2004 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev.1.0.4
Features
Internal Avalanche Rugged Sense FET
Consumes only 0.65W at 240VAC & 0.3W load with
Advanced Burst-Mode Operation
Frequency Modulation for low EMI
Precision Fixed Operating Frequency
Internal Start-up Circuit
Pulse by Pulse Current Limiting
Abnormal Over Current Protection
Over Voltage Protection
Over Load Protection
Internal Thermal Shutdown Function
Auto-Restart Mode
Under Voltage Lockout
Low Operating Current (3mA)
Adjustable Peak Current Limit
Built-in Soft Start
Applications
SMPS for VCR, SVR, STB, DVD & DVCD
SMPS for Printer, Facsimile & Scanner
Adaptor for Camcorder
Description
The FSDL0165RN is an integrated Pulse Width Modulator
(PWM) and Sense FET specifically designed for high perfor-
mance offline Switch Mode Power Supplies (SMPS) with
minimal external components. This device is an integrated
high voltage power switching regulator which combine an
avalanche rugged Sense FET with a current mode PWM
control block. The integrated PWM controller features
include: a fixed oscillator with frequency modulation for
reduced EMI, Under Voltage Lock Out (UVLO) protection,
Leading Edge Blanking (LEB), optimized gate turn-on/turn-
off driver, Thermal Shut Down (TSD) protection, Abnormal
Over Current Protection (AOCP) and temperature compen-
sated precision current sources for loop compensation and
fault protection circuitry. When compared to a discrete
MOSFET and controller or RCC switching converter solu-
tion, the FSDL0165RN reduce total component count,
design size, weight and at the same time increases efficiency,
productivity, and system reliability. This device is a basic
platform well suited for cost effective designs of flyback
converters.
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
Figure 1. Typical Flyback Application
OUTPUT POWER TABLE
PRODUCT
230VAC
15%
(3)
85-265VAC
Adapt-
er
(1)
Open
Frame
(2)
Adapt-
er
(1)
Open
Frame
(2)
FSDL321
11W
17W
8W
12W
FSDH321
11W
17W
8W
12W
FSDL0165RN
13W
23W
11W
17W
FSDM0265RN
16W
27W
13W
20W
FSDH0265RN
16W
27W
13W
20W
FSDL0365RN
19W
30W
16W
24W
FSDM0365RN
19W
30W
16W
24W
FSDL0165RL
13W
23W
11W
17W
FSDM0265RL
16W
27W
13W
20W
FSDH0265RL
16W
27W
13W
20W
FSDL0365RL
19W
30W
16W
24W
FSDM0365RL
19W
30W
16W
24W
Drain
Source
Vstr
Vfb
Vcc
PWM
AC
IN
DC
OUT
Ipk
FSDL0165RN
Green Mode Fairchild Power Switch (FPS
TM
)
FSDL0165RN
2
Internal Block Diagram
Figure 2. Functional Block Diagram of FSDL0165RN
8V/12V
2
6,7,8
1
3
Vref
Internal
Bias
S
Q
Q
R
OSC
Vcc
Vcc
I
delay
I
FB
V
SD
TSD
Vovp
Vcc
Vocp
S
Q
Q
R
R
2.5R
Vcc good
Vcc
Drain
V
FB
GND
AOCP
Gate
driver
5
Vstr
I
start
Vcc good
V
BURL
/V
BURH
LEB
PWM
Soft start
+
-
4
I
pk
Freq.
Modulation
V
BURH
Vcc
I
B_PEAK
Burst
Normal
FSDL0165RN
3
Pin Definitions
Pin Configuration
Figure 3. Pin Configuration (Top View)
Pin Number
Pin Name
Pin Function Description
1
GND
Sense FET source terminal on primary side and internal control ground.
2
Vcc
Positive supply voltage input. Although connected to an auxiliary transform-
er winding, current is supplied from pin 5 (Vstr) via an internal switch during
startup (see Internal Block Diagram section). It is not until Vcc reaches the
UVLO upper threshold (12V) that the internal start-up switch opens and de-
vice power is supplied via the auxiliary transformer winding.
3
Vfb
The feedback voltage pin is the non-inverting input to the PWM comparator.
It has a 0.9mA current source connected internally while a capacitor and op-
tocoupler are typically connected externally. A feedback voltage of 6V trig-
gers over load protection (OLP). There is a time delay while charging
between 3V and 6V 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.
4
Ipk
Pin to adjust the current limit of the Sense FET. The feedback 0.9mA current
source is diverted to the parallel combination of an internal 2.8k
resistor
and any external resistor to GND on this pin to determine the current limit.
If this pin is tied to Vcc or left floating, the typical current limit will be 1.2A.
5
Vstr
This pin connects directly to the rectified AC line voltage source. At start up
the internal switch supplies internal bias and charges an external storage
capacitor placed between the Vcc pin and ground. Once the Vcc reaches
12V, the internal switch is disabled.
