Reference Design RD-343

Transcription

1 Reference Design RD- Dual-PWM Controller FAN79 and Supervisor IC SG5-50W Design Featured Device Application Input Voltage Range Output Voltage (Rated Current) Rated Output Power Topology FAN79 SG5 ATX PC Power 90~V AC V (5.A) V (5.A) 5V (A).V (A) -V (0.A) 5V SB (A) 50W Forward and Flyback Converters Key Features FAN79 High-Voltage Startup Low Operating Current Interleaved Standby PWM / Forward PWM Switching Green Mode Standby PWM / Forward PWM Linearly Decreasing Standby PWM Frequency to 0kHz Remote On / Off AC Brownout Protection Forward PWM with Soft-Start Frequency Hopping to Reduce EMI Emissions Cycle-by-Cycle Current Limiting for Standby PWM / Forward PWM Leading-Edge Blanking for Standby PWM / Forward PWM Synchronized Slope Compensation for Standby PWM / Forward PWM GATE Output Maximum Voltage Clamp V DD Over-Voltage Protection (OVP) V DD Under-Voltage Lockout (UVLO) Internal Open-Loop Protection for Standby PWM / Forward PWM Constant Power Limit for Standby PWM / Forward PWM SG5 Two V Sense-Input Pins: VS and VSB Over-Voltage Protection (OVP), Over-Current Protection (OCP), and Under-Voltage Protection (UVP) for.v, 5V, and Two V Open-Drain Output for PGO and FPO Pins 00ms Power-Good Delay 00ms Turn-On Delay for.v, 5V, and Two V.8ms PSON Control to FPO Turn-Off Delay and 8ms PSON Control Delay No Lockup During the Fast AC Power On / Off Wide Supply Voltage Range:.V to 5V Additional Protection Input (P ext ) 009 Fairchild Semiconductor Corporation RD-_FAN7 Rev. 0.0.

