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Features
Description
Internal Avalanche-Rugged SenseFET
The FSDM0465RE, FSDM0565RE and FSDM07652RE
are 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 that
combines an avalanche-rugged SenseFET with a
current mode PWM control block. The PWM controller
includes an integrated fixed-frequency oscillator, undervoltage 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.
Advanced Burst-Mode Operation Consumes Under
1W at 240VAC & 0.5W load
Precision Fixed Operating Frequency (66kHz)
Internal Start-up Circuit
Improved Pulse-by-Pulse Current Limiting
Over-Voltage Protection (OVP)
Overload Protection (OLP)
Internal Thermal Shutdown Function (TSD)
Auto-Restart Mode
Under-Voltage Lockout (UVLO) with hysteresis
Low Operating Current (2.5mA)
Built-in Soft-Start
Applications
SMPS for LCD monitor and STB
Adaptor
Ordering Information
Product Number
Package
Marking Code
BVDSS
RDS(ON) Max.
FSDM0465REWDTU(1)
TO-220F-6L (Forming)
DM0465RE
650V
2.6 Ω
FSDM0565REWDTU
TO-220F-6L (Forming)
DM0565RE
650V
2.2 Ω
FSDM07652REWDTU
TO-220F-6L (Forming)
DM07652RE
650V
1.6 Ω
Note:
1. WDTU: Forming Type.
All packages are lead free per JEDEC: J-STD-020B standard.
© 2006 Semiconductor Components Industries, LLC.
October-2017, Rev. 2
Publication Order Number:
FSDM0465RE/D
FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Power Switch
FSDM0465RE, FSDM0565RE, FSDM07652RE
Green Mode Power Switch
AC
IN
DC
OUT
Vstr
Drain
PWM
VCC
FB
Source
FSDM0565RE Rev: 00
Figure 1. Typical Flyback Application
Output Power Table
Product
230VAC ±15%(4)
Adapter(2)
Open
Frame(3)
85–265VAC
Adapter(2)
Open Frame(3)
FSDM0465RE
48W
56W
40W
48W
FSDM0565RE
60W
70W
50W
60W
FSDM07652RE
70W
80W
60W
70W
Notes:
2. Typical continuous power in a non-ventilated enclosed adapter measured at 50°C ambient.
3. Maximum practical continuous power in an open-frame design at 50°C ambient.
4. 230VAC or 100/115VAC with doubler.
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FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Power Switch
Typical Circuit
VCC
Vstr
3
6
NC 5
Drain
1
Istart
0.5/0.7V
+
Vref
8V/12V
VCC
Idelay
VCC good
Internal
Bias
Vref
OSC
IFB
2.5R
PWM
S
Q
R
Q
FB 4
Soft-start
Gate
driver
R
LEB
VSD
VCC
2 GND
S
Q
R
Q
Vovp
TSD
VCC good
VCL
FSDM0565RE Rev: 00
Figure 2. Functional Block Diagram of FSDM0x65RE
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3
FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Power Switch
Internal Block Diagram
TO-220F-6L
6. Vstr
5. NC
4. FB
3. VCC
2. GND
1. Drain
Figure 3. Pin Configuration (Top View)
Pin Definitions
Pin #
Name
Description
1
Drain
SenseFET drain. This pin is the high-voltage power SenseFET drain. It is designed to drive the transformer directly.
2
GND
Ground. This pin is the control ground and the SenseFET source.
VCC
Power Supply. This pin is the positive supply voltage input. During start-up,
the power is supplied by an internal high-voltage current source connected to
the Vstr pin. When VCC reaches 12V, the internal high-voltage current source
is disabled and the power is supplied from the auxiliary transformer winding.
4
FB
Feedback. This pin is internally connected to the inverting input of the PWM
comparator. The collector of an opto-coupler 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 overload protection is activated,
re-sulting in shutdown of the Power Switch.
5
NC
No Connection.
Vstr
Start-up. This pin is connected directly to the high-voltage DC link. At start-up,
the internal high-voltage current source supplies internal bias and charges the
external capacitor connected to the VCC pin. Once VCC reaches 12V, the internal current source is disabled.
