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參數資料
型號: TPS2481PW
廠商: TEXAS INSTRUMENTS INC
元件分類: 電源管理
英文描述: POWER SUPPLY SUPPORT CKT, PDSO20
封裝: GREEN, PLASTIC, TSSOP-20
文件頁數: 15/56頁
文件大小: 1381K
代理商: TPS2481PW
J(MAX2)
A(MAX)
CA
JC
T
150
T
50
R
9 8
R
0 2
1 18
=
W
DS( on )
C
C,
.
,
.
,R
.
m
W
q
2
J(MAX2)
CA
LIMIT(NOM)
DSON
A(MAX)
LIM
C
0.7*(T
R
I
R
T
P
249
R
-
-
=
J
)
W
q
REF
OUT(NOM)
LIMIT(NOM)
V
4
1
V
12
I
50
S
V ,R
m ,
V ,
A
=
W
=
REF
LIM(MAX)
1V
V
P
2
S
kW
R
=
OUT(NOM)
LIMIT(NOM)
P
V
I
12
50
600
V
A
W
=
=
=
LIM(ACT)
S
PROG
2
P
R
2
249W
1m
V
0.498V
1V
=
REF
PROG1
PROG2
PROG
V
R
(
1)
140.6k
V
=
-
=
0
10
8
6
4
2
0
10
20
30
40
50
60
Current Limit vs. Vout (Vvcc=12V)
Output Voltage (V)
O
u
tp
u
t
C
u
r
re
n
t
(
A
m
p
s
)
SLUS939B – APRIL 2010 – REVISED DECEMBER 2010
www.ti.com
3. Choose the Power Limit PLIM and the PROG Resistors, RPROG1 and RPROG2
M1 dissipates large amounts of power during power-up or output short circuit. Power limit, PLIM should be set to
prevent M1 die temperature from exceeding a short term maximum temperature, TJ(MAX2). Short term TJ(MAX2)
may be set as high as 150°C while still leaving ample margin for the typical manufacturer's rating of 175°C. PLIM
can be estimated as follows:
(10)
(11)
Where RqCA is M1+PCB case-to-ambient thermal resistance, RqJC is M1 junction-to-case thermal resistance,
RDS(on) is M1 channel resistance at the maximum operating temperature, and the factor of 0.7 accounts for the
tolerance of the constant power engine. The maximum power limit for the constant power engine, PLIM(MAX) and
nominal power POUT(nom) settings for this circuit are calculated with the next equation:
(12)
(13)
(14)
The PROG resistors should be chosen using the smallest of PLIM , PLIM(MAX), or PLIM(MAX) values. Choose RPROG2
= 20 k
. Choose RPROG1 as shown below.
(15)
(16)
Choose RPROG1 = 140 k
The power and current limit curve for this configuration is shown in Figure 18.
Figure 18. TPS2480/81 Power and Current Limit Curve
22
Copyright 2010, Texas Instruments Incorporated
Product Folder Link(s): TPS2480 TPS2481
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相關代理商/技術參數
參數描述
TPS2481PWR 功能描述:熱插拔功率分布 Pos VltgInt Prot Dev/Hotswap Cntrlr 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
TPS2482PW 制造商:Texas Instruments 功能描述:Hot Swap Controller 1-CH 80V 20-Pin TSSOP Tube 制造商:Texas Instruments 功能描述:IC CTRLR HOT SWAP 9-36V 20TSSOP 制造商:Texas Instruments 功能描述:36V Hotswap Cntlr w/ Digital Pwr Monitor
TPS2482PWR 制造商:Texas Instruments 功能描述:Hot Swap Controller 1-CH 80V 20-Pin TSSOP T/R 制造商:Texas Instruments 功能描述:36V Hotswap Cntlr w/ Digital Pwr Monitor
TPS2483EVM-157 功能描述:電源管理IC開發工具 TPS2483 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
TPS2483PW 功能描述:Hot Swap Controller, Monitor 1 Channel General Purpose 20-TSSOP 制造商:texas instruments 系列:- 包裝:管件 零件狀態:有效 類型:熱交換控制器,監控器 通道數:1 內部開關:無 應用:通用 特性:自動重試,I2C,UVLO 可編程特性:限流,故障超時 電壓 - 電源:9 V ~ 80 V 電流 - 輸出(最大值):- 工作溫度:-40°C ~ 85°C 電流 - 電源:2mA 安裝類型:表面貼裝 封裝/外殼:20-TSSOP(0.173",4.40mm 寬) 供應商器件封裝:20-TSSOP 功能引腳:EN,PG,PROG,TIMER 標準包裝:70
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