IC PFC CTRLR CRM/TRANSITION 8DIP

FAN7528N

Manufacturer Part NumberFAN7528N
DescriptionIC PFC CTRLR CRM/TRANSITION 8DIP
ManufacturerFairchild Semiconductor
FAN7528N datasheet
 


Specifications of FAN7528N

ModeCritical Conduction (CRM), Discontinuous (Transition)Current - Startup40µA
Voltage - Supply12 V ~ 23 VOperating Temperature-40°C ~ 125°C
Mounting TypeThrough HolePackage / Case8-DIP (0.300", 7.62mm)
Maximum Operating Temperature+ 125 CMounting StyleThrough Hole
Minimum Operating Temperature- 40 CLead Free Status / RoHS StatusLead free / RoHS Compliant
Frequency - Switching-  
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FAN7528
Dual-Output, Critical Conduction Mode PFC Controller
Features
Low Total Harmonic Distortion (THD)
Dual Output Voltage Control
Precise Adjustable Output Over-Voltage Protection
Open-Feedback Protection and Disable Function
Zero Current Detector
160µs Internal Start-up Timer
MOSFET Over-Current Protection
Under-Voltage Lockout with 3.5V Hysteresis
Low Start-up (40µA) and Operating Current (1.5mA)
Totem-Pole Output with High State Clamp
±400mA Peak Gate Drive Current
8-Pin DIP or 8-Pin SOP
Applications
Adapter
Related Application Notes
AN-6012: Design of Power Factor Correction Circuit
Using FAN7528
Ordering Information
Operating Temp.
Part Number
Range
FAN7528N
-40°C to +125°C
FAN7528M
-40°C to +125°C
FAN7528MX
-40°C to +125°C
© 2005 Fairchild Semiconductor Corporation
FAN7528 Rev. 1.0.6
Description
The FAN7528 is an active power factor correction (PFC)
controller for boost PFC applications that operates in
critical conduction mode (CRM). It uses voltage mode
PWM that compares an internal ramp signal with the
error amplifier output to generate MOSFET turn-off sig-
nal. Because the voltage mode CRM PFC controller does
not need the rectified AC line voltage information, it can
save the power loss of the input voltage sensing network
necessary for the current mode CRM PFC controller.
The FAN7528 provides the dual-output voltage control
function without the AC line voltage sensing for adapter
applications. It changes the PFC output voltage accord-
ing to the AC line voltage.
It provides protection functions such as over-voltage pro-
tection, open-feedback protection, over-current protec-
tion, and under-voltage lockout protection. The FAN7528
can be disabled if the INV pin voltage is lower than 0.45V
and the operating current decreases to 65µA. Using a
new variable on-time control method, THD is lower than
the conventional CRM boost PFC ICs.
Pb-Free
Package
Packing Method
Yes
8-DIP
Yes
8-SOP
Yes
8-SOP
February 2007
Marking
Code
Rail
FAN7528
Rail
FAN7528
Tape & Reel
FAN7528
www.fairchildsemi.com

FAN7528N Summary of contents

  • Page 1

    ... Applications Adapter Related Application Notes AN-6012: Design of Power Factor Correction Circuit Using FAN7528 Ordering Information Operating Temp. Part Number Range FAN7528N -40°C to +125°C FAN7528M -40°C to +125°C FAN7528MX -40°C to +125°C © 2005 Fairchild Semiconductor Corporation FAN7528 Rev. 1.0.6 Description ...

  • Page 2

    ... ZCD 5 6.7V 1.4V 1. 40k 8pF 0.8V Comparator Ramp Signal 1V Offset Sawtooth MOT 3 Generator 6 GND © 2005 Fairchild Semiconductor Corporation FAN7528 Rev. 1.0 AUX V AUX R R2 ZCD ZCD V CC FAN7528 MOT COMP R1 GND Figure 1. Typical Boost PFC Application 2.5V UVLO Internal ...

