FAIRCHILD FAN6755W

FAN6755W / FAN6755UW
mWSaver™ PWM Controller
Features

Description
™
mWSaver Technology Provides Industry’s Bestin-Class Standby Power
- <100 mW at 25-mW Load for LCDM Adaptor
- Internal High-Voltage JFET Startup
- Low Operating Current: Under 2 mA
- Adaptively Decrease PWM Frequency to
23 kHz at Light-Load Condition for Better
Efficiency
- Feedback Impedance Switching During
Minimum Load or No Load

Proprietary Asynchronous Frequency Hopping
Technique that Reduces EMI

Fixed PWM Frequency: 65 kHz (FAN6755W),
130 kHz (FAN6755UW)



Internal Leading-Edge Blanking



Soft Gate Drive with Clamped Output Voltage: 18 V



Built-in Synchronized Slope Compensation
Auto-Restart Protection: Feedback Open-Loop
Protection (OLP), VDD Over-Voltage Protection
(OVP), Over-Temperature Protection (OTP), and
Line Over-Voltage Protection
VDD Under-Voltage Lockout (UVLO)
Programmable Constant Power Limit
(Full AC Input Range)
Internal OTP Sensor with Hysteresis
Build-in 5-ms Soft-Start Function
Input Voltage Sensing (VIN Pin) for Brown-In/Out
Protection with Hysteresis and Line Over-Voltage
Protection
This highly integrated PWM controller provides several
features to enhance the performance of flyback
converters.
To minimize standby power consumption, a proprietary
adaptive green-mode function reduces switching
frequency at light-load condition. To avoid acousticnoise problems, the minimum PWM frequency is set
above 23 kHz. This green-mode function enables the
power supply to meet international power conservation
®
requirements, such as Energy Star . With the internal
high-voltage startup circuitry, the power loss caused by
bleeding resistors is also eliminated. To further reduce
power consumption, FAN6755W/UW uses the BiCMOS
process, which allows an operating current of only
2 mA. The standby power consumption can be under
100 mW for most of LCD monitor power supply designs.
FAN6755W / FAN6755UW — mWSaver™ Controller
May 2013
FAN6755W/UW
integrates a frequency-hopping
function that reduces EMI emission of a power supply
with minimum line filters. The built-in synchronized
slope compensation achieves a stable peak-currentmode control and improves noise immunity. The
proprietary line compensation ensures constant output
power limit over a wide AC input voltage range from
90 VAC to 264 VAC.
FAN6755W/UW provides many protection functions.
The internal feedback open-loop protection circuit
protects the power supply from open-feedback-loop
condition or output-short condition. It also has line
under-voltage protection (brownout protection) and
over-voltage protection using an input voltage sensing
pin (VIN).
FAN6755W/UW is available in a 7-pin SOP package.
Applications
General-purpose switched-mode power supplies and
flyback power converters, including:


LCD Monitor Power Supply
Open-Frame SMPS
ENERGY STAR® is a registered trademark of the U.S. Department of Energy and the U.S. Environmental Protection Agency.
© 2009 Fairchild Semiconductor Corporation
FAN6755W / FAN6755UW • Rev. 1.0.7
www.fairchildsemi.com
Part Number
FAN6755WMY
FAN6755UWMY
Operating
Temperature
Range
Package
-40 to +105°C 7-Lead, Small Outline Integrated Circuit
(SOIC), Depopulated JEDEC MS-112, .150
-40 to +105°C Inch Body
PWM
Frequency
Packing
Method
65 kHz
Reel & Tape
130 kHz
Reel & Tape
Application Diagram
N
EMI
Filter
Vo+
+
+
L
Vo-
1
7
HV
VIN
VDD 6
+
GATE 5
2
FB
SENSE 3
4
FAN6755W
Figure 1.
© 2009 Fairchild Semiconductor Corporation
FAN6755W / FAN6755UW • Rev. 1.0.7
FAN6755W / FAN6755UW — mWSaver™ Controller
Ordering Information
Typical Application
www.fairchildsemi.com
2
HV
7
Re-start
Protection
Brownout Protection
OTP
OVP
OLP
VIN-OVP
VDD
Soft
Driver
VPWM
OSC
VDD
6
S
VDD-ON /VDD-OFF
Soft-Start
Current Limit
Comparator
Green
Mode
Circuit
Blanking
VLimit
OVP
PWM
Comparator
VDD-OVP
Max.
