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參數資料
| 型號： | TPS2492PW |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO14 |
| 封裝： | GREEN, PLASTIC, TSSOP-14 |
| 文件頁數： | 16/33頁 |
| 文件大小： | 1096K |
| 代理商： | TPS2492PW |
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(
)
2
LIM(ACT)
VCC(MAX)
LIM
VCC(MAX)
LIMIT(NOM)
2
LIMIT(NOM)
LIM(ACT)
P
V
For P
V
I
2
I
2
P
<
=
+
O
ON
C
: t
Power Limit
(
)
VCC(MAX)
LIM
VCC(MAX)
LIMIT(NOM)
V
For P
V
I
=
O
ON
C
: t
Current Limit Only
2
VCC(MAX)
LIM
2
LIMIT(NOM)
LIM
V
P
1000
13 5
1000
249W
416
2
I
2
P
2
50
2
249W
=
+
=
+
=
O
ON
C
F
. V
F
t
s
A
m
SOURCE(MAX)
T
O-TOL
T-TOL
TMR-TH(MAX)
I
C
1 C
C
V
ON
t
(
)
=
+
T
36
C
416
1
0 2
0 1
4 75
4.1V
=
+
=
A
s (
.
. )
.
nF
m
www.ti.com
SLUSA65A – JULY 2010 – REVISED AUGUST 2010
4. Choose the TIMER Capacitor, CT and Turn-On Time
The turn on time tON, represents the time it takes the circuit to charge up the output capacitance CO and load. CT
programs the fault time and should be chosen so that the fault timer does not terminate prior to completion of
start up. The turn on time is a function of the type of control; current limit, power limit, or dV/dt control. The
following equations calculates tON for the power limit and current limit cases, and assume that only CO draws
current during startup.
(12)
(13)
(14)
The next equation computes CT for a TPS2492 application. TPS2492/93 TIMER current source and capacitor
tolerances are accounted for.
(15)
(16)
Choose CT = 6.8 nF assuming a 20% output capacitor tolerance and a 10% timing capacitor tolerance.
Equation 16 is written around startup for a TPS2492, however during a restart (after a fault) of a TPS2493, CT
charges from 1 V to 4.1 V, requiring a VTMR-TH(MAX) value of 3.1V.
The maximum TIMER period may be calculated using the minimum TIMER charge current and maximum value
of CT. Use this period to determine the transient RqJC in step 3. While this is beyond the scope of this example, it
may lead to some iteration.
Copyright 2010, Texas Instruments Incorporated
23
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS2492PW | 制造商:Texas Instruments 功能描述:HOT SWAP CONTROLLER IC 80V TSSOP-14 |
| TPS2492PWR | 功能描述:熱插拔功率分布 Pos Hi-Vltg Pwr-Ltd Hotswap Controller RoHS:否 制造商:Texas Instruments 產品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| TPS2493EVM-002 | 功能描述:電源管理IC開發工具 TPS2493 Hot Swap ontroller Eval Mod RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS2493EVM-004 | 功能描述:電源管理IC開發工具 TPS2493 Hot Swap ontroller Eval Mod RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS2493PW | 功能描述:熱插拔功率分布 Pos Hi-Vltg Pwr-Ltd Hotswap Controller RoHS:否 制造商:Texas Instruments 產品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
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