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Off-line Switcher. TOP245 Datasheet

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Off-line Switcher. TOP245 Datasheet
















TOP245 Switcher. Datasheet pdf. Equivalent













Part

TOP245

Description

Integrated Off-line Switcher



Feature


TOP242-250 TOPSwitch®-GX Family Extende d Power, Design Flexible, EcoSmart,® I ntegrated Off-line Switcher Product Hi ghlights Lower System Cost, High Design Flexibility • Extended power range f or higher power applications • No hea tsink required up to 34 W using P/G pac kages • Features eliminate or reduce cost of external components • Fully i ntegrated soft-start for min.
Manufacture

Power Integrations

Datasheet
Download TOP245 Datasheet


Power Integrations TOP245

TOP245; imum stress/overshoot • Externally pro grammable accurate current limit • Wi der duty cycle for more power, smaller input capacitor • Separate line sense and current limit pins on Y/R/F packag es • Line under-voltage (UV) detectio n: no turn off glitches • Line overvo ltage (OV) shutdown extends line surge limit • Line feed-forward with maximu m duty cycle (DCMAX) reduction.


Power Integrations TOP245

rejects line ripple and limits DCMAX at high line • Frequency jittering redu ces EMI and EMI filtering costs • Re gulates to zero load without dummy load ing • 132 kHz frequency reduces trans former/power supply size • Half frequ ency option in Y/R/F packages for video applications • Hysteretic thermal sh utdown for automatic fault recovery • Large thermal hysteresis preven.


Power Integrations TOP245

ts PC board overheating EcoSmart – Ene rgy Efficient • Extremely low consum ption in remote off mode (80 mW at 110 VAC, 160 mW at 230 VAC) • Frequency l owered with load for high standby effi ciency • Allows shutdown/wake-up via LAN/input port Description TOPSwitch-GX uses the same proven topology as TOPSw itch, cost effectively integrating the high voltage power MOSFET, PWM.





Part

TOP245

Description

Integrated Off-line Switcher



Feature


TOP242-250 TOPSwitch®-GX Family Extende d Power, Design Flexible, EcoSmart,® I ntegrated Off-line Switcher Product Hi ghlights Lower System Cost, High Design Flexibility • Extended power range f or higher power applications • No hea tsink required up to 34 W using P/G pac kages • Features eliminate or reduce cost of external components • Fully i ntegrated soft-start for min.
Manufacture

