UCC28880EVM-615

Using the UCC28880EVM-615 User's Guide Literature Number: SLUUB57 July 2014 User's Guide SLUUB57 – July 2014 UCC28880EVM-615 Low-Side Buck Evaluation Module 1 Introduction The UCC28880EVM-615 evaluation module is an AC-to-DC buck or buck-boost type power supply with direct level shifted feedback. The input accepts a voltage range of 85 VAC to 265 VAC. The pre-set output voltage is set to ~12.5 V (typical). The output voltage is referenced to the positive DC input (HVDC node), not to the RTN node. In buck configuration the DC output voltage on P2 is negative with respect to HVDC, and in buck-boost configuration the DC output voltage on P2 is positive with respect to HVDC. The evaluation module uses the UCC28880 low quiescent current switcher ic. This devices integrates a 700V FET and controller into one SOIC7 package. The device also features a high voltage current source, enabling start-up and operation directly from the rectified mains voltage. The low quiescent current of the device enables very high efficiency in non-isolated high-side buck low power converters. Additional features are low standby power and a minimum number of external components. The PWM signal generation is based on a maximum constant ON time concept and each ON pulse is followed by a minimum OFF time to ensure the power MOSFET is not continuously driven in the ON state. The PWM signal is AND gated with the signal from a current limiter. The AND gated signal controls the power MOSFET through a driver. No internal clock is required, and the switching of the power MOSFET is load dependent. The device is also protected from failure conditions with thermal shutdown, under-voltage lockout, soft-start and overload protection. 2 Applications The UCC28880 is suited for use in non-isolated off-line systems requiring high efficiency and advanced fault protection features. Typical applications include: • Home Appliances • White Goods • E Metering • Home Automation • Infrastructure • LED Lighting 2 UCC28880EVM-615 Low-Side Buck Evaluation Module Copyright © 2014, Texas Instruments Incorporated SLUUB57 – July 2014 Submit Documentation Feedback Features www.ti.com 3 Features The UCC28880EVM-615 features include: • Preset Output Voltage of ~ 12.5 V or -12.5 V (relative to the high-voltage input) • 0-mA to 100-mA Load Range • Universal Off-Line Input Voltage Range • Meets EN55022 Class B Conducted Emissions Requirements • Overload and Output Short Circuit Protection • Thermal Shutdown • Controlled Start Up and Restart After Fault Protection CAUTION High voltage levels are present on the evaluation module whenever it is energized. Proper precautions must be taken when working with the EVM. The large bulk capacitors, C1 and C2 must be completely discharged before the EVM can be handled. Serious injury can occur if proper safety precautions are not followed. SLUUB57 – July 2014 Submit Documentation Feedback UCC28880EVM-615 Low-Side Buck Evaluation Module Copyright © 2014, Texas Instruments Incorporated 3 Electrical Specifications 4 www.ti.com Electrical Specifications Table 1. UCC28880EVM-615 Electrical Specifications PARAMETER CONDITIONS MIN TYP MAX UNITS Input Characteristics VIN Input voltage fLINE Frequency IIN No-load power VIN = 115 V/230 V, IOUT = 0 A Input current VIN = 85 V, IOUT = 100 mA 85 115/230 265 47 50/60 64 V Hz 13/31 mW 50 mA Output Characteristics VOUT1 (1) VOUT2 Output voltage (2) VIN = 85 V to 265 V, IOUT = 0 mA to 100 mA 12 12.5 13 VIN = 85 V to 265V, IOUT = 0 mA to 100 mA –12 –12.5 -13 IOUT Maximum output current VIN = 85V to 265V IOUT Output current range VIN = 85V to 265V