FSFR-Series / FSFR2100 Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converter Features Description FSFR-series is a highly integrated power switch family specially designed for high-efficiency half-bridge resonant converters. Offering everything necessary to build a reliable and robust resonant converter, the FSFRseries simplifies designs and improves productivity, while improving performance. The FSFR-series combines power MOSFETs with fast-recovery type body diodes, a high-side gate-drive circuit, an accurate current controlled oscillator, frequency limit circuit, soft-start, and built-in protection functions. The high-side drive circuit has a common-mode noise cancellation capability, which guarantees stable operation with excellent noise immunity. The fast-recovery body diode of the MOSFETs improves reliability against abnormal operation conditions, while minimizing the effect of the reverse recovery. Using the zero-voltage-switching (ZVS) technique dramatically reduces the switching losses and the efficiency is significantly improved. The ZVS also reduces the switching noise noticeably, which allows a small-sized EMI filter. Variable Frequency Control with 50% Duty Cycle for Half-bridge Resonant Converter Topology High Efficiency through Zero Voltage Switching (ZVS) Internal Super-FETs with Fast-Recovery Type Body Diode (trr=120ns) Fixed Dead Time (350ns) Optimized for MOSFETs Up to 300kHz Operating Frequency Pulse Skipping for Frequency Limit (Programmable) at Light-Load Condition Remote On/Off Control Using Control Pin Protection Functions: Over-Voltage Protection (OVP), Overload Protection (OLP), Over-Current Protection (OCP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown (TSD) Applications PDP TV and LCD TV Desktop PC and Server Adapter Telecom Power Audio Power The FSFR-series can be applied to various resonant converter topologies such as series resonant, parallel resonant, and LLC resonant converters. Related Resources AN4151 — Half-bridge LLC Resonant Converter Design TM using FSFR-series Fairchild Power Switch (FPS ) Ordering Information Part Number Package FSFR2100 Operating RDS(ON_MAX) Temperature Maximum Output Power without Heatsink (1,2) (VIN=350~400V) Maximum Output Power with Heatsink (1,2) (VIN=350~400V) 9-SIP -40 to +85°C 0.38Ω 200W 450W FSFR2000 (3) 9-SIP -40 to +85°C 0.67Ω 160W 350W FSFR1900 (3) 9-SIP -40 to +85°C 0.85Ω 140W 300W FSFR1800 (3) 9-SIP -40 to +85 ºC 0.95Ω 120W 260W Notes: 1. The junction temperature can limit the maximum output power. 2. Maximum practical continuous power in an open-frame design at 50°C ambient. 3. Preliminary part design. Contact a Fairchild representative for availability. All packages are lead free per JEDEC: J-STD-020B standard. © 2007 Fairchild Semiconductor Corporation FSFR2100 • 1.0.0 www.fairchildsemi.com FSFR-Series — Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converter October 2007 D1 Cr Llk LVcc VCC Np HVcc Lm Ns RT CON CDL VIN Vo Ns VDL Control IC D2 VCTR KA431 CS SG PG Rsense Figure 1. Typical Application Circuit (LLC Resonant Half-bridge Converter) Block Diagram CF RF FSFR-Series — Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converter Application Circuit Diagram 1.5μ s Figure 2. Internal Block Diagram © 2007 Fairchild Semiconductor Corporation FSFR2100 • 1.0.0 www.fairchildsemi.com 2 1 VDL 2 3 4 5 6 7 8 RT SG LVcc CON CS PG 9 10 VCTR HVcc Figure 3. Package Diagram Pin Definitions Pin # Name Description 1 VDL This pin is the drain of the high-side MOSFET. It is typically connected to the input DC link voltage. 