Supertex HV9910B Quick Start Manual Download Page 30 | Manualshive

Page: 30 / 53

Supertex HV9910B Quick Start Manual Download Page 30

10

HV9910BDB3

●

1235 Bordeaux Drive, Sunnyvale, CA 94089

●

Tel: 408-222-8888

●

www.supertex.com

Waveforms

(cont.)

(a) PWM Dimming Fall Time

Time Scale

:

10μs/div

PWM Dimming Input

LED Current

(b) PWM Dimming Rise Time

Time Scale

:

10μs/div

PWM Dimming Input

LED Current

(a) PWM Dimming Performance

Time Scale

:

500μs/div

PWM

Dimming

Input

LED Current

Fig.14. PWM Dimming Performance in Constant Frequency Mode

C1 (Yellow)

:

PWMD Input Voltage (2V/div)

C4 (Green)

:

LED Current (200mA/div)

«
...
28
29
30
31
32
...
»

Summary of Contents for HV9910B

Page 1: ...inear regulator which allows it to work from a wide range of input voltages without the need for an external low voltage supply The HV9910B includes a PWM dimming input that can accept an external con...

Page 2: ...0 mA Pin PWMD to GND Ordering Information Device Package Options 8 Lead SOIC 16 Lead SOIC HV9910B HV9910BLG G HV9910BNG G 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 8 7 6 5 1 2 3 4 VIN CS GND GATE RT LD V...

Page 3: ...urrent Sense Comparator VCS TH Current sense pull in threshold voltage 225 250 275 mV 40 C TA 85 C 213 250 287 TA 125 C VOFFSET Offset voltage for LD comparator 12 12 mV TBLANK Current sense blanking...

Page 4: ...aking the LED current almost insensitive to input voltage variations But it leads to variable frequency operation and the frequency range depends greatly on the input and output voltage variation HV99...

Page 5: ...is used to drive an ex ternal FET It is recommended that the GATE charge of the external FET be less than 25nC for switching frequencies 100kHz and less than 15nC for switching frequencies 100kHz Lin...

Page 6: ...ver for an external N channel power MOSFET 5 9 PWMD This is the PWM dimming input of the IC When this pin is pulled to GND the GATE driver is turned off When the pin is pulled high the GATE driver ope...

Page 7: ...E1 e h L L1 L2 1 Dimension mm MIN 1 35 0 10 1 25 0 31 4 80 5 80 3 80 1 27 BSC 0 25 0 40 1 04 REF 0 25 BSC 0O 5O NOM 4 90 6 00 3 90 MAX 1 75 0 25 1 65 0 51 5 00 6 20 4 00 0 50 1 27 8O 15O JEDEC Regist...

Page 8: ...this data sheet may not re ect the most current speci cations For the latest package outline information go to http www supertex com packaging html Doc DSFP HV9910B B061209 16 Lead SOIC Narrow Body P...

Page 9: ...0 1A note zero output current can be obtained only by PWM dimming Connection Diagram HV9910BDB1 Off Line High Brightness 1 4A LED Driver Demo Board WARNING Do not connect earth grounded test instrumen...

Page 10: ...nic isolation on the board care must be taken to prevent damage to the PWM dimming source and or the HV9910BDB1 One simple way is to isolate the LED driver from the AC line using an isolation transfor...

Page 11: ...50Vdc input and full load output LED Current Drain Voltage PWM Dimming at 100Hz LED Current PWMD Voltage Steady State waveforms at 150Vdc input and full load output Input Voltage Input Current Rising...

Page 12: ...4 HV9910BDB1 Supertex inc 1235 Bordeaux Drive Sunnyvale CA 94089 Tel 408 222 8888 www supertex com Conducted EMI Measurements at Full Load and 110V AC input CISPR 15 Limit Silk Screen...

Page 13: ...0 D1 MURS240 Q1 FQD8N25 1 2 1 2 J1 1 2 4 3 L2 R5 1k F1 2A 125V 1 C4 0 1 F 250V 4 MOV1 R ERZ V05D221 1 2 J2 1 J3A 2 3 1 LD 13 PWMD 9 5 CS 4 GATE 8 RT 14 VIN 12 HV9910B U1 C5 0 1 F 250V C1 1 0 F 250V 0...

Page 14: ...EE2D680 4 2 C4 C5 0 1 F 250V metallized polyester X2 capacitor Radial Panasonic ECQ U2A104MV 5 1 C6 2 2 F 16V X7R ceramic chip capacitor SMD0805 6 1 C8 0 1 F 50V X7R ceramic chip capacitor SMD0805 7...

Page 15: ...btained only by PWM dimming The HV9910BDB2 is not CISPR 15 compliant Additional ltering is required to make the board meet CISPR 15 limits Connection Diagram HV9910BDB2 Universal Off Line High Brightn...

Page 16: ...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...

