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參數資料
| 型號： | TPS54310PWPRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 6 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封裝： | GREEN, PLASTIC, HTSSOP-20 |
| 文件頁數： | 6/19頁 |
| 文件大小： | 463K |
| 代理商： | TPS54310PWPRG4 |
www.ti.com
Thermal Shutdown
Power Good (PWRGD)
SLVS412D – DECEMBER 2001 – REVISED FEBRUARY 2007
The device uses the thermal shutdown to turn off the
The power good circuit monitors for under voltage
power MOSFETs and disable the controller if the
conditions on VSENSE. If the voltage on VSENSE is
junction temperature exceeds 150
°C. The device is
10% below the reference voltage, the open-drain
released
from
shutdown
when
the
junction
PWRGD output is pulled low. PWRGD is also pulled
temperature decreases to 10
°C below the thermal
low if VIN is less than the UVLO threshold, or
shutdown trip point and starts up under control of the
SS/ENA is low, or thermal shutdown is asserted.
slow-start
circuit.
Thermal
shutdown
provides
When VIN = UVLO threshold, SS/ENA = enable
protection when an overload condition is sustained
threshold, and VSENSE > 90% of Vref, the open
for several milliseconds. With a persistent fault
drain output of the PWRGD pin is high. A hysteresis
condition, the device cycles continuously; starting up
voltage equal to 3% of Vref and a 35-s falling edge
by control of the soft-start circuit, heating up due to
deglitch circuit prevent tripping of the power good
the fault, and then shutting down upon reaching the
comparator due to high frequency noise.
thermal shutdown point.
14
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