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What is FAN7930B?

This electronic component, produced by the manufacturer "Fairchild Semiconductor", performs the same function as "Critical Conduction Mode PFC Controller".


FAN7930B Datasheet PDF - Fairchild Semiconductor

Part Number FAN7930B
Description Critical Conduction Mode PFC Controller
Manufacturers Fairchild Semiconductor　
Logo Fairchild Semiconductor Logo　


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October 2010
FAN7930B
Critical Conduction Mode PFC Controller
Features
ƒ Additional OVP Detection Pin
ƒ Input Voltage Absent Detection Circuit
ƒ Maximum Switching Frequency Limitation
ƒ Internal Soft-Start and Overshoot-less Control
ƒ Internal Total Harmonic Distortion (THD) Optimizer
ƒ Precise Adjustable Output Over-Voltage Protection
ƒ Open-Feedback Protection and Disable Function
ƒ Zero Current Detector
ƒ 150μs Internal Startup Timer
ƒ MOSFET Over-Current Protection
ƒ Under-Voltage Lockout with 3.5V Hysteresis
ƒ Low Startup and Operating Current
ƒ Totem-Pole Output with High State Clamp
ƒ +500/-800mA Peak Gate Drive Current
ƒ 8-Pin Small Outline Package (SOP)
Applications
ƒ Adapter
ƒ Ballast
ƒ LCD TV, CRT TV
ƒ SMPS
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 — Design Consideration for Boundary
Conduction Mode PFC Using FAN7930
Ordering Information
Part Number
Operating
Temperature
Range
www.DataSheFetA4NU7.c9o3m0BM
FAN7930BMX
-40 to +125°C
Top Mark
Package
FAN7930B 8-Lead Small Outline Package (SOP)
Packing
Method
Rail
Tape & Reel
© 2010 Fairchild Semiconductor Corporation
FAN7930B • Rev. 1.0.2
www.fairchildsemi.com

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FAN7930B equivalent
Electrical Characteristics
VCC = 14V, TA = -40°C~+125°C, unless otherwise specified.
Symbol
Parameter
Conditions
VCC Section
VSTART Start Threshold Voltage
VSTOP Stop Threshold Voltage
HYUVLO UVLO Hysteresis
VZ Zener Voltage
VOP Recommended Operating Range
Supply Current Section
VCC Increasing
VCC Decreasing
ICC=20mA
ISTART
Startup Supply Current
IOP Operating Supply Current
IDOP Dynamic Operating Supply Current
IOPDIS
Operating Current at Disable
Error Amplifier Section
VCC=VSTART-0.2V
Output Not Switching
50kHZ, CI=1nF
VINV=0V
VREF1
ΔVREF1
ΔVREF2
IEA,BS
Voltage Feedback Input Threshold1 TA=25°C
Line Regulation
Temperature Stability of VREF1(4)
VCC=14V~20V
Input Bias Current
VINV=1V~4V
IEAS,SR Output Source Current
VINV=VREF -0.1V
IEAS,SK Output Sink Current
VINV=VREF +0.1V
VEAH
Output Upper Clamp Voltage
VINV=1V, VCS=0V
VEAZ
gm
Zero Duty Cycle Output Voltage
Transconductance(4)
Maximum On-Time Section
tON,MAX1 Maximum On-Time Programming 1 TA=25°C, VZCD=1V
tON,MAX2
Maximum On-Time Programming 2
TA=25°C,
IZCD=0.469mA
Current-Sense Section
VCS
Current Sense Input Threshold
Voltage Limit
ICS,BS
tCS,D
Input Bias Current
Current Sense Delay to Output(4)
VCS=0V~1V
dV/dt=1V/100ns, from
0V to 5V
Min.
11
7.5
3.0
20
13
90
2.465
-0.5
6.0
0.9
90
35.5
11.2
0.7
-1.0
Typ. Max. Units
12 13 V
8.5 9.5 V
3.5 4.0 V
22 24 V
20 V
120 190 µA
1.5 3.0 mA
2.5 4.0 mA
160 230 µA
2.500
0.1
20
-12
12
6.5
1.0
115
2.535
10.0
0.5
7.0
1.1
140
V
mV
mV
µA
µA
µA
V
V
µmho
41.5 47.5 µs
13.0 14.8 µs
0.8 0.9 V
-0.1 1.0 µA
350 500 ns
Continued on the following page…
www.DataSheet4U.com
© 2010 Fairchild Semiconductor Corporation
FAN7930B • Rev. 1.0.2
5
www.fairchildsemi.com


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