2 CON This pin is for enable/disable and protection. When the voltage of this pin is above 0.6V, the IC operation is enabled. When the voltage of this pin drops below 0.4V, gate drive signals for both MOSFETs are disabled. When the voltage of this pin increases above 5V, protection is triggered. 3 RT This pin programs the switching frequency. Typically, an opto-coupler is connected to control the switching frequency for the output voltage regulation. 4 CS This pin senses the current flowing through the low-side MOSFET. Typically, negative voltage is applied on this pin. 5 SG This pin is the control ground. 6 PG This pin is the power ground. This pin is connected to the source of the low-side MOSFET. 7 LVcc 8 NC 9 HVcc This pin is the supply voltage of the high-side drive circuit IC. 10 VCTR This pin is the drain of the low-side MOSFET. Typically, a transformer is connected to this pin. FSFR-Series — Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converter Pin Assignments This pin is the supply voltage of the control IC. No connection. © 2007 Fairchild Semiconductor Corporation FSFR2100 • 1.0.0 www.fairchildsemi.com 3 Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. TA=25°C unless otherwise specified. Symbol VDS LVcc Parameter Min. Max. Unit Maximum Drain-to-source Voltage (VDL-VCTR and VCTR-PG) 600 Low-side Supply Voltage -0.3 25.0 V -0.3 25.0 V HVcc to VCTR High-side VCC Pin to Low-side Drain Voltage V HVcc High-side Floating Supply Voltage -0.3 625.0 V VCON Control Pin Input Voltage -0.3 L-VCC V VCS Current Sense (CS) Pin Input Voltage -5.0 1.0 V VRT RT Pin Input Voltage -0.3 5.0 V 50 V/ns 12 W +150 °C dVCTR/dt Allowable Low-side MOSFET Drain Voltage Slew Rate (4) PD Total Power Dissipation TJ Operating Junction Temperature TA Operating Ambient Temperature -40 +85 °C Storage Temperature Range -55 +150 °C TSTG MOSFET Section VDGR Drain Gate Voltage (RGS=1MΩ) VGS Gate Source (GND) Voltage ±30 V IDM Drain Current Pulsed 33 A ID Continuous Drain Current 600 V TC=25℃ 11 TC=100℃ 7 A Note: 4. Per MOSFET when both MOSFETs are conducting. Thermal Impedance TA=25°C unless otherwise specified. Symbol Parameter Value Unit θJC Junction-to-Case Center Thermal Impedance (Both MOSFETs Conducting) 10.44 ºC/W © 2007 Fairchild Semiconductor Corporation FSFR2100 • 1.0.0 FSFR-Series — Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converter Absolute Maximum Ratings www.fairchildsemi.com 4 TA=25°C unless otherwise specified. Symbol Parameter Test Conditions Specifications Min. Typ. Unit Max. MOSFET Section BVDSS Drain-to-Source Breakdown Voltage RDS(ON) On-State Resistance Trr Body Diode Reverse Recovery Time ID=200μA, TA=25°C 600 V ID=200μA, TA=125°C 650 VGS=10, ID=5.5A 0.32 (5) V 0.38 120 Ω ns Supply Section ILK Offset Supply Leakage Current H-Vcc=VC=600V 50 μA IQHVCC Quiescent H-Vcc Supply Current (H-VCCUV+) - 0.1V 50 120 μA IQLVCC Quiescent L-Vcc Supply Current (L-VCCUV+) - 0.1V 100 200 μA IOHVCC Operating H-Vcc Supply Current (RMS Value) FOSC=100KHz, VCON > 0.6V 6 9 mA No switching, VCON < 0.4V 100 200 μA IOLVCC Operating L-Vcc Supply Current (RMS Value) FOSC=100KHz, VCON > 0.6V 7 11 mA No switching, VCON < 0.4V 2 4 mA UVLO Section LVCCUV+ L-Vcc Supply Under-voltage Positive Going Threshold (L-Vcc start) 13.0 14.5 16.0 V LVCCUV- L-Vcc Supply Under-voltage Negative Going Threshold (L-Vcc stop) 10.2 11.3 12.4 V LVCCUVH L-Vcc Supply Under-voltage Hysteresis HVCCUV+ H-Vcc Supply Under-voltage Positive Going Threshold (H-Vcc start) 8.2 9.2 10.2 V HVCCUV- H-Vcc Supply Under-voltage Negative Going Threshold (H-Vcc stop) 7.8 8.7 9.6 V HVCCUVH H-Vcc Supply Under-voltage Hysteresis 3.2 V 0.5 V Oscillator & Feedback Section VCONDIS Control Pin Disable Threshold Voltage 0.36 0.40 0.44 V VCONEN Control Pin Enable