TOP242-250 POWERINT [Power Integrations, Inc.], TOP242-250 Datasheet - Page 40

• Manufacturer Part Number: TOP242-250
• Description: TOPSwitch-GX Family Extended Power, Design Flexible, EcoSmart, Integrated Off-line Switcher
• Manufacturer: POWERINT [Power Integrations, Inc.]

Typical Performance Characteristics
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 V and 5.8 V and
the drain is turned on every eigth cycle of the CONTROL pin
oscillation. If the CONTROL pin power supply is turned on
40
BENCH TEST PRECAUTIONS FOR EVALUATION OF ELECTRICAL CHARACTERISTICS
TOP242-250
M
12/04
Figure 54a. Current Limit vs. X or M Pin Current (see Figures 55a and 56a for TOP245P and TOP246P).
Figure 54b. Current Limit vs. External Current Limit Resistance (see Figures 55b and 56b for TOP245P and
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
-250
0
Maximum and minimum levels
are based on characterization.
TOP246P).
Minimum
5K
-200
Typical
10K
External Current Limit Resistor R
15K
Maximum
-150
20K
I
X
or I
M
(µA)
while in this auto-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
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.
25K
-100
30K
IL
(Ω)
35K
Scaling Factors:
TOP242 P/G/Y/R/F: .45
TOP243 P/G:
TOP243 Y/R/F:
TOP244 P/G:
TOP244 Y/R/F:
TOP245 Y/R/F:
TOP246 Y/R/F:
TOP247 Y/R/F:
TOP248 Y/R/F
TOP249 Y/R/F:
TOP250 Y/R/F:
Scaling Factors:
TOP242 P/G/Y/R/F: .45
TOP243 P/G:
TOP243 Y/R/F:
TOP244 P/G:
TOP244 Y/R/F:
TOP245 Y/R/F:
TOP246 Y/R/F:
TOP247 Y/R/F:
TOP248 Y/R/F
TOP249 Y/R/F:
TOP250 Y/R/F:
-50
40K
PI-2653-031904
PI-2652-042303
1.35
1.80
2.70
3.60
4.50
5.40
6.32
1.35
1.80
2.70
3.60
4.50
5.40
6.32
.75
.90
.75
.90
1
1
45K
0
200
180
160
140
120
100
80
60
40
200
180
160
140
120
100
80
60
40
C
power supply