TN1252 NCP1252 CAT4026 TN1252/D NCP1252B UC384X MURHD560T4G MURA120T3 PQ3811 - Datasheet Archive

 

NCP1252 Boost and CAT4026 LED Driver Board 2010-October-04 TECHNICAL NOTE Disclaimer: ON Semiconductor is providing this

 

TN1252 TN1252 NCP1252 NCP1252 Boost and CAT4026 CAT4026 LED Driver Board 2010-October-04 TECHNICAL NOTE Disclaimer: ON Semiconductor is providing this reference design documentation package "AS IS" and the recipient assumes all risk associated with the use and/or commercialization of this design package. No licenses to ON Semiconductor's or any third party's Intellectual Property is conveyed by the transfer of this documentation. This reference design documentation package is provided only to assist the customers in evaluation and feasibility assessment of the reference design. It is expected that users may make further refinements to meet specific performance goals. INTRODUCTION This document describes the NCP1252 NCP1252 Boost and CAT4026 CAT4026 LED Driver board. This board includes a DC-DC boost converter and a linear driver for driving up to 6 strings of LEDs at 100 mA from a regulated 24 V supply. The LED channel current is regulated using the ON Semiconductor CAT4026 CAT4026 LED controller in conjunction with the NCP1252 NCP1252 PWM controller operating in Continuous Conduction Mode (CCM). The boost stage converts the 24 V into an output voltage of up to 130 V for driving long strings of LEDs. Figure 1 shows a simplified block diagram of the NCP1252 NCP1252 Boost and CAT4026 CAT4026 LED Driver board. BOARD DESCRIPTION The board is configured for driving LED strings at variable currents up to 100 mA maximum. In order to support high supply voltage of the LED anode, each LED string cathode is connected to an external power transistor. The LED current is set independently for each channel by an external resistor connected between the regulated RSET pin (1 V nominal) and ground. A PWM logic input (active high) allows to turn on all 6 channels together. The PWM can be used to control the brightness of the LEDs by using a PWM signal where the duty cycle sets the brightness. A frequency of 300 Hz is recommended to get the best dimming resolution. The analog dimming (ANLG input) is an optional feature that can be left unconnected. The board supports both open cathode-anode and short cathode-anode fault protections which respectively outputs an active-low signal /FLT-OCA and /FLT-SCA when a fault condition occurs. Figure 2 and Figure 3 show pictures of the actual board. To be in line with the requested SLIM design, the board has been designed to be less than 8 mm on top of the PCB (12.5 mm overall). Figure 1. CrM Buck LED Driver Block Diagram © Semiconductor Components Industries, LLC, 2010 September 2010 ­ Rev. A Publication Order Number: TN1252/D TN1252/D TN1252/D TN1252/D Figure 2. NCP1252 NCP1252 Boost and CAT4026 CAT4026 LED Driver Board (Top side) Figure 3. NCP1252 NCP1252 Boost and CAT4026 CAT4026 LED Driver (Bottom side) http://onsemi.com 2 TN1252/D TN1252/D DETAILED OPERATION The board includes a boost converter and an LED driver section. Each section is described below. When the Power MOS turns ON, the supply voltage is applied on the Boost coil and the current ramps up. Boost Converter Operation When the switch turns OFF, the voltage rises up such that current flows to the output cap through rectifier diode. The inductor current ramps down until the Power MOS is switch ON again. If the switch OFF time is long enough, the current may go to zero with complete discharge of the inductor. Most of the LCD conventional Switching Mode Power Supplies (SMPS) provide 24 V for the