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参数资料
| 型号： | TOP242G-TL |
| 厂商： | POWER INTEGRATIONS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 0.72 A SWITCHING REGULATOR, 140 kHz SWITCHING FREQ-MAX, PDSO7 |
| 封装： | PLASTIC, SMD-8/7 |
| 文件页数： | 32/52页 |
| 文件大小： | 2175K |
| 代理商： | TOP242G-TL |
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TOP242-250
N
4/05
38
NOTES:
A. For specications with negative values, a negative temperature coefcient corresponds to an increase in
magnitude with increasing temperature, and a positive temperature coefcient corresponds to a decrease in
magnitude with increasing temperature.
B. Guaranteed by characterization. Not tested in production.
C. For externally adjusted current limit values, please refer to Figures 54b, 55b and 56b (Current Limit vs. External
Current Limit Resistance) in the Typical Performance Characteristics section. The tolerance specied is only valid
at full current limit.
D. Breakdown voltage may be checked against minimum BV
DSS specication by ramping the DRAIN pin voltage up
to but not exceeding minimum BV
DSS.
E. It is possible to start up and operate
TOPSwitch-GX at DRAIN voltages well below 36 V. However, the CONTROL
pin charging current is reduced, which affects start-up time, auto-restart frequency, and auto-restart duty cycle.
Refer to Figure 68, the characteristic graph on CONTROL pin charge current (I
C) vs. DRAIN voltage for low
voltage operation characteristics.
Parameter
Symbol
Conditions
SOURCE = 0 V; T
J = -40 to 125 °C
See Figure 53
(Unless Otherwise Specied)
Min
Typ
Max
Units
OUTPUT (cont.)
ON-State
Resistance
R
DS(ON)
TOP249
I
D = 600 mA
T
J = 25 °C
1.30
1.50
T
J = 100 °C
2.15
2.50
TOP250
I
D = 700 mA
T
J = 25 °C
1.10
1.28
T
J = 100 °C
1.85
2.15
OFF-State Drain
Leakage Current
I
DSS
V
L, VM = Floating; IC = 4 mA
V
DS = 560 V; TJ = 125 °C
470
A
Breakdown
Voltage
BV
DSS
V
L, VM = Floating; IC = 4 mA
See Note D, T
J = 25 °C
700
V
Rise Time
t
R
Measured in a Typical Flyback
Converter Application
100
ns
Fall Time
t
F
50
ns
SUPPLY VOLTAGE CHARACTERISTICS
DRAIN Supply
Voltage
See Note E
36
V
Shunt Regulator
Voltage
V
C(SHUNT)
I
C = 4 mA
5.60
5.85
6.10
V
Shunt Regulator
Temperature Drift
±50
ppm/°C
Control Supply/
Discharge Current
I
CD1
Output MOSFET
Enabled
V
X, VL, VM = 0 V
TOP242-245
1.0
1.6
2.5
mA
TOP246-249
1.2
2.2
3.2
TOP250
1.3
2.4
3.65
I
CD2
Output MOSFET
Disabled
V
X, VL, VM = 0 V
0.3
0.6
1.3
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