DATA SHEET www.onsemi.com Critical Conduction Mode PFC Controller SOIC8 CASE 751EB FAN7930C Description MARKING DIAGRAM The FAN7930C is an active power factor correction (PFC) controller for boost PFC applications that operate in critical conduction mode (CRM). It uses a voltagemode PWM that compares an internal ramp signal with the error amplifier output to generate a 7930C MOSFET turn off signal. Because the voltagemode CRM PFC ALYW controller does not need rectified AC line voltage information, it saves the power loss of an input voltagesensing network necessary for a currentmode CRM PFC controller. FAN7930C provides over voltage protection (OVP), 7930C = Device Code open feedback protection, over current protection (OCP), A = Assembly Site inputvoltageabsent detection, and undervoltage lockout protection L = Wafer Lot Number YW = Assembly Start Week (UVLO). The PFCready pin can be used to trigger other power stages when PFC output voltage reaches the proper level with hysteresis. The FAN7930C can be disabled if the INV pin voltage is lower than 0.45 V and the operating current decreases to a very low level. Using a ORDERING INFORMATION new variable ontime control method, total harmonic distortion See detailed ordering and shipping information on page X of (THD) is lower than in conventional CRM boost PFC ICs. this data sheet. Features PFCReady Signal V Absent Detection IN Maximum Switching Frequency Limitation Internal SoftStart and Startup without Overshoot Internal Total Harmonic Distortion (THD) Optimizer Precise Adjustable Output OverVoltage Protection OpenFeedback Protection and Disable Function ZeroCurrent Detector (ZCD) 150 s Internal Startup Timer MOSFET OverCurrent Protection (OCP) UnderVoltage Lockout with 3.5 V Hysteresis Low Startup and Operating Current TotemPole Output with High State Clamp +500/800 mA Peak Gate Drive Current 8Pin, Small Outline Package (SOP) Applications Adapter Ballast LCD TV, CRT TV SMPS Related Resources AN8035/D Design Consideration for Boundary Conduction Mode PFC Using FAN7930 Semiconductor Components Industries, LLC, 2010 1 Publication Order Number: November, 2021 Rev. 4 FAN7930C/DFAN7930C ORDERING INFORMATION Part Number Operating Temperature Range Top Mark Package Shipping FAN7930CMXG 40 to +125C 7930C 8Lead, Small Outline Package (SOP) 2500 / Tape & Reel (PbFree) For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. APPLICATION DIAGRAM DC OUTPUT Vcc FAN7930C 8 VCC 7 Out + 5 line filter ZCD 4 + CS 3 COMP 1 INV 2 RDY AC INPUT GND PFC ready 6 Figure 1. Typical Boost PFC Application INTERNAL BLOCK DIAGRAM VCC H:open V 2.5 V REF REF 8 VCC V CC V Z Internal VBIAS reset Bias + VTH(S/S) 8.5 12 ZCD 5 V CC + Restart Gate Timer V TH(ZCD) 7 OUT Driver f MAX V limit O(MAX) THD S Q Optimized Control Range Sawtooth + Compensation Generator R Q 40 k Startup without + 4 CS Overshoot 8 pF INV 1 VCS LIM V VREF REF 6 GND + Stair Step Clamp Circuit reset V Absent IN COMP 3 disable disable Thermal Shutdown 0.35 0.45 2.5 2.675 + RDY 2 INV open V BIAS OVP UVLO 2.051 2.240 Figure 2. Functional Block Diagram www.onsemi.com 2 Clamp Circuit