FAN6204A ONSEMI | Alldatasheet
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© 2015 Semiconductor Components Industries, LLC. www.onsemi.com FAN6204A • Rev. 1.1 FAN6204A — mWSaver™ Synchronous Rectification Controller for Flyback and Forward Freewheeling Rectification FAN6204A mWSaver™ Synchronous Rectification Controller for Flyback and Forward Freewheeling Rectification
Features
mWSaver™ Technology: - Internal Green Mode to Stop SR Switching for Lower No-Load Power Consumption - 1.1 mA Ultra-Low Green Mode Operating Current SR Controller Suited for Flyback Converter in QR, DCM, and CCM Operation Suited for Forward Freewheeling Rectification PWM Frequency Tracking with Secondary-Side Winding Voltage Detection Ultra-Low VDD Operating Voltage for Various Output Voltage Applications (5 V~24 V) VDD Pin Over-Voltage Protection (OVP) 12 V (Typical) Gate Driver Clamp 8-Pin SOP Package
Applications
AC/DC NB Adapters Open-Frame SMPS Battery Charger
Description
FAN6204A is a secondary -side synchronous rectification (SR) contro ller to drive SR MOSFET for improving efficiency. The IC is suitable for flyback converters and forward free-wheeling rectification. FAN6204A can be applied in continuous or discontinuous conduction mode (CCM and DCM) and quasi-resonant (QR) flyback conver ters based on the proprietary innovative linear-predict timing -control technique. The benefits of this technique include a simple control method without current-sense circuitry to accomplish noise immunity. With PWM frequency tracking and secondary-side winding voltage detection, FAN6204A can operate in both fixed- and variable-frequency systems. In Green Mode, the SR controller stops all SR switching operation to reduce the operating current. Power consumption is maintained at minimum level in light - load condition.
Ordering Information
Temperature Range Package Packing Method FAN6204AMX -40°C to +105°C 8-Pin, Small Outline Package (SOP) Tape & Reel
© 2015 Semiconductor Components Industries, LLC. www.onsemi.com FAN6204A • Rev. 1.1 4 FAN6204A — mWSaver™ Synchronous Rectification Controller for Flyback and Forward Freewheeling Rectification Absolute Maximum Ratings 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. Symbol Parameter Min. Max. Unit VDD DC Supply Voltage 30 V VL LPC, RES -0.3 7.0 V PD Power Dissipation(TA=25°C) 0.8 W ΘJA Thermal Resistance (Junction-to-Air) 151 °C/W ΘJC Thermal Resistance (Junction-to-Case) 58 °C/W TSTG Storage Temperature Range -55 +150 °C TJ Junction Temperature -40 +150 ºC TL Lead Temperature (Soldering 10 Seconds) +260 °C ESD Human Body Model 5 kV Charged Device Model 2 Notes: 1. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. 2. All voltage values, except differential voltages, are given with respect to GND pin.
© 2015 Semiconductor Components Industries, LLC. www.onsemi.com FAN6204A • Rev. 1.1 5 FAN6204A — mWSaver™ Synchronous Rectification Controller for Flyback and Forward Freewheeling Rectification
Electrical Characteristics
VDD=15 V and TA=25°C unless otherwise noted. Symbol Parameter Conditions Min. Typ. Max. Unit VOP Continuously Operating Voltage VDD- OFF 28.5 V VDD-ON Turn-On Threshold Voltage 4.3 4.8 5.3 V VDD-OFF Turn-Off Threshold Voltage 4.0 4.5 5.0 V VDD-HYST VDD-ON – VDD-OFF 0.1 0.3 0.5 V IDD-OP Operating Current VDD=15 V, LPC=50 kHz, MOSFET CISS=6000 pF 7 8 mA IDD-GREEN Operating Current in Green Mode VDD=15 V 1.1 1.3 mA IDD-ST Startup Current VDD< VDD-ON 150 200 A VDD-OVP VDD Over-Voltage Protection 26.0 27.5 28.5 V VDD-OVP-HYST Hysteresis Voltage for VDD OVP 1.8 2.1 2.4 V tVDD-OVP VDD OVP Debounce Time 40 70 100 s Output Driver Section VZ Gate Output Clamp Voltage 10 