FEB User Guide FSFR2100 Evaluation Board Test Report Application for LCD TV Power Supply
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1 FEB User Guide FSFR2100 Evaluation Board Test Report Application for LCD TV Power Supply Featured Fairchild Products: FSFR Fairchild Semiconductor Corporation FEB212_003 FSFR2100 Rev
2 Table of Contents 1. Featured Fairchild Products FSFR Power Supply Specification Table Board Schematic Bill of Materials Transformer Specification FSFR2100 (LLC) Printed Circuit Board Test Results Primary-Side MOSFET Voltage and Current Waveforms Secondary-Side Rectifier Diodes Voltage and Current Waveforms On/Off Waveforms Output Voltage Ripple Hold-Up Time Test Protection Operation Waveforms Efficiency Fairchild Semiconductor Corporation 2 FEB212_003 FSFR2100 Rev
3 1. Featured Fairchild Products 1.1. FSFR2100 FSFR2100 is an integrated Pulse-Frequency-Modulation (PFM) controller and MOSFETs especially designed for Zero-Voltage-Switching (ZVS) resonant half-bridge converter topologies. Variable frequency control with 50% duty cycle for half-bridge resonant converter topology High efficiency through zero voltage switching (ZVS) Internal SuperFETs with fast recovery type body diode (t rr =120ns) Fixed dead time (350ns) Up to 300kHz operating frequency Pulse skipping for frequency limit (programmable) at light-load condition Simple remote ON/OFF control Various protection functions: Over-Voltage Protection (OVP), Overload Protection (OLP), Over-Current Protection (OCP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown (TSD) 1.2. Power Supply Specifications 20ms hold-up time for V IN =390V DC Application FPS Device Input Voltage Range Rated Output Power Output Voltage (Rated Current) LCD TV FSFR2100 V IN nominal: 390V DC (340~400V DC) V CC supply: 18V DC 192W 24V-8A Description Min. Typ. Max. Units Input Voltage (V IN) 340V 390V 400V V DC Output Voltage (V OUT) 24V V DC Output Current (I OUT) 0 8 A DC Rated Output Power (P O) 192 W 2007 Fairchild Semiconductor Corporation 3 FEB212_003 FSFR2100 Rev
4 1.3. Board Schematic Figure 1. FSFR2100 Evaluation Board (LCC Resonant Converter) V DL TCS SG LVcc CONR PG HVcc V CTR Figure 2. FSFR2100 Package Diagram (9-SIP) 2007 Fairchild Semiconductor Corporation 4 FEB212_003 FSFR2100 Rev
5 1.4. Bill of Materials Item Number Part Reference Value Note Digi-Key Manufacturer 1 C µF/450V DC Electrolytic Samyoung Electronics 2 C102 22nF/630V Film Samwha Electronics 3 C pF Ceramic Samwha Electronics 4 C104 Open 5 C µF/50V Electrolytic Samyoung Electronics 6 C nF Film Samwha Electronics 7 C107 10µF/50V Electrolytic Samyoung Electronics 8 C108 12nF Film Samwha Electronics 9 C109 22µF/50V Electrolytic Samyoung Electronics 10 C110, C nF/275V AC Interference Suppression Film Pilkor Electronics 11 C pF Ceramic Samwha Electronics 12 C201, C µF/35V Electrolytic Samyoung Electronics 13 C203 47nF Film Samwha Electronics 14 C204 12nF Film Samwha Electronics 15 C nF AC ceramic Samwha Electronics 16 R Ω 1W RS10.21%R-ND Stackpole Electronics Inc. 17 R102 1kΩ 1/4W 1.00KXTR-ND YAGEO 18 R103 Short 19 R kΩ 1/4W 5.11KXTR-ND YAGEO 20 R kΩ 1/4W 7.50KXTR-ND YAGEO 21 R106 27Ω 1/4W 27.4XTR-ND YAGEO 22 R kΩ 1/4W 2.21KXTR-ND YAGEO 23 R108 open 24 R109, R110 1MΩ 1/4W 1.00MXTR-ND YAGEO 25 R111 45kΩ 1/4W 45.3KXTR-ND YAGEO 26 R112 10kΩ 1/4W 10.0KXTR-ND YAGEO 27 R kΩ 1/4W 402KXTR-ND YAGEO 28 R114, R201 10kΩ 1/4W 10.0KXTR-ND YAGEO 29 R202 1kΩ 1/4W 1.00KXTR-ND YAGEO 30 R203 33kΩ 1/4W 33.2KXTR-ND YAGEO 31 R204 62kΩ 1/4W 61.9KXTR-ND YAGEO 32 R205 7KΩ 1/4W 6.98KXTR-ND YAGEO 33 R206 2kΩ 1/4W 2.00KXTR-ND YAGEO 34 RT101 5D-9 35 LF101 23mH 36 D101 1N V/1A 1N4937-ND Fairchild Semiconductor 37 D211, D212 FYP2010DN 100V/20A FYP2010DNTU-ND Fairchild Semiconductor 38 Z101 1N V 1N4736A-ND Fairchild Semiconductor 39 BD101 RBV606 Bridge Diode Fairchild Semiconductor 40 F A/250V 41 U1 FSFR2100 FPS FSFR2100-ND Fairchild Semiconductor 42 U2 H11A817B Opto-Coupler H11Ab17B-ND Fairchild Semiconductor 43 U3 KA431 Voltage Reference KA431LZTA-ND Fairchild Semiconductor 44 U4 2N2222 NPN Transistor PN2222BU-ND Fairchild Semiconductor 45 U5 2N2907 PNP Transistor PN2907-ND Fairchild Semiconductor 2007 Fairchild Semiconductor Corporation 5 FEB212_003 FSFR2100 Rev
