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參數(shù)資料
| 型號： | TOPP244R |
| 廠商： | Power Integrations, Inc. |
| 英文描述： | Family Extended Power, Design Flexible,Integrated Off-line Switcher |
| 中文描述： | 家庭擴展的電源，設計靈活，集成的離線切換 |
| 文件頁數(shù)： | 41/48頁 |
| 文件大小： | 771K |
| 代理商： | TOPP244R |
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TOP242-249
41
August 8, 2000
E
7/01
The following precautions should be followed when testing
TOPSwitch-GX
by itself outside of a power supply. The
schematic shown in Figure 53 is suggested for laboratory
testing of
TOPSwitch-GX
.
When the DRAIN pin supply is turned on, the part will be in the
auto-restart mode. The CONTROL pin voltage will be oscillating
at a low frequency between 4.8 and 5.8 V and the drain is turned
on every eighth cycle of the CONTROL pin oscillation. If the
CONTROL pin power supply is turned on while in this auto-
BENCH TEST PRECAUTIONS FOR EVALUATION OF ELECTRICAL CHARACTERISTICS
Typical Performance Characteristics
restart mode, there is only a 12.5% chance that the CONTROL
pin oscillation will be in the correct state (drain active state) so
that the continuous drain voltage waveform may be observed.
It is recommended that the V
power supply be turned on first
and the DRAIN pin power supply second if continuous drain
voltage waveforms are to be observed. The 12.5% chance of
being in the correct state is due to the divide-by-8 counter.
Temporarily shorting the CONTROL pin to the SOURCE pin
will reset
TOPSwitch-GX,
which then will come up in the
correct state.
Figure 54. Current Limit vs. MULTI-FUNCTION Pin Current.
Figure 55. Current Limit vs. External Current Limit Resistance.
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
60
40
0
80
100
120
140
160
180
200
-250
-200
-150
-100
-50
I
M
(
μ
A)
C
d
μ
s
PI-2653-033001
Scaling Factors:
TOP242: .45
TOP243 P/G: .75
TOP243 Y/R: .90
TOP244 P/G: 1
TOP244 Y/R: 1.35
TOP245 Y/R: 1.80
TOP246 Y/R: 2.70
TOP247 Y/R: 3.60
TOP248 Y/R: 4.50
TOP249 Y/R: 5.40
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
60
40
80
100
120
140
160
180
200
0
5K
10K
15K
20K
25K
30K
35K
40K
External Current Limit Resistor R
IL
(
)
C
d
μ
s
PI-2652-033001
45K
Scaling Factors:
TOP242: .45
TOP243 P/G: .75
TOP243 Y/R: .90
TOP244 P/G: 1
TOP244 Y/R: 1.35
TOP245 Y/R: 1.80
TOP246 Y/R: 2.70
TOP247 Y/R: 3.60
TOP248 Y/R: 4.50
TOP249 Y/R: 5.40
Maximum and minimum levels
are based on characterization.
Minimum
Typical
Maximum
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TOP249R | Family Extended Power, Design Flexible,Integrated Off-line Switcher |
| TOP249Y | Family Extended Power, Design Flexible,Integrated Off-line Switcher |
| TOP242-249 | Family Extended Power, Design Flexible,Integrated Off-line Switcher |
| TOP242G | Family Extended Power, Design Flexible,Integrated Off-line Switcher |
| TOP242P | Family Extended Power, Design Flexible,Integrated Off-line Switcher |
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