FSD146MRBN — Green-Mode Fairchild Power Switch (FPS™)
October 2011
FSD146MRBN
Green-Mode Fairchild Power Switch (FPS™)
Features
Advanced Soft Burst-Mode Operation for
Low Standby Power and Low Audible Noise
Random Frequency Fluctuation for Low EMI
Pulse-by-Pulse Current Limit
Various Protection Functions: Overload Protection
(OLP), Over-Voltage Protection (OVP), Abnormal
Over-Current Protection (AOCP), Internal Thermal
Shutdown (TSD) with Hysteresis, Output-Short
Protection (OSP), and Under-Voltage Lockout
(UVLO) with Hysteresis
Low Operating Current (0.4mA) in Burst Mode
Internal Startup Circuit
Internal High-Voltage SenseFET: 650V
Built-in Soft-Start: 15ms
Auto-Restart Mode
Description
The FSD146MRBN is an integrated Pulse Width
Modulation (PWM) controller and SenseFET designed
for offline Switch-Mode Power Supplies (SMPS) with
minimal external components. The PWM controller
includes an integrated fixed-frequency oscillator, Under-
Voltage Lockout (UVLO), Leading-Edge Blanking (LEB),
optimized gate driver, internal soft-start, temperature-
compensated precise current sources for loop
compensation, and self-protection circuitry. Compared
with a discrete MOSFET and PWM controller solution,
the FSD146MRBN can reduce total cost, component
count, size, and weight; while simultaneously increasing
efficiency, productivity, and system reliability. This
device provides a basic platform that is well suited for
cost-effective design of a flyback converter.
Applications
Power Supply for LCD Monitor, STB, and
DVD Combination
Ordering Information
Output Power Table
(2)
Part
Number
Operating
Current R
DS(ON)
Package Junction
Limit (Max.)
Temperature
8-DIP
-40°C
~
+125°C
1.50A
2.6
230V
AC
± 15%
(3)
Adapter
(4)
23W
85-265V
AC
Open
Open
(4)
(5)
Adapter
Frame
(5)
Frame
35W
17W
26W
Replaces
Device
FSD146MRBN
FSFM260N
Notes:
1. Lead-free package per JEDEC J-STD-020B.
2. The junction temperature can limit the maximum output power.
3. 230V
AC
or 100/115V
AC
with voltage doubler.
4. Typical continuous power in a non-ventilated enclosed adapter measured at 50C ambient temperature.
5. Maximum practical continuous power in an open-frame design at 50C ambient temperature.
© 2011 Fairchild Semiconductor Corporation
FSD146MRBN • Rev. 1.0.0
www.fairchildsemi.com
FSD146MRBN — Green-Mode Fairchild Power Switch (FPS™)
Application Circuit
Figure 1. Typical Application Circuit
Internal Block Diagram
Figure 2. Internal Block Diagram
© 2011 Fairchild Semiconductor Corporation
FSD146MRBN • Rev. 1.0.0
www.fairchildsemi.com
2
FSD146MRBN — Green-Mode Fairchild Power Switch (FPS™)
Pin Configuration
Figure 3. Pin Configuration (Top View)
Pin Definitions
Pin #
1
2
Name
GND
V
CC
Description
Ground.
This pin is the control ground and the SenseFET source.
Power Supply.
This pin is the positive supply input, which provides the internal operating
current for both startup and steady-state operation.
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 7.0V, the
overload protection triggers, which shuts down the FPS™.
No Connection
SenseFET Drain.
High-voltage power SenseFET drain connection.
3
4
5, 6, 7, 8
FB
N.C.
Drain
© 2011 Fairchild Semiconductor Corporation
FSD146MRBN • Rev. 1.0.0
www.fairchildsemi.com
3
FSD146MRBN — Green-Mode Fairchild Power Switch (FPS™)
Absolute Maximum Ratings
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
V
DS
V
CC
V
FB
I
DM
I
DS
E
AS
P
D
T
J
T
STG
ESD
Drain Pin Voltage
V
CC
Pin Voltage
Feedback Pin Voltage
Drain Current Pulsed
Parameter
Min.
Max.
650
26
Unit
V
V
V
A
A
A
mJ
W
C
C
C
kV
-0.3
T
C
=25C
T
C
=100C
10.0
3.4
1.7
1.1
250
1.5
150
Continuous Switching Drain Current
(6)
Single Pulsed Avalanche Energy
(7)
Total Power Dissipation (T
C
=25C)
Maximum Junction Temperature
Operating Junction Temperature
(9)
Storage Temperature
Electrostatic
Discharge Capability
(8)
-40
-55
+125
+150
5
2
Human Body Model, JESD22-A114
Charged Device Model, JESD22-C101
Notes:
6. Repetitive peak switching current when the inductive load is assumed: Limited by maximum duty (D
MAX
=0.73)
and junction temperature
(see Figure 4).
