FAIRCHILD FSCM0765RI

www.fairchildsemi.com
FSCM0765R
Green Mode Fairchild Power Switch (FPSTM)
Features
• Internal Avalanche Rugged SenseFET
• Low Start-up Current (max 40uA)
• Low Power Consumption under 1 W at 240VAC and
0.4W Load
• Precise Fixed Operating Frequency (66kHz)
• Frequency Modulation for low EMI
• Pulse by Pulse Current Limiting (Adjustable)
• Over Voltage Protection (OVP)
• Over Load Protection (OLP)
• Thermal Shutdown Function (TSD)
• Auto-Restart Mode
• Under Voltage Lock Out (UVLO) with Hysteresis
• Built-in Soft Start (15ms)
Application
• SMPS for VCR, SVR, STB, DVD and DVCD
• Adaptor
• SMPS for LCD Monitor
OUTPUT POWER TABLE
230VAC ±15%(3)
85-265VAC
PRODUCT
Adapter(1)
Open
Frame(2)
Adapter(1)
Open
Frame(2)
FSCM0565RJ
50W
65W
40W
50W
FSCM0765RJ
65W
70W
50W
60W
FSCM0565RI
50W
65W
40W
50W
FSCM0765RI
65W
70W
50W
60W
FSCM0565RG
70W
85W
60W
70W
FSCM0765RG
85W
95W
70W
85W
Table 1. Maximum Output Power
Notes:
1. Typical continuous power in a non-ventilated enclosed
adapter measured at 50°C ambient.
2. Maximum practical continuous power in an open-frame
design at 50°C ambient.
3. 230 VAC or 100/115 VAC with doubler.
Related Application Notes
• AN-4137: Design Guidelines for Off-line Flyback
Converters Using Fairchild Power Switch (FPS)
• AN-4140: Transformer Design Consideration for off-line
Flyback Converters using Fairchild Power Switch
• AN-4141: Troubleshooting and Design Tips for Fairchild
Power Switch Flyback Applications
• AN-4148: Audible Noise Reduction Techniques for FPS
Applications
Typical Circuit
DC
OUT
AC
IN
Drain
Description
The FSCM0765R is an integrated Pulse Width Modulator
(PWM) and SenseFET specifically designed for high
performance offline Switch Mode Power Supplies (SMPS)
with minimal external components. This device is an
integrated high voltage power switching regulator which
combines an avalanche rugged SenseFET with a current
mode PWM control block. The PWM controller includes
integrated fixed frequency oscillator, under voltage lockout,
leading edge blanking (LEB), optimized gate driver, internal
soft start, temperature compensated precise current sources
for a loop compensation, and self protection circuitry.
Compared with a discrete MOSFET and PWM controller
solution, it can reduce total cost, component count, size, and
weight while simultaneously increasing efficiency, productivity,
and system reliability. This device is a basic platform well
suited for cost effective designs of flyback converters.
PWM
Ilimit
Vfb
Vcc
GND
Figure 1. Typical Flyback Application
Rev.1.1.0
©2005 Fairchild Semiconductor Corporation
FSCM0765R
Internal Block Diagram
N.C
VCC
5
3
Drain
1
Vcc Good
Vref
0.3/0.5V
8V/12V
+
Freq.
Modulation
Vcc
Internal
Bias
Vcc
OSC
Idelay
IFB
PWM
S
Q
R
Q
2.5R
FB 4
Gate
Driver
R
6
I_limit
Soft start
0.3K
LEB
VSD
VCC
2 GND
S
Q
R
Q
VOVP
TSD
Vcc Good
Vcc UV Reset
Figure 2. Functional Block Diagram of FSCM0765R
2
FSCM0765R
Pin Definitions
Pin Number
Pin Name
Pin Function Description
1
Drain
This pin is the high voltage power SenseFET drain. It is designed to drive the
transformer directly.
2
GND
This pin is the control ground and the SenseFET source.
3
VCC
This pin is the positive supply voltage input. Initially, During start up, the power is
supplied through the startup resistor from DC link. When Vcc reaches 12V, the
power is supplied from the auxiliary transformer winding.
4
Feedback (FB)
This pin is internally connected to the inverting input of the PWM comparator.
The collector of an optocoupler is typically tied to this pin. For stable operation, a
capacitor should be placed between this pin and GND. If the voltage of this pin
reaches 6.0V, the over load protection is activated resulting in shutdown of the
FPS.