Duty
VIN-ON / VIN-OFF
Brownout Protection
1
SENSE
Soft-Start
Comparator
Pattern
Generator
VRESET
VIN
3
Q
VRESET
…
Debounce
GATE
R
Internal
BIAS
UVLO
5
High/Low
Line Compensation
Debounce
VLimit
OLP
FAN6755W / FAN6755UW — mWSaver™ Controller
Internal Block Diagram
5.3V
VPWM
Slope
Compensation
3R
2
FB
R
OLP
Delay
VIN-OVP
OLP
Comparator
VIN-Protect
VFB-OLP
4
GND
Figure 2.
Internal Block Diagram
Marking Information
7
7
ZXYTT
6755
WTPM
Z: Plant Code
X: 1-Digit Year Code
Y: 1-Digit Week Code
TT: 2-Digit Die Run Code
T: Package Type (M:SOP)
P: Y=Green Package
M: Manufacture Flow Code
ZXYTT
6755U
WTPM
Figure 3. Top Mark
© 2009 Fairchild Semiconductor Corporation
FAN6755W / FAN6755UW • Rev. 1.0.7
www.fairchildsemi.com
3
SOP-7
VIN
1
FB
2
SENSE
GND
Figure 4.
7
HV
3
6
VDD
4
5
GATE
Pin Configuration (Top View)
Pin Definitions
Pin #
Name
Description
1
VIN
Line-voltage detection. The line-voltage detection is used for brownout protection with
hysteresis. Constant output power limit over universal AC input range is also achieved using this
VIN pin. It is suggested to add a low-pass filter to filter out line ripple on the bulk capacitor.
Pulling VIN HIGH also triggers auto-restart protection.
2
FB
The signal from the external compensation circuit is fed into this pin. The PWM duty cycle is
determined in response to the signal on this pin and the current-sense signal on the SENSE pin.
3
SENSE
4
GND
Ground
5
GATE
The totem-pole output driver. Soft-driving waveform is implemented for improved EMI.
6
VDD
7
HV
FAN6755W / FAN6755UW — mWSaver™ Controller
Pin Configuration
Current sense. The sensed voltage is used for peak-current-mode control and cycle-by-cycle
current limiting.
Power supply. The internal protection circuit disables PWM output as long as V DD exceeds the
OVP trigger point.
For startup, this pin is connected to the line input or bulk capacitor in series with resistors.
© 2009 Fairchild Semiconductor Corporation
FAN6755W / FAN6755UW • Rev. 1.0.7
www.fairchildsemi.com
4
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be
operable above the recommended operating conditions and stressing the parts to these levels is not recommended.
In addition, extended exposure to stresses above the recommended operating conditions may affect device
reliability. The absolute maximum ratings are stress ratings only.
Symbol
Parameter
Min.
(1, 2)
Max.
Unit
30
V
VVDD
DC Supply Voltage
VFB
FB Pin Input Voltage
-0.3
7.0
V
SENSE Pin Input Voltage
-0.3
7.0
V
VVIN
VIN Pin Input Voltage
-0.3
7.0
V
VHV
HV Pin Input Voltage
700
V
PD
Power Dissipation (TA＜50°C)
400
mW
JA
Thermal Resistance (Junction-to-Air)
150
C/W
TJ
Operating Junction Temperature
-40
+125
C
Storage Temperature Range
-55
+150
C
+260
C
VSENSE
TSTG
TL
ESD
Lead Temperature (Wave Soldering or IR, 10 Seconds)
Human Body Model,
JEDEC: JESD22-A114
All Pins Except HV Pin
5.5
Charged Device Model,
JEDEC: JESD22-C101
All Pins Except HV Pin
2.0
kV
FAN6755W / FAN6755UW — mWSaver™ Controller
Absolute Maximum Ratings
Notes:
1. All voltage values, except differential voltages, are given with respect to the network ground terminal.
2. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device.