12 14 V VOL Output Voltage Low VDD=6 V, IO=50 mA 0.5 V VOH Output Voltage High VDD=6 V, IO=50 mA 4 V tR Rising Time VDD=12 V, CL=6 nF, OUT=2 V~9 V 30 70 120 ns VDD=6 V, CL=6 nF, OUT=0.4 V~4 V 70 120 170 ns tF Falling Time VDD=12 V, CL=6 nF, OUT=9 V~2 V 20 50 100 ns VDD=6 V, CL=6 nF, OUT=4 V~0.4 V 20 90 130 ns tPD_HIGH_LPC Propagation Delay to Turn-on Gate (LPC Trigger) tR: 0 V~2 V, VDD=12 V 250 ns tPD_LOW_LPC Propagation Delay to Turn-off Gate (LPC Trigger)(3) tF: 100%~90%, VDD=12 V 180 ns tMAX-PERIOD Limitation between LPC Rising Edge to Gate Falling Edge 22.5 25.0 28.0 s VPMOS-ON Internal PMOS Turn-On to Pull-HIGH Gate(3) 8.3 V VPMOS-ON- HYS Hysteresis Voltage On(3) 0.9 V tINHIBIT Gate Inhibit Time M2 Option (Enable) 1.6 2.2 2.8 s VGATE-PULL- HIGH Gate Pull-HIGH Voltage VDD=5 V 4.5 V LPC Section tBNK Blanking Time for Charging CT 400 500 600 ns tDELAY-COMP Sampling Continuous Time for tBNK Compensation(3) 1 s VLPC-SOURCE LPC Lower Clamp Voltage Source ILPC=5 µA 0.1 0.2 0.3 V ILPC-SOURCE LPC Source Current VLPC=0 V 40 80 120 A VLPC-EN Threshold Voltage to Enabled SR Switching VLPC-EN=VLPC-HIGH x 0.83 at VLPC- HIGH x 0.83< 2 V, VO=15 V, VO=VDD, VLPC-HIGH=1.2 V 0.85 1.00 1.15 V VEN-CLAMP Threshold Clamp Voltage to Enable SR Switching VLPC-EN=2 V at VLPC-HIGH x 0.83 >
2 V 2 V
VLPC-TH-HIGH Threshold Voltage on LPC Rising Edge Decrease VLPC from 0.05 Vo+0.05, VO=15 V, VO=VDD 0.7 0.8 0.9 V tBNK-DIS Blanking Time at the Falling Edge of VLPC Prevent LPC Spike to Turn-Off Gate 350 ns
© 2015 Semiconductor Components Industries, LLC. www.onsemi.com FAN6204A • Rev. 1.1 6 FAN6204A — mWSaver™ Synchronous Rectification Controller for Flyback and Forward Freewheeling Rectification VDD=15 V and TA=25°C unless otherwise noted. Symbol Parameter Conditions Min. Typ. Max. Unit LPC Section (Continued) VLPC-CLAMP-H Higher Clamp Voltage(3) 6 V VLPC-DIS LPC Voltage to Disable SR Gate 4.0 4.2 4.4 V tLPC-HIGH Debounce Time for Disable SR Gate 1 s RES Section VRES-EN Threshold Voltage of VRES to Enable SR MOSFET 0.60 0.75 0.90 V tRES-LOW Debounce Time to Disable RES Function 1 2 µs VRES-CLAMP-H Higher Clamp Voltage(3) 6 V KRES-DROP RES Dropping Protection Ratio within One Cycle 90 % tRES-DROP Debounce Time for RES Voltage-Drop Protection 1.5 µs Internal Timing Section tCT Linear Operation Range of CT VLPC=1.5 V 27 30 33 s VLPC-OP Linear Operation Range of LPC to Charge CT VDD<5 V 0.8 3.4 V VDD>5 V 0.8 4.0 V VRES-OP Linear Operation Range of RES to Discharge CT VDD<5 V 0.8 3.4 V VDD>5 V 0.8 4.0 V RatioLPC-RES Ratio Between LPC and RES 4.65 5.00 5.35 tLPC-EN Minimum LPC Time to Enable SR Switching, VLPC-HIGH>VLPC-EN 0.9 1.1 1.3 µs tgate-limit ton-SR(n+1)< tgate-limitx ton-SR(n) 105 120 % Green Section tGREEN-OFF CT Capacitor tDIS Time to Leave Green Mode fS=65 kHz 4.60 5.35 6.10 µs tGREEN-ON CT Capacitor tDIS Time to Enter Green Mode fS=65 kHz 4.25 4.80 5.35 µs tGREEN-TIME- enter Cycle Time to Enter Green Mode CT Discharge Time < tGREEN-ON 3 Times tGREEN-TIME- leave Cycle Time to Leave Green Mode CT Discharge Time > tGREEN-OFF 7 Times tGREEN-ENTER No Gate Signal to Enter Green Mode(3) 75 µs Causal Function Section tCAUSAL Once tS-PWM(n+1) > tCAUSALxtS- PWM(n), SR Stops Switching and Enter Green Mode fS=65 kHz 40 kHz 120 % tDEAD-CAUSAL SR Turn-off Dead Time by Causal Function fS=65 kHz 380 580 780 ns tDEAD-CFR Dead Time to Shrink SR ON Time CFR (Causal Function Regulator) 150 ns tDEAD-RE-CFR SR ON Time Narrowed Down Width when tDEAD-CFR Triggered 1.5 s Internal Over-Temperature Protection Section TOTP Internal Threshold Temperature for OTP(3) 140 °C TOTP-HYST Hysteresis Temperature for Internal OTP(3) 20 °C Note: 3. Guaranteed by design.