6, 7, 8
Drain
The Drain pin is designed to connect directly to the primary lead of the trans-
former and is capable of switching a maximum of 650V. Minimizing the
length of the trace connecting this pin to the transformer will decrease leak-
age inductance.
1
1
1
1
2
2
2
2
3
3
3
3
4
4
4
4
5
5
5
5
6
6
6
6
7
7
7
7
8
8
8
8
GND
GND
GND
GND
Vcc
Vcc
Vcc
Vcc
Vfb
Vfb
Vfb
Vfb
Ipk
Ipk
Ipk
Ipk
Vstr
Vstr
Vstr
Vstr
Drain
Drain
Drain
Drain
Drain
Drain
Drain
Drain
Drain
Drain
Drain
Drain
8DIP
8DIP
8DIP
8DIP
8LSOP
8LSOP
8LSOP
8LSOP
FSDL0165RN
4
Absolute Maximum Ratings
(Ta=25
C, unless otherwise specified)
Note:
1. Repetitive rating: Pulse width limited by maximum junction temperature
2. L = 51mH, starting Tj = 25
C
3. L = 13
H, starting Tj = 25
C
4. Vsd is shutdown feedback voltage ( see Protection Section in Electrical Characteristics )
Thermal Impedance
Note:
1. Free standing with no heatsink.
2. Measured on the GND pin close to plastic interface.
3. Soldered to 0.36 sq. inch(232mm2), 2 oz.(610g/m2) copper clad.
Characteristic
Symbol
Value
Unit
Drain Current Pulsed
(1)
I
DM
4.0
A
DC
Single Pulsed Avalanche Energy
(2)
E
AS
95
mJ
Maximum Supply Voltage
V
CC,MAX
20
V
Analog Input Voltage Range
V
FB
-0.3 to V
SD
V
Total Power Dissipation
P
D
1.25
W
Operating Junction Temperature.
T
J
+150
C
Operating Ambient Temperature.
T
A
-25 to +85
C
Storage Temperature Range.
T
STG
-55 to +150
C
Parameter
Symbol
Value
Unit
8DIP
Junction-to-Ambient Thermal
JA
(1)
81.50
C/W
(3)
Junction-to-Case Thermal
JC
(2)
21.90
C/W
FSDL0165RN
5
Electrical Characteristics
(Ta = 25
C unless otherwise specified)
Parameter Symbol
Condition
Min.
Typ.
Max.
Unit
Sense FET SECTION
Startup Voltage (Vstr) Breakdown
BV
STR
V
CC
=0V, I
D
=1mA
650
-
-
V
Drain-Source Breakdown Voltage
BV
DSS
V
GS
=0V, I
D
=50
A 650
-
-
V
Off-State Current
(Max.Rating =660V)
I
DSS
V
DS
=660V, V
GS
=0V -
-
50
A
V
DS
=0.8Max.Rating
V
GS
=0V, T
C
=125
C
-
-
200
A
On-State Resistance
(1)
R
DS(ON)
V
GS
=10V, I
D
=0.5A -
8.0
10.0
Input Capacitance
C
ISS
V
GS
=0V, V
DS
=25V,
F=1MHz
-
250
-
pF
Output Capacitance
C
OSS
-
25
-
pF
Reverse Transfer Capacitance
C
RSS
-
10
-
pF
Turn On Delay Time
T
D(ON)
V
DS
=325V, I
D
=1.0A
(Sense FET switching
time is essentially
independent of
operating temperature)
-
12
-
ns
Rise Time
T
R
-
4
-
ns
Turn Off Delay Time
T
D(OFF)
-
30
-
ns
Fall Time
T
F
-
10
-
ns
CONTROL SECTION
Output Frequency
F
OSC
FSDL0165R
45
50
55 KHz
Output Frequency Modulation
F
MOD
1.0
.1.5
2.0
KHz
Frequency Change With Temperature
(2)
-
-25
C
Ta
85
C
-
5 10 %
Maximum Duty Cycle
D
MAX
FSDL0165R
71 77 83 %
Minimum Duty Cycle
D
MIN
0
0
0
%
Start threshold voltage
V
START
V
FB
=GND 11
12
13
V
Stop threshold voltage
V
STOP
V
FB
=GND 7
8
9
V
Feedback Source Current
I
FB
V
FB
=GND 0.7
0.9
1.1
mA
Internal Soft Start Time
T
S/S
V
FB
=4V 10
15
20
ms
BURST MODE SECTION
Burst Mode Voltages
V
BURH
-
0.5 0.6 0.7 V
V
BURL
-
0.25 0.35 0.45 V
PROTECTION SECTION
Drain to Source Peak Current Limit
I
OVER
Max. inductor current
1.06
1.20
1.35
A
Current Limit Delay
(3)
T
CLD
-
500
-
ns
Thermal Shutdown
T
SD
-
125
140 -
C
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