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| 型號： | TPS3513N |
| 英文描述： | Analog IC |
| 中文描述： | 模擬IC |
| 文件頁數(shù)： | 2/14頁 |
| 文件大小： | 237K |
| 代理商： | TPS3513N |
TPS3513
PC POWER SUPPLY SUPERVISORS
SLVS313 – FEBRUARY 2001
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description (continued)
UVLO thresholds are 4.45 V (on) and 3.65 V (off). Overcurrent protection (OCP) and overvoltage protection
(OVP) monitor 3.3 V, 5 V, and 12 V. When an OC or OV condition is detected, the power-good 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 75 ms after PSON goes low, and a debounce of typically 38 ms. A built-in
2.3-ms delay with 38-ms debounce from PSON to FPO output is enabled at turnoff.
An external resistor is connected between the RI pin and the GND pin. This will introduce an accurate I
(ref)
for
OCP function. The I
(ref)
range is from 12.5
μ
A to 62.5
μ
A. The formula for choosing RI resistor is V
(RI)
/I
(ref)
. Three
OCP comparators and the I
(ref)
section are supplied by VS12. The current draw from the VS12 pin is less
than 1 mA.
The power good feature monitors PGI, 3.3 V and 5 V, and issues a power good signal when the output is ready.
The TPS3513 is characterized for operation from –40
°
C to 85
°
C.
FUNCTION TABLE
PGI
PSON
UV CONDITION
3.3 V / 5 V
OV CONDITIONS
UV CONDITION 12 V
OC CONDITIONS
FPO
PGO
< 0.9 V
L
No
No
No
L
L
< 0.9 V
L
No
No
Yes
L
L
< 0.9 V
L
No
Yes
No
H
L
< 0.9 V
L
No
Yes
Yes
H
L
< 0.9 V
L
Yes
No
No
L
L
< 0.9 V
L
Yes
No
Yes
L
L
< 0.9 V
L
Yes
Yes
No
H
L
< 0.9 V
L
Yes
Yes
Yes
H
L
1.0 V < PGI < 1.1 V
L
No
No
No
L
L
1.0 V < PGI < 1.1 V
L
No
No
Yes
H
L
1.0 V < PGI < 1.1 V
L
No
Yes
No
H
L
1.0 V < PGI < 1.1 V
L
No
Yes
Yes
H
L
1.0 V < PGI < 1.1 V
L
Yes
No
No
H
L
1.0 V < PGI < 1.1 V
L
Yes
No
Yes
H
L
1.0 V < PGI < 1.1 V
L
Yes
Yes
No
H
L
1.0 V < PGI < 1.1 V
L
Yes
Yes
Yes
H
L
>1.2 V
L
No
No
No
L
H
>1.2 V
L
No
No
Yes
H
L
>1.2 V
L
No
Yes
No
H
L
>1.2 V
L
No
Yes
Yes
H
L
>1.2 V
L
Yes
No
No
H
L
>1.2 V
L
Yes
No
Yes
H
L
>1.2 V
L
Yes
Yes
No
H
L
>1.2 V
L
Yes
Yes
Yes
H
L
x
H
x
x
x
H
L
x = don’t care
FPO = L means: fault is not latched
FPO = H means: fault is latched
PGO = L means: fault
PGO = H means: No fault
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