5
N.C.
6
I_limit
This pin is not connected.
This pin is for the pulse by pulse current limit level programming. By using a
resistor to GND on this pin, the current limit level can be changed. If this pin is
left floating, the typical current limit will be 3.0A.
FSCM0765RJ
FSCM0765RI
D2-PAK-6L
I2-PAK-6L
FSCM0765RI
6 : I_limit
5 : N.C.
4 : FB
3 : Vcc
2 : GND
1 : Drain
6 : I_limit
5 : N.C.
4 : FB
3 : Vcc
2 : GND
1 : Drain
FSCM0765RG
TO-220-6L
FSCM0765RG
FSCM0765RJ
Pin Configuration
6. I_limit
5. N.C.
4. FB
3. Vcc
2. GND
1. Drain
Figure 3. Pin Configuration (Top View)Absolute Maximum Ratings
3
FSCM0765R
(Ta=25°C, unless otherwise specified.)
Parameter
Symbol
Value
Unit
Drain-Source (GND) Voltage (1)
VDSS
650
V
Drain-Gate Voltage (RGS=1MΩ)
VDGR
650
V
VGS
±30
V
IDM
21
ADC
@ Tc = 25°C
ID
5.3
ADC
@ Tc =100°C
ID
3.4
ADC
ID
7
ADC
Gate-Source (GND) Voltage
Drain Current Pulsed
(2)
Continuous Drain Current (D2-PAK, I2-PAK)
Continuous Drain Current (TO-220)
@ Tc = 25°C
@ Tc =100°C
ID
4.4
ADC
Supply Voltage
VCC
20
V
Analog Input Voltage Range
VFB
-0.3 to VCC
V
Total Power Dissipation (D2-PAK,I2-PAK)
PD
83
W
Total Power Dissipation (TO-220)
PD
145
W
Operating Junction Temperature
TJ
Internally limited
°C
Operating Ambient Temperature
TA
-25 to +85
°C
Storage Temperature Range
TSTG
-55 to +150
°C
ESD Capability, HBM Model
(All pins except Vfb)
-
2.0
(GND-Vfb = 1.5kV)
(Vcc-Vfb = 1.0kV)
kV
ESD Capability, Machine Model
(All pins except Vfb)
-
300
(GND-Vfb = 250V)
(Vcc-Vfb = 100V)
V
Symbol
Value
Unit
θJA
θJC(2)
θJC(2)
-
°C/W
1.5
°C/W
0.9
°C/W
Notes:
1. Tj = 25°C to 150°C
2. Repetitive rating: Pulse width limited by maximum junction temperature.
Thermal Impedance
Parameter
Junction-to-Ambient Thermal
Junction-to-Case Thermal (D2-PAK, I2-PAK)
Junction-to-Case Thermal (TO-220)
Note:
1. Free standing with no heat-sink under natural convection
2. Infinite cooling condition - Refer to the SEMI G30-88.
4
(1)
FSCM0765R
Electrical Characteristics
(Ta = 25°C unless otherwise specified.)
Parameter
Symbol
Condition
Min.
Typ.
Max.
Unit
BVDSS
VGS = 0V, ID = 250μA
650
-
-
V
VDS = Max, Rating
VGS = 0V
-
-
500
μA
RDS(ON)
VGS = 10V, ID = 2.3A
-
1.4
1.6
Ω
Output Capacitance
COSS
VGS = 0V, VDS = 25V,
f = 1MHz
-
100
-
pF
Turn on Delay Time
TD(ON)
-
25
-
-
60
-
-
115
-
-
65
-
60
66
72
kHz
SenseFET SECTION
Drain Source Breakdown Voltage
Zero-Gate-Voltage Current
Static Drain Source on Resistance (1)
Rise Time
Turn off Delay Time
Fall Time
IDSS
TR
TD(OFF)
VDD= 325V, ID= 5A
(MOSFET switching
time is essentially
independent of
operating temperature)
TF
ns
CONTROL SECTION
Initial Frequency
FOSC
Modulated Frequency Range
ΔFmod
-
-
±3
-
kHz
Frequency Modulation Cycle
Tmod
-
-
4
-
ms
10V ≤ VCC ≤ 17V
0
1
3
%
−25°C ≤ Ta ≤ +85°C
-
±5
±10
%
Voltage Stability
Temperature Stability (2)
FSTABLE
ΔFOSC
VCC = 14V, VFB = 5V
Maximum Duty Cycle
DMAX
-
75
80
85
%
Minimum Duty Cycle
DMIN
-
-
-
0
%
Start Threshold Voltage
VSTART
VFB = GND
11
12
13
V
Stop Threshold Voltage
VSTOP
VFB = GND
7
8
9
V
Feedback Source Current
IFB
VFB = GND
0.7
0.9
1.1
mA
Soft-start Time
TSS
-
10
15
20
ms
Initial Frequency
TLEB
-
-
300
-
ns
BURST MODE SECTION
Burst Mode Voltages (2)
VBH
Vcc = 14V
0.4
0.5
0.6
V
VBL
Vcc = 14V
0.24
0.3
0.36
V
Notes:
