FAN7528 Fairchild Semiconductor, FAN7528 Datasheet
FAN7528
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FAN7528 Summary of contents
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... Fairchild Semiconductor Corporation FAN7528 Rev. 1.0.1 Description The FAN7528 is an active power factor correction (PFC) con- troller for boost PFC applications which operates in the critical conduction mode (CRM). It uses the voltage mode PWM that compares an internal ramp signal with the error amplifier output to generate MOSFET turn-off signal ...
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... Internal Block Diagram Vcc 8 12V ZCD 5 6.7V 1.4V 1. 40k 8pF 0.8V Comparator 1V Saw Tooth MOT 3 Generator 6 GND Figure 2. Functional Block Diagram of FAN7528 FAN7528 Rev. 1.0 AUX V AUX R ZCD R2 ZCD Vcc FAN7528 MOT COMP R1 GND Figure 1. Typical Boost PFC Application 2.5V Ref UVLO Internal Bias Disable 8 ...
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... Pin Definitions Pin Number Pin Name 1 INV 2 COMP 3 MOT ZCD 6 GND 7 OUT 8 Vcc FAN7528 Rev. 1.0.1 Vcc OUT GND INV COMP MOT Figure 3. Pin Configuration (Top View) Pin Function Description This pin is the inverting input of the error amplifier. The output voltage of the boost PFC converter should be resistively divided to 2 ...
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... Storage Temperature Range ESD Capability, HBM Model (All pins except Vcc) ESD Capability, Machine Model Thermal Impedance Parameter Thermal Resistance, Junction to Ambient Note: 1. Regarding the test environment and PCB type, please refer to JESD51-2 and JESD51-10. FAN7528 Rev. 1.0.1 Symbol Vcc Iclamp Idet ...
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... Output Voltage Reset Threshold MAXIMUM ON-TIME SECTION Maximum On-time Voltage Maximum On-time Programming CURRENT SENSE SECTION Current Sense Input Threshold Voltage Limit Input Bias Current (1) Current Sense Delay to Output FAN7528 Rev. 1.0.1 Symbol Condition Vth(start) Vcc increasing Vth(stop) Vcc decreasing HY(uvlo) - Ist Vcc = Vth(start ...
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... RESTART TIMER SECTION Restart Timer Delay OVER VOLTAGE PROTECTION SECTION OVP Threshold Voltage OVP Hysteresis ENABLE SECTION Enable Threshold Voltage Enable Hysteresis Note: 1. These parameters, although guaranteed by design, are not tested in mass production. FAN7528 Rev. 1.0.1 Symbol Condition Vth - (ZCD (ZCD) Vclamp(h) ...
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... Temperature[ Figure 6. UVLO Hysteresis vs. Temp. Operating Supply Current 3.0 2.5 2.0 1.5 1.0 0.5 0.0 -60 -40 - Temperature[ Figure 8. Operating Supply Current vs. Temp. FAN7528 Rev. 1.0.1 9.2 8.8 8.4 8.0 7.6 - 100 120 140 ℃ ] Figure 5. Stop Threshold Voltage vs. Temp 100 120 140 -60 ℃ ...
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... Figure 10. Icc at Disable vs. Temp. Voltage Feedback Input Threshold2 1.54 1.52 1.50 1.48 1.46 -60 -40 - Temperature[ Figure 12. Vref2 vs. Temp. Output Source Current -6 -9 -12 -15 -18 -60 -40 - Temperature[ Figure 14. Error Amp. Source Current vs. Temp. FAN7528 Rev. 1.0.1 2.56 2.54 2.52 2.50 2.48 2.46 2. 100 120 140 -60 ℃ ] 0.4 0.2 0.0 -0.2 -0 100 120 140 -60 ℃ ] Figure 13 ...
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... Output Voltage Selection Threshold 1.36 1.34 1.32 1.30 1.28 1.26 1.24 -60 -40 - Temperature[ Figure 18. Output Select Threshold vs. Temp. Maximum On-Time Programming -60 -40 - Temperature[ Figure 20. Maximum On-time vs. Temp. FAN7528 Rev. 1.0.1 1.3 1.2 1.1 1.0 0.9 0.8 0.7 - 100 120 140 ℃ ] Figure 17. Zero Duty Output Voltage vs. Temp. 1.04 1.02 1.00 0.98 0. 100 120 140 -60 ℃ ] Figure 19 ...