3. ESD with HV pin: CDM=2000 V (FAN6755W) or 1500 V (FAN6755UW), and HBM=3500 V.
© 2009 Fairchild Semiconductor Corporation
FAN6755W / FAN6755UW • Rev. 1.0.7
www.fairchildsemi.com
5
VDD=15 V, TA=25C, unless otherwise noted.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
22
V
17
V
VDD Section
VOP
Continuously Operating Voltage
VDD-ON
Start Threshold Voltage
VDD-OFF
Protection Mode
UVLO
Normal Mode
IDD-ST
Startup Current
IDD-OP
Full Load
15
16
9
10
11
V
6.8
7.8
8.8
V
VDD-ON – 0.16 V
30
µA
Operating Supply Current
VDD=15 V, GATE Open
2
mA
IDD-OLP
Internal Sink Current
VDD-OLP+0.1 V
30
60
90
µA
VDD-OLP
Threshold Voltage on VDD for HV
JFET Turn-On
6.5
7.5
8.0
V
VDD-OVP
VDD Over-Voltage Protection
25
26
27
V
tD-VDDOVP
VDD Over-Voltage Protection
Debounce Time
75
125
200
µs
2.0
3.5
5.0
mA
1
20
µA
HV Section
IHV
IHV-LC
Supply Current Drawn from HV Pin
VDC=120 V, VDD=10 µF,
VDD=0 V
Leakage Current after Startup
HV=700 V, VDD=VDDOFF+1 V
VDD
FAN6755W / FAN6755UW — mWSaver™ Controller
Electrical Characteristics
VDD
VDD-ON
VDD-ON
VDD-OFF
UVLO
VDD-OLP
t
t
Normal Mode
Protection Mode
Figure 5.
VDD Behavior
Continued on the following page…
© 2009 Fairchild Semiconductor Corporation
FAN6755W / FAN6755UW • Rev. 1.0.7
www.fairchildsemi.com
6
VDD=15 V, TA=25C, unless otherwise noted.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
Oscillator Section
Center
Frequency
FAN6755W
62
65
68
FAN6755UW
124
130
136
Hopping
Range
FAN6755W
±4.5
±5.2
±5.9
±9
±10.4
±11.8
Green-Mode Frequency
20
23
26
kHz
tHOP
Hopping Period
10
12
14
ms
fDV
Frequency Variation vs. VDD
Deviation
VDD=11 V to 22 V
5
%
fDT
Frequency Variation vs.
Temperature Deviation
TA=-40 to 85C=TJ
5
%
fOSC
fOSC-G
Frequency in Normal Mode
FAN6755UW
kHz
VIN Section
VIN-OFF
PWM Turn-Off (Brown-out)
Threshold Voltage
VIN-ON
PWM Turn-On (Brown in)
Threshold Voltage
VIN-Protect
tVIN-Protect
0.66
0.70
0.74
VIN-OFF+ VIN-OFF+ VIN-OFF+
0.17
0.20
0.23
Threshold Voltage of VIN OverVoltage Protection
Debounce Time of VIN OverVoltage Protection
V
V
5.1
5.3
5.5
V
60
100
140
µs
FAN6755W / FAN6755UW — mWSaver™ Controller
Electrical Characteristics
Current-Sense Section
VLIMIT at
VIN=1 V
Threshold Voltage for Current Limit
VIN=1 V
0.80
0.83
0.86
V
VLIMIT at
VIN=3 V
Threshold Voltage for Current Limit
VIN=3 V
0.67
0.70
0.73
V
100
200
ns
tPD
Delay to Output
tLEB
Leading-Edge Blanking Time
tSS
Period During Soft-Start Time
Soft-Start (FAN6755UW)
125
150
175
Steady State
240
290
340
Startup Time
4.0
5.5
7.0
ns
ms
VLimit
VIN-OFF =0.92V
VIN-Protect =5.3V
VSENSE =0.83V
VSENSE =0.7V
VIN
VIN=1V
VIN=3V
Figure 6.