Threshold Voltage 0.54 0.60 0.66 V VRT V-I Converter Threshold Voltage 1.5 2.0 2.5 V FOSC Output Oscillation Frequency 94 100 106 KHz 48 50 52 % DC Output Duty Cycle FSS Internal Soft-Start Initial Frequency TSS2 Internal Soft-Start Time RT=5.2KΩ FSS=FOSC+40kHz, RT=5.2KΩ 140 2 3 FSFR-Series — Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converter Electrical Characteristics KHz 4 ms Note: 5. This parameter, although guaranteed, is not tested. Continued on the following page… © 2007 Fairchild Semiconductor Corporation FSFR2100 • 1.0.0 www.fairchildsemi.com 5 TA=25°C unless otherwise specified. Specifications Symbol Parameter Test Conditions Unit Min Typ Max Protection Section IOLP OLP Delay Current VCON=4V 3.6 4.8 6.0 μA VOLP OLP Protection Voltage VCON > 3.5V 4.5 5.0 5.5 V VOVP L-Vcc Over-Voltage Protection L-Vcc > 21V 21 23 25 V VAOCP AOCP Threshold Voltage ΔV/Δt=-1V/µs -1.0 -0.9 -0.8 V (6) VCS < VOCP; ΔV/Δt=-1V/us TBAO AOCP Blanking Time VOCP OCP Threshold Voltage TBO OCP Blanking Time TDA Delay Time (Low Side) Detecting from VAOCP (6) to Switch Off TSD Thermal Shutdown Temperature ISU Protection Latch Sustain L-Vcc Supply Current VPRSET (6) 50 ns (V/(t=-1V/µs; VFB=L_Vcc -0.64 -0.58 -0.52 V VCS < VOCP; ΔV/Δt=-1V/µs; VFB=L_VCC 1.0 1.5 2.0 μs 250 400 ns 130 150 °C 100 150 μA ΔV/Δt=-1V/µs (6) 110 L-Vcc=7.5V Protection Latch Reset L-Vcc Supply Voltage 5 V Dead-Time Control Section DT Dead Time (7) 350 Notes: 6. These parameters, although guaranteed, are not tested in production. 7. These parameters, although guaranteed, are tested only in EDS (wafer test) process. © 2007 Fairchild Semiconductor Corporation FSFR2100 • 1.0.0 ns FSFR-Series — Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converter Electrical Characteristics (Continued) www.fairchildsemi.com 6 1.1 1.1 1.05 1.05 Normalized at 25OC Normalized at 25OC These characteristic graphs are normalized at TA=25ºC. 1 0.95 1 0.95 0.9 0.9 -50 -25 0 25 50 75 -50 100 -25 0 O Temp ( C) Temp 50 75 100 (OC) Figure 5. Switching Frequency vs. Temp. 1.1 1.1 1.05 1.05 Normalized at 25OC Normalized at 25OC Figure 4. Low-side MOSFET Duty Cycle vs. Temp. 1 0.95 0.9 1 0.95 0.9 -50 -25 0 25 50 75 100 -50 -25 0 25 50 75 100 Temp (OC) Temp (OC) Figure 6. High-side VCC (H-Vcc) Start vs. Temp. Figure 7. High-side VCC (H-Vcc) Stop vs. Temp. 1.1 1.1 1.05 1.05 Normalized at 25OC Normalized at 25OC 25 1 0.95 FSFR-Series — Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converter Typical Performance Characteristics 1 0.95 0.9 0.9 -50 -25 0 25 50 75 100 -50 -25 0 25 50 75 100 Temp (OC) Temp (OC) Figure 8. Low-side VCC (L-Vcc) Start vs. Temp. Figure 9. Low-side VCC (L-Vcc) Stop vs. Temp. © 2007 Fairchild Semiconductor Corporation FSFR2100 • 1.0.0 www.fairchildsemi.com 7 1.1 1.1 1.05 1.05 Normalized at 25OC Normalized at 25OC These characteristic graphs are normalized at TA=25ºC. 1 0.95 0.95 0.9 0.9 -50 -25 0 25 50 75 -50 100 -25 0 50 75 100 Temp (OC) Figure 10. OLP Delay Current vs. Temp. Figure 11. OLP Protection Voltage vs. Temp. 1.1 1.1 1.05 1.05 1 0.95 1 0.95 0.9 0.9 -50 -25 0 25 50 75 -50 100 -25 0 Temp (OC) 25 Temp Figure 12. L-Vcc OVP Voltage vs. Temp. 50 75 100 (OC) Figure 13. V-I Converter Voltage vs. Temp. 1.1 1.1 1.05 1.05 Normalized at 25OC Normalized at 25OC 25 Temp (OC) Normalized at 25OC Normalized at 25OC 1 1 0.95 0.9 FSFR-Series — Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converter Typical Performance Characteristics (Continued) 1 0.95 0.9 -50 -25 0 25 50 75 -50 100 -25 0 25 50 75 100 Temp (OC) Temp (OC) Figure 14. CON Pin Enable Voltage vs. Temp. Figure 15. Current Limit vs. Temp. © 2007 Fairchild Semiconductor Corporation FSFR2100 • 1.0.0 