FAN7930BMX Fairchild Semiconductor, FAN7930BMX Datasheet

Power Factor Correction ICs Critical Conduction Mode PFC Controller

FAN7930BMX

Manufacturer Part Number
FAN7930BMX
Description
Power Factor Correction ICs Critical Conduction Mode PFC Controller
Manufacturer
Fairchild Semiconductor
Datasheet

Specifications of FAN7930BMX

Switching Frequency
300 KHz
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Package / Case
SOP-8
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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© 2010 Fairchild Semiconductor Corporation
FAN7930B • Rev. 1.0.2
FAN7930B
Critical Conduction Mode PFC Controller
Features
Applications
Ordering Information
Part Number
FAN7930BMX
FAN7930BM
Additional OVP Detection Pin
Input Voltage Absent Detection Circuit
Maximum Switching Frequency Limitation
Internal Soft-Start and Overshoot-less Control
Internal Total Harmonic Distortion (THD) Optimizer
Precise Adjustable Output Over-Voltage Protection
Open-Feedback Protection and Disable Function
Zero Current Detector
150μs Internal Startup Timer
MOSFET Over-Current Protection
Under-Voltage Lockout with 3.5V Hysteresis
Low Startup and Operating Current
Totem-Pole Output with High State Clamp
+500/-800mA Peak Gate Drive Current
8-Pin Small Outline Package (SOP)
Adapter
Ballast
LCD TV, CRT TV
SMPS
Temperature
-40 to +125°C
Operating
Range
Top Mark
FAN7930B
8-Lead Small Outline Package (SOP)
Description
The FAN7930B is an active power factor correction
(PFC) controller for boost PFC applications that
operate in critical conduction mode (CRM). It uses a
voltage-mode PWM that compares an internal ramp
signal with the error amplifier output to generate a
MOSFET turn-off signal. Because the voltage-mode
CRM PFC controller does not need rectified AC line
voltage information, it saves the power loss of an input
voltage sensing network necessary for a current-mode
CRM PFC controller.
FAN7930B provides over-voltage protection, open-
feedback protection, over-current protection, input-
voltage-absent detection, and under-voltage lockout
protection. The additional OVP pin can be used to shut
down the boost power stage when output voltage
exceeds OVP level due to the resistors that are
connected at INV pin are damaged. The FAN7930B can
be disabled if the INV pin voltage is lower than 0.45V
and the operating current decreases to a very low level.
Using a new variable on-time control method, THD is
lower than the conventional CRM boost PFC ICs.
Related Resources
AN-8035
Conduction Mode PFC Using FAN7930
Package
Design
Consideration
October 2010
Tape & Reel
for
Packing
www.fairchildsemi.com
Method
Rail
Boundary

Related parts for FAN7930BMX

FAN7930BMX Summary of contents

Page 1

... Ordering Information Operating Part Number Temperature Range FAN7930BM -40 to +125°C FAN7930BMX © 2010 Fairchild Semiconductor Corporation FAN7930B • Rev. 1.0.2 Description The FAN7930B is an active power factor correction (PFC) controller for boost PFC applications that operate in critical conduction mode (CRM). It uses a ...

Page 2

... Application Diagram Internal Block Diagram © 2010 Fairchild Semiconductor Corporation FAN7930B • Rev. 1.0.2 Figure 1. Typical Boost PFC Application Figure 2. Functional Block Diagram 2 www.fairchildsemi.com ...

Page 3

... OUT 800mA, respectively. For proper operation, the stray inductance in the gate driving path must be minimized This is the IC supply pin. IC current and MOSFET drive current are supplied using this pin. CC © 2010 Fairchild Semiconductor Corporation FAN7930B • Rev. 1.0.2 V OUT GND ZCD CC ...

Page 4

... In case of DC input, acceptable input range is -0.3V~6V: within 100ns -10V~6V is acceptable, but electrical specifications are not guaranteed during such a short time. Thermal Impedance Symbol Θ Thermal Resistance, Junction-to-Ambient JA Note: 3. Regarding the test environment and PCB type, please refer to JESD51-2 and JESD51-10. © 2010 Fairchild Semiconductor Corporation FAN7930B • Rev. 1.0.2 Parameter > <-0. (1) ...

Page 5

... Maximum On-Time Programming 1 T ON,MAX1 t Maximum On-Time Programming 2 ON,MAX2 Current-Sense Section Current Sense Input Threshold V CS Voltage Limit I Input Bias Current CS,BS t Current Sense Delay to Output CS,D © 2010 Fairchild Semiconductor Corporation FAN7930B • Rev. 1.0.2 Conditions V Increasing CC V Decreasing CC I =20mA -0.2V CC ...

Page 6

... Enable Threshold Voltage EN HY Enable Hysteresis EN T Thermal Shutdown Temperature SD T Hysteresis Temperature of TSD HYS Note: 4. These parameters, although guaranteed by design, are not production tested. © 2010 Fairchild Semiconductor Corporation FAN7930B • Rev. 1.0.2 Conditions (4) I =3mA DET I = -3mA DET V =1V~5V ZCD (4) T =25° ...