3
6
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4
FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Power Switch
Pin Configuration
The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The
device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables
are not guaranteed at the absolute maximum ratings. TA = 25°C, unless otherwise specified.
Symbol
Value
Unit
Drain Source Breakdown Voltage
650
V
Vstr
Max. Voltage at Vstart pin
650
V
IDM
Drain Current Pulsed(5)
BVDSS
Parameter
FSDM0465RE
TC=25°C
9.6
FSDM0565RE
TC=25°C
11
FSDM07652RE
TC=25°C
15
TC=25°C
2.2
TC=100°C
1.4
TC=25°C
2.8
TC=100°C
1.7
TC=25°C
3.8
TC=100°C
2.4
FSDM0465RE
ID
Continuous Drain Current FSDM0565RE
FSDM07652RE
ADC
A
FSDM0465RE
EAS
Single Pulsed Avalanche Energy(6)
FSDM0565RE
190
FSDM07652RE
370
mJ
VCC
Supply Voltage
20
V
VFB
Input Voltage Range
-0.3 to VCC
V
PD(Watt H/S) Total Power Dissipation (TC=25°C)
45
W
Internally limited
°C
TJ
Operating Junction Temperature
TA
Operating Ambient Temperature
-25 to +85
°C
Storage Temperature
-55 to +150
°C
ESD Capability, HBM Model
(All pins except Vstr and FB)
2.0
(GND-Vstr/VFB=1.5kV)
kV
ESD Capability, Machine Model
(All pins except Vstr and FB)
300
(GND-Vstr/VFB=225V)
V
Value
Unit
TSTG
Notes:
5. Repetitive rating: Pulse width limited by maximum junction temperature.
6. L=14mH, starting TJ=25°C.
Thermal Impedance
TA=25°C, unless otherwise specified.
Symbol
Parameter
θJA
Junction-to-Ambient Thermal Resistance
49.90
°C/W
θJC(8)
Junction-to-Case Thermal Resistance
2.78
°C/W
(7)
Notes:
7. Free-standing, with no heat-sink, under natural convection.
8. Infinite cooling condition - refer to the SEMI G30-88.
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FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Power Switch
Absolute Maximum Ratings
TA = 25°C unless otherwise specified.
Symbol
Parameter
Condition
Min. Typ. Max. Unit
SenseFET SECTION
FSDM0465RE
IDSS
Zero Gate Voltage
Drain Current
FSDM0565RE
FSDM07652RE
VDS = 650V, VGS = 0V
250
VDS = 520V, VGS = 0V, TC = 125°C
250
VDS = 650V, VGS = 0V
500
VDS = 520V, VGS = 0V, TC = 125°C
500
VDS = 650V, VGS = 0V
500
VDS = 520V, VGS = 0V, TC = 125°C
500
2.20
2.60
1.76
2.20
FSDM07652RE
1.40
1.60
FSDM0465RE
60
FSDM0465RE
RDS(ON)
COSS
Static Drain Source
on Resistance(9)
Output Capacitance
FSDM0565RE
FSDM0565RE
VGS = 10V, ID = 2.5A
VGS = 0V, VDS = 25V, f = 1MHz
78
FSDM07652RE
tr
td(off)
tf
Turn-On Delay Time
Rise Time
Turn-Off Delay Time
Fall Time
FSDM0565RE
22
22
FSDM0465RE
20
VDD = 325V, ID = 5A
60
FSDM0465RE
65
VDD = 325V, ID = 5A
ns
95
FSDM07652RE
115
FSDM0465RE
27
FSDM0565RE
ns
52
FSDM07652RE
FSDM0565RE
pF
23
VDD = 325V, ID = 5A
FSDM07652RE
FSDM0565RE
Ω
100
FSDM0465RE
td(on)
µA
VDD = 325V, ID = 5A
ns
50
FSDM07652RE
ns
65
CONTROL SECTION
fOSC
ΔfSTABLE
ΔfOSC
IFB
DMAX
Switching Frequency
Switching Frequency Stability
Switching Frequency Variation
(10)
Feedback Source Current
VFB = 3V
60
66
72
kHz
13V ≤ VCC ≤ 18V
0
1
3
%
-25°C ≤ TA ≤ 85°C
0
±5
±10
%
0.7
0.9
1.1
mA
FSDM0465RE
VFB = GND
77
82
87
%
Maximum Duty Cycle FSDM0565RE
77
82
87
%
75
80
85
%
0
%
VFB = GND
11
12
13
V
VFB = GND
7
8
9
V
10
15
ms
FSDM07652RE
DMIN
VSTART
VSTOP
tS/S
Minimum Duty Cycle
UVLO Threshold Voltage
Internal Soft-Start Time
VFB = 3
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6
FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Power Switch
Electrical Characteristics
TA = 25°C unless otherwise specified.