www.fairchildsemi.com 8 1. Basic Operation: FSFR-series is designed to drive high-side and low-side MOSFETs complementarily with 50% duty cycle. A fixed dead time of 350ns is introduced between consecutive transitions, as shown in Figure 16. Gain 1.8 f min f max f normal f ISS 1.6 Dead time High side MOSFET gate drive 1.4 1.2 Low side MOSFET gate drve 1.0 Soft-start 0.8 time Figure 16. MOSFETs Gate Drive Signal 0.6 60 70 80 90 100 110 120 140 130 150 freq (kHz) 2. Internal Oscillator: FSFR-series employs a currentcontrolled oscillator, as shown in Figure 17. Internally, the voltage of RT pin is regulated at 2V and the charging/discharging current for the oscillator capacitor, CT, is obtained by copying the current flowing out of RT pin (ICTC) using a current mirror. Therefore, the switching frequency increases as ICTC increases. Figure 18. Resonant Converter Typical Gain Curve LVcc VDL RT Rmax Rmin Rss Css CON Control IC SG PG Figure 19. Frequency Control Circuit The minimum switching frequency is determined as: f min = Figure 17. Current Controlled Oscillator (1) Assuming the saturation voltage of opto-coupler transistor is 0.2V, the maximum switching frequency is determined as: 3. Frequency Setting: Figure 18 shows the typical voltage gain curve of a resonant converter, where the gain is inversely proportional to the switching frequency. The output voltage can be regulated by modulating the switching frequency. Figure 19 shows the typical circuit configuration for RT pin, where the opto-coupler transistor is connected to the RT pin to modulate the switching frequency. © 2007 Fairchild Semiconductor Corporation FSFR2100 • 1.0.0 5.2k Ω × 100(kHz ) Rmin FSFR-Series — Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converter Functional Description f max = ( 5.2k Ω 4.68k Ω + ) × 100(kHz ) Rmin Rmax (2) To prevent excessive inrush current and overshoot of output voltage during start-up, increase the voltage gain of the resonant converter progressively. Since the voltage gain of the resonant converter is inversely proportional to the switching frequency, the soft-start is implemented by sweeping down the switching frequency ISS from an initial high frequency (f ) until the output voltage is established. The soft-start circuit is made by connecting R-C series network on the RT pin, as shown in Figure 19. FSFR-series also has an internal soft-start for 3ms to reduce the current overshoot during the initial www.fairchildsemi.com 9 f ISS = ( 5.2k Ω 5.2k Ω ) × 100 + 40 (kHz ) (3) + Rmin RSS It is typical to set the initial frequency of soft-start 2~3 times the resonant frequency (fO) of the resonant network. The soft-start time is determined by the RC time constant as: TSS = RSS ⋅ CSS (4) Figure 22. Control Pin Configuration for Pulse Skipping fs f ISS 40kHz Remote On / Off: When an auxiliary power supply is used for standby, the main power stage using FSFRseries can be shut down by pulling down the control pin voltage, as shown in Figure 23. R1 and C1 are used to ensure soft-start when switching resumes. Control loop take over time OP1 Figure 20. Frequency Sweeping of Soft-start Main Output R1 4. Control Pin: The FSFR-series has a control pin that can be used for protection, cycle skipping, and remote on/off. Figure 21 shows the internal block diagram for control pin. C1 LVcc Idelay CON Main Off FPS Aux Output Rmin - 2 0.6V/0.4V + + 5V OLP - LVcc + OVP - S Q R -Q Auto-restart protection Stop switching OP1 LVcc good FSFR-Series — Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converter cycles, which adds 40kHz to the initial frequency of the external soft-start circuit, as shown in Figure 20. Thus, the initial