CCFL backlight. In order to reuse the same existing SMPS and allow for faster design introduction, the new LED backlight can be designed for 24 V supply. If for direct LED backlight, the 24 V could be sufficient to drive limited diodes segments, the higher numbers of LEDs used for Edge solutions requires much higher voltage. The LED string voltage in the backlight application is typically between 100 V and 150 V. Vin Vout - Vin ton = toff L L I = Working with high voltage ratio: 120 / 24 = 5, we have 80% typical on time duty cycle (ton./ ton+ toff). Considering possible lower supply and higher output voltages, ton may go up to 90% which is very critical for the controller, not allowing high switching frequency and decreasing the efficiency. Boost Concept As there is no need of main isolation already provided by the 24 V SMPS, a conventional Boost or Step Up is capable to provide the requested higher voltage. To solve that, the boost is designed with tapped coil allowing for smaller duty cycle despite high voltage ratio. Figure 4. Conventional Boost Solution Schematic Ipeak Ics ISUPPLY Itransistor td Idiode Ivalley ton toff Figure 5. Conventional Boost Current in the Coil http://onsemi.com 3 TN1252/D TN1252/D Tapped coil Boost Concept The coil has an added connection point allowing the solution to work like a transformer but without the drawback of poor coupling. Vin Vout - Vin I = Lp ton = Lp + Ls toff Tapped coil Boost Design Consideration With correct turn's ratio, the boost coil allows to get down to 50% duty cycle despite high boost voltage ratio (Vout / Vin). The larger toff allows a reduction of rms current in both output diode and capacitor. The shorter ton for the Power MOS switch, working with lower inductance, asks for a larger peak and rms current, requesting for low Rds-on to avoid over power dissipation and temperature. ton Np Vout - Vin = toff Np + Ns Vin With Ns = 3.3 Np , for 24 Vin and 120 Vout, we are getting ton toff (about 50% duty cycle). Lp The high secondary inductance Ls will limit the di/dt such that an added diode D2 should be connected from the switch to the output capacitor to avoid overvoltage on the Power MOS. This diode D2 can be small thanks to the very short conduction time. Ls D1 Vin Vout D2 Q Cin Cout Figure 6. Tapped coil Boost Solution Schematic Ics td ISUPPLY Idiode Ivalley ton toff Figure 7. Tapped Coil Boost Current in the Coil http://onsemi.com 4 TN1252/D TN1252/D NCP1252B NCP1252B Controller Power Stage The NCP1252 NCP1252 controller is an improved UC384X UC384X previous solution. With more features and much reduced number of external surrounding parts, it offers everything needed to build cost-effective and reliable switching supplies or Boost converter. To reduce power dissipation, two power MOS transistors (Q1 and Q2) are used in parallel such that Rds-on is reduced by half. For reduced power application, one of the MOS can easily be disconnected to reduce the size of the special low profile heat sink. Thanks to the use of an internally 10 ms fixed timer, NCP1252 NCP1252 detects an output overload without relying on the auxiliary VCC. A Brown-Out input offers protection against low input voltages and improves the converter reliability and safety. The switching frequency is adjustable with an external resistance to provide highest design flexibility. The version B allows up to 80% duty cycle avoiding too short toff or diode conduction time. The Internal 160 ns Leading Edge Blanking avoids possible issues with Continuous Conduction Mode and peak current by switch ON of Power MOS. An external capacitor defines the soft start. The wide range of VCC allows easy