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TPS25944L データシート(PDF) 8 Page - Texas Instruments

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部品番号 TPS25944L
部品情報  5A eFuse Power MUX with Multiple Protection Modes
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI1 - Texas Instruments

TPS25944L データシート(HTML) 8 Page - Texas Instruments

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TPS25942A, TPS25942L, TPS25944A, TPS25944L
SLVSCE9A – JUNE 2014 – REVISED MARCH 2015
www.ti.com
8.6 Timing Requirements
Conditions are –40°C
≤ TJ = TA ≤ 125°C, 2.7 V ≤ V(IN) ≤ 18 V, V(EN/UVLO) = 2 V, V(OVP) = V(DMODE) = V(PGTH) = 0 V, R(ILIM) = 150
k
Ω, C(OUT) = 1 µF, C(dVdT) = OPEN, PGOOD = FLT = IMON = OPEN. Positive current into terminals. All voltages referenced to
GND (unless otherwise noted). Refer to Figure 47 for timing diagrams.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ENABLE and UVLO INPUT
EN/UVLO
↑ (100mV above V(ENR)) to V(OUT) = 100 mV,
220
µs
C(dVdT) < 0.8 nF
tON(dly)
EN turn on delay
EN/UVLO
↑ (100mV above V(ENR)) to V(OUT) = 100 mV,
100 + 150 x
µs
C(dVdT) ≥ 0.8 nF, see , [C(dVdT) in nF]
C(dVdT)
tOFF(dly)
EN turn off delay
EN/UVLO
↓ (100mV below V(ENF)) to FLT↓
2
µs
OVERVOLTAGE PROTECTION INPUT (OVP)
tOVP(dly)
OVP disable delay
OVP
↑ (100mV above V(OVPR)) to FLT↓
2
µs
DIODE MODE INPUT: ACTIVE HIGH (DMODE)
DMODE
↓ to (V(IN) -V(OUT)) ≤ 200 mV, with 1 A resistive
DMODE turn-on delay
2
µs
load at OUT
tDMODE
DMODE
↑ to (V(IN) -V(OUT)) > 200 mV, 1 A resistive load at
DMODE turn-off delay
220
ns
OUT
OUTPUT RAMP CONTROL (dVdT)
EN/UVLO
↑ to V(OUT) = 4.5 V, with C(dVdT) = open
0.12
tdVdT
Output ramp time
EN/UVLO
↑ to V(OUT) = 11 V, with C(dVdT) = open
0.25
0.37
0.5
ms
EN/UVLO
↑ to V(OUT) = 11 V, with C(dVdT) = 1 nF
0.97
CURRENT LIMIT
tFASTRIP(dly)
Fast-Trip comparator delay
I(OUT) > I(FASTRIP)
200
ns
REVERSE PROTECTION COMPARATOR
(V(IN) - V(OUT))↓ (1 mV overdrive below V(REVTH)) to FLT↓
10
tREV(dly)
Reverse protection comparator
(V(IN) - V(OUT))↓ (10 mV overdrive below V(REVTH)) to FLT↓
1
µs
delay
tFWD(dly)
(V(IN) - V(OUT))↑ (10 mV overdrive above V(FWDTH)) to FLT↑
3.1
POWER-GOOD COMPARATOR OUTPUT (PGOOD): ACTIVE HIGH
TPS25942: Rising edge
0.42
0.54
0.66
tPGOODR
ms
PGOOD delay (de-glitch) time
TPS25944: Rising edge
4
tPGOODF
TPS25942 and TPS25944: Falling edge
10
µs
FAULT FLAG (FLT)
FLT assertion delay in Circuit
TPS25944 Only; Delay from I(OUT) > I(LIM) to FLT↓ (and
tCB(dly)
4
ms
Breaker mode
internal FET turned off)
TPS25944A Only; Circuit breaker fault asserted, Delay
tCB(Retrydly)
Retry Delay in Circuit Breaker Mode
128
ms
from to FLT
↓ to FLT↑ edge
THERMAL SHUT DOWN (TSD)
Retry delay in TSD
TPS25942A and TPS25944A Only
128
ms
8
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