Supertex inc. HV9910BDB2 Universal, Off-Line, High Brightness, 350mA LED Driver Demoboard General Description The Supertex HV9910BDB2 demoboard is a High Brightness LED power driver to supply a string of LEDs using the HV9910B IC from a universal AC input. The HV9910BDB2 can supply a maximum output current of 350mA to drive 10 - 40V LED strings from a wide input voltage - 90 to 265VAC, 50/60Hz. The power conversion stage of the HV9910BDB2 consists of a diode bridge rectifier, followed by a current-controlled buck converter operating at a switching frequency of 50kHz. The nominal output current of the demoboard can be adjusted to any value between 30 and 350mA using the on-board trimming potentiometer. PWM dimming can be achieved by applying a pulse-width-modulated square wave signal between the PWMD and GND pins. Zero output current can be obtained only by PWM dimming. The HV9910BDB2 is not CISPR-15 compliant. Additional filtering is required to make the board meet CISPR-15 limits. Specifications Parameter Value Input voltage 90 - 265Vrms, 50/60Hz Output voltage 10 - 40V Output current 350mA max Output current ripple (typ) @110V input 25% (peak-peak) @40V output, 350mA 88% @110VAC Full load efficiency 86% @230VAC 0.70 @110VAC Power factor 0.48 @230VAC 0.20A @110VAC Input current (rms) 0.14A @230VAC 94% @110VAC Input current THD 95% @230VAC Switching frequency (typ) Minimum output current Open LED protection 50kHz 20mA @110VAC 30mA @230VAC yes Output short circuit protection Dimensions no 68.6mm X 49.6mm Connection Diagram 10 - 40V, 350mA max. WARNING!!! 90 - 265VAC 50/60Hz Do not connect earth-grounded test instruments. Doing so will short the AC line, resulting in damage to the instrument and/or the HV9910BDB2. Use floating high voltage differential probes or isolate the demoboard by using an isolating transformer. There is no galvanic isolation. Dangerous voltages are present when connected to the AC line. Doc.# DSDB-HV9910BDB2 A032813 Supertex inc. www.supertex.com HV9910BDB2 Connections PWM Dimming 1. Connect the input AC voltage between the AC IN terminals as shown in the connection diagram. The HV9910BDB2 is capable of being PWM dimmed by applying a square wave TTL compatible signal between PWMD and GND terminals. However, since there is no galvanic isolation on the board, care must be taken to prevent damage to the PWM dimming source and/or the HV9910BDB2. One simple way is to isolate the LED driver from the AC line using an isolation transformer. Another approach is to use an opto-isolator to drive the PWMD pin as shown in the figure below. 2. Connect the LED string between LED+ (anode of LED string) and LED- (cathode of LED string). 3. Connect the PWMD terminal to the VDD terminal using the jumper provided to enable the LED driver. 4. The current level can be adjusted using the on-board potentiometer. 3.8kΩ VDD 5.0V square wave signal (<1.0kHz) Opto-isolator (eg: LTV-814 from Lite-On) PWMD Typical Results Efficiency vs.Input Voltage 90 40V output 80 75 10V output 70 65 80 % change in LED Current 130 180 230 Input Voltage (VAC) 280 230VAC Input 75 70 60 Current Regulation vs. Input Voltage 10 5 20 10V Output 0 40V Ouput -5 -10 80 65 % change in LED Current 60 110VAC Input 85 Efficiency (%) Efficiency (%) 85 Efficiency vs. LED String Voltage 90 80 Doc.