tens of kilohertz. Typical Application Circuit D2 (optional) C D1 IN Q1 R OVP1 C O C SC R R OVP2 CS C PVDD PVDD GT CS OVP Q2 VIN FLT GND FB HV9963 PWMD IREF R S HCP SS COMP RT AVDD SYNC C R C C HCP SS C REF1 C R R AVDD REF2 T 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.comHV9963 Ordering Information Pin Description 16-Lead SOIC VIN 1 16 FB 9.90x3.90mm body Device PVD D 2 15 IREF 1.75mm height (max) 1.27mm pitch 3 GT 14 COMP 4 13 GND PWMD HV9963 HV9963NG-G CS 5 12 OVP -G indicates package is RoHS compliant (Green) HCP 6 11 FLT RT 7 10 AVD D Absolute Maximum Ratings SYN C 8 9 SS Parameter Value 16-Lead SOIC (NG) VIN to GND -0.5V to +45V PVDD to GND -0.3V to +13V Product Marking Top Marking GATE, FT to GND -0.3V to (PV +0.3V) DD Y = Last Digit of Year Sealed HV9963NG AVDD to GND -0.3V to 6.0V WW = Week Sealed YWW LLLLLLLL L = Lot Number IREF to GND -0.3V to 3.5V C = Country of Origin* Bottom Marking A = Assembler ID* All other pins to GND -0.3V to (AV +0.3V) = Green Packaging DD CCCCCCCCC AAA *May be part of top marking Junction temperature +150C Package may or may not include the following marks: Si or Storage ambient temperature range -65C to +150C 16-Lead SOIC (NG) Continuous power dissipation (T = +25C) 1000mW A Stresses beyond those listed under Absolute Maximum Ratings may cause Typical Thermal Impedance 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 Package JA the operational sections of the specications is not implied. Exposure to absolute O 16-Lead SOIC 82 C/W maximum rating conditions for extended periods may affect device reliability. Electrical Characteristics O O (The * denotes the specications which apply over the full operating ambient temperature range of -40 C < T < +125 C, otherwise the specications are A O at T = 25 C. V = 24V, C = 1.0F, C = 1.0F, C = 2.0nF, C = 330pF unless otherwise noted.) A IN PVDD AVDD GATE FLT Sym Description Min Typ Max Units Conditions Input V Input DC supply voltage range - 8.0 - 40 V DC input voltage INDC I Shut-down mode supply current - - - 2.0 mA PWMD to GND INSD Internal Regulator for GATE Drivers V = 12-40V, IN PV Internally regulated voltage - 9.5 10 10.5 V R = 44.2k, DD T PWMD = AV DD UVLO V under voltage lockout threshold * 6.55 - 7.20 V PV rising RISE DD DD UVLO V under voltage hysteresis - - 500 - mV PV falling HYST DD DD V = 9.0V, R = 44.2k, IN T PV Minimum V voltage * 8.0 - - V DD,MIN DD PWMD = AV DD Note: * Denotes the specications which apply over the full operating ambient temperature range of -40C < T < +125C. A 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com 2