1. Pulse Test: Pulse width ≤ 300μS, duty ≤ 2%
2. These parameters, although guaranteed at the design, are not tested in mass production.
5
FSCM0765R
PROTECTION SECTION
Peak Current Limit(2)
Over Voltage Protection
Thermal Shutdown Temperature(1)
ShutdownDelay Current
Shutdown Feedback Voltage
ILIM
VCC = 14V, VFB = 5V
2.64
3
3.36
A
VOVP
-
18
19
20
V
130
145
160
°C
VFB = 4V
3.5
5.3
7
μA
VFB > 5.5V
5.5
6
6.5
V
-
20
40
μA
-
2.5
5
mA
TSD
IDELAY
VSD
TOTAL DEVICE SECTION
Startup Current
Operating Supply Current(3)
Istart
IOP(MIN)
VCC = 10V, VFB = 0V
IOP(MAX)
VCC = 20V, VFB = 0V
Notes:
1. These parameters, although guaranteed at the design, are not tested in mass production.
2. These parameters indicate the inductor current.
3. This parameter is the current flowing into the control IC.
6
FSCM0765R
Comparison Between FSDM07652R and FSCM0765R
Function
Frequency Modulation
FSDM07652R
N/A
FSCM0765R
Available
• Modulated frequency range (DFmod) = ±3kHz
• Frequency modulation cycle (Tmod) = 4ms
Pulse-by-pulse Current Limit • Internally fixed (2.5A)
• Programmable using external resistor (3A max)
Internal Startup Circuit
• N/A (Requires a startup resistor)
• Startup current: 40uA (max)
• Available
7
FSCM0765R
Typical Performance Characteristics
(These Characteristic Graphs are Normalized at Ta= 25°C.)
1.20
1.40
Start Threshold Voltage
(Normalized to 25℃)
Start up Current
(Normalized to 25℃)
1.60
1.20
1.00
0.80
0.60
1.04
0.96
0.88
0.80
-50
-25
0
25 50 75 100 125
Junction T emperature (℃)
-50
1.12
1.12
Initial Frequency
(Normalized to 25℃)
1.20
0.96
0.80
0.80
0
25
50
75
-50
100 125
1.20
1.12
1.12
FB Source Current
(Normalized to 25℃)
Maximum Duty Cycle
(Normalized to 25℃)
1.20
0.88
-25
0
25
50
75
100 125
1.04
0.96
0.88
0.80
0.80
-50
-25
0
25
50
75
100 125
Junction T emperature ( ℃)
Figure 6. Maximum Duty Cycle vs. Temp
8
100 125
Figure 8. Initial Freqency vs. Temp
Figure 5. Stop Threshold Voltage vs. Temp
0.96
75
Junction T emperature ( ℃)
Junction T emperature ( ℃)
1.04
50
0.96
0.88
-25
25
1.04
0.88
-50
0
Figure 7. Start Threshold Voltage vs. Temp
1.20
1.04
-25
Junction T emperature ( ℃)
Figure 4. Startup Current vs. Temp
Stop Threshold Voltage
(Normalized to 25℃)
1.12
-50
-25
0
25
50
75
100 125
Junction T emperature ( ℃)
Figure 9. Feedback Source Current vs. Temp
FSCM0765R
Typical Performance Characteristics (Continued)
(These Characteristic Graphs are Normalized at Ta= 25°C.)