Power Integrations

Datasheet
Download TOP245 Datasheet




 TOP245
TOP242-250
TOPSwitch®-GX Family
Extended Power, Design Flexible,
EcoSmart,® Integrated Off-line Switcher
Product Highlights
Lower System Cost, High Design Flexibility
• Extended power range for higher power applications
• No heatsink required up to 34 W using P/G packages
• Features eliminate or reduce cost of external components
• Fully integrated soft-start for minimum stress/overshoot
• Externally programmable accurate current limit
• Wider duty cycle for more power, smaller input capacitor
• Separate line sense and current limit pins on Y/R/F packages
• Line under-voltage (UV) detection: no turn off glitches
• Line overvoltage (OV) shutdown extends line surge limit
• Line feed-forward with maximum duty cycle (DCMAX)
reduction rejects line ripple and limits DCMAX at high line
• Frequency jittering reduces EMI and EMI filtering costs
• Regulates to zero load without dummy loading
• 132 kHz frequency reduces transformer/power supply size
• Half frequency option in Y/R/F packages for video applications
• Hysteretic thermal shutdown for automatic fault recovery
• Large thermal hysteresis prevents PC board overheating
EcoSmart Energy Efficient
• Extremely low consumption in remote off mode
(80 mW at 110 VAC, 160 mW at 230 VAC)
• Frequency lowered with load for high standby efficiency
• Allows shutdown/wake-up via LAN/input port
Description
TOPSwitch-GX uses the same proven topology as TOPSwitch,
cost effectively integrating the high voltage power MOSFET,
PWM control, fault protection and other control circuitry onto
a single CMOS chip. Many new functions are integrated to
reduce system cost and improve design flexibility, performance
and energy efficiency.
Depending on package type, either 1 or 3 additional pins over
the TOPSwitch standard DRAIN, SOURCE and CONTROL
terminals allow the following functions: line sensing (OV/UV,
line feed-forward/DCMAX reduction), accurate externally set
current limit, remote ON/OFF, synchronization to an external
lower frequency, and frequency selection (132 kHz/66 kHz).
All package types provide the following transparent features:
Soft-start, 132 kHz switching frequency (automatically reduced
at light load), frequency jittering for lower EMI, wider DCMAX,
hysteretic thermal shutdown, and larger creepage packages. In
addition, all critical parameters (i.e. current limit, frequency,
PWM gain) have tighter temperature and absolute tolerances
to simplify design and optimize system cost.
+
AC
DC
IN
OUT
-
D
L
TOPSwitch-GX
CONTROL
C
S
XF
Figure 1. Typical Flyback Application.
PI-2632-060200
OUTPUT POWER TABLE
230 VAC ±15%4 85-265 VAC
PRODUCT3
Adapter1
Open
Frame2
Adapter1
Open
Frame2
TOP242 P or G
TOP242 R
TOP242 Y or F
TOP243 P or G
TOP243 R
TOP243 Y or F
TOP244 P or G
TOP244 R
TOP244 Y or F
TOP245 P or G
TOP245 R
TOP245 Y or F
TOP246 P or G
TOP246 R
TOP246 Y or F
TOP247 R
TOP247 Y or F
TOP248 R
TOP248 Y or F
TOP249 R
TOP249 Y or F
TOP250 R
TOP250 Y or F
9W
15 W
10 W
13 W
29 W
20 W
16 W
34 W
30 W
19 W
37 W
40 W
21 W
40 W
60 W
42 W
85 W
43 W
105 W
44 W
120 W
45 W
135 W
15 W
22 W
22 W
25 W
45 W
45 W
28 W
50 W
65 W
30 W
57 W
85 W
34 W
64 W
125 W
70 W
165 W
75 W
205 W
79 W
250 W
82 W
290 W
6.5 W
11 W
7W
9W
17 W
15 W
11 W
20 W
20 W
13 W
23 W
26 W
15 W
26 W
40 W
28 W
55 W
30 W
70 W
31 W
80 W
32 W
90 W
10 W
14 W
14 W
15 W
23 W
30 W
20 W
28 W
45 W
22 W
33 W
60 W
26 W
38 W
90 W
43 W
125 W
48 W
155 W
53 W
180 W
55 W
210 W
Table 1. Notes: 1. Typical continuous power in a non-ventilated enclosed
adapter measured at 50 °C ambient. 2. Maximum practical continuous
power in an open frame design at 50 °C ambient. See Key Applications
for detailed conditions. 3. For lead-free package options, see Part
Ordering Information. 4. 230 VAC or 100/115 VAC with doubler.
November 2005




