TPS3514
www.ti.com
SLVS422A 鈥?JULY 2003
PC POWER-SUPPLY SUPERVISORS
FEATURES
D
OVER-VOLTAGE PROTECTION AND LOCKOUT: 12V,
D
OVER-CURRENT PROTECTION AND LOCKOUT:
D
12V, 5V, and 3.3V Supplies
UNDER-VOLTAGE PROTECTION AND
LOCKOUT: 12V Supplies
5V, and 3.3V Supplies
DESCRIPTION
The TPS3514 is a PC switching power-supply system monitor
with minimum external components. It provides under-voltage
lockout (UVLO), over-voltage (OV), under-voltage (UV),
over-current (OC), protection circuits, power-good indicator, and
on/off control.
UVLO thresholds are 4.45V (on) and 3.65V (off). Over-current
protection (OCP) and over-voltage protection (OVP) monitor 3.3V,
5V, and 12V supplies. When an OC or OV condition is detected,
the power鈥揼ood output (PGO) is asserted LOW and the fault
protection output (FPO) is latched HIGH. PSON from
LOW-to-HIGH resets the latch. The OCP function will be enabled
75ms after PSON goes LOW with PGI HIGH and a debounce of
typically 38ms. A built-in 2.3ms delay with 38ms debounce from
PSON to FPO output is enabled at turn鈥搊ff.
An external resistor is connected between the RI pin and the GND
pin. This will program a precise I
(REF)
for OCP function. The
programmable I
(REF)
range is from 12.5碌A(chǔ) to 62.5碌A(chǔ). 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鈥揼ood feature monitors PGI, the 3.3V and 5V supplies,
and issues a power鈥揼ood signal when the output is ready.
The TPS3514 is characterized for operation from 鈥?0擄C to 85擄C.
The TPS3514 is available in DIP-14 and SO-14 packages.
D
UNDER-VOLTAGE DETECT: 5V and 3.3V Supplies
D
FAULT-PROTECTION OUTPUT WITH
OPEN鈥揇RAIN OUTPUT STAGE
D
D
D
D
D
D
OPEN-DRAIN, POWER-GOOD OUTPUT SIGNAL:
Monitors Power鈥揋ood Signal Input 3.3V and 5V
Supplies
300ms POWER-GOOD DELAY
75ms DELAY: 5V, 3.3V Power-Supply Short-Circuit
Turn-On Protection
2.3ms PSON CONTROL TO FPO TURN鈥揙FF DELAY
38ms PSON CONTROL DEBOUNCE
WIDE SUPPLY VOLTAGE RANGE: 4.5V to 15V
0.01鈩?/div>
12V
IO
12V
0.01鈩?/div>
5V
0.01鈩?/div>
3.3V
5V VSB
5V
3.3V
5V VSB
PG
From Transformer
R1
鈩?/div>
R2
鈩?/div>
470k鈩?/div>
TPS3514
PGO
VDD
VS5
VS33
VS12
1k鈩?/div>
PGI
GND
System Side
560鈩?/div>
FPO
PSON
IS12
56k鈩?/div>
RI
NC
Power Supply
Output Side
820鈩?/div>
IS33
1.5k鈩?/div>
IS5
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. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright
錚?/div>
2002鈥?003, Texas Instruments Incorporated
TPS3514DR 產(chǎn)品屬性
2,500
集成電路 (IC)
PMIC - 監(jiān)控器
-
多壓監(jiān)控器
3
開路漏極或開路集電極
低有效
最小為 200 ms
3.3V，5V，12V
-40°C ~ 85°C
表面貼裝
14-SOIC（0.154"，3.90mm 寬）
14-SOIC
帶卷 (TR)
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