supply from the 24 V input voltage with auto-recovery UVLO by 9 V. Despite the output voltage limit to 130 V, 200 V power MOS should be used due to the overvoltage generated by the tapped boost coil construction. Finally a SOIC8 package saves PCB space and represents a solution of choice in cost sensitive project. Additional PNP transistors Q5 and Q6 allow faster Power MOS switch OFF with reduced impedance. The boost diode D1 is an Ultra fast 5 A / 600 V diode MURHD560T4G MURHD560T4G allowing Continuous Conduction Mode with limited switching losses thanks to the low trr. The reversed voltage applied by the tapped coil asks for a voltage much higher than output voltage (classical boost). To reduce peak voltage on the Power MOS switches, an additional diode D2 is added. Thanks to the limited conduction time, a 1 A / 200 V MURA120T3 MURA120T3 is enough. Tapped Boost Coil ICs Supply To allow SLIM design below 8 mm height on top of the PCB, the coil has been design on special bobbin to be inserted within a PCB hole. Designed with PQ3811 PQ3811, the primary inductance of 30 µH is able to support up to 12 A without saturation while the secondary inductance with 270 µH allows to work with 50% duty cycle. Despite the NCP1252 NCP1252 could be directly supplied from the 24 V, we use 1 K serial resistance (R1 + R1-1) and 15 V zener ZD1 to avoid too high VCC, reducing the power dissipation in the controller and avoiding Over Voltage transients issues (VCC should not exceeds 28 V). The 65 kHz switching frequency provides a good compromise between switching looses, efficiency and boost coil size. The CAT4026 CAT4026 is supplied through a 5 V linear regulator IC2/MC78M05CDTG IC2/MC78M05CDTG (up to 35 V input capable) connected directly to the 24 V input voltage. Thanks to the limited current consumption, the regulator is in a DPAK without power dissipation issues. An additional diode D3 is connected from VCC to the output voltage avoiding NCP1252 NCP1252 to start with output short circuit to GND. To avoid safety issues if the 24 V power supply is not capable to detect this short circuit, the added fuse F1, in series with the output, will open-up and so disconnect the output from the 24 V supply. Electrolytic Capacitors To allow low profile design, all electrolytic capacitors are 10 mm diameter type, solder flat on the board with open holes allowing the parts to be partially below the PCB. The high RMS currents require using multiple capacitors in parallel for both the input and output of boost converter. http://onsemi.com 5 TN1252/D TN1252/D Boost Oscillograms Brown Out: Vstart = 21.1 V & Vstop= 19.4 V Figure 8. Boost Coil Current Waveform For Vin = 24 V ­ 10%, Vout = 125 V, Pout = 73 W Power MOS Q1 & Q2 Drain Voltage 50 V/div VDrain Max = 171 V Boost coil input current 5 A/div IcoilMax = 8.1 A 5 µs/div 62.2 kHz Figure 9. Boost Coil Current Waveform For Vin = 24 V + 10%, Vout = 125 V, Pout = 73 W Power MOS Q1 & Q2 Drain Voltage 50 V/div VDrain Max = 170 V Boost coil input current 5 A/div IcoilMax = 7.5 A 5 µs/div 63.7 kHz Figure 10. Boost Coil Current Waveform For Vin = 24 V - 10%, Vout = 125 V, Pout = 10 W Power MOS Q1 & Q2 Drain Voltage 50 V/div VDrain Max = 141 V Boost coil input current 5 A/div IcoilMax = 3.5 A 5 µs/div 66.7 kHz http://onsemi.com 6 TN1252/D TN1252/D Figure 11. Boost Coil Current Waveform For Vin = 24 V + 10%, Vout = 125 V, Pout = 10 W Power MOS Q1 & Q2 Drain Voltage 50 V/div VDrain Max = 141 V Boost coil input current 5 A/div IcoilMax = 3 A 5 µs/div 62.3 kHz Figure 12. Boost Diode D1 Current Waveform For Vin = 24 V + 10%, Vout = 125 V, Pout = 73 W Boost diode D1 reversed Voltage 100 V/div