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What is TOP256?

This electronic component, produced by the manufacturer "Power Integrations", performs the same function as "(TOP252 - TOP261) Integrated Off Line Switcher".


TOP256 Datasheet PDF - Power Integrations

Part Number TOP256
Description (TOP252 - TOP261) Integrated Off Line Switcher
Manufacturers Power Integrations 
Logo Power Integrations Logo 


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TOP252-261
TOPSwitch-® HX Family
Enhanced EcoSmart®, Integrated Off-Line Switcher with
Advanced Feature Set and Extended Power Range
Product Highlights
Lower System Cost, Higher Design Flexibility
Multi-mode operation maximizes efficiency at all loads
New eSIP-7C package builds on PI’s experience with high
power and high reliability packages
Low thermal impedance junction-to-case (2 °C per watt)
Low height is ideal for adapters where space is limited
Simple mounting using a clip to aid low cost manufacturing
No heatsink required up to 35 W using P, G and M packages
with universal input voltage and up to 48 W at 230 VAC
Output overvoltage protection (OVP) is user programmable for
latching/non-latching shutdown with fast AC reset
Allows both primary and secondary sensing
Line undervoltage (UV) detection prevents turn-off glitches
Line overvoltage (OV) shutdown extends line surge limit
Accurate programmable current limit
Optimized line feed-forward for line ripple rejection
132 kHz frequency (254Y-258Y and all E packages) reduces
transformer and power supply size
Half frequency option for video applications
Frequency jittering reduces EMI filter cost
Heatsink is connected to SOURCE for low EMI
Improved auto-restart delivers <3% of maximum power in short
circuit and open loop fault conditions
Accurate hysteretic thermal shutdown function automatically
recovers without requiring a reset
Fully integrated soft-start for minimum start-up stress
Extended creepage between DRAIN and all other pins improves
field reliability
+
AC DC
IN OUT
-
D
TOPSwitch-HX
V
CONTROL
C
S XF
PI-4510-100206
Figure 1. Typical Flyback Application.
EcoSmart®– Energy Efficient
Energy efficient over entire load range
No-load consumption
Less than 200 mW at 265 VAC for TOP256-258
Less than 300 mW at 265 VAC for TOP259-261
Standby power for 1 W input
>600 mW output at 110 VAC input
>500 mW output at 265 VAC input
Description
TOPSwitch-HX cost effectively incorporates a 700 V power
MOSFET, high voltage switched current source, PWM control,
oscillator, thermal shutdown circuit, fault protection and other
control circuitry onto a monolithic device.
Output Power Table
Product5
230 VAC ±15%4
Adapter1
Open
Frame2
Peak3
TOP252PN/GN
TOP252MN
9W
15 W
21 W
21 W
TOP253PN/GN
TOP253MN
15 W
25 W
38 W
43 W
85-265 VAC
Adapter1
Open
Frame2
6.5 W
10 W
9 W 15 W
Peak3
13 W
13 W
25 W
29 W
Product5
TOP252EN
230 VAC ±15%
Adapter1
Open
Frame2
10 W
21 W
85-265 VAC
Adapter1
Open
Frame2
6 W 13 W
TOP253EN
21 W
43 W
13 W
29 W
TOP254EN/YN 30 W
62 W
20 W
43 W
TOP254PN/GN
TOP254MN
TOP255PN/GN
TOP255MN
16 W
19 W
28 W
30 W
47 W
62 W
54 W
81 W
11 W
13 W
20 W
22 W
30 W
40 W
35 W
52 W
TOP255EN/YN
TOP256EN/YN
TOP257EN/YN
40 W
60 W
85 W
81 W
119 W
157 W
26 W
40 W
55 W
57 W
86 W
119 W
TOP256PN/GN
TOP256MN
TOP257PN/GN
TOP257MN
TOP258PN/GN
TOP258MN
21 W
25 W
29 W
34 W
41 W
48 W
63 W
98 W
70 W
119 W
77 W
140 W
15 W
19 W
22 W
26 W
30 W
35 W
40 W
64 W
45 W
78 W
50 W
92 W
TOP258EN/YN
TOP259EN/YN
TOP260EN/YN
TOP261EN/YN
105 W
128 W
147 W
177 W
195 W
238 W
275 W
333 W
70 W
80 W
93 W
118 W
148 W
171 W
200 W
254 W
Table 1. Output Power Table. (for notes see page 2).
www.powerint.com
February 2008

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TOP256 equivalent
www.DataSheet4U.com
TOP252-261
CONTROL (C)
EXTERNAL
CURRENT
LIMIT (X)
VOLTAGE
MONITOR (V)
FREQUENCY
(F)
VC
ZC
SHUNT REGULATOR/
ERROR AMPLIFIER
-
+ 5.8 V
IFB
VI (LIMIT)
CURRENT
LIMIT
ADJUST
ON/OFF
5.8 V
4.8 V
+
-
INTERNAL UV
COMPARATOR
VBG + VT
1V
STOP LOGIC
SOFT START
0
INTERNAL
1 SUPPLY
÷ 16
SHUTDOWN/
AUTO-RESTART
HYSTERETIC
THERMAL
SHUTDOWN
V OVP OV/
UV
LINE
SENSE DCMAX
STOP SOFT
START
DCMAX
OSCILLATOR
WITH JITTER
66k/132k
F REDUCTION
DMAX
CLOCK
KPS(UPPER)
KPS(LOWER)
F REDUCTION
SOFT START
IFB
IPS(UPPER)
IPS(LOWER)
PWM
OFF
SQ
R
Figure 3c. Functional Block Diagram (TOP254-258 Y Package and eSIP Package).
CONTROL (C)
EXTERNAL
CURRENT
LIMIT (X)
VOLTAGE
MONITOR (V)
VC
ZC
SHUNT REGULATOR/
ERROR AMPLIFIER
-
+ 5.8 V
IFB
VI (LIMIT)
CURRENT
LIMIT
ADJUST
ON/OFF
5.8 V
4.8 V
+
-
INTERNAL UV
COMPARATOR
VBG + VT
1V
STOP LOGIC
SOFT START
0
INTERNAL
1 SUPPLY
÷ 16
SHUTDOWN/
AUTO-RESTART
HYSTERETIC
THERMAL
SHUTDOWN
V OVP OV/
UV
LINE
SENSE DCMAX
DCMAX
STOP SOFT
START
OSCILLATOR
WITH JITTER
DMAX
CLOCK
F REDUCTION
KPS(UPPER)
KPS(LOWER)
F REDUCTION
SOFT START
IFB
IPS(UPPER)
IPS(LOWER)
PWM
OFF
SQ
R
Figure 3d. Functional Block Diagram TOP259YN, TOP260YN, TOP261YN.
-
+
KPS(UPPER)
-
+
KPS(LOWER)
-
+
CURRENT LIMIT
COMPARATOR
SOURCE (S)
CONTROLLED
TURN-ON
GATE DRIVER
LEADING
EDGE
BLANKING
PI-4511-082907
-
+
KPS(UPPER)
-
+
KPS(LOWER)
-
+
CURRENT LIMIT
COMPARATOR
SOURCE (S)
CONTROLLED
TURN-ON
GATE DRIVER
LEADING
EDGE
BLANKING
PI-4974-122607
DRAIN (D)
SOURCE (S)
DRAIN (D)
SOURCE (S)
SIGNAL
GROUND (G)
www.powerint.com
5
Rev. B 02/08


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On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for TOP256 electronic component.


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TOP256 datasheet


1. AC-DC Power Conversion - TOPSwitch

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