VIN vs. VSENSE
Continued on the following page…
© 2009 Fairchild Semiconductor Corporation
FAN6755W / FAN6755UW • Rev. 1.0.7
www.fairchildsemi.com
7
VDD=15 V, TA=25C, unless otherwise noted.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
1/4.5
1/4.0
1/3.5
V/V
Feedback Input Section
AV
Internal FB Voltage Attenuation
ZFB
Input Impedance
VFB=4 V
10
15
19
kΩ
VFB-OPEN
The Maximum Clamp of FB Voltage
FB Pin Open
5.1
5.3
5.5
V
VFB-OLP
FB Open-Loop Protection Triggering
Level
4.4
4.6
4.8
V
tD-OLP
Delay Time of FB Pin Open-loop
Protection
45.0
62.5
70.0
ms
VFB-N
Green-Mode Entry FB Voltage
2.8
3.0
3.2
V
VFB-G
Green-Mode Ending FB Voltage
VFB-N - 0.6
V
VFB-ZDCR
FB Threshold Voltage for Zero-Duty
Recovery
1.6
1.8
2.0
V
VFB-ZDC
FB Threshold Voltage for Zero-Duty
1.4
1.6
1.8
V
0.12
0.15
0.19
V
VFB-ZDCR ZDC Hysteresis
VFB-ZDC
FAN6755W / FAN6755UW — mWSaver™ Controller
Electrical Characteristics
Frequency
+ hopping range
fOSC
- hopping range
PWM
Frequency
+1.76KHz
fOSC-G
-1.76KHz
VFB-ZDCVFB-ZDCRVFB-G
Figure 7.
VFB-N
VFB
VFB vs. PWM Frequency
Continued on the following page…
© 2009 Fairchild Semiconductor Corporation
FAN6755W / FAN6755UW • Rev. 1.0.7
www.fairchildsemi.com
8
VDD=15 V, TA=25C, unless otherwise noted.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
60
75
90
%
1.5
V
GATE Section
DCYMAX
Maximum Duty Cycle
VGATE-L
Gate Low Voltage
VDD=15 V, IO=50 mA
VGATE-H
Gate High Voltage
VDD=12 V, IO=50 mA
tr
Gate Rising Time
VDD=15 V, CL=1 nF
100
ns
tf
Gate Falling Time
VDD=15 V, CL=1 nF
30
ns
Gate Source Current
VDD=15 V, GATE=6 V
700
mA
Gate Output Clamping Voltage
VDD=22 V
IGATESOURCE
VGATECLAMP
8
V
18
V
Over-Temperature Protection Section (OTP)
TOTP
TRestart
Protection Junction Temperature
Restart Junction Temperature
(4,6)
(5,6)
Notes:
4. When OTP is activated, the PWM switching is shut down.
5. When junction temperature is lower than this level, IC resumes PWM switching.
6. These parameters are guaranteed by design.
© 2009 Fairchild Semiconductor Corporation
FAN6755W / FAN6755UW • Rev. 1.0.7
140
°C
TOTP-25
°C
FAN6755W / FAN6755UW — mWSaver™ Controller
Electrical Characteristics
www.fairchildsemi.com
9
Figure 8. Startup Current (IDD-ST) vs. Temperature
Figure 9. Operation Supply Current (IDD-OP)
vs. Temperature
Figure 10. Start Threshold Voltage (VDD-ON)
vs. Temperature
Figure 11. Minimum Operating Voltage (VDD-OFF)
vs. Temperature
Figure 12. Supply Current Drawn from HV Pin (IHV)
vs. Temperature
Figure 13. HV Pin Leakage Current After Startup
(IHV-LC) vs. Temperature
Figure 14. Frequency in Normal Mode (fOSC)
vs. Temperature
Figure 15. Maximum Duty Cycle (DCYMAX)
vs. Temperature
© 2009 Fairchild Semiconductor Corporation
FAN6755W / FAN6755UW • Rev. 1.0.7
FAN6755W / FAN6755UW — mWSaver™ Controller
Typical Performance Characteristics
www.fairchildsemi.com
10
Figure 16. FB Open-Loop Trigger Level (VFB-OLP)
vs. Temperature
Figure 17. Delay Time of FB Pin Open-Loop Protection
(tD-OLP) vs. Temperature
Figure 18. PWM Turn-Off Threshold Voltage
(VIN-OFF & VIN-ON) vs. Temperature
Figure 19. VDD Over-Voltage Protection (VDD-OVP)
vs. Temperature
FAN6755W / FAN6755UW — mWSaver™ Controller
Typical Performance Characteristics
Figure 20. VIN vs. VLIMIT
© 2009 Fairchild Semiconductor Corporation
FAN6755W / FAN6755UW • Rev. 1.0.7
www.fairchildsemi.com
11
Startup Current
Gate Output / Soft Driving
For startup, the HV pin is connected to the line input or
bulk capacitor in series with diodes and/or resistors. If HV
pin is connected to the line input, a 1-kV/ 1-A diode and a
100 kΩ resistor are recommended. If HV pin is connected
to the bulk capacitor, only the resistor is required. Startup
current drawn from pin HV (typically 3.5 mA) charges the
hold-up capacitor through the diode and resistor. When
the VDD capacitor level reaches VDD-ON, the startup current
switches off. At this moment, only the VDD capacitor
supplies the FAN6755W/UW to maintain VDD before the
auxiliary winding of the main transformer to provide the
operating current.