VOUT(ripple Output voltage ripple 100 0 V V mA 100 mA VIN = 85V to 265V, IOUT = 0 mA to 100 mA 150 mVpp VIN = 85V to 265V 1.25 W ) POUT Output power System Characteristics h Maximum efficiency VIN = 115V/230V, IOUT = 100 mA TOP Operating temperature range VIN = 85V to 265V, IOUT = 0 mA to 100 mA 81%/83% 0 25 40 °C Environmental Conducted EMI Meets CISPR22B/EN55022B Mechanical Characteristics W L H (1) (2) 4 Dimensions Width Length Component height 3.5 in 5 in 0.75 in Jumper J1 inserted in Buck Boost position. Jumper J1 inserted in Buck position. UCC28880EVM-615 Low-Side Buck Evaluation Module Copyright © 2014, Texas Instruments Incorporated SLUUB57 – July 2014 Submit Documentation Feedback 85-265VAC 1A SLUUB57 – July 2014 Submit Documentation Feedback 1 2 8.2 3W 1N4007 1000V 1N4007 1000V D2 D1 1mH C4 4.7µF L1 RTN C2 4.7µF TP2 HVDC RTN TP7 C3 0.1µF VDD HVIN NC VDD HVIN GND_IC GND_IC FB DRAIN UCC28880D TP6 6 4 5 U1 TP4 1 2 3 8 TP1 J1 TP3 2.2mH L2 D3 STTH1R06A 600V R2 301k PIN3 TO PIN2 TP8 C1 47µF R4 51.0k Q1 R3 604k TP5 1 2 12.5V 100mA TP4 TO TP2 +12.5V -12.5V MEASURE VOUT VOUT TP5 TO TP2 282841-2 P2 J1 CONFIGURATION BUCK-BOOST PIN1 TO PIN2 BUCK 5 282841-2 P1 R1 DANGER HIGH VOLTAGE HVDC www.ti.com Schematic Schematic Figure 1. UCC28880EVM-615 Schematic UCC28880EVM-615 Low-Side Buck Evaluation Module Copyright © 2014, Texas Instruments Incorporated 5 Circuit Description 6 www.ti.com Circuit Description The UCC2888EVM-615 is a non-isolated AC-to-DC buck or buck-boost power supply with direct feedback. The pre-set output voltage is set to ~12.5 V. In the buck configuration the output voltage is negative with respect to the high-voltage rectified DC (HVDC) and in the buck-boost configuration the output voltage is positive with respect to HVDC. The user can select between buck or buck-boost configurations by the position of jumper J1. In • • • • • • • • addition to the UCC28880, the UCC2888EVM-615 contains the following key sections: A Half-Wave Rectifier (D1, D2) EMI Filter (L1, C4, C5) Freewheeling Diode (D4) Inductor (L2) Load Capacitor (C6) and Pre-Load Resistor (R2) Feedback Path (R3, Q1, R4) VAC Input Connector (P1) VDC Output Connector (P2) There is one jumper on the board, J1, and the configuration is shown in Table 2. Table 2. UCC28880EVM-615 Board Jumpers DESIGNATOR DESCRIPTION NOTE J1 Selects either buck or buck-boost mode of operation. Output is measured from pin 2 to pin 1 of P2. Table 3. UCC28880EVM-615 Test Points DESIGNATOR DESCRIPTION TP1 UCC28880 Switch Node TP2 High Voltage Rectified DC TP3, TP6, TP8 GND TP4 HVIN (pin 5) of UCC28880 TP5 Negative node of VOUT TP7 VDD (pin 4) of UCC28880 Table 4. UCC28880EVM-615 Board Connectors CONNECTO R P1 P2 6 PIN NUMBER DESCRIPTION L (pin1) AC mains terminal input (line). AC mains input can be connected in either polarity. If DC is fed into this connector, then connect the positive VDC to this node. Warning: This is a high-voltage node. N (pin2) AC main terminal input (neutral). AC mains input can be connected in either polarity. If DC is fed into this connector, then connect negative VDC to this node. Warning: This is a high-voltage node. OUT (12.5V) (pin1) Positive output node. GND (pin2) Negative output node. UCC28880EVM-615 Low-Side Buck Evaluation Module Copyright © 2014, Texas Instruments Incorporated SLUUB57 – July 2014 Submit Documentation Feedback EVM Test Set Up www.ti.com 7 EVM Test Set Up WARNING High voltages that may cause injury exist on this evaluation module (EVM). Please ensure all safety procedures are followed when working on this EVM. Never leave a powered EVM unattended. Figure 2 shows the basic