1.20
Shutdown Delay Current
(Normalized to 25℃)
Shutdown FB Voltage
(Normalized to 25℃)
1.20
1.12
1.04
0.96
0.88
0.80
1.04
0.96
0.88
0.80
-50
-25
0
25 50 75 100 125
Junction T emperature ( ℃)
Figure 10. ShutDown Feedback Voltage vs. Temp
-50
0
25
50
75
100 125
Figure 13. ShutDown Delay Current vs. Temp
Burst Mode Disable Voltage
(Normalized to 25℃)
1.20
1.12
1.04
0.96
0.88
0.80
1.12
1.04
0.96
0.88
0.80
-50
-25
0
25
50
75
100 125
-50
Junction T emperature ( ℃)
Figure 11. Burst Mode Enable Voltage vs. Temp
-25
0
25
50
75
100 125
Junction T emperature (℃)
Figure 14. Burst Mode Disable Voltage vs. Temp
1.20
Operating Supply Current
(Normalized to 25℃)
1.20
Maximum Drain Current
(Normalized to 25℃)
-25
Junction T emperature (℃)
1.20
Burst Mode Enable Voltage
(Normalized to 25℃)
1.12
1.12
1.04
0.96
0.88
0.80
1.12
1.04
0.96
0.88
0.80
-50
-25
0
25
50
75
100 125
Junction T emperature ( ℃)
Figure 12. Macimum Drain Current vs. Temp
-50
-25
0
25
50
75
100 125
Junction T emperature (℃)
Figure 15. Operating Supply Current vs. Temp
9
FSCM0765R
Functional Description
1. Startup: Figure 16 shows the typical startup circuit and
transformer auxiliary winding for the FSCM0765R
application. Before the FSCM0765R begins switching, it
consumes only startup current (typically 25uA) and the
current supplied from the DC link supply current consumed
by the FPS (Icc), and charges the external capacitor (Ca) that
is connected to the Vcc pin. When Vcc reaches start voltage
of 12V (VSTART), the FSCM0765R begins switching, and the
current consumed by FSCM0765R increases to 3mA. Then,
the FSCM0765R continues its normal switching operation
and the power required for this device is supplied from the
transformer auxiliary winding, unless Vcc drops below the
stop voltage of 8V (VSTOP). To guarantee the stable operation
of the control IC, Vcc has under voltage lockout (UVLO)
with 4V hysteresis. Figure 17 shows the relation between the
current consumed by the FPS (Icc) and the supply voltage
(Vcc).
C DC
Rstr
Da
VC C
FSCM 0765R
min
= ( 2 ⋅ V line
min
1
R str
– V start ) ⋅ ------------
where Vlinemin is the minimum input voltage, Vstart is the
start voltage (12V) and Rstr is the startup resistor. The startup
resistor should be chosen so that Isupmin is larger than the
maximum startup current (40uA). If not, Vcc can not be
charged to the start voltage and FPS will fail to start up.
2. Feedback Control: The FSCM0765R employs current
mode control, as shown in Figure 18. An opto-coupler (such
as the H11A817A) and a shunt regulator (such as the
KA431) are typically used to implement the feedback
network. Comparing the feedback voltage with the voltage
across the Rsense resistor makes it possible to control the
switching duty cycle. When the reference pin voltage of the
KA431 exceeds the internal reference voltage of 2.5V, the
H11A817A LED current increases, thus pulling down the
feedback voltage and reducing the duty cycle. This event
typically happens when the input voltage is increased or the
output load is decreased.
2.1 Pulse-by-pulse Current Limit: Because current mode
control is employed, the peak current through the SenseFET
is determined by the inverting input of the PWM comparator
(Vfb*) as shown in Figure 18. When the current through the
opto transistor is zero and the current limit pin (#5) is left
floating, the feedback current source (IFB) of 0.9mA flows
only through the internal resistor (R+2.5R=2.8k). In this
case, the cathode voltage of diode D2 and the peak drain
current have maximum values of 2.5V and 3A, respectively.
The pulse-by-pulse current limit can be adjusted using a
resistor to GND on the current limit pin (#5). The current
limit level using an external resistor (RLIM) is given by:
AC line
(Vline min - V line max )
ISUP
I sup
IC C
Ca
R LIM ⋅ 3A
I LIM = -----------------------------------2.8k Ω + R LIM
Figure 16. Startup Circuit
ICC
Vcc
Vref
Idelay
IFB 0.9mA
Vfb
Vo
4
H11A817A
SenseFET
OSC
D1
CB
D2
2.5R
0.3k
+
Vfb*
3mA
KA431
Power Down
6
Gate
driver
R
-
RLI M
Power Up
VSD
25uA
OLP
Rsense
VCC
Vstop=8V
Vstart=12V
Vz
Figure 18. Pulse Width Modulation (PWM) Circuit
Figure 17. Relation Between Operating Supply Current
and Vcc Voltage
The minimum current supplied through the startup resistor is
given by
10
FSCM0765R
2.2 Leading Edge Blanking (LEB): At the instant the
internal SenseFET is turned on, there usually exists a high
current spike through the SenseFET, caused by primary-side
capacitance and secondary-side rectifier reverse recovery.