Page 17: ...at 110VAC input and full load output LED Current Drain Voltage Steady State waveforms at 230VAC input and full load output LED Current Drain Voltage Steady State waveforms at 90VAC input and 40V 350mA...

Page 18: ...4 HV9910BDB2 1235 Bordeaux Drive Sunnyvale CA 94089 Tel 408 222 8888 www supertex com Silk Screen...

Page 19: ...0 C4 0 1uF 305VAC 1 2 L1 4 7mH C3 0 47uF 400V R1 464K R6 0 56 C1 22uF 400V D1 STTH2R06U Vin 1 HD 13 EN 9 Gnd 5 CS 4 Gate 8 Rosc 14 Vdd 12 HV9910 U2 1 2 J2 1 2 J1 F1 2A 250VAC R2 178K R7 1K C6 0 1uF C8...

Page 20: ...capacitor Radial EPCOS Inc B32522C6474K 3 1 C4 0 1 F 305VAC EMI suppresion capacitor Radial EPCOS Inc B32922C3104M 4 1 C6 0 1 F 16V X7R ceramic chip capacitor SMD0805 Panasonic ECJ 2VB1C104K 5 1 C7 10...

Page 21: ...cations Parameter Value Input voltage 10 30VDC Output voltage constant frequency mode 2 0 4 5V Output voltage constant off time mode 4 0 8 0V Maximum output current 1 0A 10 Output current ripple typ 2...

Page 22: ...LED string in the constant frequency mode or an 16V LED string in the constant off time mode using the demoboard Although a larger LED string can be driven using the demoboard in these conditions the...

Page 23: ...apacitance at the node At higher switching frequencies the switching losses are higher Conduction losses are dependent on the duty cycle Since the voltage drop on the FET is smaller than the voltage d...

Page 24: ...stant Frequency Mode The HV9910BDB3 is designed to be operated in the constant frequency mode when the load is a single LED In this mode the line regulation of the LED current is less than 2 and full...

Page 25: ...80 Fig 5 Efficiency vs Input Voltage Plot Efficiency vs Input Voltage VO 7 8V 90 91 92 93 94 95 8 12 16 20 24 28 32 Input Voltage V Efficiency Fig 6 Line Regulation of LED Current Plot Line Regulation...

Page 26: ...ff time mode is shown in Figs 9 and 10 Fig 9 Switching Frequency vs Input Voltage Plot Switching Frequency vs Input Voltage VO 7 8V 20 40 60 80 100 120 140 8 12 16 20 24 28 32 Input Voltage V Switchin...

Page 27: ...y mode LED Voltage 3 3V a 10V input Drain Voltage LED Current b 12V input Drain Voltage LED Current c 24V input Drain Voltage LED Current d 30V input Drain Voltage LED Current Fig 11 Steady State Wave...

Page 28: ...Time Scale 10 s div PWM Dimming Input LED Current a PWM Dimming Rise Time Time Scale 10 s div PWM Dimming Input LED Current a PWM Dimming Performance Time Scale 500 s div PWM Dimming Input LED Current...

Page 29: ...me mode LED Voltage 6 4V a 10V input Drain Voltage LED Current b 12V input Drain Voltage LED Current c 24V input Drain Voltage LED Current d 30V input Drain Voltage LED Current Fig 13 Steady State Wav...

Page 30: ...Time Scale 10 s div PWM Dimming Input LED Current b PWM Dimming Rise Time Time Scale 10 s div PWM Dimming Input LED Current a PWM Dimming Performance Time Scale 500 s div PWM Dimming Input LED Current...

Page 31: ...2 3 3 3 J 3 J 1 1 2 2 3 3 4 J 4 J 4 C 2 2uF 50V 4 C 2 2uF 50V 1 2 1 J1 J 3 R k 1 3 R k 1 1 7 5 3 2 4 8 6 1 U 1 U 1 2 2 J2 J 5 R 226k 5 R 226k 2 C 100uF 35V 2 C 100uF 35V 1 C 100uF 35V 1 C 100uF 35V 1...

Page 32: ...y Ref Des Description Package Manufacturer Manufacturer s Part Number 1 2 C1 C2 100 F 35V electrolytic capacitor SMT Panasonic EEV FK1V101P 2 2 C3 C4 2 2 F 50V X7R ceramic chip capacitor SMD1206 Murat...

Page 33: ...g life operation due to the absence of electrolytic capacitors The board is designed to supply a string of LEDs with a current of 350mA and a voltage in the 65 to 105V range from a 220 230VAC line The...

Page 34: ...8 7 5 3 CT1 1 1 C3 10nF D3 STTH1L06A D2 STTH1L06A J2 HDR IC1 HV9910BNG G 1 2 4 3 CL CL 140 C7 100pF 105VDC 350mADC D4 STTH1L06A C2 2 2 F C5 470nF R6 620m R16 620m R4 1 0k R1 464k R12A 499k R12B 499k R...