VDiodeMax = 340 V Boost diode D1 current 1 A/div IDiodeMax = 2.6 A 5 µs/div 63.5 kHz Figure 13. Boost Diode D1 Switch OFF Waveform Expend of Figure 12 For Vin = 24 V + 10%, Vout = 125 V, Pout = 73 W Boost diode D1 reversed Voltage 100 V/div VdiodeMax = 340 V Boost diode D1 current 1 A/div IDiodeMax = 2.6 A 100 ns/div 63.5 kHz http://onsemi.com 7 TN1252/D TN1252/D Figure 14. Boost Diode D1 Switch ON Expend of Figure 12 For Vin = 24 V + 10%, Vout = 125 V, Pout = 73 W Boost diode D1 reversed Voltage 100 V/div VdiodeMax = 165 V Boost diode D1 current 1 A/div IDiodeMax = 2.6 A 100 ns/div 63.5 kHz Figure 15. Current in the Boost Diode D1 For Vin = 24 V + 10%, Vout = 125 V, Pout = 10 W Boost diode D1 reversed Voltage 100 V/div VDiodeMax = 309 V Boost diode D1 current 1 A/div IDiodeMax = 0.92 A 5 µs/div 63 kHz Figure 16. Current in the Tapped Boost Diode D2 For Vin = 24 V + 10%, Vout = 125 V, Pout = 73 W Tapped Boost diode D2 reversed Voltage 100 V/div VDiodeMax = 203 V Boost diode D1 current 5 A/div IDiodeMax = 9.9 A 5 µs/div 63.7 kHz http://onsemi.com 8 TN1252/D TN1252/D Figure 17. Current in the Tapped Boost Diode D2 Expend of Figure 16 For Vin = 24 V + 10%, Vout = 125 V, Pout = 73 W Tapped Boost diode D2 reversed Voltage 100 V/div VDiodeMax = 203 V Boost diode D1 current 5 A/div IDiodeMax = 9.9 A 100 ns/div 63.7 kHz Figure 18. Current in the Boost Coil For Vin = 24 V, Vout = 125 V, Pout = 0 W = No load Power MOS Q1 & Q2 Drain Voltage 50 V/div VDrain Max = 73 V Boost coil input current 0.5 A/div IcoilMax = 0.55 A 5 µs/div 62.2 kHz Boost efficiency For nominal 24 V input and 123 V output, the DC-DC boost efficiency performance is as follows. · · For 10 W load, the efficiency = 100 x Pout / Pin = 100 x (VOUT x IOUT) / (VIN x IIN) = 82.5%. For 73 W load, the efficiency = 87%. LED DRIVER OPERATION The CAT4026 CAT4026 controller regulates the current independently in the 6 LED strings by using external NPN power transistors and monitoring the voltage across the sense resistors tied to ground. Accurate constant current is guaranteed in each string so that the device is ideal for large LCD backlight applications. The controller senses each cathode string voltage and provides an output current feedback (IFB pin) to be interfaced to a DC/DC converter for automatically adjusting the anode voltage to the lowest level and therefore maximizes the power supply efficiency. The CAT4026 CAT4026 also detects shorted LEDs within a string or an open LED string fault condition. Both PWM and analog voltage inputs are available for dimming control. http://onsemi.com 9 TN1252/D TN1252/D LED Current Setting The LED current is set to 100 mA independently in each of the six channels by using 10 resistors connected between the CAT4026 CAT4026 RSET[1-7] pins and ground. For setting the LED current to another value, the following equation can be used to calculate the RSET resistor value. RSET[] = 1V / LED Current [A] The LEDs can be dimmed dynamically by applying a 300 Hz PWM signal to the PWM input. Figure 19 shows the variation of the LED current versus the PWM duty cycle. The PWM input voltage should not exceed 5 V maximum. The PWM logic high threshold is 2.5 V, so to enable the CAT4026 CAT4026 the PWM input should be above 2.5 V. Figure 21. PWM Waveforms 1% Duty Cycle Zoomed LED CURRENT [%] 100 80 60 40 20 0 0 20 40 60 80 DUTY CYCLE [%] 100 Figure 19. LED Current vs. Duty Cycle In Figure 20 to Figure 24, the waveforms can be seen for duty cycles of 1, 50, and 95%. Figure 20. PWM Waveforms 1% Duty Cycle Figure 22. PWM Waveforms 50% Duty Cycle Figure 23. PWM Waveforms 95% Duty Cycle http://onsemi.com 10 TN1252/D TN1252/D To use the ANLG