FAIRCHILD FSDH0165

www.fairchildsemi.com
FSDH0165
Fairchild Power Switch(FPS)
Features
Description
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The FSDH0165 is specially designed for an off-line SMPS with
minimal external components. The FSDH0165 is a monolithic
high voltage power switching regulator that combine the
SenseFET(LDMOS) with voltage mode PWM control block.
Included PWM controller features integrated fixed oscillator,
under voltage lock out, leading edge blanking, optimized gate
turn-on/turn-off driver, thermal shut down protection and
temperature compensated precision current sources for loop
compensation and fault protection circuitry. compared to
discrete MOSFET and controller or RCC switching converter
solution, a FSDH0165 can reduce total component count,
design size, weight and at the same time increase efficiency,
productivity, and system reliability. It has a basic platform well
suited for cost effective design in a flyback converter.
Single Chip 650V 1A SenseFET PowerSwitch
Precision Fixed Operating Frequency (100kHz)
Internal Start-up Switch
UVLO with Hysterisis (6.7V/8.7V)
Over Load Protection (typ. 4.5V)
Over Current Protection (typ. 0.6A)
Internal Thermal Shutdown Function
Secondary Side Regulation
Auto-restart mode
No load consumption <250mW at 265VAC input
Applications
• Charger & Adaptor for Mobile Phone, PDA & MP3
• Auxiliary Power for PC
8-DIPH
1
1.Vstr 2.Vfb 3.4.5.6.GND 7.Vcc 8.Drain
Internal Block Diagram
#1 : Vstr
UVLO ≤ 6.7V
#7 : Vcc
UVLO
VREG(5.8V)
UVLO ≥ 8.7V
4.5V
VREF
#8 : Drain
INTERNAL
BIAS
SFET
OSC
S
5.8V
Q
PWM
5 uA
0.45 mA
R
+
L.E.B
_
#2 : Vfb
+
OCP
_
OLP
+
Vth
_
S
4.5V
Q
R
TSD
#3,#4,#5,#6
GND
÷4
Rev.1.0.4
©2001 Fairchild Semiconductor Corporation
FSDH0165
Absolute Maximum Ratings
(Ta=25°C unless otherwise specified)
Parameter
Maximum Drain Voltage
Continuous Drain Current (TC=25°C)
Maximum Supply Voltage
Input Voltage Range
Operating Ambient Temperature
Storage Temperature Range
Symbol
Value
Unit
VD,MAX
650
V
ID
0.6
ADC
VCC,MAX
21
V
VFB
−0.3 to VSD
V
TA
−25 to +85
°C
TSTG
−55 to +150
°C
PIN Definitions
Pin Number
Pin Name
Pin Function Description
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 capacitor
that connects from the Vcc pin to ground. once this reaches 8.7V, Vstr is
isolated internally.
2
Vfb
This pin is the inverting input of the PWM comparator, and it operates
normally between 0.5V and 2.5V. It has a 0.45mA current source
connected internally and a capacitor and opto coupler connected
externally. A feedback voltage of 3.5V to 4.5V triggers overload protection
(OLP). There is a time delay due to the 5uA current source, which prevents
false triggering under transient conditions but still allows the protection
mechanism to operate under true overload conditions.
3,4,5,6
GND
These pins are the control ground and the SenseFET Source.
7
Vcc
This is the positive supply voltage input. During start up, power is supplied
to this input from Pin 1. When Vcc reaches the UVLO upper threshold
(8.7V), the start up Internal Switch (Vstr) turns off and power is supplied
from auxiliary transformer winding.
8
Drain
1
2
This pin is designed to directly drive the converter transformer and is
capable of switching a maximum of 650V and 1A.
FSDH0165
Electrical Characteristics
(Ta=25°C unless otherwise specified)
Parameter
Symbol
Condition
Min.
Typ.
Max.
