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FSD210, FSD200
Features
Green Mode Fairchild Power Switch (FPS
TM
)
• Single Chip 700V Sense FET Power Switch
• Precision Fixed Operating Frequency (134kHz)
• Advanced Burst-Mode operation Consumes under 0.1W
at 265Vac and no load (FSD210 only)
• Internal Start-up Switch and Soft Start
• Under Voltage Lock Out (UVLO) with Hysteresis
• Pulse by Pulse Current Limit
• Over Load Protection (OLP)
• Internal Thermal Shutdown Function (TSD)
• Auto-Restart Mode
• Frequency Modulation for EMI
• FSD200 does not require an auxiliary bias winding
OUTPUT POWER TABLE
230VAC
±15%
(3)
PRODUCT
FSD210
FSD200
FSD210M
FSD200M
Adapter
(1)
5W
5W
5W
5W
85-265VAC
Open
Open
(1)
(2)
Adapter
Frame
Frame
(2)
7W
7W
7W
7W
4W
4W
4W
4W
5W
5W
5W
5W
Applications
• Charger & Adaptor for Mobile Phone, PDA & MP3
• Auxiliary Power for White Goods, PC, C-TV & Monitor
Table 1. Notes: 1. Typical continuous power in a non-ven-
tilated 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.
Typical Circuit
Description
The FSD200 and FSD210 are integrated Pulse Width Modu-
lators (PWM) and Sense FETs specially designed for high
performance off-line Switch Mode Power Supplies (SMPS)
with minimal external components. Both devices are mono-
lithic high voltage power switching regulators which com-
bine an LDMOS Sense FET with a voltage mode PWM
control block. The integrated PWM controller features in-
clude: a fixed oscillator with frequency modulation for re-
duced EMI, Under Voltage Lock Out (UVLO) protection,
Leading Edge Blanking (LEB), optimized gate turn-on/turn-
off driver, thermal shut down protection (TSD), temperature
compensated precision current sources for loop compensa-
tion and fault protection circuitry. When compared to a dis-
crete MOSFET and controller or RCC switching converter
solution, the FSD200 and FSD210 reduce total component
count, design size, weight and at the same time increase effi-
ciency, productivity, and system reliability. The FSD200
eliminates the need for an auxiliary bias winding at a small
cost of increased supply power. Both devices are a basic plat-
form well suited for cost effective designs of flyback convert-
ers.
AC
IN
DC
OUT
Vstr
PWM
Vfb
Drain
Vcc
Source
Figure 1. Typical Flyback Application using FSD210
AC
IN
DC
OUT
Vstr
PWM
Vfb
Drain
Vcc
Source
Figure 2. Typical Flyback Application using FSD200
Rev.1.0.3
©2004 Fairchild Semiconductor Corporation
FSD210, FSD200
Internal Block Diagram
Vstr
8
Vcc 5
UVLO
Voltage
Ref
Internal
Bias
8.7/6.7V
Frequency
Modulation
5uA
250uA
L
H
7 Drain
Vck
OSC
DRIVER
S
Q
SFET
Vfb 4
BURST
R
V
BURST
LEB
OLP
Reset
S
R
TSD
Iover
Q
Vth
Rsense
V
SD
A/R
S/S
3mS
1, 2, 3
GND
Figure 3. Functional Block Diagram of FSD210
Vstr
8
Vcc 5
7V
HV/REG
UVLO
Voltage
Ref.
INTERNAL
BIAS
ON/OFF
7 Drain
Frequency
Modulation
5uA
250uA
Vck
OSC
DRIVER
S
Q
SFET
Vfb 4
BURST
R
V
BURST
LEB
OLP
Reset
S
R
TSD
Iover
Vth
Q
Rsense
V
SD
A/R
S/S
3mS
1, 2, 3
GND
Figure 4. Functional Block Diagram of FSD200 showing internal high voltage regulator
2
FSD210, FSD200
Pin Definitions
Pin Number
1, 2, 3
Pin Name
GND
Pin Function Description
Sense FET source terminal on primary side and internal control ground.
The feedback voltage pin is the inverting input to the PWM comparator with
nominal input levels between 0.5Vand 2.5V. It has a 0.25mA current source
connected internally while a capacitor and opto coupler are typically
connected externally. A feedback voltage of 4V triggers overload protection
(OLP). There is a time delay while charging between 3V and 4V using an
internal 5uA current source, which prevents false triggering under transient
conditions but still allows the protection mechanism to operate under true
overload conditions.
FSD210
Positive supply voltage input. Although connected to an auxiliary
transformer winding, current is supplied from pin 8 (Vstr) via an internal
switch during startup (see Internal Block Diagram section). It is not until Vcc
reaches the UVLO upper threshold (8.7V) that the internal start-up switch
opens and device power is supplied via the auxiliary transformer winding.
FSD200
This pin is connected to a storage capacitor. A high voltage regulator
connected between pin 8 (Vstr) and this pin, provides the supply voltage to
the FSD200 at startup and when switching during normal operation. The
FSD200 eliminates the need for auxiliary bias winding and associated
external components.