7. L=45mH, starting T
J
=25C.
8. Infinite cooling condition
(refer to the SEMI G30-88).
9. Although this parameter guarantees IC operation, it does not guarantee all electrical characteristics.
Figure 4. Repetitive Peak Switching Current
Thermal Impedance
T
A
=25°C unless otherwise specified.
Symbol
θ
JA
Ψ
JL
Parameter
Junction-to-Ambient Thermal Impedance
(10)
Junction-to-Lead Thermal Impedance
(11)
Value
85
11
Unit
°C/W
°C/W
Notes:
10. JEDEC recommended environment, JESD51-2, and test board, JESD51-10, with minimum land pattern.
11. Measured on the SOURCE pin #7, close to the plastic interface.
© 2011 Fairchild Semiconductor Corporation
FSD146MRBN • Rev. 1.0.0
www.fairchildsemi.com
4
FSD146MRBN — Green-Mode Fairchild Power Switch (FPS™)
Electrical Characteristics
T
J
= 25C unless otherwise specified.
Symbol
SenseFET Section
BV
DSS
I
DSS
R
DS(ON)
C
ISS
C
OSS
t
r
t
f
t
d(on)
t
d(off)
f
S
f
S
D
MAX
D
MIN
I
FB
V
START
V
STOP
t
S/S
V
RECOMM
V
BURH
V
BURL
V
HYS
Protection Section
I
LIM
V
SD
I
DELAY
t
LEB
V
OVP
t
OSP
V
OSP
t
OSP_FB
TSD
T
HYS
Parameter
Drain-Source Breakdown Voltage
Zero-Gate-Voltage Drain Current
Drain-Source On-State Resistance
Input Capacitance
Rise Time
Fall Time
Turn-On Delay
Turn-Off Delay
Switching Frequency
(12)
Switching Frequency Variation
(12)
Maximum Duty Ratio
Minimum Duty Ratio
Feedback Source Current
UVLO Threshold Voltage
Internal Soft-Start Time
Recommended V
CC
Range
(12)
Conditions
V
CC
= 0V, I
D
= 250A
V
DS
= 650V, T
A
= 25C
V
GS
=10V, I
D
=1A
V
DS
= 25V, V
GS
= 0V, f=1MHz
V
DS
= 25V, V
GS
= 0V, f=1MHz
V
DS
= 325V, I
D
= 4A, R
G
=25Ω
V
DS
= 325V, I
D
= 4A, R
G
=25Ω
V
DS
= 325V, I
D
= 4A, R
G
=25Ω
V
DS
= 325V, I
D
= 4A, R
G
=25Ω
V
CC
= 14V, V
FB
= 4V
-25C
< T
J
< 125C
V
CC
= 14V, V
FB
= 4V
V
CC
= 14V, V
FB
= 0V
V
FB
= 0
V
FB
= 0V, V
CC
Sweep
After Turn-On, V
FB
= 0V
V
STR
= 40V, V
CC
Sweep
Min.
650
Typ.
Max.
Unit
V
250
2.1
436
65
24
24
13
30
61
61
65
11
7.0
13
0.45
0.50
0.35
150
67
±5
67
90
12
7.5
15
23
0.55
0.40
73
±10
73
0
115
13
8.0
2.6
A
Ω
pF
pF
ns
ns
ns
ns
kHz
%
%
%
A
V
V
ms
V
V
V
mV
Output Capacitance
(12)
Control Section
Burst-Mode Section
Burst-Mode Voltage
V
CC
= 14V, V
FB
Sweep
0.30
Peak Drain Current Limit
Shutdown Feedback Voltage
Shutdown Delay Current
Leading-Edge Blanking Time
Over-Voltage Protection
Output-Short
(12)
Protection
Threshold Time
Threshold V
FB
V
FB
Blanking Time
Thermal Shutdown Temperature
(12)
(12,14)
di/dt = 300mA/s
V
CC
= 14V, V
FB
Sweep
V
CC
= 14V, V
FB
= 4V
V
CC
Sweep
OSP Triggered when
t
ON
<t
OSP
& V
FB
>V
OSP
(Lasts Longer than t
OSP_FB
)
Shutdown Temperature
Hysteresis
1.35
6.45
1.2
23.0
0.7
1.8
2.0
125
1.50
7.00
2.0
300
24.5
1.0
2.0
2.5
135
60
1.65
7.55
2.8
26.0
1.3
2.2
3.0
145
A
V
A
ns
V
s
V
s
C
C
Continued on the following page…
© 2011 Fairchild Semiconductor Corporation
FSD146MRBN • Rev. 1.0.0
www.fairchildsemi.com
5
Embedded System
京公网安备 11010802033920号
EEWORLD