 TOP245
TOP242-250
Section List
Functional Block Diagram ....................................................................................................................................... 3
Pin Functional Description ...................................................................................................................................... 4
TOPSwitch-GX Family Functional Description ....................................................................................................... 5
CONTROL (C) Pin Operation.................................................................................................................................. 6
Oscillator and Switching Frequency........................................................................................................................ 6
Pulse Width Modulator and Maximum Duty Cycle.................................................................................................. 7
Light Load Frequency Reduction ............................................................................................................................ 7
Error Amplifier ......................................................................................................................................................... 7
On-Chip Current Limit with External Programmability ............................................................................................ 7
Line Under-Voltage Detection (UV)......................................................................................................................... 8
Line Overvoltage Shutdown (OV) ........................................................................................................................... 8
Line Feed-Forward with DCMAX Reduction .............................................................................................................. 8
Remote ON/OFF and Synchronization ................................................................................................................... 9
Soft-Start................................................................................................................................................................. 9
Shutdown/Auto-Restart........................................................................................................................................... 9
Hysteretic Over-Temperature Protection................................................................................................................. 9
Bandgap Reference .............................................................................................................................................. 10
High-Voltage Bias Current Source ........................................................................................................................ 10
Using Feature Pins ................................................................................................................................................... 10
FREQUENCY (F) Pin Operation ........................................................................................................................... 10
LINE-SENSE (L) Pin Operation ............................................................................................................................ 10
EXTERNAL CURRENT LIMIT (X) Pin Operation.................................................................................................. 11
MULTI-FUNCTION (M) Pin Operation .................................................................................................................. 11
Typical Uses of FREQUENCY (F) Pin ...................................................................................................................... 14
Typical Uses of LINE-SENSE (L) and EXTERNAL CURRENT LIMIT (X) Pins ...................................................... 15
Typical Uses of MULTI-FUNCTION (M) Pin ........................................................................................................... 17
Application Examples .............................................................................................................................................. 20
A High Efficiency, 30 W, Universal Input Power Supply ........................................................................................ 20
A High Efficiency, Enclosed, 70 W, Universal Adapter Supply.............................................................................. 20
A High Efficiency, 250 W, 250-380 VDC Input Power Supply ............................................................................... 22
Multiple Output, 60 W, 185-265 VAC Input Power Supply .................................................................................... 23
Processor Controlled Supply Turn On/Off............................................................................................................. 24
Key Application Considerations ............................................................................................................................. 26
TOPSwitch-II vs. TOPSwitch-GX .......................................................................................................................... 26
TOPSwitch-FX vs. TOPSwitch-GX ....................................................................................................................... 28
TOPSwitch-GX Design Considerations ............................................................................................................... 28
TOPSwitch-GX Layout Considerations ................................................................................................................. 30
Quick Design Checklist ......................................................................................................................................... 32
Design Tools ......................................................................................................................................................... 32
Product Specifications and Test Conditions ......................................................................................................... 33
Typical Performance Characteristics .................................................................................................................... 40
Part Ordering Information ....................................................................................................................................... 46
Package Outlines ..................................................................................................................................................... 47
2
O
11/05




 TOP245
CONTROL (C)
EXTERNAL
CURRENT LIMIT (X)
LINE-SENSE (L)
FREQUENCY (F)
VC
ZC
SHUNT REGULATOR/
ERROR AMPLIFIER
5.8 V
IFB
VI (LIMIT)
CURRENT
LIMIT
SOFT
ADJUST START
ON/OFF
VBG + VT
+
5.8 V
4.8 V
-
INTERNAL UV
COMPARATOR
SOFT START
0
INTERNAL
1
SUPPLY
÷8
SHUTDOWN/
AUTO-RESTART
1V
VBG
OV/UV
LINE
SENSE DCMAX
STOP LOGIC
STOP SOFT-
START
DCMAX
DMAX
CLOCK
HYSTERETIC
THERMAL
SHUTDOWN
HALF
FREQ.
SAW
OSCILLATOR WITH JITTER
-
+
PWM
COMPARATOR
LIGHT LOAD
RE
FREQUENCY
REDUCTION
S
Q
R
Figure 2a. Functional Block Diagram (Y, R or F Package).
CONTROL (C)
MULTI-
FUNCTION (M)
VC
ZC
0
INTERNAL
1
SUPPLY
SHUNT REGULATOR/
ERROR AMPLIFIER
5.8 V
IFB
VI (LIMIT)
CURRENT
LIMIT
ADJUST
SOFT
START
ON/OFF
VBG + VT
+
5.8 V
4.8 V
-
INTERNAL UV
COMPARATOR
SOFT START
÷8
SHUTDOWN/
AUTO-RESTART
STOP LOGIC
VBG
OV/UV
LINE
SENSE DCMAX
STOP SOFT-
START
DCMAX
DMAX
CLOCK
HYSTERETIC
THERMAL
SHUTDOWN
SAW
-
OSCILLATOR WITH JITTER
+
PWM
COMPARATOR
LIGHT LOAD
RE
FREQUENCY
REDUCTION
S
Q
R
Figure 2b. Functional Block Diagram (P or G Package).
TOP242-250
DRAIN (D)
CURRENT LIMIT
COMPARATOR
CONTROLLED
TURN-ON
GATE DRIVER
LEADING
EDGE
BLANKING
SOURCE (S)
PI-2639-060600
DRAIN (D)
CURRENT LIMIT
COMPARATOR
CONTROLLED
TURN-ON
GATE DRIVER
LEADING
EDGE
BLANKING
SOURCE (S)
PI-2641-061200
O
11/05
3




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