Symbol
Parameter
Condition
Min. Typ. Max. Unit
BURST MODE SECTION
VBURH
VBURL
Burst Mode Voltages
VCC = 14V
0.7
V
VCC = 14V
0.5
V
PROTECTION SECTION
VSD
IDELAY
tLEB
Shutdown Feedback Voltage
VFB ≥ 5.5V
5.5
Shutdown Delay Current
VFB = 5V
2.8
Leading-Edge Blanking Time
(11)
ILIMIT
Peak Current Limit
VOVP
Over-Voltage Protection
TSD
Thermal Shutdown
6.0
6.5
V
3.5
4.2
µA
250
ns
FSDM0465RE
VFB = 5V, VCC = 14V
1.60
1.80
2.00
FSDM0565RE
VFB = 5V, VCC = 14V
2.00
2.25
2.50
FSDM07652RE VFB = 5V, VCC = 14V
2.20
2.50
2.70
18
19
20
V
130
145
160
°C
2.5
5.0
mA
Temperature(10)
A
TOTAL DEVICE SECTION
VFB = GND, VCC = 14V
IOP
IOP(MIN)
IOP(MAX)
Operating Supply Current(12)
VFB = GND, VCC = 10V
VFB = GND, VCC = 18V
Notes:
9. Pulse test: Pulse width ≤ 300µS, duty cycle ≤ 2%.
10. These parameters, although guaranteed at the design, are not tested in production.
11. These parameters indicate the inductor current.
12. This parameter is the current flowing into the control IC.
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FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Power Switch
Electrical Characteristics (Continued)
Function
FS6M0765RTC
FSDM0x65RE
FSDM0x65RE Advantages
Gradually increasing current limit during
Soft-Start
soft-start reduces peak current and voltAdjustable soft-start
Internal soft-start with
age component stresses
time using an external typically 10ms (fixed)
Eliminates external soft-start components
capacitor
in most applications
Reduces or eliminates output overshoot
Built into controller Built into controller
Improves light-load efficiency
Burst-Mode Operation Output voltage
Output voltage fixed Reduces no-load consumption
drops to around half
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FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Power Switch
Comparison Between FS6M0765RTC and FSDM0x65RE
These characteristic graphs are normalized at TA= 25°C.
1.2
1.2
Start Thershold Voltage
(Vstart)
Operating Current
(I op)
1.0
0.8
0.6
0.4
0.2
1.0
0.8
0.6
0.4
0.2
0.0
0.0
-25
0
25
50
75
100
125
-25
150
0
Figure 4. Operating Current vs. Temp.
75
100
125
150
Figure 5. Start Threshold Voltage vs. Temp.
1.2
1.2
1.0
1.0
Operating Frequency
(f osc)
Stop Threshold Voltage
(Vstop)
50
Junction Temperature [°C]
Junction Temperature [°C]
0.8
0.6
0.4
0.2
0.0
0.8
0.6
0.4
0.2
0.0
-25
0
25
50
75
100
125
150
-25
0
Junction Temperature [°C]
25
50
75
100
125
150
Junction Temperature [°C]
Figure 6. Stop Threshold Voltage vs. Temp.
Figure 7. Operating Frequency vs. Temp.
1.2
1.2
1.0
1.0
FB Source Current
(I FB)
Maximum Duty Cycle
(D MAX)
25
0.8
0.6
0.4
0.2
0.8
0.6
0.4
0.2
0.0
0.0
-25
0
25
50
75
100
125
150
-25
Junction Temperature [°C]
Figure 8. Maximum Duty Cycle vs. Temp.
0
25
50
75
100
125
150
Junction Temperature [°C]
Figure 9. Feedback Source Current vs. Temp.