test setup recommended to evaluate the UCC28880EVM-615. Applying a low DC voltage (~15 V to 20 V) into the AC input (P1). The output voltage regulates to ~12.5 V on P2 (pin 1 with respect to pin 2). Once the correct output level is obtained, increase the input voltage to desired level. A1 V1/A1 A2 V1 AC 125 ? V2 PM1 Figure 2. UCC28880EVM-615 Test Set Up SLUUB57 – July 2014 Submit Documentation Feedback UCC28880EVM-615 Low-Side Buck Evaluation Module Copyright © 2014, Texas Instruments Incorporated 7 Test Equipment 8 www.ti.com Test Equipment AC Input Source: The input source shall be an isolated variable AC source capable of supplying between 85 VRMS and 265 VRMS at no less than 5 W and connected as shown in Figure 2. For accurate efficiency calculations, a power meter (PM1) should be inserted between the AC source and the EVM. For highest accuracy, connect the voltage terminals of the power meter directly across the power source. (Connecting the voltage terminals directly to the EVM will result in a small current error. This is very significant when measuring no-load power) Load: The UCC28880EVM-615 is capable of delivering 100 mA of output current. A load resistance of 125 Ω is used on the output. Alternatively an electronic load may be used. NOTE: The output is not isolated from the AC source and the electronic load must be capable of operating from a high-voltage input with a non-isolated source. Power Meter: The power analyzer (PM1) shall be capable of measuring low-input current, typically less than 100 µA, and a long averaging mode if low-power standby mode's input-power measurements are to be taken. An example of such an analyzer is the Yokogawa WT210 Digital Power Meter. Multimeters: Two digital multimeters are used to measure the regulated output voltage (V1) and load current (A1). Oscilloscope: A digital or analog oscilloscope with a 500-MHz scope probe is recommended. Recommended Wire Gauge: A minimum of AWG 24 wire is recommended. The wire connections between the AC source and the EVM, and the wire connections between the EVM and the load should be less than two feet long. 8 UCC28880EVM-615 Low-Side Buck Evaluation Module Copyright © 2014, Texas Instruments Incorporated SLUUB57 – July 2014 Submit Documentation Feedback Performance Data and Typical Characteristic Curves www.ti.com 9 Performance Data and Typical Characteristic Curves 9.1 Typical Efficiency and Load Regulation 9.1.1 12.5-V Buck Table 5. 115-VAC Regulation and Efficiency 12.5-V Buck VO IO PIN 12.78 0 12.51 EFFICIENCY 0.0 12.77 8 164 62.3 12.76 21 314 85.3 12.76 31 467 84.7 12.75 40 619 82.4 12.74 51 781 83.2 12.74 59 909 82.7 12.73 70 1077 82.7 12.73 80 1246 81.7 12.72 91 1414 81.9 12.71 99 1539 81.8 Table 6. 230-VAC Regulation and Efficiency 12.5-V Buck VO IO PIN 12.75 0 30.8 0.0 12.75 9 176 65.2 12.75 21 325 82.4 12.74 31 475 83.1 12.74 40 625 81.5 12.73 51 785 82.7 12.72 59 909 82.6 12.72 69 1075 81.6 12.71 80 1242 81.9 12.71 92 1407 83.1 12.7 100 1528 83.1 100.0 90.0 80.0 70.0 60.0 50.0 40.0 12.9 12.8 12.7 12.6 12.5 115Vac 12.4 230Vac 12.3 EFFICIENCY 115Vac 230Vac 30.0 20.0 10.0 0.0 12.2 12.1 12 0 20 40 60 80 100 120 Figure 3. Load Regulation 12.5-V Buck SLUUB57 – July 2014 Submit Documentation Feedback 0 20 40 60 80 100 120 Figure 4. Efficiency 12.5-V Buck UCC28880EVM-615 Low-Side Buck Evaluation Module Copyright © 2014, Texas Instruments Incorporated 9 Performance Data and Typical Characteristic Curves 9.1.2 www.ti.com 12.5-V Buck Boost Table 7. 