Using the TPS92010EVM-631 User's Guide Literature Number: SLUU430C July 2010 – Revised May 2011
User's Guide SLUU430C – July 2010 – Revised May 2011 A 230-VAC TRIAC Dimmable 6-W LED Driver 1 Introduction The TPS92010EVM-631 is a TRIAC dimmable LED driver. It can provide 0.325-A constant current to four or five high-brightness LED’s. The EVM includes a five-LED load. It is powered from the mains which is rated at 185 VRMS to 265 VRMS. The output current can be modified for constant levels from 0.2 A to 0.7 A.
Schematic www.ti.com 4 Schematic Figure 1.
Test Setup www.ti.com Figure 2. LED Board Schematic 5 Test Setup 5.1 Test Equipment Voltage Source: 185-VRMS to 265-VRMS AC source. Multimeters: Voltmeter for up to 20 VDC and an ammeter for up to 1 A Output Load: Load provided or LED load that sinks 0.
Test Setup www.ti.com 5.2 Configuring the Output Current The TPS92010EVM-631 can be configured for different output current levels. Soldering of 0402 parts is required to do this. Table 2 below shows the resistor values necessary for various current levels. Figure 3 shows the location of these resistors on the top side of the PSU board. Table 2.
Test Setup 5.3 www.ti.com Recommended Test Setup 185V to 265V AC Source V + TEXAS I NSTRUMENTS ligh ing A Figure 4. Recommended Test Set Up Using Internal Load 185V to 265V AC Source V + TEXAS I NSTRUMENTS ligh ing A + Constant Voltage Load 14Vdc - 17Vdc Figure 5.
Test Procedure www.ti.com 6 Test Procedure CAUTION CAUTION: High voltages exist on this EVM. Please handle with care. Do not touch EVM when powered. This EVM allows the user to use one of two different set ups. 1. Internal Load: The EVM provides five on-board LED’s. To use these a short or ammeter must be connected between pins 2 and 3 of J4, see Figure 4 above 2. External Load: If the user wants to validate the EVM with their own load pins 1 and 2 of J4 should be used.
Test Procedure 6.2 www.ti.com Verifying Dimming Function 1. 2. 3. 4. 5. 6. 7. Set up the EVM per Figure 4 or Figure 5. Add TRIAC dimmer to the input per Figure 6. Set AC source to 230 VRMS. Set TRIAC to maximum output. Measure output current. Slowly increase TRIAC dimming to minimum output. Observe output current reduces. 185V to 265V AC Source TRIAC Dimmer ligh ing Recommended Dimmers Brand Gamma Merten Wintop Jung Tradim Drespa Siemens Bush Japan Industrial Co.
Performance Data and Typical Characteristic Curves www.ti.com 7 Performance Data and Typical Characteristic Curves Figure 7 through Figure 10 present typical performance curves for TPS92010EVM-631. 7.1 Efficiency EFFICIENCY vs INPUT VOLTAGE 100 95 90 Efficiency - % 85 80 75 70 65 60 55 50 185 195 215 225 235 205 V IN - Input Voltage - V 245 255 265 255 265 RMS Figure 7. Efficiency 7.
Performance Data and Typical Characteristic Curves 7.3 www.ti.com Dimmer Performance EFFICIENCY vs INPUT VOLTAGE 250 300 LED Current - mA 250 200 150 100 50 0 0 15 30 45 60 75 90 105 120 135 150 165 180 Phase Trigger Angle -° Figure 9. Output Current Versus Dimmer Phase Angle 7.4 Output Current Ripple 200mA/div Figure 10. Output Current Ripple with Dimmer at 0% Dim, (10 µs/div.
EVM Assembly Drawing and PCB layout www.ti.com 8 EVM Assembly Drawing and PCB layout The following figures (Figure 11 through Figure 14) show the design of the TPS92010EVM-631 printed circuit board. Figure 11. PSU Top Layer Assembly Drawing (top view) Figure 12.
EVM Assembly Drawing and PCB layout www.ti.com Figure 13. PSU Bottom Assembly Drawing (bottom view) Figure 14.
List of Materials www.ti.com 9 List of Materials The EVM components list according to the schematic shown in Figure 1 Table 3. The EVM Components List QTY REFDES DESCRIPTION MFR PART NUMBER 3 C1, C6, C13 Capacitor, ceramic, 1 µF, 180 V, X7R, 10%, 1210 Std Std 1 C10 Capacitor, ceramic, 22 nF, 180 V, X7R, 10%, 0805 Std Std 3 C11, C14, C15 Capacitor, ceramic, 0.
List of Materials www.ti.com Table 3. The EVM Components List (continued) QTY REFDES DESCRIPTION MFR PART NUMBER 1 R1 Resistor, chip, 560 kΩ, 1/16 W, 1%, 0402 Std Std 1 R10 Resistor, chip, 560, 1/16 W, 1%, 0402 Std Std 1 R12 Resistor, chip, 1.0 kΩ, 1/16 W, 5%, 0402 Std Std 1 R13 Resistor, chip, 33.0 kΩ, 1/16 W, 1%, 0402 Std Std 2 R14, R117 Resistor, chip, 4.70 kΩ, 1/16 W, 1%, 0402 Std Std 1 R15 Resistor, chip, 1.50 kΩ, 1/16 W, 1%, 0402 Std Std 1 R16 Resistor, chip, 4.
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