The BiCMOS output stage is a fast totem-pole gate
driver. Cross conduction has been avoided to minimize
heat dissipation, increase efficiency, and enhance
reliability. The output driver is clamped by an internal
18 V Zener diode to protect power MOSFET transistors
against undesirable gate over voltage. A soft-driving
circuit is implemented to minimize EMI.
Soft-Start
For many applications, it is necessary to minimize the
inrush current at startup. The built-in 5.5 ms soft-start
circuit significantly reduces the startup current spike
and output voltage overshoot.
Operating Current
Operating current is below 2 mA. The low operating
current enables better efficiency and reduces the
requirement of VDD hold-up capacitance.
Slope Compensation
The sensed voltage across the current-sense resistor is
used for peak-current-mode control and pulse-by-pulse
current limiting. Built-in slope compensation improves
stability and prevents sub-harmonic oscillation.
FAN6755W/UW inserts a synchronized positive-going
ramp at every switching cycle as slope compensation.
Green-Mode Operation
The proprietary green-mode function provides an offtime modulation to reduce the switching frequency in
light-load and no-load conditions. The on time is limited
for better abnormal or brownout protection. V FB, which is
derived from the voltage feedback loop, is taken as the
reference. Once VFB is lower than the threshold voltage,
switching frequency is continuously decreased to the
minimum green-mode frequency of around 23 kHz.
FAN6755W / FAN6755UW — mWSaver™ Controller
Functional Description
Constant Output Power Limit
For constant output power limit over universal inputvoltage range, the peak-current threshold is adjusted by
the voltage of the VIN pin. Since the VIN pin is
connected to the rectified AC input line voltage through
the resistive divider, a higher line voltage generates a
higher VIN voltage. The threshold voltage decreases as
VIN increases, making the maximum output power at
high-line input voltage equal to that at low-line input.
The value of R-C network should not be so large that it
affects the power limit (shown in Figure 21). R and C
should be less than 100  and 470 pF, respectively.
Current Sensing / PWM Current Limiting
Peak-current-mode control is utilized to regulate output
voltage and provide pulse-by-pulse current limiting. The
switching current is detected by the current-sensing
resistor of SENSE pin. The PWM duty cycle is
determined by this current sense signal and VFB, the
feedback voltage. When the voltage on the SENSE pin
reaches around VCOMP=(VFB–0.6)/4, the PWM switching
turns off immediately.
Leading-Edge Blanking (LEB)
Each time the power MOSFET is switched on, a turn-on
spike occurs on the sense resistor. To avoid premature
termination of the switching pulse, a leading-edge
blanking time is built in. During this blanking period, the
current-limit comparator is disabled and cannot switch
off the gate driver.
FAN6755W
Blanking
Circuit
GATE
R
SENSE
C
Under-Voltage Lockout (UVLO)
The turn-on and turn-off thresholds are fixed internally
at 16 V and 7.8 V in normal mode. During startup, the
hold-up capacitor must be charged to 16 V through the
startup resistor to enable the IC. The hold-up capacitor
continues to supply VDD before the energy can be
delivered from auxiliary winding of the main transformer.
VDD must not drop below 7.8 V during startup. This
UVLO hysteresis window ensures that the hold-up
capacitor is adequate to supply VDD during startup.
© 2009 Fairchild Semiconductor Corporation
FAN6755W / FAN6755UW • Rev. 1.0.7
Figure 21.
Current-Sense R-C Filter
www.fairchildsemi.com
12
VIN 
VDD over-voltage protection prevents damage due to
abnormal conditions. Once the VDD voltage is over the
over-voltage protection voltage (VDD-OVP), and lasts for tDVDDOVP, the PWM pulses are disabled. When the VDD
voltage drops below the UVLO, the internal startup circuit
turns on, and VDD is charged to VDD-ON to restart IC.
Thermal overload protection limits total power
dissipation. When the junction temperature exceeds T J=
+140C, the thermal sensor signals the shutdown logic
and turns off most of the internal circuitry. The thermal
sensor turns internal circuitry on again after the IC’s
junction temperature drops by 25C. Thermal overload
protection is designed to protect the FAN6755W/UW in
the event of a fault condition. For continual operation,
the controller should not exceed the absolute maximum
junction temperature of TJ = +140C.