frequency of the soft-start is given as: Figure 23. Remote On / Off Circuit Figure 21. Internal Block of Control Pin 5. Protection Circuits: The FSFR-series has several self-protective functions, such as Overload Protection (OLP), Over-Current Protection (OCP), Abnormal OverCurrent Protection (AOCP), Over-Voltage Protection (OVP), and Thermal Shutdown (TSD). OLP, OCP, and OVP are auto-restart mode protections, while AOCP and TSD are latch-mode protections, as shown in Figure 24. Protection: When the control pin voltage exceeds 5V, protection is triggered. Detailed applications are described in the protection section. Pulse Skipping: FSFR-series stops switching when the control pin voltage drops below 0.4V and resumes switching when the control pin voltage rises above 0.6V. To use pulse-skipping, the control pin should be connected to the opto-coupler collector pin. The frequency that causes pulse skipping is given as: SKIP = 5.2 k 4.16 k + R min R max © 2007 Fairchild Semiconductor Corporation FSFR2100 • 1.0.0 x100 (kHz) Auto-restart Mode Protection: Once a fault condition is detected, switching is terminated and the MOSFETs remain off. When LVcc falls to the LVcc stop voltage of 11V, the protection is reset. The FPS resumes normal operation when LVcc reaches the start voltage of 14V. (5) www.fairchildsemi.com 10 Current Sensing Using Resonant Capacitor Voltage: For high-power applications, current sensing using a resistor may not be available due to the severe power dissipation in the resistor. In that case, indirect current sensing using the resonant capacitor voltage can be a good alternative because the amplitude of the resonant p-p capacitor voltage (Vcr ) is proportional to the resonant p-p current in the primary side (Ip ) as: LVcc 7 + LVcc good Internal Bias Vref - 11 / 14 V VCr p − p = Shutdown OCP OVP LVcc good CON 20k S Q R -Q Q S -Q R AOCP TSD F/F F/F (6) 2π f sCr To minimize power dissipation, a capacitive voltage divider is generally used for capacitor voltage sensing, as shown in Figure 27. Latch protection Auto-restart protection OLP I p p− p LVcc < 5V Figure 24. Protection Blocks Np CON Current Sensing Using Resistor: FSFR-series senses drain current as a negative voltage, as shown in Figure 25 and Figure 26. Half-wave sensing allows low power dissipation in the sensing resistor while full-wave sensing has less switching noise in the sensing signal. Cd Control IC Ns Ip Rd SG PG Ns 100 Cr VSENSE Np Ns CB Cr CSENSE Ip Ns Control IC VCS Ids CS SG VCr VCrp-p PG Rsense VCS Ids Vsense Vsense pk CB = VCr p − p Csense + CB Vsense pk = VCON 2 Vsensepk Figure 25. Half-wave Sensing VCON Vsensepk Ids FSFR-Series — Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converter Latch-Mode Protection: Once this protection is triggered, switching is terminated and the MOSFETs remain off. The latch is reset only when LVcc is discharged below 5V. Tdelay = Rd Cd Figure 27. Current Sensing Using Resonant Capacitor Voltage VCS 5.1 Over-Current Protection (OCP): When the sensing pin voltage drops below -0.6V, OCP is triggered and MOSFETs remain off. This protection has a shutdown time delay of 1.5µs to prevent premature shutdown during start-up. Cr Control IC VCS Np CS PG SG Rsense Ns 5.2 Abnormal Over-Current Protection (AOCP): If the secondary rectifier diodes are shorted, large current with extremely high di/dt can flow through the MOSFET before OCP or OLP is triggered. AOCP is triggered without shutdown delay when the sensing pin voltage drops below -0.9V. This protection is latch mode and reset when LVcc is pulled down below 5V. Ns Ids Figure 26. Full-wave Sensing © 2007 Fairchild Semiconductor Corporation