2 009 Fairchild Semiconductor Corporation RD-_FAN79 Rev Schematic C C/0.7uF/X C8 C/7/00V C9 C/7/00V TR SCK05 BD BD/A/00V C C/0P/KV C C/70uF/00V C5 C/0P/50V D D/FR0 C C/uF/50V Q Q/9N90 D D/UF007 R R/0K/0 R R/7K/W HHV R R/0./W Q Q/N0 R R/0R/0805 R R/00K/-W R0 R//W R8 R/00R/0805 C0 C/0P/KV D D/UF007 R R/R HHV U U/PC-87 U U/PC-87 R0 R/K R R/50R R R/K R7 R/0K/% R8 R/0K/% D D/SB50 C C/000uF/0V C5 C/000uF/0V L L/0uH A K R U U/TL C8 C/0P/50V D9A D/0A/0V R0 R/0R/0 R9 R/0R/0 PG 5V.V V VS. R R/0R R7 R/50R D0A R R/0R/0 R R/0R/0 UVAC R5 R/0K/% R5 R/50R PSON DA D/0A/0V R5 R/0R/0 R R/00R/0 D D/A/0V R R/00R R5 R/8K R5 R/.8K C8 C/00uF/V C C/000uF/V L5 L/.8uH C9 C/00uF/0V C C/000uF/0V L L/uH R C C/000uF/V D7 D/N8 C0 C/00uF/0V R R/0R L L/.mH L L/0uH D8 D/N8 Q Q/907 R0 R/0 R0 R/70R R7 R/0K R9 R/0R R70 R/.K/% R7 R/0K/% C7 C/000uF/0V L7 L/.5uH A K R U5 U/TL U7 U/PC-87 R R/.K R8 R/0K R R/0K/% R5 R/5.K/% R R/5K/% A K R U U/TL 5V VS.V -V 5V UVAC R9 R/70R C C/0P/0 C0 C/0P/0 C C/0P/0 C C/0P/0 C C/0P/0 C5 C/0P/0 C C/0P/0.VSENSE C C/uF/50V C9 C/0P/50V VS5 VS R5 R/0R C0 C/0P/50V C C/70uF/00V Z MOV/7D7 Z MOV/7D7 R5 R/.M R R/.55M/0 R8 R/K R R/7R C C/7P/50V V R7 R/K/0805 C C/0P/50V R R/70K/0 R R/70K C C/0P/50V VREF R55 R/m R5 R/m V V R7 R/.5K/0805 R7 R/00R/0805 C C/7P/50V D5 D/N8 R9 R/00R/0 C7 C/05P C C/0P/50V V C8 C/5P/50V C5 C/5P/50V C C/5P/50V C7 C/5P/50V VS FAN FAN- CN CN/PIN D D/.8V Q5 Q/A R8 R/0R R7 R/.K NTC NTC/0K C9 C/0P/50V VSE VSD VSC R R/K D D/N8 R8 R/0R R9 R/0R -V V R R/7R R50 R/.7K C C/0P/50V R57 R58 R/K/W R59 R/N.A R R/0R R5 R R/0R Q Q/907 R5 R/0K R R/K TX TX/ERL8 C C/NC R.V 5VSB V VS. VS5 Z MOV/7D5 PG CN CN/.9mm/pin P P HV RI GND NC FBFYB 5 IFYB VDD OPWM IPWM 8 VREF 9 PGND VRMS OFYB 5 FBPWM 7 SS 0 ON/OFF U U/SG79 HV RI VREF N9 N N N5 N0 N N N7 D9 D/0A/0V D0C D0B D0 D/0A/0V DB D/0A/0V DC D/0A/0V D D/0A/0V L L/ R7 R/M/0 R7 R/M/0 CY C/7P C7 C/0P/50V C5 C/7P/50V C C/05P/50V R9 R/50K/ TX TX/EE9 PGI GND /FPO /PSON ISA RI ISB 7 VSB 8 IS VSA VS VS5 VCC 5 PGO OTP 9 IS5 0 U8 SG5/0 R75 R/50R V C7 C/5P/50V R7 R/0R R77 NA NTC NA F 7A/50V R R/M/0 LF TRANS L N L N R R/M/0 LF TRANS AC AC AC- AC- 5VSB Figure. Schematic

3 . Forward Converter Transformer (TX).. Winding Specification Figure. Transformer Schematic Diagram No Pin (S - F) Wire Turns Winding Method N 5 0.5Ф Ts Solenoid Winding Insulation: Polyester Tape t = 0.05mm, Layer E Shield: 0.05mm mm,. turns Insulation: Polyester Tape t = 0.05mm, Layer N 7,8 9,0, 0.Ф 7 Ts Solenoid Winding Insulation: Polyester Tape t = 0.05mm, Layer N 7,8 0.Ф 5 Ts Solenoid Winding Insulation: polyester Tape t = 0.05mm, Layer E Shield: 0.05mm mm,. turns Insulation: Polyester Tape t = 0.05mm, Layer N 5 0.5Ф Ts Solenoid Winding Insulation: Polyester Tape t = 0.0mm, Layer Core: ERl-8 Bobbin: ERL-8.. Electrical Characteristics Pin Specification Remark Primary-Side Inductance -.5mH ± 5% 00kHz, V 009 Fairchild Semiconductor Corporation RD-_FAN79 Rev. 0.0.

4 . Flyback Converter Transformer (TX) Figure. Transformer Schematic Diagram.. Winding Specification No Pin (S - F) Wire Turns Winding Method N 0.5Ф 5Ts Solenoid Winding Insulation: Polyester Tape t = 0.05mm, Layer E Shield: 0.05mm mm,. turns Insulation: Polyester Tape t = 0.05mm, Layer N Ф Ts Solenoid Winding Insulation: Polyester Tape t = 0.05mm, Layer E Shield: 0.05mm mm,. turns Insulation: Polyester Tape t = 0.05mm, Layer N 0.5Ф 7Ts Solenoid Winding Insulation: Polyester Tape t = 0.0mm, Layer Core: EEL-9 Bobbin: EEL-9.. Electrical Characteristics Pin Specification Remark Primary-Side Inductance -.58mH ± 5% 00kHz, V Leakage Inductance - 0µH ± 5% Short One of Secondary-Side Windings 009 Fairchild Semiconductor Corporation RD-_FAN79 Rev. 0.0.