  • Page 3

    ... Pin # Name 1 INV 2 COMP 3 MOT ZCD 6 GND 7 OUT © 2005 Fairchild Semiconductor Corporation FAN7528 Rev. 1.0.6 V OUT GND INV COMP MOT FAN7528 Rev. 1.00 Figure 3. Pin Configuration (Top View) This pin is the inverting input of the error amplifier. The output voltage of the boost PFC converter should be resistively divided to 2 ...

  • Page 4

    ... STG Human Body Model ESD Machine Model Thermal Impedance Symbol θ Thermal Resistance, Junction-to-Ambient JA Note: 1. Regarding the test environment and PCB type, please refer to JESD51-2 and JESD51-10. © 2005 Fairchild Semiconductor Corporation FAN7528 Rev. 1.0.6 = 25°C unless otherwise specified. A Parameter > < -0. ...

  • Page 5

    ... Maximum On-time Programming ON Current Sense Section Current Sense Input Threshold V CS(limit) Voltage Limit I Input Bias Current b(cs) t Current Sense Delay to Output d(cs) © 2005 Fairchild Semiconductor Corporation FAN7528 Rev. 1.0.6 Condition V increasing CC V decreasing TH(start) Output no switching 50kHz, C =1nF ...

  • Page 6

    ... V OVP Threshold Voltage OVP HY(ovp) OVP Hysteresis Enable Section V Enable Threshold Voltage TH(en) HY(en) Enable Hysteresis Note: 1. These parameters, although guaranteed by design, are not tested in production. © 2005 Fairchild Semiconductor Corporation FAN7528 Rev. 1.0.6 (Continued) Condition (1) ( 3mA det I = -3mA det V = 1V~5V ...

  • Page 7

    ... Temperature [°C] Figure 8. Operating Supply Current vs. Temp. © 2005 Fairchild Semiconductor Corporation FAN7528 Rev. 1.0.6 9.2 8.8 8.4 8.0 7.6 -60 -40 - 100 120 140 Temperature [°C] Figure 5. Stop Threshold Voltage vs. Temp. ...

  • Page 8

    ... Temperature [°C] Figure 12. V ref2 -6 -9 -12 -15 -18 -60 -40 - 100 120 140 Temperature [°C] Figure 14. Error Amp. Source Current vs. Temp. © 2005 Fairchild Semiconductor Corporation FAN7528 Rev. 1.0.6 (Continued) 2.56 2.54 2.52 2.50 2.48 2.46 2.44 0.4 0.2 0.0 -0.2 -0 ...

  • Page 9

    ... Temperature [°C] Figure 18. Output Select Threshold vs. Temp -60 -40 - 100 120 140 Temperature [°C] Figure 20. Maximum On-Time vs. Temp. © 2005 Fairchild Semiconductor Corporation FAN7528 Rev. 1.0.6 (Continued) 1.3 1.2 1.1 1.0 0.9 0.8 0.7 -60 -40 - 100 120 140 Temperature [°C] Figure 17 ...

  • Page 10

    ... Figure 24. ZCD Input Low Clamp vs. Temp. 12.5 12.0 11.5 11.0 10.5 10.0 9.5 -60 -40 - 100 120 140 Temperature [°C] Figure 26. Output Voltage High vs. Temp. © 2005 Fairchild Semiconductor Corporation FAN7528 Rev. 1.0.6 (Continued) 7.4 7.2 7.0 6.8 6.6 6.4 6.2 6.0 -60 -40 - 100 120 140 Temperature [° ...

  • Page 11

    ... Temperature [°C] Figure 30. Restart Timer Delay vs. Temp. 0.14 0.12 0.10 0.08 0.06 -60 -40 - 100 120 140 Temperature [°C] Figure 32. OVP Hysteresis vs. Temp. © 2005 Fairchild Semiconductor Corporation FAN7528 Rev. 1.0.6 (Continued) 1.0 0.8 0.6 0.4 0.2 0.0 -60 -40 - 100 120 140 Temperature [° ...