FSFR2100 • 1.0.0 www.fairchildsemi.com 11 VCON = CB VCr p − p 2(CB + Csense ) where VCr voltage. p-p 5.5 Thermal Shutdown (TSD): The MOSFETs and the control IC in one package makes it easy for the control IC to detect the abnormal over-temperature of the MOSFETs. If the temperature exceeds approximately 130°C, the thermal shutdown triggers. (7) is the amplitude of the resonant capacitor © 2007 Fairchild Semiconductor Corporation FSFR2100 • 1.0.0 FSFR-Series — Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converter 5.4 Over-Voltage Protection (OVP): When the LVcc reaches 23V, OVP is triggered. This protection is used when auxiliary winding of the transformer to supply VCC to FPS is utilized. 5.3 Overload Protection (OLP): Overload is defined as the load current exceeding its normal level due to an unexpected abnormal event. In this situation, the protection circuit should trigger to protect the power supply. However, even when the power supply is in the normal condition, the overload situation can occur during the load transition. To avoid premature triggering of protection, the overload protection circuit should be designed to trigger only after a specified time to determine whether it is a transient situation or a true overload situation. Figure 27 shows a typical overload protection circuit. By sensing the resonant capacitor voltage on the control pin, the overload protection can be implemented. Using RC time constant, shutdown delay can be also introduced. The voltage obtained on the control pin is given as: www.fairchildsemi.com 12 Application FPS™ Device Input Voltage Range Rated Output Power Output Voltage (Rated Current) LCD TV FSFR2100 400V (20ms hold-up time) 192W 24V-8A Features High efficiency ( >94% at 400VDC input) Reduced EMI noise through zero-voltage-switching (ZVS) Enhanced system reliability with various protection functions D211 FYP2010DN C102 18nF/ 630V JP1 10 VCC R106 27 LVcc C105 22µF/ 50V VIN=400VDC D101 UF4007 Np R104 7.2k C108 12nF Ns Control IC VCTR C102 100pF SG PG R101 0.2 Figure 28. Typical Application Circuit © 2007 Fairchild Semiconductor Corporation FSFR2100 • 1.0.0 R202 1k C204 12nF R204 62k D212 FYP2010DN R206 2k U3 KA431 CS R102 1k R201 10k C106 150nF CON C101 220µF/ 450V Vo HVcc C107 10µF R107 2.5k C201 2200µF 35V Ns VDL RT R105 7.5k C202 2200µF 35V C203 47nF R203 33k R205 7k FSFR-Series — Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converter Typical Application Circuit (Half-bridge LLC Resonant Converter) www.fairchildsemi.com 13 Usually, LLC resonant converter requires large leakage inductance value. To obtain a large leakage inductance, sectional winding method is used. 2 Core: EER3542 (Ae=107 mm ) Bobbin: EER3542 (Horizontal) 2.5mm 15mm 8mm Np Ns2 Ns1 Pin(S → F) Wire Turns Winding Method Np 8→1 0.12φ×30 (Litz wire) 45 Section winding Ns1 12 → 9 0.1φ×100 (Litz wire) 5 Section winding Ns2 16 → 13 0.1φ×100 (Litz wire) 5 Section winding Pin Specification Primary-side Inductance (LP) 1－8 630μH ± 5% 100kHz, 1V Primary-side Effective Leakage (LR) 1－8 145μH ± 5%. Short one of the secondary windings © 2007 Fairchild Semiconductor Corporation FSFR2100 • 1.0.0 Remark FSFR-Series — Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converter Typical Application Circuit (Continued) www.fairchildsemi.com 14 FSFR-Series — Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converter Physical Dimensions Figure 29. 9-SIP Package © 2007 Fairchild Semiconductor Corporation FSFR2100 • 1.0.0 www.fairchildsemi.com 15 FSFR-Series — Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converter © 2007 Fairchild Semiconductor Corporation FSFR2100 • 1.0.0 www.fairchildsemi.com 16