# DSDB-HV9910BDB2 A032813 130 180 230 Input Voltage (VAC) 2 10 20 30 LED String Voltage (V) 40 50 Current Regulation vs. LED String Voltage 15 230VAC Input 10 110VAC Input 5 0 280 0 0 10 20 30 LED String Voltage (V) 40 50 Supertex inc. www.supertex.com HV9910BDB2 Waveforms LED Current LED Current Drain Voltage Drain Voltage Steady State waveforms at 230VAC input and full load output Steady State waveforms at 110VAC input and full load output LED Current LED Current Drain Voltage Drain Voltage Steady State waveforms at 90VAC input and 40V, 350mA output Doc.# DSDB-HV9910BDB2 A032813 Steady State waveforms at 230VAC input and 10V, 350mA output 3 Supertex inc. www.supertex.com HV9910BDB2 Silk Screen Schematic Diagram 1 J1 1 2 t F1 C4 0.1µF 305VAC RT1 CL-140 U1 2.0A 250VAC 4 AC1 POS AC2 NEG C1 22µF 400V D1 STTH2RU06U C3 47µF 400VAC C5 47µF 400V 1 U2 J3A VIN 12 1 R2 178k VDD RT HV9910B 13 GATE LD 9 C8 2.2µF 16V 1 R3 5k PWMD GND 5 C6 1.0µF R5 1.0k CS L1 J2 2 1 2 4.7mH RL-1292-4700 R1 464k 14 8 Q1 STD7NM50N 4 C7 100pF R4 1.0k R6 0.56 R7 1.0k J3B Doc.# DSDB-HV9910BDB2 A032813 J3C 4 Supertex inc. www.supertex.com HV9910BDB2 Bill of Materials Package Manufacturer Manufacturer’s Part Number 22µF, 400V electrolytic capacitor Radial Nichion UVR2G220MHD 0.47µF, 400V metal film capacitor Radial EPCOS Inc B32522C6474K C4 0.1µF, 305VAC EMI suppresion capacitor Radial EPCOS Inc B32922C3104M 1 C6 0.1µF, 16V X7R ceramic chip capacitor SMD0805 Panasonic ECJ-2VB1C104K 5 1 C7 100pF, 50V C0G ceramic chip capacitor SMD0805 TDK Corp C2012C0G1H101J 6 1 C8 2.2µF, 16V X7R ceramic chip capacitor SMD0805 TDK Corp C2012X7R1C225K 7 1 D1 600V, 2.0A ultrafast diode SMB ST Micro STTH2R06U 8 1 F1 2.0A, 250VAC time lag fuse Radial Cooper Bussman SR-5-2A-BK 9 1 H1 15C/W DPAK heatsink SMT Aavid 7106PD 10 2 J1,J2 2 position, 0.156” pitch, vertical header Thru-Hole Molex 26-48-1021 11 1 J3 3 position, 0.100” pitch, vertical header Thru-Hole Molex 22-03-2031 12 1 L1 4.7mH, 400mA rms, 470mA sat inductor Axial Renco USA RL-1292-4700 13 1 Q1 550V, 0.7Ω N-channel FET DPAK ST Micro STD5NM50 14 1 RT1 50Ω NTC inrush limiter Thru-Hole GE Sensing CL-140 15 1 R1 464KΩ, 1/8W, 1% chip resistor SMD0805 --- --- 16 1 R2 178KΩ, 1/8W, 1% chip resistor SMD0805 --- --- 17 1 R3 5.0KΩ top adjust trimpot SMT Bourns Inc 3361P-1-502G 18 3 SMD0805 --- --- 19 1 R6 0.56Ω, 1/4W, 1% chip resistor SMD1206 --- --- 20 1 U1 400V, 1.0A single phase diode bridge DF-S Diodes Inc DF04S 21 1 U2 Universal LED Driver SO-16 Supertex HV9910BNG-G # Qty RefDes 1 1 C1 2 2 C3,C5 3 1 4 Description R4,R5,R7 1.0KΩ, 1/8W, 1% chip resistor Supertex inc. does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such applications unless it receives an adequate “product liability indemnification insurance agreement.” Supertex inc. does not assume responsibility for use of devices described, and limits its liability to the replacement of the devices determined defective due to workmanship. No responsibility is assumed for possible omissions and inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications refer to the Supertex inc. (website: http//www.supertex.com) Supertex inc. ©2013 Supertex inc. All rights reserved. Unauthorized use or reproduction is prohibited. Doc.# DSDB-HV9910BDB2 A032813 5 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com