6 1.5. Transformer Specification Figure 3. Transformer Specifications Winding Specification Pin (S F) Wire Turns Winding Method N p φ 30 (Litz wire) 36 Section winding N s φ 100 (Litz wire) 4 Section winding N s φ 100 (Litz wire) 4 Section winding Core & Bobbin Core: EER3542 (Ae=107mm 2 ) Bobbin: EER3542 (Horizontal) Electrical Specifications Pin Specification Remark Primary-Side Inductance (L P) µH ± 5% 100kHz, 1V Primary-Side Effective Leakage (L R) µH Maximum Short one of the secondary windings 2007 Fairchild Semiconductor Corporation 6 FEB212_003 FSFR2100 Rev
7 1.6. FSFR2100 (LLC) Printed Circuit Board Figure 4. Top PCB Image of the Evaluation Board Figure 5. Bottom PCB Image of the Evaluation Board 2007 Fairchild Semiconductor Corporation 7 FEB212_003 FSFR2100 Rev
8 2. Test Results 2.1. Primary-Side MOSFET Voltage and Current Waveforms Figure 6. Operation Waveforms at Nominal Input Voltage [V IN=390V DC, P O=192W (24V/8A)] C4: Transformer Primary-Side Current (2A/div), C1: Low-Side MOSFET Current (2A/div) C3: Low-Side MOSFET V DS (200V/div), Time: 5µs/div Figure 7. Operation Waveforms at Nominal Input Voltage [V IN=390V DC, P O=0W (24V/0A)] C4: Transformer Primary-Side Current (2A/div), C1: Low-Side MOSFET Current (2A/div) C3: Low-Side MOSFET V DS (200V/div), Time: 5µs/div 2007 Fairchild Semiconductor Corporation 8 FEB212_003 FSFR2100 Rev
9 Figure 8. Operation Waveforms at Minimum Input Voltage [V IN=340V DC, P O=192W (24V/8A)] C4: Transformer Primary-Side Current (2A/div), C1: Low-Side MOSFET Current (2A/div) C3: Low-Side MOSFET V DS (200V/div), Time: 5µs/div Figure 9. Operation Waveforms at Minimum Input Voltage [V IN=340V DC, P O=0W (24V/0A)] C4: Transformer Primary-Side Current (2A/div), C1: Low-Side MOSFET Current (2A/div) C3: Low-Side MOSFET V DS (200V/div), Time: 5µs/div 2007 Fairchild Semiconductor Corporation 9 FEB212_003 FSFR2100 Rev
10 2.2. Secondary-Side Rectifier Diodes Voltage and Current Waveforms Figure 10. Operation Waveforms at Nominal Input Voltage [V IN=390V DC, P O=192W (24V/8A)] C1: Transformer Primary-Side Current (2A/div), C4: Rectifier Diode (D211) Current (10A/div) C2: Rectifier Diode (D211) Voltage (50V/div), Time: 5µs/div Figure 11. Operation Waveforms at Minimum Input Voltage [V IN=340V DC, P O=192W (24V/8A)] C1: Transformer Primary-Side Current (2A/div), C4: Rectifier (D211) Diode Current (10A/div) C2: Rectifier Diode (D211) Voltage (50V/div), Time: 5µs/div 2007 Fairchild Semiconductor Corporation 10 FEB212_003 FSFR2100 Rev
11 Figure 12. Operation Waveforms at Nominal Input Voltage [V IN=390V DC, P O=192W (24V/8A)] C1: Rectifier Diode (D211) Current (10A/div), C4: Rectifier Diode (D212) Current (10A/div) C3: Rectifier Diode Voltage (50V/div), Time: 5µs/div Figure 13. Operation Waveforms at Minimum Input Voltage [V IN=340V DC, P O=192W (24V/8A)] C1: Rectifier Diode (D211) Current (10A/div), C4: Rectifier Diode (D212) Current (10A/div) C3: Rectifier Diode Voltage (50V/div), Time: 5µs/div 2007 Fairchild Semiconductor Corporation 11 FEB212_003 FSFR2100 Rev
![Start-up Waveforms at Nominal Input Voltage [V IN=390V DC, P O=192W (24V/8A)] C1: Output Voltage (20V/div), C4: Transformer Primary-Side Current (2A/div) C3: Low-Side MOSFET V DS (500V/div),](/docs-images/92/109551875/images/12-2.jpg "Time: 10ms/div Figure 15.")