Figure 18. Typical Waveforms of Linear-Predict Timing Control in CCM and DCM/QR Flyback linear-predict timing control. to zero, the SR controller turns off the SR MOSFET.
Figure 19. Simplified Linear-Predict Block the same as inductor current discharge time ( tL.DIS). shorter than tL.DIS. It is typical to set K around 5~5.5. MOSFET is turned on , the energy is stored in L m. proportional to VIN, so VCT also increases linearly. MOSFET conducts naturally during the dead time. the SR MOSFET turns off, to prevent fault triggering. the most stringent power conservation requirements. normal operation, as shown in Figure 21.
3 Times
Figure 20. Entering Green Mode
7 Times
Figure 21. Resuming Normal Operation function can guarantee reliable operation. Figure 22. Causal Function Operation
- Since the rising edge of V LPC among switching
be terminated to prevent fault trigger. Figure 23. Fault Causal Timing Protection Figure 24. When output load changes rapidly from light Figure 24. Gate Expand Limit Protection activated to prevent overlap. Figure 25. VRES Dropping Protection
© 2015 Semiconductor Components Industries, LLC. www.onsemi.com FAN6204A • Rev. 1.1 12 FAN6204A — mWSaver™ Synchronous Rectification Controller for Flyback and Forward Freewheeling Rectification LPC Pin Open / Short Protection LPC-Open Protection: If V LPC is higher than V LPC-DIS (4.2 V) for longer than debounce time t LPC-HIGH, FAN6204A stops switching immediately and enter s Green Mode. VLPC is clamped at 6 V to avoid LPC pin damage. LPC-Short Protection: If VLPC is pulled to ground and the charging current of timing capacitor (C T) is near zero, so that SR gate is not output. RES Pin Open / Short Protection RES-Open Protection: If VRES is pulled to HIGH level, the gate signal is extremely small and FAN6204A enters Green Mode. In addition, VRES is clamped at 6 V to avoid RES pin damage. RES-Short Protection: If V RES is lower than V RES-EN (0.7 V) for longer than debounce time t RES-LOW, FAN6204A stops switching immediately and enter s Green Mode. Under-Voltage Lockout (UVLO) The power ON and OFF VDD threshold voltages are fixed at 4.8 V and 4.5 V, respectively. With an ultra-low V DD threshold voltage , FAN6204A can be used in various output voltage applications. VDD Pin Over-Voltage Protection (OVP) Over-voltage conditions are usually caused by an open feedback loop. V DD over-voltage protection prevent s damage on the SR MOSFET. When the voltage on VDD pin exceeds 2 7.5 V, the SR controller stops switching the SR MOSFET. Over-Temperature Protection (OTP) To prevent SR gate from fault trigger ing in high temperatures, internal over -temperature protection is integrated in FAN 6204A. Once the temperature is over 140°C, SR gate is disabled until the temperature drops below 120°C.
B) ALL DIMENSIONS ARE IN MILLIMETERS.
1.75 MAX
0.25 C B A
Figure 26. 8-Pin, Small Outline Package (SOP)
© 2015 Semiconductor Components Industries, LLC. www.onsemi.com FAN6204AMX • Rev. 1.1 14 FAN6204AMX —mWSaver™ Synchronous Rectification Controller for Flyback and Forward Freewheeling Rectification ON Semiconductor and the ON Semiconductor logo are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regard ing the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability arising out of the application or use of any product or ci rcuit, and specifically disclaims any and all liability, including without limitation special, cons equential or incidental damages. Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications informa tion provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “T ypicals” must be validated for each customer application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or simi lar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distr ibutors harmless against all claims, costs, damages, and expe nses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated w ith such unintended or unauthorized use, even if such claim alleges that ON Semiconductor was negligent regarding the design or man ufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor 19521 E. 32nd Pkwy, Aurora, Colorado 80011 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: orderlit@onsemi.com N. American Technical Support: 800-282-9855 Toll Free USA/Canada. Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81-3-5817-1050 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative
www.onsemi.com ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries i n the United States and/or other countries. ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property . A listing of ON Semiconductor’s product/patent ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, reg ulations and safety requirements or standards, regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the right s of others. ON Semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION N. American Technical Support: 800−282−9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81−3−5817−1050 www.onsemi.com LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor 19521 E. 32nd Pkwy, Aurora, Colorado 80011 USA Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada Email: orderlit@onsemi.com ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative © Semiconductor Components Industries, LLC