  • Page 12

    ... Typical Performance Characteristics © 2005 Fairchild Semiconductor Corporation FAN7528 Rev. 1.0.6 (Continued) 0.14 0.12 0.10 0.08 0.06 -60 -40 - 100 120 140 Temperature [°C] Figure 34. Enable Hysteresis vs. Temp. 12 www.fairchildsemi.com ...

  • Page 13

    ... Error Amp 1.5V/2. COMP Figure 35. Error Amplifier Block © 2005 Fairchild Semiconductor Corporation FAN7528 Rev. 1.0.6 1.2 Over-Voltage Protection Function The control speed of the PFC converter is very slow; therefore, the over-voltage protection (OVP) of the out- put voltage is very important. The FAN7528 provides a precise OVP function that shuts down the drive circuit when the INV pin voltage exceeds 2 ...

  • Page 14

    ... Generator 1V Error Amp Output Figure 37. Sawtooth Generator Block © 2005 Fairchild Semiconductor Corporation FAN7528 Rev. 1.0.6 4. Over-Current Protection Block The MOSFET current is sensed using an external sens- ing resistor for the over-current protection. If the CS pin voltage is higher than 0.8V, the over-current protection comparator generates a protection signal ...

  • Page 15

    ... Diode D4 is used to prevent IC malfunction that can happen if the CS pin voltage is lower than -0.3V. Important components for low THD are R2, R5, and C11. 1. Schematic BD C5 NTC LF1 INPUT © 2005 Fairchild Semiconductor Corporation FAN7528 Rev. 1.0.6 Input voltage Universal input 100W (90~264 Vac AUX C10 ZD1 ...

  • Page 16

    ... Vcc Outer Insulation: Polyester Tape t = 0.050mm, 4 Layers Air Gap: 0.6mm for each leg 4. Electrical Characteristics Inductance 5. Core & Bobbin Core: EI 3026 Bobbin: EI3026 2 Ae(mm ): 111 © 2005 Fairchild Semiconductor Corporation FAN7528 Rev. 1.0 Vcc FAN7528 Rev. 1.00 Figure 40. Inductor Schematic Diagram ...

  • Page 17

    ... Capacitor C1 150nF/275VAC C2 330nF/275VAC C3 2.2nF/3kV C4 2.2nF/3kV C5 150nF/630V C6 47uF/25V C7 47nF/50V C8 220nF C9 100µF/450V C10 12nF/100V C11 47pF/50V © 2005 Fairchild Semiconductor Corporation FAN7528 Rev. 1.0.6 Note Part T1 Q1 1/4W 1/4W 1/2W D1 1/2W D2 1/4W D3 1/4W D4 1/2W ZD1 1/4W 1/4W 1/4W BD 1/4W Box Capacitor ...

  • Page 18

    ... Signal Ground 8. Performance Data 100W PF THD 50W PF THD © 2005 Fairchild Semiconductor Corporation FAN7528 Rev. 1.0.6 Separate the power ground and the signal ground Place the output voltage sensing resistors Figure 41. PCB Layout Considerations for FAN7528 90 Vac 110 Vac 220 Vac ...

  • Page 19

    ... Mechanical Dimensions 8-DIP Dimensions are in millimeters unless otherwise noted. © 2005 Fairchild Semiconductor Corporation FAN7528 Rev. 1.0.6 Figure 42. 8-Lead Dual In-Line Package (DIP) 19 www.fairchildsemi.com ...

  • Page 20

    ... Mechanical Dimensions 8-SOP Dimensions are in millimeters unless otherwise noted. © 2005 Fairchild Semiconductor Corporation FAN7528 Rev. 1.0.6 Figure 43. 8-Lead Small Outline Package (SOP) 20 www.fairchildsemi.com ...

  • Page 21

    ... Fairchild Semiconductor Corporation FAN7528 Rev. 1.0.6 21 www.fairchildsemi.com ...