12 2.3. On/Off Waveforms Figures 14 and 15 show the soft-start waveforms at full-load and no-load conditions, respectively, for nominal input voltage condition. For these waveforms, the input DC bus is applied first, then V CC for FSFR2100 is supplied. Figure 14. Start-up Waveforms at Nominal Input Voltage [V IN=390V DC, P O=192W (24V/8A)] C1: Output Voltage (20V/div), C4: Transformer Primary-Side Current (2A/div) C3: Low-Side MOSFET V DS (500V/div), Time: 10ms/div Figure 15. Start-up Waveforms at Nominal Input Voltage [V IN=390V DC, P O=0W (24V/0A)] C1: Output Voltage (20V/div), C4: Transformer Primary-Side Current (2A/div) C3: Low-Side MOSFET V DS (500V/div), Time: 10ms/div 2007 Fairchild Semiconductor Corporation 12 FEB212_003 FSFR2100 Rev
13 Figure 16 shows start-up waveforms when V CC of 18V is supplied first, then the input voltage source is applied. When the DC bus voltage reaches ~330V, the external brownout circuit connects V CC supply voltage to FSFR2100 so it starts up. Figure 17 shows shutdown waveforms when the input voltage source is turned off. When the DC bus voltage reaches ~260V, the external brownout circuit disconnects V CC from FSFR2100 so it stops operation. Figure 16. Power-on Waveforms at Nominal Input Voltage [V IN=390V DC, P O=192W (24V/8A)] C1: Output Voltage (20V/div), C4: Transformer Primary-Side Current (2A/div) C3: Low-Side MOSFET V DS (500V/div), Time: 5ms/div Figure 17. Power-Off Waveforms at Nominal Input Voltage [V IN=390V DC, P O=192W (24V/8A)] C3: Input Voltage (100V/div), C2: V CC Supply Voltage (10V/div) C4: Transformer Primary-Side Current (2A/div), Time: 20ms/div 2007 Fairchild Semiconductor Corporation 13 FEB212_003 FSFR2100 Rev
14 2.4. Output Voltage Ripple Figure 18 shows the output voltage ripple at nominal input voltage and full-load condition. The peak-to-peak ripple voltage is 0.5V, about 2% of the output voltage. Figure 19 shows the output voltage ripple with pulse load at nominal input voltage. The peak-to-peak ripple voltage is 0.8V, about 3% of the output voltage. Figure 18. Output Voltage Ripple at Nominal Input Voltage [V IN=390V DC, P O=192W (24V/8A)] C2: Output Voltage (500mV/div), C4: Transformer Primary-Side Current (2A/div), Time: 20ms/div Figure 19. Output Voltage Ripple with Pulse Load Current at Nominal Input Voltage [V IN=390V DC, (I O=0A 8A, Slew Rate=50mA/µs, Duty Cycle=50%, Frequency=180Hz)] C1: Output Current (5AV/div), C4: Transformer Primary-Side Current (2A/div) C2: Output Voltage Ripple, Time: 20ms/div 2007 Fairchild Semiconductor Corporation 14 FEB212_003 FSFR2100 Rev
15 2.5. Hold-Up Time Test To see the hold-up time, the input DC bus is disconnected while the converter operates in full-load condition. Observe that the output voltage is maintained for 34ms when the input DC bus is disconnected. Figure 20. Output Voltage Waveform after Turning Off Input Voltage [V IN=390V DC, P O=192W (24V/8A)] C3: Input Voltage (100V/div), C1: Output Voltage (10V/div) C4: Transformer Primary-Side Current (2A/div), Time: 10ms/div 2007 Fairchild Semiconductor Corporation 15 FEB212_003 FSFR2100 Rev
16 2.6. Protection Operation Waveforms Figure 21 shows the overload protection (OLP) waveforms. The output current increases from 8A to 16A. When the transformer primary-side current reaches its trip point of 3A, the over-current protection is triggered. Figure 22 shows the output short protection waveforms. When the transformer primary-side current reaches its trip point of 3A, the over-current protection is triggered. Figure 21. Protection Waveform at Overload Condition [V IN=390V DC, (I O=8A 16A)] C3: Low-Side Drain Voltage (200V/div), C4: Transformer Primary-Side Current (2A/div), Time: 50µs/div Figure 22. Protection Waveform at Output Short Condition [V IN=390V DC, (I O=8A Short)] C2: Current Sensing Pin (CS) Voltage (1V/div), C3: Low-Side MOSFET V DS (500V/div) C4: Transformer Primary-Side Current (2A/div), Time: 20µs/div 2007 Fairchild Semiconductor Corporation 16 FEB212_003 FSFR2100 Rev
17 2.7. Efficiency Eff (%) Po (W) Figure 23. Measured Efficiency 2007 Fairchild Semiconductor Corporation 17 FEB212_003 FSFR2100 Rev
18 2007 Fairchild Semiconductor Corporation 18 FEB212_003 FSFR2100 Rev
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