Excessive voltage across the Rsense resistor can lead to
incorrect feedback operation in the current mode PWM
control. To counter this effect, the FSCM0765R employs a
leading edge blanking (LEB) circuit. This circuit inhibits the
PWM comparator for a short time (TLEB) after the SenseFET
is turned on.
3. Protection Circuit: The FSCM0765R has several self
protective functions such as over load protection (OLP), over
voltage protection (OVP) and thermal shutdown (TSD).
Because these protection circuits are fully integrated into the
IC without external components, the reliability can be
improved without increasing cost. Once the fault condition
occurs, switching is terminated and the SenseFET remains
off. This causes Vcc to fall. When Vcc reaches the UVLO
stop voltage of 8V, the current consumed by the
FSCM0765R decreases to the startup current (typically
25uA) and the current supplied from the DC link charges the
external capacitor (Ca) that is connected to the Vcc pin.
When Vcc reaches the start voltage of 12V, the FSCM0765R
resumes its normal operation. In this manner, the auto-restart
can alternately enable and disable the switching of the power
SenseFET until the fault condition is eliminated (see Figure
19).
To avoid this undesired operation, the over load protection
circuit is designed to be activated after a specified time to
determine whether it is a transient situation or an overload
situation. Because of the pulse-by-pulse current limit
capability, the maximum peak current through the SenseFET
is limited, and therefore the maximum input power is
restricted with a given input voltage. If the output consumes
beyond this maximum power, the output voltage (Vo)
decreases below the set voltage. This reduces the current
through the opto-coupler LED, which also reduces the optocoupler transistor current, thus increasing the feedback
voltage (Vfb). If Vfb exceeds 2.5V, D1 is blocked and the
5.3uA current source (Idelay) starts to charge CB slowly up to
Vcc. In this condition, Vfb continues increasing until it
reaches 6V, when the switching operation is terminated as
shown in Figure 20. The delay time for shutdown is the time
required to charge CB from 2.5V to 6.0V with 5.3uA (Idelay).
In general, a 10 ~ 50 ms delay time is typical for most
applications.
V FB
Over Load Protection
6.0V
2.5V
Vds
Power
on
Fault
occurs
T 12 = Cfb*(6.0-2.5)/Idelay
Fault
removed
T1
T2
t
Figure 20. Over Load Protection
Vcc
12V
8V
t
Normal
Operation
Fault
Situation
Normal
Operation
Figure 19. Auto Restart Operation
3.1 Over Load Protection (OLP): Overload is defined as
the load current exceeding a pre-set level due to an
unexpected event. In this situation, the protection circuit
should be activated to protect the SMPS. However, even
when the SMPS is in the normal operation, the over load
protection circuit can be activated during the load transition.
11
3.2 Over Voltage Protection (OVP): If the secondary side
feedback circuit were to malfunction or a solder defect
caused an open in the feedback path, the current through the
opto-coupler transistor becomes almost zero. Then, Vfb
climbs up in a similar manner to the over load situation,
forcing the preset maximum current to be supplied to the
SMPS until the over load protection is activated. Because
more energy than required is provided to the output, the
output voltage may exceed the rated voltage before the over
load protection is activated, resulting in the breakdown of the
devices in the secondary side. To prevent this situation, an
over voltage protection (OVP) circuit is employed. In
general, Vcc is proportional to the output voltage and the
FSCM0765R uses Vcc instead of directly monitoring the
output voltage. If VCC exceeds 19V, an OVP circuit is
activated resulting in the termination of the switching
operation. To avoid undesired activation of OVP during
normal operation, Vcc should be designed to be below 19V.
FSCM0765R
3.3 Thermal Shutdown (TSD): The SenseFET and the
control IC are built in one package. This makes it easy for
the control IC to detect the heat generation from the
SenseFET. When the temperature exceeds approximately
145°C, the thermal protection is triggered resulting in
shutdown of the FPS.