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... Input Low Clamp Voltage 1.0 0.8 0.6 0.4 0.2 0.0 -60 -40 - Temperature[ Figure 24. ZCD Input Low Clamp vs. Temp. Output Voltage High 12.5 12.0 11.5 11.0 10.5 10.0 9.5 -60 -40 - Temperature[ Figure 26. Output Voltage High vs. Temp. FAN7528 Rev. 1.0.1 7.4 7.2 7.0 6.8 6.6 6.4 6.2 6 100 120 140 -60 ℃ ] Figure 23. ZCD Input High Clamp vs. Temp. 0.8 0.4 0.0 -0.4 -0 100 120 140 -60 ℃ ] Figure 25 ...
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... Temperature[ Figure 30. Restart Timer Delay vs. Temp. OVP Hysteresis 0.14 0.12 0.10 0.08 0.06 -60 -40 - Temperature[ Figure 32. OVP Hysteresis vs. Temp. FAN7528 Rev. 1.0.1 1.0 0.8 0.6 0.4 0.2 0 100 120 140 -60 ℃ ] Figure 29. Output Voltage when UVLO vs. Temp. 2.74 2.72 2.70 2.68 2.66 2.64 2.62 2.60 - 100 120 140 ℃ ...
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... Typical Performance Characteristics (Continued) Enable Hysteresis 0.14 0.12 0.10 0.08 0.06 -60 -40 - Temperature[ Figure 34. Enable Hysteresis vs. Temp. FAN7528 Rev. 1.0 100 120 140 ℃ www.fairchildsemi.com ...
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... The control speed of the PFC converter is very slow, therefore the over voltage protection of the output voltage is very impor- tant. The FAN7528 provides a precise OVP function that shuts down the drive circuit when the INV pin voltage exceeds 2.66V,. and there is 0.11V hysteresis. ...
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... Comparator Figure 38. Over current protection block 5. Switch Drive Block The FAN7528 contains a single totem-pole output stage designed for a direct drive of power MOSFET. The drive output is capable 400mA peak current with a typical rise and fall time of 50ns with 1nF load. The output voltage is clamped to be 13V to protect MOSFET gate even if the Vcc voltage is higher than 20V ...
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... Diode D4 is used to prevent IC malfunction that can happen if the CS pin voltage is lower than -0.3V. • Important Component s for low THD are R2, R5 and C11. 1. Schematic BD C5 NTC LF1 INPUT FAN7528 Rev. 1.0.1 Input voltage 100W Universal input (90~264Vac AUX C10 ...
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... Np Outer Insulation: Polyester Tape t = 0.050mm, 4Layers Air Gap: 0.6mm for each leg 4.Electrical Characteristics Inductance 5. Core & Bobbin • Core : EI 3026 • Bobbin : EI3026 • Ae(mm2) : 111 FAN7528 Rev. 1.0 Vcc Figure 40. Inductor Schematic Diagram Wire Turns φ ...
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... R8 10k R9 10k R10 2M R11 12.9k Capacitor C1 150nF/275VAC C2 330nF/275VAC C3 2.2nF/3kV C4 2.2nF/3kV C5 100nF/630V C6 47uF/25V C7 220nF/50V C8 1uF C9 100uF/450V C10 12nF/100V C11 56pF/50V FAN7528 Rev. 1.0.1 Note Part T1 Q1 1/4W 1/4W 1/2W D1 1/4W D2 1/4W D3 1/4W D4 1/2W ZD1 1/4W 1/4W 1/4W BD 1/4W LF1 Box Capacitor Box Capacitor Ceramic Capacitor IC1 Ceramic Capacitor Film Capacitor Electrolytic Capacitor V1 Ceramic Capacitor ...
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... Layout Power Ground Signal Ground Figure 41. PCB Layout Considerations for FAN7528 8. Performance Data 90Vac PF 0.999 100W THD 3.5% PF 0.997 50W THD 5.8% FAN7528 Rev. 1.0.1 Separate the power ground and the signal ground Place the output voltage sensing resistors close to IC 110Vac 220Vac 264Vac ...
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... Mechanical Dimensions Package FAN7528 Rev. 1.0.1 19 Unit : mm www.fairchildsemi.com ...
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... Mechanical Dimensions Package FAN7528 Rev. 1.0.1 20 Unit : mm www.fairchildsemi.com ...
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... PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Advance Information Preliminary No Identification Needed Obsolete FAN7528 Rev. 1.0.1 PowerSaver™ ISOPLANAR™ PowerTrench ® LittleFET™ QFET ® MICROCOUPLER™ MicroFET™ QS™ QT Optoelectronics™ ...