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부품번호 | FAN6920MR 기능 |
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기능 | Integrated Critical-Mode PFC and Quasi-Resonant Current-Mode PWM Controller | ||
제조업체 | Fairchild Semiconductor | ||
로고 | |||
전체 24 페이지수
April 2011
FAN6920MR
Integrated Critical-Mode PFC and Quasi-Resonant
Current-Mode PWM Controller
Features
Integrated PFC and Flyback Controller
Critical-Mode PFC Controller
Zero-Current Detection for PFC Stage
Quasi-Resonant Operation for PWM Stage
Internal Minimum 5µs tOFF for QR PWM Stage
Internal 5ms Soft-Start for PWM
Brownout Protection
High / Low Line Over-Power Compensation
Auto-Recovery Over-Current Protection
Auto-Recovery Open-Loop Protection
Externally Auto-Recovery Triggering (RT Pin)
Adjustable Over-Temperature Protection
VDD Pin and Output Voltage OVP (Auto-Recovery)
Internal Over-Temperature Shutdown (140°C)
Applications
AC/DC NB Adapters
Open-Frame SMPS
Battery Charger
Description
The highly integrated FAN6920MR combines Power
Factor Correction (PFC) controller and quasi-resonant
PWM controller. Integration provides cost-effective
design and reduces external components.
For PFC, FAN6920MR uses a controlled on-time
technique to provide a regulated DC output voltage and
to perform natural power-factor correction. With an
innovative THD optimizer, FAN6920MR can reduce
input current distortion at zero-crossing duration to
improve THD performance.
For PWM, FAN6920MR provides several functions to
enhance the power system performance: valley
detection, green-mode operation, and high / low line
over-power compensation. Protection functions include
secondary-side open-loop and over-current with auto-
recovery protection; external auto-recovery triggering;
adjustable over-temperature protection by RT pin; and
external NTC resistor, internal over-temperature
shutdown, VDD pin OVP, and DET pin over-voltage for
output OVP, and brown-in / out for AC input voltage
UVP.
The FAN6920MR controller is available in a 16-pin
small-outline package (SOP).
Ordering Information
www.DataSheet4U.com
Part Number OLP Mode
FAN6920MRMY Recovery
Operating
Temperature Range
-40°C to +105°C
Package
16-Pin Small Outline Package (SOP)
Packing
Method
Tape & Reel
© 2010 Fairchild Semiconductor Corporation
FAN6920MR • Rev. 1.0.3
www.fairchildsemi.com
Marking Information
16
ZXYTT
FAN6920FO
TPM
1
- Fairchild Logo
Z - Plant Code
X - Year Code
Y - Week Code
TT - Die Run Code
F - Frequency (M = Low, H = High Level)
O - OLP Mode (L = Latch, R = Recovery)
T - Package Type (M = SOP)
P - Y = Green Compound
M - Manufacturing Flow Code
Figure 3. Marking Diagram
Pin Configuration
RANGE
COMP
INV
CSPFC
CSPWM
OPFC
VDD
OPWM
1
2
3
4
5
6
7
8
16 HV
15 N.C.
14 ZCD
13 VIN
12 RT
11 FB
10 DET
9 GND
Figure 4. Pin Configuration
Pin Definitions
Pin # Name Description
The RANGE pin’s impedance changes according to VIN pin voltage level. When the input voltage
1 RANGE detected by the VIN pin is higher than a threshold voltage, it sets to low impedance; whereas it
sets to high impedance if input voltage is at a high level.
Output pin of the error amplifier. It is a transconductance-type error amplifier for PFC output
2
COMP
voltage feedback. Proprietary multi-vector current is built-in to this amplifier; therefore, the
compensation for PFC voltage feedback loop allows a simple compensation circuit between this
pin and GND.
Inverting input of the error amplifier. This pin is used to receive PFC voltage level by a voltage
3 INV divider and provides PFC output over- and under-voltage protections. This pin also controls the
PWM startup. Once the FAN6920MR is turned on and VINV exceeds in 2.3V, PWM starts.