4. Frequency Modulation: EMI reduction can be
accomplished by modulating the switching frequency of a
switched power supply. Frequency modulation can reduce
EMI by spreading the energy over a wider frequency range
than the band width measured by the EMI test equipment.
The amount of EMI reduction is directly related to the depth
of the reference frequency. As can be seen in Figure 21, the
frequency changes from 63KHz to 69KHz in 4ms.
feedback voltage drops below VBL (300mV). At this point
switching stops and the output voltages start to drop at a rate
dependent on standby current load. This causes the feedback
voltage to rise. Once it passes VBH (500mV), switching
resumes. The feedback voltage then falls, and the process
repeats. Burst mode operation alternately enables and
disables switching of the power SenseFET, thereby reducing
switching loss in standby mode.
Vo
Voset
VFB
0.5V
0.3V
Drain Current
Ids
Ts
Ts
Vds
Ts
fs
time
Switching
disabled
69kHz
66kHz
63kHz
T1
T2 T3
Switching
disabled
T4
Figure 22. Waveforms of Burst Operation
4ms
t
Figure 21. Frequency Modulation
5. Soft Start: The FSCM0765R has an internal soft start
circuit that increases PWM comparator inverting input
voltage together with the SenseFET current slowly after it
starts up. The typical soft start time is 15ms. The pulse width
to the power switching device is progressively increased to
establish the correct working conditions for transformers,
rectifier diodes and capacitors. The voltage on the output
capacitors is progressively increased with the intention of
smoothly establishing the required output voltage.
Preventing transformer saturation and reducing stress on the
secondary diode during start up is also helpful.
6. Burst Operation: To minimize power dissipation in
standby mode, the FSCM0765R enters into burst mode
operation at light load condition. As the load decreases, the
feedback voltage decreases. As shown in Figure 22, the
device automatically enters into burst mode when the
12
FSCM0765R
Typical application circuit
Application
Output Power
LCD Monitor
40W
Input Voltage
Output Voltage (Max Current)
Universal Input
5V (2.0A)
(85-265Vac)
12V (2.5A)
Features
•
•
•
•
•
•
High efficiency (>81% at 85Vac input)
Low standby mode power consumption (<1W at 240Vac input and 0.4W load)
Low component count
Enhanced system reliability through various protection functions
Low EMI through frequency modulation
Internal soft-start (15ms)
Key Design Notes
• Resistors R102 and R105 are employed to prevent start-up at low input voltage
• The delay time for over load protection is designed to be about 50ms with C106 of 47nF. If a faster triggering of OLP is
required, C106 can be reduced to 22nF.
1. Schematic
D202
T1
EER3016 MBRF10100
C103
100uF
400V
BD101
2
2KBP06M3N257
1
D101
UF 4007
10
1
R102
500kΩ
C104
2.2nF
1kV
R103
56kΩ
2W
L20
1
2
12V,
2.5A
C202
1000u
F
25V
C201
1000uF
25V
8
R105
500kΩ
3
FSCM0765R
6
3
Ilimit
R106
5kΩ
1/4W
4
C102
220nF
275VA
C
C106
47nF
50V
Drain
1
D201
MBRF1045
5 N.C
4 Vf
b GND
2
Vcc 3
ZD10
1
22V
C105 D102
22uF TVR10G
50V
R104
5Ω
4
L20
2
5V, 2A
7
C204
1000u
F
10V
C203
1000uF
10V
6
5
C301
4.7n
F
LF101
23mH
R201
1kΩ
R101
560kΩ
1W
RT1
5D-9
C101
220nF
275VA
C
R202
1.2kΩ
IC301
H11A817A
F1
FUSE
250V
2A
IC201
KA431
R204
5.6kΩ
R203
10kΩ
C205
47nF
R205
5.6kΩ
Figure 23. Demo Circuit
13
FSCM0765R
2. Transformer
EER3016
Np/2
1
10 N
12V
2
9
3
8
4
7
Na 5
6
Np/2
N5V
Figure 24. Transformer Schematic Diagram
3.Winding Specification
No
Na
Pin (s→f)
4→5
Wire
0.2φ
×1
Turns
Winding Method
8
Center Winding
18
Solenoid Winding
7
Center Winding
3
Center Winding
18
Solenoid Winding
Insulation: Polyester Tape t = 0.050mm, 2Layers
Np/2
2→1
0.4φ × 1
Insulation: Polyester Tape t = 0.050mm, 2Layers
N12V
10 → 8
0.3φ × 3
Insulation: Polyester Tape t = 0.050mm, 2Layers
N5V
7→6
0.3φ × 3
Insulation: Polyester Tape t = 0.050mm, 2Layers
Np/2
3→2
0.4φ × 1
Outer Insulation: Polyester Tape t = 0.050mm, 2Layers
4.Electrical Characteristics
Pin
Specification
Remarks
Inductance
1-3
520uH ± 10%
100kHz, 1V
Leakage Inductance
1-3
10uH Max
2nd all Short
5. Core & Bobbin
Core: EER 3016
Bobbin: EER3016
Ae(mm2): 96
14
FSCM0765R
6. Demo Circuit Part List
Part
Value
Note
Fuse
F101
Part
Value
Note
C301
4.7nF
Polyester Film Cap.