The Drain pin is designed to connect directly to the primary lead of the
transformer and is capable of switching a maximum of 700V. Minimizing the
length of the trace connecting this pin to the transformer will decrease
leakage inductance.
The startup pin connects directly to the rectified AC line voltage source for
both the FSD200 and FSD210. For the FSD210, at start up the internal
switch supplies internal bias and charges an external storage capacitor
placed between the Vcc pin and ground. Once this reaches 8.7V, the
internal current source is disabled. For the FSD200, an internal high voltage
regulator provides a constant supply voltage.
4
Vfb
5
Vcc
7
Drain
8
Vstr
Pin Configuration
7-DIP
7-LSOP
GND
GND
GND
Vfb
1
2
3
4
5
8
7
Vstr
Drain
Vcc
Figure 5. Pin Configuration (Top View)
3
FSD210, FSD200
Absolute Maximum Ratings
(Ta=25°C unless otherwise specified)
Parameter
Maximum Supply Voltage (FSD200)
Maximum Supply Voltage (FSD210)
Input Voltage Range
Operating Junction Temperature.
Operating Ambient Temperature
Storage Temperature Range
Symbol
V
CC,MAX
V
CC,MAX
V
FB
T
J
T
A
T
STG
Value
10
20
−0.3
to V
STOP
+150
−25
to +85
−55
to +150
Unit
V
V
V
°C
°C
°C
Thermal Impedance
Parameter
7DIP
Junction-to-Ambient Thermal
Junction-to-Case Thermal
7LSOP
Junction-to-Ambient Thermal
Junction-to-Case Thermal
Note:
1. Free standing without heat sink.
2. Measured on the GND pin close to plastic interface.
3. Soldered to 100mm
2
copper clad.
4. Soldered to 300mm
2
copper clad.
Symbol
Value
74.07
(3)
60.44
(4)
22.00
-
-
-
Unit
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
θ
JA
(1)
θ
JA
(1)
θ
JC
(2)
θ
JA
(1)
θ
JA
(1)
θ
JC
(2)
4
FSD210, FSD200
Electrical Characteristics
(Ta=25°C unless otherwise specified)
Parameter
Sense FET SECTION
Drain-Source Breakdown Voltage
Startup Voltage (Vstr) Breakdown
Off-State Current
On-State Resistance
Rise Time
Fall Time
CONTROL SECTION
Output Frequency
Output Frequency Modulation
Feedback Source Current
Maximum Duty Cycle
Minimum Duty Cycle
UVLO Threshold Voltage (FSD200)
UVLO Threshold Voltage (FSD210)
Supply Shunt Regulator (FSD200)
Internal Soft Start Time
BURST MODE SECTION
V
BURH
Burst Mode Voltage
PROTECTION SECTION
Drain to Source Peak Current Limit
Current Limit
Delay
(1)
Thermal Shutdown Temperature (Tj)
(1)
Shutdown Feedback Voltage
Feedback Shutdown Delay Current
Leading Edge Blanking Time
(2)
TOTAL DEVICE SECTION
Operating Supply Current (FSD200)
Operating Supply Current (FSD210)
Start Up Current (FSD200)
Start Up Current (FSD210)
Vstr Supply Voltage
I
OP
I
OP
I
START
I
START
Vcc = 7V
Vcc = 11V
Vcc = 0V
Vcc = 0V
Vcc = 0V
-
-
-
-
20
600
700
1
700
-
-
-
1.2
900
-
µA
µA
mA
µA
V
I
OVER
T
CLD
T
SD
V
SD
I
DELAY
T
LEB
Vfb = 4.0V
-
Tj = 25°C
0.275
-
125
3.5
3
200
0.320
220
145
4.0
5
-
0.365
-
160
4.5
7
-
A
ns
°C
V
µA
ns
V
BURL
Hysteresis
Tj = 25°C
0.58
0.5
-
0.64
0.58
60
0.7
0.64
-
V
V
mV
F
OSC
F
MOD
I
FB
D
MAX
D
MIN
V
START
V
STOP
V
START
V
STOP
V
CCREG
T
S/S
After turn on
-
After turn on
Tj = 25°C
Tj = 25°C
Vfb = 0V
Vfb = 3.5V
Vfb = 0V
126
-
0.22
60
0
6.3
5.3
8.0
6.0
-
-
134
±4
0.25
65
0
7
6
8.7
6.7
7
3
142
-
0.28
70
0
7.7
6.7
9.4
7.4
-
-
kHz
kHz
mA
%
%
V
V
V
V
V
ms
BV
DSS
BV
STR
I
DSS
R
DS(ON)
T
R
T
F
V
DS
= 560V
Tj = 25°C, I
D
= 25mA
Tj = 100°C, I
D
= 25mA
V
DS
= 325V, I
D
= 50mA
V
DS
= 325V, l
D
= 25mA
V
CC
= 0V, I
D
= 100µA
700
700
-
-
-
-
-
-
-
-
28
42
100
50
-
-
100
32
48
-
-
V
V
µA
Ω
Ω
ns
ns
Symbol
Condition
Min.
Typ.
Max.
Unit
Note:
1. These parameters, although guaranteed, are not 100% tested in production
2. This parameter is derived from characterization
5
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