Unit
650
-
-
V
SENSEFET SECTION
Drain-Source Breakdown Voltage
Zero gate voltage drain current
Static drain-source on Resistance
BVDSS
IDSS
RDS(ON)
VGS = 0V, ID = 100µA
VDS = 520V
-
-
100
µA
ID = 50mA Tj = 25°C
-
15.6
18
Ω
ID = 50mA Tj = 100°C
-
25.7
30
Ω
Rise Time
TR
VDS = 325V, ID = 300mA
-
100
-
nS
Fall Time
TF
VDS = 325V, lD = 50mA
-
50
-
nS
VST
-
17
-
-
V
Start Threshold Voltage
Vstart
-
8.0
8.7
9.4
V
Stop Threshold Voltage
Vstop
After turn on
6.0
6.7
7.4
V
Initial accuracy
FOSC
Tj = 25°C
90
100
110
kHz
Maximum Duty Cycle
Dmax
Vfb = 3V
64
67
70
%
Minimum Duty Cycle
Dmin
Vfb = 0V
-
0
0
%
Feedback Source Current
IFB
Vfb = 0V
0.40
0.45
0.50
mA
Shutdown feedback Voltage
VSD
4.0
4.5
5.0
V
0.5
0.6
0.7
A
125
145
-
°C
-
-
4
mA
START UP SECTION
VSTR Supply Voltage
UVLO SECTION
OSCILLATOR SECTION
FEEDBACK SECTION
-
CURRENT LIMIT(SELF-PROTECTION)SECTION
Peak Current Limit
IOVER
peak inductor current
PROTECTION SECTION
Thermal Shutdown Temperature (Tj) (1)
TSD
-
TOTAL DEVICE SECTION
Operating Supply Current
IOPR
VCC = 21V (Max)
Note:
1.These parameters, although guaranteed, are not 100% tested in production
3
FSDH0165
Typical Performance Characteristics
(These characteristic graphs are normalized at Ta=25°C)
[V]
7.2
Vstop
[V]
8.96
7.1
8.92
7
8.88
6.9
8.84
6.8
8.8
Vstart
8.76
6.7
-25
0
25
50
75
100
125
-25
150 [°C]
Figure 1. Stop Threshold Voltage
0
25
50
75
100
125
150 [°C]
Figure 2. Start Threshold Voltage
[mA]
2.4
Iopr
[A]
0.46
Ifb
2.35
0.44
2.3
2.25
0.42
2.2
0.4
2.15
2.1
0.38
-25
0
25
50
75
100
125
150 [°C]
-25
Figure 3. Operating Supply Current
[kHz]
108
Fosc
50
75
100
125
[A]
0.8
0.7
100
0.6
96
0.5
92
0.4
88
0.3
150 [°C]
Ipeak
0.2
-25
-10
0
25
50
75
100
125
Figure 5. Initial Accuracy
4
25
Figure 4. Feedback Source Current
104
84
0
150[°C]
-25
-10
0
25
50
75
100
125
Figure 6. Peak Current Limit
150 [°C]
FSDH0165
Typical Performance Characteristics (Continued)
(These characteristic graphs are normalized at Ta=25°C)
[mA]
3.00
2.50
Vstop
[mA]
Vstart
2.50
Vstr
2.00
2.00
1.50
1.50
1.00
1.00
0.50
0.50
0.00
0.00
0
2.5
5
7.5
10
12.5
15
17.5
20 [V]
1
13
Figure 7. Stop/Start Threshold Voltage
1000
[pF]
25
37
49
61
73
85
97[V]
Figure 8. VSTR Supply Voltage
Coss
800
[V]
BVdss
760
100
720
680
10
640
1
0
25
50
75
[V]
Figure 9. Coss vs. Drain Voltage
100
600
-50
0
50
100
[°C] 150
Figure 10. Breakdown vs. Temperature
5
FSDH0165
Application Circuit
VDC
Vstart
1
Start-up
8
Drain
PWM
3,4,5&6
BCDMOS 1Chip
2
7
Vfb
6
GND
Vcc
Feedback
Circuit
FSDH0165
Package Dimensions
8-DIPH
7
FSDH0165
Ordering Information
Product Number
Package
Rating
Topr (°°C)
FSDH0165
8-DIPH
650V, 1A
−25°C to +85°C
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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 2001 Fairchild Semiconductor Corporation