2A/250V
NTC
RT101
Inductor
5D-9
Resistor
L201
5uH
Wire 1.2mm
L202
5uH
Wire 1.2mm
R101
560K
1W
R102
500K
1/4W
R103
56K
2W
R104
5
1/4W
R105
500K
1/4W
D101
UF4007
R106
5K
1/4W
D102
TVR10G
R201
1K
1/4W
D201
MBRF1045
R202
10K
1/4W
D202
MBRF10100
R203
1.2K
1/4W
R204
5.6K
1/4W
R205
5.6K
1/4W
Diode
Bridge Diode
BD101
2KBP06M 3N257
LF101
23mH
Bridge Diode
Capacitor
C101
220nF/275VAC
Box Capacitor
C102
220nF/275VAC
Box Capacitor
C103
100uF/400V
Electrolytic Capacitor
C104
10nF/1kV
Ceramic Capacitor
IC101
FSCM0765R
FPSTM
C105
22uF/50V
Electrolytic Capacitor
IC201
KA431(TL431)
Voltage Reference
IC301
H11A817A
Opto-coupler
C106
47nF/50V
Ceramic Capacitor
C201
1000uF/25V
Electrolytic Capacitor
C202
1000uF/25V
Electrolytic Capacitor
C203
1000uF/10V
Electrolytic Capacitor
C204
1000uF/10V
Electrolytic Capacitor
C205
47nF/50V
Ceramic Capacitor
Line Filter
Wire 0.4mm
IC
15
FSCM0765R
Package Dimensions
D2-PAK-6L
A
1.40
1.00
10.10
9.70
MIN 9.50
9.40
9.00
MIN 9.00
(0.75)
5.10
4.70 MAX1.10
MAX0.80
10.00
MIN 4.00
0.70
0.50
2.19
MIN 0.85
1.75
2.19
1.27
1.27
3.81
1.75
10.20
9.80
B
4.70
4.30
(8.58)
(4.40)
R0.45
1.40
1.25
(1.75)
(0.90)
(7.20)
15.60
15.00
SEE
DETAIL A
NOTES: UNLESS OTHERWISE SPECIFIED
A) THIS PACKAGE DOES NOT COMPLY
TO ANY CURRENT PACKAGING STANDARD.
B) ALL DIMENSIONS ARE IN MILLIMETERS.
C) DIMENSIONS ARE EXCLUSIVE OF BURRS,
MOLD FLASH, AND TIE BAR EXTRUSIONS.
D) DIMENSIONS AND TOLERANCES PER
ASME Y14.5M-1994
16
FSCM0765R
Package Dimensions (Continued)
I2-PAK-6L (Forming)
17
FSCM0765R
Package Dimensions (Continued)
Dimensions in Millimeters
TO-220-6L (Forming)
4.70
4.30
10.10
9.70
1.40
1.25
2.90
2.70
15.90
15.50
9.40
9.00
20.00
19.00
(13.55)
23.80
23.20
(0.65)
R0.55
(0.75)
R0.55
8.30 MAX1.10
7.30
2.60
2.20 (7.15)
MAX0.80
0.70
0.50
2.19
1.75
1.27
3.81
10.20
9.80
18
0.60
0.45
3.48
2.88
FSCM0765R
Ordering Information
Product Number
Package
FSCM0765RJ
D2-PAK-6L
FSCM0765RIWDTU
I2-PAK-6L
FSCM0765RGWDTU
TO-220-6L
Marking Code
BVdss
Rds(on) Max.
CM0765R
650V
1.6 Ω
19
FSCM0765R
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY
PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER
DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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© 2004 Fairchild Semiconductor Corporation