Page 7

... FAN7930 RDY Pin Integrated OVP Pin None Control Range None Compensation © 2010 Fairchild Semiconductor Corporation FAN7930B • Rev. 1.0.2 FAN7930B FAN7930B Advantages No External Circuit for additional OVP Integrated Reduction of Power Loss and BOM Cost Caused by additional OVP Circuit Abnormal CCM Operation Prohibited ...

Page 8

... Typical Performance Characteristics Figure 4. Voltage Feedback Input Threshold vs. T REF1 Figure 6. Stop Threshold Voltage (V Figure 8. Operating Supply Current (I © 2010 Fairchild Semiconductor Corporation FAN7930B • Rev. 1.0.2 Figure vs. T Figure 7. STOP A ) vs. T Figure Start Threshold Voltage (V ) vs. T START Startup Supply Current ( ...

Page 9

... Typical Performance Characteristics Figure 10. Zero Duty Cycle Output Voltage (V vs Figure 12. Maximum On-Time Program Figure 14. Input High Clamp Voltage (V vs © 2010 Fairchild Semiconductor Corporation FAN7930B • Rev. 1.0.2 ) Figure 11. Maximum On-Time Program 1 (t EAZ ) Figure 13. Current Sense Input Threshold Voltage ON,MAX2 ...

Page 10

... Typical Performance Characteristics Figure 16. Output Voltage High (V Figure 18. Restart Timer Delay (t Figure 20. Output Saturation Voltage (V vs © 2010 Fairchild Semiconductor Corporation FAN7930B • Rev. 1.0.2 ) vs. T Figure 17 vs. T Figure 19. OVP Threshold at OVP Pin (V RST A ) Figure 21. OVP Threshold Voltage (V RDY,SAT 10 Output Voltage Low ( ...

Page 11

... IC. The IC operating current decreases to reduce power consumption if the IC is disabled the timing chart of the internal circuit near the INV pin when rated PFC output voltage is assumed at 390V supply voltage is 15V. © 2010 Fairchild Semiconductor Corporation FAN7930B • Rev. 1.0 PFC CC exceeds V ...

Page 12

... AUX = ⋅ − AUX PFCOUT AC T IND © 2010 Fairchild Semiconductor Corporation FAN7930B • Rev. 1.0.2 where are boost inductor turns and auxiliary winding turns AUX respectively output voltage from the PFC converter. OUT_PFC supply voltage falls CC again and START ...

Page 13

... FAN7930B waits for another ZCD signal. This slightly degrades the power factor performance at light load and high input voltage. © 2010 Fairchild Semiconductor Corporation FAN7930B • Rev. 1.0.2 Figure 30. Maximum Switching Frequency Limit Operation 6 ...

Page 14

... As a result also raised gradually and MOSFET COMP turn-on time increases smoothly. This reduces voltage and current stress on the power switch during startup. © 2010 Fairchild Semiconductor Corporation FAN7930B • Rev. 1.0 =12V START ...

Page 15

... Near Input Voltage Peak Figure 38. Input and Output Current Near Input Voltage Peak Zero Cross © 2010 Fairchild Semiconductor Corporation FAN7930B • Rev. 1.0.2 To improve this, lengthened turn-on time near the zero cross region is a well-known technique, though the method may be different from company to company and may be proprietary ...

Page 16

... AC input is live again. Soft-start manages the turn-on time for smooth operation when it detects AC input is applied again and applies less voltage and current stress on startup. Figure 41. Operation without Input Voltage Absent Circuit © 2010 Fairchild Semiconductor Corporation FAN7930B • Rev. 1.0.2 V OUT V IN Though V ...

Page 17

... Switching current sense path should not share with another path to avoid interference. Some additional components may be needed to reduce the noise level applied to the CS pin. © 2010 Fairchild Semiconductor Corporation FAN7930B • Rev. 1.0 stabilizing capacitor for V close as possible to the V CC difficult, place the SMD capacitor as close to the corresponding pins as possible ...

Page 18

... Quick charge diode (D106) can be eliminated if output diode inrush current capability is enough. Thought D106, system operation is normal due to the controller’s highly reliable protection features. 1. Schematic © 2010 Fairchild Semiconductor Corporation FAN7930B • Rev. 1.0.2 Input Voltage Device ...

Page 19

... AUX Top Insulation: Polyester Tape t = 0.025mm, 4 Layers 4. Electrical Characteristics Inductance 5. Core & Bobbin Core: EER3124, Samhwa (PL-7) (Ae=97.9mm Bobbin: EER3124 © 2010 Fairchild Semiconductor Corporation FAN7930B • Rev. 1.0.2 Transformer Schematic Diagram of FAN7930B Wire Turns 0.1φ× → 4 0.3φ ...

Page 20

... C107 33µF/50V C108 220nF/50V C109 47nF/50V C110,116 1nF/50V C112 47nF/50V C111 220µF/450V C114 2.2nF/450V C115 2.2nF/450V © 2010 Fairchild Semiconductor Corporation FAN7930B • Rev. 1.0.2 Note Part # 1W Q101 1/2W 1W D101 1/4W D102 1/4W D103 1/4W D104 1/4W D105 1/4W ...

Page 21

... Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’ ...

Page 22

... Fairchild Semiconductor Corporation FAN7930B • Rev. 1.0.2 22 www.fairchildsemi.com ...

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