參數(shù)資料
型號: TOP232-234
廠商: Power Integrations, Inc.
英文描述: Family Design Flexible,EcoSmart, Intergrated OFff-line Switcher
中文描述: 家庭設(shè)計靈活,EcoSmart節(jié)能,綜合OFff線切換
文件頁數(shù): 30/36頁
文件大?。?/td> 650K
代理商: TOP232-234
TOP232-234
30
B
7/01
The following precautions should be followed when testing
TOPSwitch-FX
by itself outside of a power supply. The schematic
shown in Figure 34 is suggested for laboratory testing of
TOPSwitch-FX
.
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-FX,
which then will come up in the
correct state.
.3
-250
.4
.5
.6
.7
.8
.9
1.0
-200
-150
-100
-50
0
I
M
(
μ
A)
C
CURRENT LIMIT vs. MULTI-FUNCTION
PIN CURRENT
PI-2540-033001
60
80
100
120
140
160
180
200
d
μ
s
TOP234 1.50
TOP233 1.00
TOP232 0.50
Scaling Factors:
.3
.4
.5
.6
.7
.8
.9
1.0
1.1
60
80
100
120
140
160
180
200
0
5K
10K
15K
20K
25K
External Current Limit Resistor R
IL
(
)
C
d
μ
s
CURRENT LIMIT vs. EXTERNAL
CURRENT LIMIT RESISTANCE
PI-2539-033001
30K
Maximum and minimum levels
are based on characterization.
Maximum
Minimum
Typical
TOP234 1.50
TOP233 1.00
TOP232 0.50
Scaling Factors:
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