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參數(shù)資料
| 型號： | TOP210PFI |
| 廠商： | POWER INTEGRATIONS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | CONNECTOR ACCESSORY |
| 中文描述： | 0.1 A SWITCHING REGULATOR, 110 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | PLASTIC, MS-001AB, DIP-8 |
| 文件頁數(shù)： | 5/16頁 |
| 文件大?。?/td> | 446K |
| 代理商： | TOP210PFI |
A
8/97
TOP209/210
5
PI-1742-011796
VIN
VOUT
0
IOUT
0
1
2
1
DRAIN
0
VIN
VC
0
1
2
1
2
8
1
0
IC
1
2
8
8
1
2
8
1
Shutdown/Auto-restart
To minimize
TOPSwitch
power dissipation, the shutdown/
auto-restart circuit turns the power supply on and off at a duty
cycle of typically 5% if an out of regulation condition persists.
Loss of regulation interrupts the external current into the
CONTROL pin. V
regulation changes from shunt mode to the
hysteretic auto-restart mode described above. When the fault
condition is removed, the power supply output becomes
regulated, V
regulation returns to shunt mode, and normal
operation of the power supply resumes.
Hysteretic Overtemperature Protection
Temperature protection is provided by a precision analog
circuit that turns the output MOSFET off when the junction
temperature exceeds the thermal shutdown temperature
(typically 145
°
C). When the junction temperature cools past
the hysteresis temperature, normal operation resumes. V
is
regulated in hysteretic mode while the power supply is turned
off.
High-voltage Bias Current Source
This current source biases
TOPSwitch
from the DRAIN pin and
charges the CONTROL pin external capacitance (C
) during
start-up or hysteretic operation. The current source is switched
on and off with an effective duty cycle of approximately 35%.
This duty cycle is determined by the ratio of CONTROL pin
charge (I
) and discharge currents (I
and I
). This current
source is turned off during normal operation when the output
MOSFET is switching.
Figure 6. Typical Waveforms for (1) Normal Operation, (2) Auto-restart.
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