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9
FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Power Switch
Typical Performance Characteristics
These characteristic graphs are normalized at TA= 25°C.
1.2
1.0
Shutdown Delay Current
(I DELAY)
Shutdown FB Voltage
(VSD)
1.2
0.8
0.6
0.4
0.2
0.0
1.0
0.8
0.6
0.4
0.2
0.0
-25
0
25
50
75
100
125
150
-25
0
25
Junction Temperature [°C]
Figure 10. Shutdown Feedback Voltage vs. Temp.
75
100
125
150
Figure 11. Shutdown Delay Current vs. Temp.
FB Burst-Mode Enable Voltage
(VFBE)
Over-Voltage Protection
(Vovp)
1.2
1.0
0.8
0.6
0.4
0.2
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0.0
-25
0
25
50
75
100
125
-25
150
0
25
50
75
100
125
150
Junction Temperature [°C]
Junction Temperature [°C]
Figure 12. Over-Voltage Protection vs. Temp.
Figure 13. Burst-Mode Enable Voltage vs. Temp.
1.2
1.2
1.0
1.0
Peak Current Limit
(Self protection)
(I over)
FB Burst-Mode Disable Voltage
(VFBD)
50
Junction Temperature [°C]
0.8
0.6
0.4
0.2
0.8
0.6
0.4
0.2
0.0
0.0
-25
0
25
50
75
100
125
150
Junction Temperature [°C]
-50
-25
0
25
50
75
100
Junction Temperature [°C]
Figure 14. Burst-Mode Disable Voltage vs. Temp.
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10
Figure 15. Current Limit vs. Temp.
125
FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Power Switch
Typical Performance Characteristics (Continued)
These characteristic graphs are normalized at TA= 25°C.
1.2
Soft-Start Time
(Normalized to 25°C)
1.0
0.8
0.6
0.4
0.2
0.0
-50
-25
0
25
50
75
100
125
Junction Temperature [°C]
Figure 16. Soft-Start Time vs. Temp.
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11
FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Power Switch
Typical Performance Characteristics (Continued)
1.
Start-up:
In
previous
generations
of
Power Switches the VCC pin had an external startup resistor to the DC input voltage line. In this
generation, the start-up resistor is replaced by an
internal high-voltage current source. At start-up, the
internal high-voltage current source supplies the
internal bias and charges the external capacitor
(Cvcc) connected to the VCC pin, as illustrated
in Figure 17. When VCC reaches 12V, the
FSDM0x65RE begins switching and the internal highvoltage
current
source
is
disabled.
The
FSDM0x65RE continues normal switching operation and
the power is supplied from the auxiliary transformer
winding unless VCC goes below the stop voltage of 8V.
VDC
2.1 Pulse-by-Pulse Current Limit: Because currentmode control is employed, the peak current through the
SenseFET is limited by the inverting input of PWM
comparator (VFB*) as shown in Figure 18. Assuming that
the 0.9mA current source flows only through the internal
resistor (2.5R + R = 2.8kΩ), the cathode voltage of diode
D2 is about 2.5V. Since D1 is blocked when the feedback
voltage (VFB) exceeds 2.5V, the maximum voltage of the
cathode of D2 is clamped at this voltage, thus clamping
VFB*. Therefore, the peak value of the current through
the SenseFET is limited.
2.2 Leading Edge Blanking (LEB): At the instant the
internal SenseFET is turned on, a high-current spike
occurs through the SenseFET, caused by primary-side
capacitance and secondary-side rectifier reverse
recovery. Excessive voltage across the Rsense resistor
would lead to incorrect feedback operation in the current
mode PWM control. To counter this effect, the
FSDM0x65RE employs a leading-edge blanking (LEB)
circuit. This circuit inhibits the PWM comparator for a
short time (tLEB) after the SenseFET is turned on.
CVcc
Vref
VCC
Idelay
VCC
3
6
Vstr
VFB
VO
4
H11A817A
D1
CB
Istart
D2
+
Vfb*
Vref
8V/12V
IFB
KA431
2.5R
Gate
driver
R
-
VCC good
Internal
Bias
SenseFET
OSC
VSD
OLP
Rsense
FSDM0565RE Rev: 00
FSDM0565RE Rev: 00
Figure 18. Pulse-Width-Modulation (PWM) Circuit
Figure 17. Internal Start-up Circuit
2. Feedback Control: FSDM0x65RE employs currentmode control, as shown in Figure 18. An opto-coupler
(such as the H11A817A) and 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, plus an offset voltage,
makes it possible to control the switching duty cycle.