5 . Forward Output Inductor (L) Figure. Inductor Schematic Diagram.. Winding Specification No Pin (S - F) Wire Turns Winding Method N 8.0Ф.5Ts N 7.0Ф.5Ts N 0.0Ф 0.5Ts N 9.0Ф 0.5Ts N Ф.5Ts Core: Toroid Optimag Magnetic HF Electrical Characteristics Pin Specification Remark Primary-Side Inductance -8 0μH ± 5% khz, V 009 Fairchild Semiconductor Corporation 5 RD-_FAN79 Rev. 0.0.

6 5. Typical Performance Table. Standby Power Consumption Operating Condition Input Power When V IN = 5V AC, with 0.5W Loading 0.8W When V IN = 0V AC, with 0.5W Loading 0.8W When V IN = 0V AC, with 0.5W Loading 0.87W When V IN = V AC, with 0.5W Loading 0.9W 8 8 5Vac 8. Efficiency (%) Vac Output Power (%) Figure 5. Efficiency 009 Fairchild Semiconductor Corporation RD-_FAN79 Rev. 0.0.

7 . Related Resources FAN79 Highly Integrated, Dual-PWM Combination Controller SG5 PC Power Supply Supervisors Reference Design Disclaimer Fairchild Semiconductor Corporation ( Fairchild ) provides these reference design services as a benefit to our customers. Fairchild has made a good faith attempt to build for the specifications provided or needed by the customer. Fairchild provides this product as is and without recourse and MAKES NO WARRANTY, EXPRESSED, IMPLIED OR OTHERWISE, INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Customer agrees to do its own testing of any Fairchild reference designs in order to ensure design meets the customer needs. Neither Fairchild nor Customer shall be liable for incidental or consequential damages, including but not limited to, the cost of labor, re-qualifications, rework charges, delay, lost profits, or loss of goodwill arising out of the sale, installation or use of any Fairchild product. Subject to the limitations herein, Fairchild will defend any suit or proceeding brought against Customer if it is based on a claim that any product furnished hereunder constitutes an infringement of any intellectual property rights. Fairchild must be notified promptly in writing and given full and complete authority, information and assistance (at Fairchild s expense) for defense of the suit. Fairchild will pay damages and costs therein awarded against Customer but shall not be responsible for any compromise made without its consent. In no event shall Fairchild s liability for all damages and costs (including the costs of the defense by Fairchild) exceed the contractual value of the products or services that are the subject of the lawsuit. In providing such defense, or in the event that such product is held to constitute infringement and the use of the product is enjoined, Fairchild, in its discretion, shall procure the right to continue using such product, or modify it so that it becomes noninfringing, or remove it and grant Customer a credit for the depreciated value thereof. Fairchild s indemnity does not extend to claims of infringement arising from Fairchild s compliance with Customer s design, specifications and/or instructions, or the use of any product in combination with other products or in connection with a manufacturing or other process. The foregoing remedy is exclusive and constitutes Fairchild s sole obligation for any claim of intellectual property infringement and Fairchild makes no warranty that products sold hereunder will not infringe any intellectual property rights. All solutions, designs, schematics, drawings, boards or other information provided by Fairchild to Customer are confidential and provided for Customer s own use. Customer may not share any Fairchild materials with other semiconductor suppliers. 009 Fairchild Semiconductor Corporation 7 RD-_FAN79 Rev. 0.0.