input for analog dimming, an external 1 k resistor is needed to provide current limiting when an SCA fault occurs, otherwise leave the pin unconnected. The LED brightness versus ANLG input pin voltage is shown in Figure 24. Open Cathode-Anode (OCA) Fault Protection The CAT4026 CAT4026 OCA input is used to detect and protect against abnormally high LED Anode condition. An external resistive divider connected between the LED anode and the OCA pin will trigger a fault FLT-OCA condition once the OCA pin voltage exceeds 1.0 V. Any open-LED channel will automatically be disabled and removed from the feedback loop when OCA is triggered. This method provides an auto-recovery feature for the system to resume normal operation by ensuring only the `good' LED channels are included in the feedback loop. A latched OCA fault condition (FLT-OCA active low) will be set on the connector CON31 CON31 pin P2 when the OCA threshold has been reached. Figure 26 shows the operation of the OCA fault occurrence during power-up. Figure 24. LED Brightness vs. ANLG Pin Voltage Normal Operation Figure 25 shows a power-up waveform once the PWM is enabled for a nominal 100V anode voltage VOUT. Figure 26. OCA Fault During Power Up Figure 27 shows the operation of the OCA fault occurrence in live operation. Figure 25. Normal Power Up Fault Protection (open LED, short LED) The board supports two fault detection open-drain output signals /FLT-OCA and /FLT-SCA which are pulled low when a fault condition occurs respectively open-LED or shorted-LED. In normal operation, when the faults are not present, these two signals are pulled high to the 5 V VDD rail. Figure 27. OCA Fault in Live Operation http://onsemi.com 11 TN1252/D TN1252/D Short Cathode-Anode (SCA) Fault Protection The CAT4026 CAT4026 SCA pin is used to detect a severe mismatch in LED string voltage, such as the occurrence of a short between several LEDs (anode to cathode) within one string. The SCA pin is connected to each LED cathode via a diode array and a voltage level translator. The SCA threshold voltage of the detector is set and can be adjusted by using an external Zener diode (ZD31) nominally set to 25 V and a series resistor (R52) 3 k. The SCA trigger voltage is set to about 30V on the board. An unlatched signal will be produced by the FLT-SCA pin. The fault FLT-SCA output is connected to the ANLG pin through a diode and pulls the ANLG pin lower to 0.6 V when the SCA fault is present (FLT-SCA low), thereby limiting the current in each channel to 20 mA. Performance Figure 30 shows the overall efficiency (power in LEDs divided by power in) versus VIN for a 100 V LED string at about 600 mA current. The average efficiency is about 87%. Figure 28 shows the operation of the SCA fault occurrence during power-up. Figure 30. Efficiency versus VIN This board shows very tight voltage and current line regulation with an input voltage variation from 20 V to 28 V of about 0.80% and 0.03% respectively. Feedback Loop Circuit Figure 28. SCA Fault at Power Up Figure 29 shows the operation of the SCA fault occurrence in live operation. This feedback circuit shown in Figure 31 is driven by the CAT4026 CAT4026 IFB pin which is connected to the NCP1252 NCP1252 FB feedback pin via an inverting current amplifier circuit (current mirror). It also contains two 75 V zener diodes (ZD2 and ZD3) in series tied to VOUT to limit the output voltage to about 145 V max in case the CAT4026 CAT4026 IFB becomes disconnected. Figure 31. Feedback Circuit Figure 29. SCA Fault in Live Operation http://onsemi.com 12 TN1252/D TN1252/D TEST PROCEDURE Warning: Due to the high-voltage (up to 150 V) present on the