FAN6755W/UW actively varies FB-pin impedance
(ZFB) to reduce no-load power consumption. This
technique can further reduce operating current of the
controller when FB-pin voltage drops below V FB-ZDC.
Figure 22 exhibits the range that Z FB changes. When
VFB is lower than VFB-ZDC, PWM switching is stopped
and ZFB is switched from 15 kΩ to 90 kΩ. On the other
hand, ZFB is switched from 90 kΩ to 15 kΩ when VFB is
higher than VFB-ZDCR.
ZFB
=90k
Limited Power Control
The FB voltage is saturated HIGH when the power
supply output voltage drops below its nominal value and
shut regulator (KA431) does not draw current through
the opto-coupler. This occurs when the output feedback
loop is open or output is short circuited. If the FB
voltage is higher than a built-in threshold for longer than
tD-OLP, PWM output is turned off. As PWM output is
turned off, VDD begins decreasing since no more energy
is delivered from the auxiliary winding.
Proprietary
ZFB
=15k
VFB-ZDC VFB-ZDCR
(1)
Thermal Overload Protection
Feedback Impedance Switching
fosc (kHz)
RLower
 VAC 2 , (unit  V )
RLower  RUpper
FAN6755W / FAN6755UW — mWSaver™ Controller
VDD Over-Voltage Protection
As the protection is triggered, VDD enters into UVLO
mode. This protection feature continues as long as the
over loading condition persists. This prevents the power
supply from overheating due to overloading conditions.
VFB(V)
Noise Immunity
Figure 22.
Noise on the current sense or control signal may cause
significant pulse-width jitter, particularly in continuousconduction mode. Slope compensation helps alleviate
this problem. Good placement and layout practices
should be followed. Avoiding long PCB traces and
component leads, locating compensation and filter
components near the FAN6755W/UW, and increasing
the gate resistor from GATE pin to MOSFET improve
performance.
ZFB-Switching Activating Range
Brownout Protection
Since the VIN pin is connected through a resistive
divider to the rectified AC input line voltage, it can also
be used for brownout protection. If VIN is less than
0.7 V, the PWM output is shut off. When VIN reaches
over 0.9 V, the PWM output is turned on again. The
hysteresis window for ON/OFF is around 0.2 V. The
brownout voltage setting is determined by the potential
divider formed with RUpper and RLower. Equations to
calculate the resistors are shown below:
© 2009 Fairchild Semiconductor Corporation
FAN6755W / FAN6755UW • Rev. 1.0.7
www.fairchildsemi.com
13
R6
12V 1
1
C7
N1 8
R7
12V
L2
P1
2
12V
C5
1
N1
N1 A
N2
3
C1
L1
M1
4
2
L
1
ZD 1
TX 1
12
11
C2
C11
+
R14
N5 N6 6
1
D3
VIN
2
N3
11
N
N1 7 D1
R4
N2 1
8 R5
N2 0
7
1
3
R2
4
C4
4
R3
AC IN
N4
C3
N2 8
1
1
2
3
2
CN 1
+ C9
3
BD 1
R1
+ C8
2
2
F1
R8
C10
N7
10
9
2
D4
C6
5V 1
1
5V
L3
P2
2
5V
2
R17
3
C15
+ C14
2
+ C13
C12
R13
D5
1
2
R9
N8
Q1
N1 0
R10
D2
1 N9
R11
3
2
N3 0
SG ND
N2 9
R15
R12
1
HV
P3
R16
VIN
U1
4
C16
HV
7
R20
VD D
FB
SEN SE
GN D
VD D
GA TE
5V 1
R19
6
1
3
VIN
N1 2
N1 3
U2
5
R22
GA TE
12V
FAN6755W
FA
N6755
C17
R28
C18
+
K
U3
N1 4
R21
C20
R
A
© 2009 Fairchild Semiconductor Corporation
FAN6755W / FAN6755UW • Rev. 1.0.7
R23
R24
R26
R27
N1 5
R18
Figure 23.