115-VAC Regulation and Efficiency 12.5-V Buck Boost VO IO PIN EFFICIENCY 12.76 0 12.78 0.0 12.76 8 166 61.5 12.76 21 320 83.7 12.75 31 474 83.4 12.74 41 628 83.2 12.74 48 750 81.5 12.73 60 920 83.0 12.72 69 1092 80.4 12.72 80 1262 80.6 12.71 91 1432 80.8 12.7 99 1557 80.8 Table 8. 230-VAC Regulation and Efficiency 12.5-V Buck Boost VO IO PIN EFFICIENCY 12.76 0 24.37 0.0 12.75 9 176 65.2 12.74 21 327 81.8 12.73 29 442 83.5 12.73 39 592 83.9 12.72 49 750 83.1 12.71 59 917 81.8 12.71 70 1085 82.0 12.7 78 1212 81.7 12.7 89 1376 82.1 12.7 99 1544 81.4 90.0 13 80.0 12.5 70.0 60.0 12 50.0 11.5 11 115Vac 115Vac 40.0 230Vac 30.0 230Vac 20.0 10.5 10.0 0.0 10 0 20 40 60 80 100 120 Figure 5. Regulation 12.5-V Buck Boost 10 0 20 40 60 80 100 120 Figure 6. Efficiency 12.5-V Buck Boost UCC28880EVM-615 Low-Side Buck Evaluation Module Copyright © 2014, Texas Instruments Incorporated SLUUB57 – July 2014 Submit Documentation Feedback Performance Data and Typical Characteristic Curves www.ti.com 9.2 Output Ripple Figure 7. 100-mA Load Ripple SLUUB57 – July 2014 Submit Documentation Feedback Figure 8. No-Load Ripple UCC28880EVM-615 Low-Side Buck Evaluation Module Copyright © 2014, Texas Instruments Incorporated 11 EVM Assembly Drawing and Layout 10 www.ti.com EVM Assembly Drawing and Layout Figure 9 and Figure 10 show the design of the UCC28880EVM-615 printed circuit board. Figure 9. UCC28880EVM-615 (top view) Figure 10. UCC28880EVM-615 Layout (top layer) 12 UCC28880EVM-615 Low-Side Buck Evaluation Module Copyright © 2014, Texas Instruments Incorporated SLUUB57 – July 2014 Submit Documentation Feedback List of Materials www.ti.com 11 List of Materials Table 9. UCC28880EVM-615 List of Materials QTY DES DESCRIPTION MANUFACTURER PART NUMBER 1 C1 Capacitor, aluminum, 47 µF, 25 V, ±20%, 0.3 Ω, TH Panasonic EEU-FM1E470 2 C2, C4 Capacitor, aluminum, 4.7 µF, 450 V, ±20%, TH Kemet ESH475M400AH2AA 1 C3 Capacitor, ceramic, 0.1 µF, 50 V, ±20%, X7R, 1206 AVX 12065C104MAT2A 2 D1, D2 Diode, P-N, 1000 V, 1 A, TH Fairchild Semiconductor 1N4007 1 D3 Diode, ultrafast, 600 V, 1 A, SMA ST Microelectronics STTH1R06A 4 H1, H2, H3, H4 Bumpon, hemisphere, 0.44 x 0.20, clear 3M SJ-5303 (CLEAR) 1 J1 Header, TH, 100 mil, 3 x 1, gold plated, 230 mil above insulator Samtec TSW-103-07-G-S 1 L1 Inductor, wirewound, ferrite, 1 mH, 0.2 A, 2.3 Ω, TH Bourns 5800-102-RC 1 L2 Inductor, Wirewound, 2.2 mH, 0.33 A, 3.2 Ω, TH TDK TSL1112RA222JR33-PF 2 P1, P2 Terminal block, 2 x 1, 5.08 mm, TH TE Connectivity 282841-2 1 Q1 Transistor, PNP, 500 V, 0.15 A, SOT-23 NXP Semiconductor PBHV9050T,215 1 R1 Resistor, 8.2 Ω, 5%, 3 W, fusible, TH Bourns PWR4522AS8R20JA 1 R2 Resistor, 301 kΩ, 1%, 0.063 W, 0603 TE Connectivity 1879339-3 1 R3 Resistor, 604 kΩ, 1%, 0.1 W, 0603 Yageo America RC0603FR-07604KL 1 R4 Resistor, 51.0 kΩ, 1%, 0.1 W, 0603 Yageo America RC0603FR-0751KL 1 SH-JP1 Shunt, 100 mil, flash gold, black Sullins Connector Solutions SPC02SYAN 2 TP1, TP2 Test point, miniature, red, TH Keystone 5000 3 TP3, TP6, Test point, Miniature, Black, TH TP8 Keystone 5001 3 TP4, TP5, Test point, miniature, white, TH TP7 Keystone 5002 1 U1 Texas Instruments UCC28880D SLUUB57 – July 2014 Submit Documentation Feedback Low Quiescent Current Switcher IC for AC-to-DC Power Supplies, D0007A UCC28880EVM-615 Low-Side Buck Evaluation Module Copyright © 2014, Texas Instruments Incorporated 13 ADDITIONAL TERMS AND CONDITIONS, WARNINGS, RESTRICTIONS, AND DISCLAIMERS FOR EVALUATION MODULES Texas Instruments Incorporated (TI) markets, sells, and loans all evaluation boards, kits, and/or modules (EVMs) pursuant to, and user expressly acknowledges, represents, and agrees, and takes sole responsibility and risk with respect to, the following: 1. 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