board and on the LED load, the test set-up should be handled with care. Make sure both the short and open cathode-anode fault pins (/FLT-SCA on CN31 P4 and /FLT-OCA on CN31 P2) are pulled high to 5 V VDD. The following steps are needed for the installation of the board together with the power supply and the load. The load consists of LED strings, or an equivalent resistive load, with a voltage drop of around 100 V when biased with a 100 mA current per string (600 mA total). Measure the current in the LED string (or resistive load) with an ammeter, the average current should be around 100 mA. Connect the 24 V DC external supply with a current limit set to 4 A to the board connector CN01 P8 (VIN). Connect the external supply Ground to connector CN01 P1 (Gnd). Connect the PWM input to the connector CN31 P8. The PWM input should never exceed 5 V. Before powering-up the board, an LED load (or equivalent resistive load) should be connected to each of the six LED channels on connector CN30 or connect one load with all channels in parallel. The connector CN04 includes 6 LED cathode pins and 6 anode voltage pins connected together. To use separate strings, connect the cathodes or one side of the 1.2 k resistive loads rated at 25 W to each of the cathode pins CN04 P2, P4, P6, P8, P10, and P12 (LED1-6), and the anode or other side of the resistive loads to CN04 P1, P3, P5, P7, P9, and P11 (VIN). On one string, short 10 LEDs or the equivalent to bring the cathode voltage to about 31 V, and verify that the SCA fault /FLT-SCA pin is pulled low and the LED current is dropped down to around 20 mA per channel. Unshort the load and verify that there once again is 100 mA of current and the SCA fault pin is not pulled to ground. Open the load and verify that the OCA fault /FLT-OCA pin is pulled low and stays low even after reconnecting the load. Using a function generator, set the PWM signal for a 300 Hz frequency, 5 Vpk-pk amplitude, 2.5 V offset, and 50% duty cycle pulse train. Measure the average current through the load which should be around 50 mA. To use one single load string, short CN04 P2, P4, P6, P8, P10, and P12 (LED1-6) together and connect to the cathode or one side of a 200 load rated at 150 W, and connect CN04 P1, P3, P5, P7, P9, and P11 (VIN) to the anode or other end of the resistive load. Set the DC power supply (VIN) to a low 18 V to test the under-voltage lockout (UVLO) functionality. Ensure the LEDs do not turn on, while the PWM input is at 5 V. · Connect the PWM input to GND (logic low). · Turn on the power supply VIN to 18 V. · Set the PWM input to 5 V (logic high). · Make sure the LEDs do not turn on. · Set the PWM to GND and turn off the power supply VIN. · Turn on the power supply VIN to 24 V. · Set the PWM input to 5 V (logic high). http://onsemi.com 13 TN1252/D TN1252/D BOARD SCHEMATIC Figure 32. Board Schematic Part 1 of 2 (DC-DC NCP1252 NCP1252 Boost section) http://onsemi.com 14 TN1252/D TN1252/D Figure 33. Board Schematic Part 2 of 2 (CAT4026 CAT4026 Linear LED Driver section) http://onsemi.com 15 TN1252/D TN1252/D BOARD LIST OF COMPONENTS Table 1. Board List of Components for the NCP1252 NCP1252 Section Name C12 C15, C17 C13, C14 CON1 CON3 D1 D2 D3 D4, D5 D8 D6, D7, D9 F1 Manufacturer Rubycon Chemi-con Rubycon Chemi-con Vishay Roederstein Vishay Kemet Kemet Kemet Rubycon Chemi-con Kemet Kemet Kemet LEAMAX Enterprise LEAMAX Enterprise ON Semiconductor ON Semiconductor ON Semiconductor ON Semiconductor Vishay Dale ON Semiconductor Vishay Heatsink1 Columbia-Staver Aluminum Heatsink Hole 1 ­ Hole 6 IC1 IC2 J1 ­ J10 J50 ­ J64 L1 L2 Q1, Q2 Q3, Q4 Q5, Q6 Q7 R16 R1, R1-1 R2 R3, R17 R4, R4-1 R5 R6 