Page 35: ...0 349 0 35 0 351 0 352 0 353 0 354 0 355 0 356 0 357 0 358 190 210 230 250 270 VAC ILED Harmonic Distortion VO 105V ILED 350mA 0 5 10 15 20 25 30 35 40 190 210 230 250 270 VAC THD Power Factor VO 105V...

Page 36: ...08 222 8888 www supertex com Figure 7 EMI Characterization Conducted Emissions vs CISPR 15 Limits 1 2 4 3 1 2 4 3 TOP VIEW Vertical Toroid Mount Mfr Lodestone Pacific PN VTM455 4 CT1 4T 4T AWG24 Mfr F...

Page 37: ...0V 5 0805 100PF Vishay Vitramon VJ0805A101JXGAT5Z 1 C10 Cap MKP 220NF 305VAC X2 125C 20 EPCOS Inc B32922T2224M 2 C11 C12 Cap MKP 100NF 305VAC X2 125C 20 EPCOS Inc B32922A2104M 1 CL1 Inrush current lim...

Page 38: ...he low sense voltage allows the use of low current sense resistor values HV9910B operates down to 8V input which is required for automobile applications and can take a maximum of 450V input which make...

Page 39: ...n to meet is that the maximum LED string voltage is should be less than half the minimum input voltage to avoid having to implement a special loop compen sation technique For this example the minimum...

Page 40: ...For example a BSP130 SOT 223 package limits the dissipation to less than a Watt at 50 Celsius even if the MOSFET peak current capability is 1 5A A good rule of thumb is to limit overall MOSFET power d...

Page 41: ...d the actual LED current Although this error can be compensated for by changing the sensed resistor appropriately the converter s rejection of the input and output voltage variations will be significa...

Page 42: ...both cases the equation to determine the resistor is given by TOSC s RT k 22 25 For constant frequency operation TOSC is set to the switching time period and for constant off time operation TOSC is se...

Page 43: ...L1 The value of the inductor L1 will depend on the peak to peak ripple desired in the output current Assuming a 30 peak to peak ripple in the output current L1 VO NOM tOFF 4 0 3 IO The peak current ra...

Page 44: ...rights reserved Unauthorized use or reproduction is prohibited Supertex inc 1235 Bordeaux Drive Sunnyvale CA 94089 Tel 408 222 8888 www supertex com 4 AN H50 Typically a FET with about 3 times the cu...

Page 45: ...PK whereas the intent is to regulate the average cur rent IL AVG The difference between the two currents equals one half of the inductor current ripple IL which can be ex pressed by the following equa...

Page 46: ...regulates the average inductor current IL AVG direct ly and accurately within 3 over a wide GATE duty cycle range of at least 0 1 D 0 75 It also includes an auto zero circuit at the CS input that canc...

Page 47: ...support the fixed frequency mode Moreover the RT resistor must be wired to GND in all cases Therefore the HV9961 cannot be used as a direct drop in replacement in the applications of the HV9910B wire...

Page 48: ...ted Supertex inc 1235 Bordeaux Drive Sunnyvale CA 94089 Tel 408 222 8888 www supertex com 4 AN H64 081109 Feature HV9910B HV9961 Fixed Frequency Mode Resistor from RT to GND N A Fixed Off Time Mode Re...

Page 49: ...ch are the target speci cation for this LED driver circuit This LED driver will also meet CISPR 15 EMI limits for general lighting The information in this datasheet also applies to the Supertex HV9910...

Page 50: ...0mW zener diode SOD123 Diodes Inc BZT52C20 7 F 15 1 D9 1 24V precision shunt regulator SOT 23 National Semi LMV431 16 1 F1 2A 250VAC fuse Thru Hole Cooper Bussmann BK PCB 2 17 1 L1 15mH 300uH differen...

Page 51: ...com 2009 All rights reserved Unauthorized use or reproduction is prohibited 1235 Bordeaux Drive Sunnyvale CA 94089 Tel 408 222 8888 www supertex com 3 DN H01 Flyback Transformer Details Component Desc...

Page 52: ...HV9919BDB1 HV9921 Buck 20 400 20 No 3 Lead TO 92 N3 3 Lead SOT 89 N8 HV9921DB1 HV9922 Buck 20 400 50 No 3 Lead TO 92 N3 3 Lead SOT 89 N8 HV9922DB1 HV9922DB2 DN H02 DN H03 HV9923 Buck 20 400 30 No 3 Le...

Page 53: ...d TO 252 K4 3 Lead TO 220 N5 Reverse polarity protection OTP CL7 6 5 90 4 0 90 100 PWM Yes 8 Lead SOIC SG w Heat Slug Reverse polarity protection OTP Switching Converters Device Topology VIN Output Cu...

Reviews:

No comments