參數(shù)資料
型號： TPS3514DG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 電源管理
英文描述： 3-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO14
封裝： GREEN, PLASTIC, SOIC-14
文件頁數(shù)： 1/17頁
文件大?。?/td> 585K
代理商： TPS3514DG4
www.ti.com
FEATURES
DESCRIPTION
PGI
GND
FPO
PSON
IS12
RI
NC
PGO
VDD
VS5
VS33
VS12
IS33
IS5
5V
3.3V
12V
TPS3514
560
56k
R2
R1
470k
1k
820
1.5k
0.01
0.01
0.01
IO
5V VSB
12V
5V
3.3V
5V VSB
PG
From Transformer
System Side
Power Supply
Output Side
SLVS422C – JUNE 2002 – REVISED DECEMBER 2006
PC POWER-SUPPLY SUPERVISORS
Over-Voltage Protection and
The TPS3514 is a PC switching power-supply
Lockout: 12V, 5V, and 3.3V Supplies
system monitor with minimum external components.
It
provides
under-voltage
lockout
(UVLO),
Over-Current Protection and
over-voltage (OV), under-voltage (UV), over-current
Lockout: 12V, 5V, and 3.3V Supplies
(OC) protection circuits, power-good indicator, and
Under-Voltage Protection and
on/off control.
Lockout: 12V Supplies
UVLO thresholds are 4.45V (on) and 3.65V (off).
Under-Voltage Detect: 5V and 3.3V Supplies
Over-current
protection
(OCP)
and
over-voltage
Fault-Protection Output with Open-Drain
protection
(OVP)
monitor
3.3V,
5V,
and
12V
Output Stage
supplies. When an OC or OV condition is detected,
the power-good output (PGO) is asserted low and
Open-Drain, Power-Good Output Signal:
the fault protection output (FPO) is latched high.
Monitors Power-Good Signal Input 3.3V and
PSON from low-to-high resets the latch. The OCP
5V Supplies
function will be enabled 75ms after PSON goes LOW
300ms Power-Good Delay
with PGI HIGH and a debounce of typically 38ms. A
75ms Delay: 5V, 3.3V Power-Supply
built-in 2.3ms delay with 38ms debounce from PSON
to FPO output is enabled at turn-off.
Short-Circuit Turn-On Protection
2.3ms PSON Control To FPO Turn-Off Delay
An external resistor is connected between the RI pin
and the GND pin. This will program a precise I(REF)
38ms PSON Control Debounce
for OCP function. The programmable I(REF) range is
Wide Supply Voltage Range: 4.5V to 15V
from 12.5
A to 62.5A. Three OCP comparators and
the I(REF) section are supplied by VS12. The current
draw from the VS12 pin is less than 1mA.
The power-good feature monitors PGI, the 3.3V and
5V supplies, and issues a power-good signal when
the output is ready.
The TPS3514 is characterized for operation from
–40
°C to +85°C. The TPS3514 is available in DIP-14
and SO-14 packages.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright 2002–2006, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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