When the reference pin voltage of the shunt regulator
exceeds the internal reference voltage of 2.5V, the optocoupler LED current increases, pulling down the
feedback voltage and reducing the duty cycle. This event
typically occurs when the input voltage is increased or
the output load is decreased.
3. Protection Circuit: The FSDM0x65RE has several
self-protective functions, such as overload 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 is improved without increasing cost. Once a
fault condition occurs, switching is terminated and the
SenseFET remains off, which causes VCC to fall. When
VCC reaches the UVLO stop voltage of 8V, the protection
is reset and the internal high-voltage current source
charges the VCC capacitor via the Vstr pin. When VCC
reaches the UVLO start voltage of 12V, the
FSDM0x65RE resumes 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).
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12
FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Power Switch
Functional Description
Power
on
Fault
occurs
FSDM0565RE Rev: 00
VFB
Fault
removed
Overload protection
6.0V
2.5V
VCC
T12= CFB*(6.0-2.5)/Idelay
12V
T1
8V
Normal
operation
Fault
situation
Normal
operation
Figure 19. Auto Restart Operation
3.1 Overload 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. Even when the
SMPS is in normal operation, the overload protection
circuit can be activated during the load transition. To
avoid this undesired operation, the overload protection
circuit is designed to be activated after a specified time
to determine whether it is a transient situation or a true
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 optocoupler LED, which also reduces the opto-coupler
transistor current, thus increasing the feedback voltage
(VFB). If VFB exceeds 2.5V, D1 is blocked and the 3.5µA
current source 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 3.5µA.
A 10 ~ 50ms delay time is typical for most applications.
t
Figure 20. Overload Protection
t
FSDM0565RE Rev: 00
T2
3.2 Over-Voltage Protection (OVP): If the secondary
side feedback circuit were to malfunction or a solder
defect caused an opening in the feedback path, the
current through the opto-coupler transistor becomes
almost zero. In this event, VFB climbs in a similar manner
to the overload situation, forcing the preset maximum
current to be supplied to the SMPS until the overload
protection is activated. Because more energy than
required is provided to the output, the output voltage may
exceed the rated voltage before the overload protection
is activated, resulting in the breakdown of the devices in
the secondary side. To prevent this situation, an overvoltage protection (OVP) circuit is employed. In general,
VCC is proportional to the output voltage and the
FSDM0x65RE 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 below 19V.
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 ~150°C, the
thermal shutdown is activated.
4. Soft-Start: The FSDM0x65RE has an internal softstart circuit that increases PWM comparator inverting
input voltage, together with the SenseFET current,
slowly after it starts up. The typical soft-start time is
10ms. The pulse width to the power switching device is
progressively increased to establish the correct working
conditions for transformers, inductors, and capacitors.
The voltage on the output capacitors is progressively
increased with the intention of smoothly establishing the
required output voltage. It also helps prevent transformer
saturation and reduces the stress on the secondary
diode during start-up.
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13
FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Power Switch
VDS
Vo
VOset
VFB
0.7V
0.5V
IDS
VDS
time
Switching
disabled
FSDM0565RE Rev: 00
T1
T2 T3
Switching
disabled
T4
Figure 21. Waveforms of Burst Operation
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FSDM0465RE, FSDM0565RE, FSDM07652RE — Green Mode Power Switch
5. Burst Operation: To minimize power dissipation in
standby mode, the FSDM0x65RE enters burst-mode
operation. As the load decreases, the feedback voltage
decreases. As shown in Figure 21, the device
automatically enters burst mode when the feedback
voltage drops below VBURL(500mV). 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 VBURH (700mV),
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.
Application
Output Power
Input Voltage
Output Voltage (Max. Current)
LCD Monitor
40W
Universal input
(85-265VAC)
5V (2.0A)
12V (2.5A)
Features
High efficiency (>81% at 85VAC input)
Low zero load power consumption (
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