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PDF TOP258 Data sheet ( Hoja de datos )
| Número de pieza | TOP258 | |
| Descripción | (TOP252 - TOP261) Integrated Off Line Switcher | |
| Fabricantes | Power Integrations | |
| Logotipo |  |
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www.DataSheet4U.com
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
1 page  
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
5 Page 
www.DataSheet4U.com
TOP252-261
threshold, which, once exceeded, will force TOPSwitch-HX to
stop switching instantaneously (after completion of the current
switching cycle). If this condition lasts for at least 100 μs, the
TOPSwitch-HX output will be forced into off state. Unlike with
TOPSwitch-GX, however, when the line voltage is back to
normal with a small amount of hysteresis provided on the OV
threshold to prevent noise triggering, the state machine sets to
S13 and forces TOPSwitch-HX to go through the entire auto-
restart sequence before attempting to switch again. The ratio
of OV and UV thresholds is preset at 4.5, as can be seen in
Figure 12. When the MOSFET is off, the rectified DC high
voltage surge capability is increased to the voltage rating of the
MOSFET (700 V), due to the absence of the reflected voltage
and leakage spikes on the drain. The OV feature can be
disabled independent of the UV feature.
In order to reduce the no-load input power of TOPSwitch-HX
designs, the V-pin (or M-pin for P Package) operates at very low
currents. This requires careful layout considerations when
designing the PCB to avoid noise coupling. Traces and
components connected to the V-pin should not be adjacent to
any traces carrying switching currents. These include the drain,
clamp network, bias winding return or power traces from other
converters. If the line sensing features are used, then the sense
resistors must be placed within 10 mm of the V-pin to minimize
the V-pin node area. The DC bus should then be routed to the
line sense resistors. Note that external capacitance must not
be connected to the V-pin as this may cause misoperaton of the
V pin related functions.
Hysteretic or Latching Output Overvoltage Protection (OVP)
The detection of the hysteretic or latching output overvoltage
protection (OVP) is through the trigger of the line overvoltage
threshold. The V-pin or M-pin voltage will drop by 0.5 V, and
the controller measures the external attached impedance
immediately after this voltage drops. If I or I exceeds I
VM
OV(LS)
(336 μA typical) longer than 100 μs, TOPSwitch-HX will latch
into a permanent off state for the latching OVP. It only can be
reset if V or V goes below 1 V or V goes below the power-
VM
C
up-reset threshold (V ) and then back to normal.
C(RESET)
If I or I does not exceed I or exceeds no longer than
VM
OV(LS)
100 μs, TOPSwitch-HX will initiate the line overvoltage and the
hysteretic OVP. Their behavior will be identical to the line
overvoltage shutdown (OV) that has been described in detail in
the previous section.
Voltage Monitor and External Current Limit Pin Table*
Figure Number
Three Terminal Operation
Line Undervoltage
Line Overvoltage
Line Feed-Forward (DCMAX)
Output Overvoltage Protection
Overload Power Limiting
External Current Limit
Remote ON/OFF
Device Reset
16 17 18 19 20 21 22 23 24 25 26 27 28
✓
✓✓✓✓
✓✓
✓✓✓
✓
✓✓
✓✓✓
✓✓
✓✓
✓
✓✓
✓✓✓
✓✓✓
✓
*This table is only a partial list of many VOLTAGE MONITOR and EXTERNAL CURRENT LIMIT Pin Configurations that are possible.
Table 2. VOLTAGE MONITOR (V) Pin and EXTERNAL CURRENT LIMIT (X) Pin Configuration Options.
Multi-Function Pin Table*
Figure Number
Three Terminal Operation
Line Undervoltage
Line Overvoltage
Line Feed-Forward (DCMAX)
Output Overvoltage Protection
Overload Power Limiting
External Current Limit
Remote ON/OFF
Device Reset
29 30 31 32 33 34 35 36 37 38 39 40
✓
✓✓✓✓
✓✓✓
✓
✓✓✓
✓✓
✓
✓✓
✓✓
✓✓✓
✓
*This table is only a partial list of many MULTI-FUNCTIONAL Pin Configurations that are possible.
Table 3. MULTI-FUNCTION (M) Pin Configuration Options.
www.powerint.com
11
Rev. B 02/08
11 Page | ||
| Páginas | Total 48 Páginas | |
| PDF Descargar | [ Datasheet TOP258.PDF ] | |
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