Input to the PFC over-current protection comparator that provides cycle-by-cycle current limiting
4 CSPFC protection. When the sensed voltage across the PFC current-sensing resistor reaches the internal
threshold (0.82V typical), the PFC switch is turned off to activate cycle-by-cycle current limiting.
www.DataSheet4U.com Input to the comparator of the PWM over-current protection and performs PWM current-mode
control with FB pin voltage. A resistor is used to sense the switching current of the PWM switch
5 CSPWM and the sensing voltage is applied to the CSPWM pin for the cycle-by-cycle current limit, current-
mode control, and high / low line over-power compensation according to DET pin source current
during PWM tON time.
Continued on the following page…
© 2010 Fairchild Semiconductor Corporation
FAN6920MR • Rev. 1.0.3
4
www.fairchildsemi.com
4페이지 Electrical Characteristics
VDD=15V, TA=-40°C~105°C (TA=TJ), unless otherwise specified.
Symbol
Parameter
Conditions
VDD Section
VOP
VDD-ON
VDD-PWM-OFF
VDD-OFF
Continuously Operating Voltage
Turn-On Threshold Voltage
PWM Off Threshold Voltage
Turn-Off Threshold Voltage
IDD-ST
Startup Current
VDD = VDD-ON - 0.16V,
Gate Open
IDD-OP
Operating Current
IDD-GREEN
Green-Mode Operating Supply
Current (Average)
IDD-PWM-OFF
Operating Current at PWM-Off
Phase
VDD = 15V,
OPFC, OPWM = 100kHz,
CL-PFC, CL-PWM = 2nF
VDD = 15V,
OPWM = 450Hz,
CL-PWM = 2nF
VDD = VDD-PWM-OFF - 0.5V
VDD-OVP
VDD Over-Voltage Protection
(Auto-Recovery)
tVDD-OVP VDD OVP Debounce Time
HV Startup Current Source Section
VAC = 90V (VDC = 120V),
IHV
Supply Current Drawn from HV Pin VDD = 0V
HV = 500V,
VDD = VDD-OFF +1V
VIN and RANGE Section
VVIN-UVP
Threshold Voltage for AC Input
Under-Voltage Protection
VVIN-RE-UVP
Under-Voltage Protection Reset
Voltage
tVIN-UVP
Under-Voltage Protection
Debounce Time
VVIN-RANGE-H
High VVIN Threshold for RANGE
Comparator
VVIN-RANGE-L
Low VVIN Threshold for RANGE
Comparator
tRANGE
Range-Enable / Disable Debounce
Time
VRANGE-OL
IRANGE-OH
Output Low Voltage of RANGE Pin IO = 1mA
Output High Leakage Current of
RANGE Pin
RANGE = 5V
tON-MAX-PFC PFC Maximum On Time
RMOT = 24k
www.DataSheet4U.com
Min. Typ. Max. Units
25 V
10.5 12.0 13.5 V
6 7 8V
4 5 6V
20 30 µA
10 mA
5.5 mA
70 120 170 µA
26.5 27.5 28.5 V
100 150 200 µs
1.3
1.0
mA
µA
0.95 1.00 1.05
VVIN-UVP VVIN-UVP VVIN-UVP
+0.15V +0.20V +0.25V
70 100 130
V
V
ms
2.40 2.45 2.50 V
2.20 2.25 2.30 V
60 90 120 ms
0.5 V
50 nA
22 25 28 µs
Continued on the following page…
© 2010 Fairchild Semiconductor Corporation
FAN6920MR • Rev. 1.0.3
7
www.fairchildsemi.com
7페이지 | |||
구 성 | 총 24 페이지수 | ||
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FAN6920MR | Integrated Critical-Mode PFC and Quasi-Resonant Current-Mode PWM Controller | Fairchild Semiconductor |
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