5V
C19
3
SEN SE
2
2
4
1
FB
N1 6
R25
FAN6755W / FAN6755UW — mWSaver™ Controller
Typical Application Circuit
44 W Flyback 12 V/2 A, 5 V/4 A Application Circuit
www.fairchildsemi.com
14
Designator
Part Type
Designator
Part Type
BD1
BD 4 A/600 V
Q1
MOS 9 A/600 V
C1
YC 2200 pF/Y1
R1
R 1.5 M 1/4 W
C2
YC 2200 pF/Y1
R2
R 1.5 M 1/4 W
C3
XC 0.33 µF/300 V
R3
R 10 M 1/4 W
C4
NC
R4, R5, R6, R7
R 47  1/4 W
C5
YC 2200 pF/Y1
R8, R17, R25, R27
NC
C6
CC 2200 pF/100 V
R9
R 50 K 1/4 W
C7
CC 1000 pF/100 V
R10
R 50 K 1/4 W
C8
EC 1000 µF/25 V
R11
R 0  1/8 W
C9
EC 470 µF/25 V
R12
R 47  1/8 W
C10
CC 100 pF/50 V
R13
R 100 K 1/8 W
C11
EC 100 µF/400 V
R14
R 0  1/4 W
C12
C 1 µF/50 V
R15
R 10 K 1/8 W
C13
EC 1000 µF/10 V
R16
R 1  1/8 W
C14
EC 470 µF/10 V
R18
R 0  1/8 W
C15
CC 100 pF/50 V
R19
R 100  1/8 W
C16
C 1 nF/50 V
R20
R 1 K 1/8 W
C17
C 470 pF/50 V
R21
R 4.7 K 1/8 W
C18
EC 47 µF/50 V
R22
R 7.5 K 1/8 W
C19
C 0.01 µF/50 V
R23
R 120 K 1/8 W
C20
C 0.1 µF/50 V
R24
R 15 K 1/8 W
D1
FYP1010
R26
R 10 K 1/8 W
D2
1N4148
R28
R 0.43  2 W
D3
FR107
TX1
800 µH(ERL-28)
D4
FR103
U1
IC FAN6755W
D5
FYP1010
U2
IC PC817
ZD1
P6KE150A
U3
IC TL431
F1
FUSE 4A/250V
M1
VZ 9G
L1
13 mH
L2
Inductor (2 µH)
L3
Inductor (2 µH)
© 2009 Fairchild Semiconductor Corporation
FAN6755W / FAN6755UW • Rev. 1.0.7
FAN6755W / FAN6755UW — mWSaver™ Controller
Bill of Materials
www.fairchildsemi.com
15
5.00
4.80
7
7
A
3.81
0.65TYP
3.81
6
5
B
1.75TYP
6.20
5.80
PIN #1
4.00
3.80
1
2 3
4
1.27
(0.33)
3.85 7.35
0.25
C B A
TOP VIEW
1.27
LAND PATTERN RECOMMENDATION
SEE DETAIL A
0.25
0.19
0.25
0.10
OPTION A - BEVEL EDGE
C
1.75 MAX
FAN6755W / FAN6755UW — mWSaver™ Controller
Physical Dimensions
0.10 C
0.51
0.33
FRONT VIEW
OPTION B - NO BEVEL EDGE
0.50 x 45°
0.25
R0.10
NOTES:
GAGE PLANE
R0.10
0.36
8°
0°
0.90
0.406
SEATING PLANE
(1.04)
DETAIL A
SCALE: 2:1
A) THIS PACKAGE DOES NOT FULLY CONFORMS
TO JEDEC MS-012, VARIATION AA, ISSUE C,
DATED MAY 1990.
B) ALL DIMENSIONS ARE IN MILLIMETERS.
C) DIMENSIONS DO NOT INCLUDE MOLD
FLASH OR BURRS.
D) STANDARD LEAD FINISH:
200 MICROINCHES / 5.08 MICRONS MIN.
LEAD/TIN (SOLDER) ON COPPER.
E) DRAWING FILENAME : M07Arev3
Figure 24.
7-Lead, Small Outline Package (SOP)
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’s online packaging area for the most recent package drawings:
http://www.fairchildsemi.com/packaging/.
© 2009 Fairchild Semiconductor Corporation
FAN6755W / FAN6755UW • Rev. 1.0.7
www.fairchildsemi.com
16
FAN6755W / FAN6755UW — mWSaver™ Controller
© 2009 Fairchild Semiconductor Corporation
FAN6755W / FAN6755UW • Rev. 1.0.7
www.fairchildsemi.com
17