R19 R20 R21 R13 R7, R9 R11, R12 R8, R10 R18 R15 R14 R22 R23, R24 ZD2, ZD3 ZD1 Kang Yang ON Semiconductor ON Semiconductor Vishay Dale Coilcraft TDK STM ON Semiconductor ON Semiconductor ON Semiconductor Vishay Draloric Vishay Draloric Vishay Draloric Vishay Draloric Vishay Draloric Vishay Dale Vishay Draloric Vishay Draloric Vishay Draloric Vishay Draloric Vishay Draloric Vishay Draloric Welwyn Vishay Draloric Vishay Draloric Vishay Draloric Vishay Draloric Vishay Draloric ON Semiconductor ON Semiconductor Ground Lugs Current Mode PWM Controller 500mA, 5V Voltage Regulator 5% Wire Jumpers Zero Value Resistor 5% Inductor 2.2uH, 5% Tapped Boost Inductor Power N-MOSFET 20A, 200V NPN General Purpose Transistor PNP General Purpose Transistor PNP General Purpose Transistor Resistor SMD 33, 1% Resistor SMD 2.2k, 1% Resistor SMD 180k, 1% Resistor SMD 100 , 1% Resistor SMD 2.2k , 1% Resistor Through Hole 10k , 1% Resistor SMD10k , 1% Resistor SMD1.2k , 1% Resistor SMD 3.3k , 1% Resistor SMD 4.7k , 1% Resistor SMD 4.7k , 1% Resistor SMD 27 , 1% Resistor Through Hole 0.1 , 5%, 2W Resistor SMD 47k , 1% Resistor SMD 510 , 1% Resistor SMD 68k , 1% Resistor SMD Resistor SMD 1k , 1% Resistor SMD 10k , 1% 68V Zener Diode 500mW 5% 15V Zener Diode 500mW 5% C1, C2, C3 C4, C5, C6 C7 C8 C9 C18 C11 C10, C16 Description Electrolytic Capacitor 560uF, 35V, 20% Electrolytic Capacitor 100uF, 200V, 20% Ceramic Capacitor 10nF, 400V, 5% Ceramic Capacitor 1nF, 400V, 10% Ceramic Capacitor 1nF, 50V, 10% Ceramic Capacitor 47nF, 50V, 10% Ceramic Capacitor 10nF, 50V, 10% Electrolytic Capacitor 10uF, 50V, 20% Ceramic Capacitor 220pF, 50V Ceramic Capacitor 100nF, 50V, 10% Ceramic Capacitor 470nF, 50V, 10% Connector Connector 5A, 600V MEGAHERTZTM Ultrafast Rectifier Ultrafast Power Rectifier Switching Diode, 250V Switching Diode, 100V Zero Value Resistor 5% Switching Diode, 100V Fuse Resistor 0.22 , 0.5W http://onsemi.com 16 Part Number ZL 35V 560uF 10x25 EKZE 35V 560 µF 10 x 25 TXW 200V 100uF 10x40 EKXJ 200V 120 µF 10 x 40 MKP18040310404M MKP18040310404M BFC237051102 BFC237051102 C0805C102K5RACTU C0805C102K5RACTU C0805C473K5RAC C0805C473K5RAC C0805C103K5RACTU C0805C103K5RACTU 50MS510M6357 50MS510M6357 EKMG500ELL100ME11D EKMG500ELL100ME11D C0805C221K5RACTU C0805C221K5RACTU C0805C104K5RACTU C0805C104K5RACTU C0805C474K5RACTU C0805C474K5RACTU 4324-08R 4324-08R 4324-03R 4324-03R MURHD560T4G MURHD560T4G MURA120T3 MURA120T3 MMSD103T1G MMSD103T1G MMSD4148T1G MMSD4148T1G CRCW12060000Z0EA CRCW12060000Z0EA MMSD4148T1G MMSD4148T1G NFR25H0002207JA100 NFR25H0002207JA100 TP209ST TP209ST, 80.0, 7.0, NA,-, 02B GND-15 GND-15 NCP1252BDR2G NCP1252BDR2G MC78M05CDTG MC78M05CDTG CRCW12060000Z0EA CRCW12060000Z0EA RFB0807-2R2L RFB0807-2R2L PFC3811QM-691K PFC3811QM-691K STF19NF20 STF19NF20 BC848ALT1G BC848ALT1G BC808-25LT1G BC808-25LT1G BC858ALT1G BC858ALT1G CRCW0805133RFKEA CRCW0805133RFKEA CRCW08052K20FKEA CRCW08052K20FKEA CRCW0805180KFKEA CRCW0805180KFKEA CRCW0805100RFKEA CRCW0805100RFKEA CRCW08052K20FKEA CRCW08052K20FKEA CCF5510K0FKE36 CCF5510K0FKE36 CRCW080510K0FKEA CRCW080510K0FKEA CRCW120611K2FKEA CRCW120611K2FKEA CRCW080513K3FKEA CRCW080513K3FKEA CRCW080514K7FKEA CRCW080514K7FKEA CRCW120614K7FKEA CRCW120614K7FKEA CRCW0805127RFKEA CRCW0805127RFKEA WP2S-R1A25 WP2S-R1A25 CRCW0805147KFKEA CRCW0805147KFKEA CRCW0805510RFKEA CRCW0805510RFKEA CRCW080568K0FKEA CRCW080568K0FKEA RC1206FR-071KL RC1206FR-071KL CRCW080510K0FKEA CRCW080510K0FKEA MMSZ5266BT1G MMSZ5266BT1G MMSZ5245BT1G MMSZ5245BT1G Units 3 3 0/NA 1 1 1 1 2 1 2 2 1 0/NA 1 1 1 2 1 0/NA 1 1 6 1 1 10 15 1 1 2 2 2 0/NA 1 2 1 2 0/NA 1 1 1 1 0/NA 1 2 2 2 1 1 0/NA 0/NA 0/NA 2 1 TN1252/D TN1252/D Table 2. Board List of Components for the CAT4026 CAT4026 Section Name C30 Manufacturer MULTICOMP Description Ceramic Capacitor 1nF, 50V, 10% Part Number MCCA000350 MCCA000350 Units 0/NA C31 YAGEO Ceramic Capacitor 1nF, 200V, 10% CC1206KRX7RABB102 CC1206KRX7RABB102 1 C32 KEMET Ceramic Capacitor 1uF, 10V, 10% C0805C105K8RACTU C0805C105K8RACTU 1 C33 MULTICOMP Ceramic Capacitor 100nF, 16V, 10% MCCA000274 MCCA000274 1 C34 MULTICOMP Ceramic Capacitor 100pF, 50V, 10% MCCA000330 MCCA000330 1 C35 MULTICOMP Ceramic Capacitor 10nF, 50V, 10% MCCA000368 MCCA000368 0/NA C36 MULTICOMP Ceramic Capacitor 100nF, 16V, 10% MCCA000274 MCCA000274 0/NA CON30 CON30 LEAMAX Enterprise Connector 4324-12R 4324-12R 1 CON31 CON31 LEAMAX Enterprise Connector 4324-08R 4324-08R 1 CON32 CON32 LEAMAX Enterprise Connector 4324-07R 4324-07R 0/NA D30 ­ D37 ON Semiconductor Switching Diode, 250V BAS21LT1G BAS21LT1G 8 D38 ON Semiconductor Switching Diode, 100V MMSD4148T1G MMSD4148T1G 1 ZD31 ON Semiconductor 25V Zener Diode, 500mW 5% MMSZ5253BT1G MMSZ5253BT1G 1 ZD30 ON Semiconductor 15V Zener Diode, 500mW 5% MSZ5245BT1G MSZ5245BT1G Heatsink 30 Columbia-Staver Aluminum Heatsink TP209ST TP209ST,120,7.0,NA,-,02B 1 IC30 ON Semiconductor 6-Channel LED Controller CAT4026V-T1 CAT4026V-T1 1 IC31 ON Semiconductor Low Input Bias Current, 1.8V OpAmp LMV301SQ3T2G LMV301SQ3T2G 0/NA 0/NA J11 ­ J37 - Wire Jumpers - 27 J100 ­ J135 Vishay Dale Zero Value Resistors 1% CRCW12060000Z0EA CRCW12060000Z0EA 36 Q30A ­ Q35A ON Semiconductor High Voltage Power Transistors NPN MJD340G MJD340G 6 Q30 ­ Q35 ON Semiconductor Bipolar Power NPN MJF47G MJF47G 6 Q36 ON Semiconductor NPN General Purpose Transistor BC848ALT1G BC848ALT1G 0/NA Q37 ON Semiconductor General Purpose High Voltage Transistor NPN MSD42WT1G MSD42WT1G 0/NA Q38 ON Semiconductor General Purpose High Voltage Transistor NPN MSD42WT1G MSD42WT1G R36 Vishay Draloric Resistor SMD 18k , 1% CRCW080518K0FKEA CRCW080518K0FKEA R46 Vishay Draloric Resistor SMD 10k , 1% CRCW080510K0FKEA CRCW080510K0FKEA 1 R37, R44, R45 Vishay Draloric Resistor SMD 47k , 1% CRCW0805147KFKEA CRCW0805147KFKEA 0/NA R90, R53 Vishay Draloric Resistor SMD 5.1k , 1% CRCW080510K0FKEA CRCW080510K0FKEA 2 R49 Vishay Draloric Resistor SMD 0 , 1% CRCW08050000Z0EA CRCW08050000Z0EA 0/NA R50, R60 ­ R65 Vishay Draloric Resistor SMD 0 , 1% CRCW08050000Z0EA CRCW08050000Z0EA 7 R43 Vishay Draloric Resistor SMD 47k , 1% CRCW0805147KFKEA CRCW0805147KFKEA 1 R41 R30 ­ R35, R54 R59, R48 R39, R40 Vishay Draloric Resistor SMD 1k , 1% CRCW08051K00FKEA CRCW08051K00FKEA 0/NA Vishay Draloric Resistor SMD 1k , 1% CRCW08051K00FKEA CRCW08051K00FKEA 16 1 0/NA Vishay Draloric Resistor SMD 100k , 1% CRCW0805100KFKEA CRCW0805100KFKEA 0/NA R38 Vishay Draloric Resistor SMD 1.8k , 1% CRCW08051K80FKEA CRCW08051K80FKEA 0/NA R42 Vishay Draloric Vishay Draloric Resistor SMD 510 , 1% CRCW080510R0FKEA CRCW080510R0FKEA 1 R52 Resistor SMD 3.0k , 1% CRCW08053K00FKEA CRCW08053K00FKEA 1 R47 Vishay Dale Resistor SMD 130k , 1% CRCW1206130KFKEA CRCW1206130KFKEA 1 R51 R66, R67 R70, R71, R74, R75, R78, R79, R82, R83, R86, R87 R68, R69, R72, R73, R76, R77, R80, R81, R84, R85, R88, R89 Vishay Dale Resistor SMD 240k , 1% CRCW0805240KFKEA CRCW0805240KFKEA 1 Vishay Dale Resistor SMD 20 , 1% CRCW080520R0FKEA CRCW080520R0FKEA 12 - - - http://onsemi.com 17 0/NA TN1252/D TN1252/D REVISION HISTORY Date Rev. Description 19-May-10 O Initial Issue 07-Oct-10 A Added NCP1252 NCP1252 Detailed Operation and converted document to ON Semiconductor format. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. "Typical" parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. 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