- 您現在的位置：買賣IC網 > Datasheet目錄47 > TPS2491DGSG4 (Texas Instruments)IC POS HV HOT-SWAP CTRLR 10-MSOP Datasheet資料下載
參數資料
| 型號： | TPS2491DGSG4 |
| 廠商： | Texas Instruments |
| 文件頁數： | 15/25頁 |
| 文件大小： | 925K |
| 描述： | IC POS HV HOT-SWAP CTRLR 10-MSOP |
| 標準包裝： | 80 |
| 類型： | 熱交換控制器 |
| 應用： | 通用 |
| 內部開關： | 無 |
| 電源電壓： | 9 V ~ 80 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 10-TFSOP，10-MSOP（0.118"，3.00mm 寬） |
| 供應商設備封裝： | 10-MSOP |
| 包裝： | 管件 |
| 配用： | 296-18947-ND - EVAL MODULE FOR TPS2491-002 |
ON
+
1.35 V
R2
R1)R2
V
OFF
+
1.25 V
R2
R1)R2
T
+ 8.5 10
*6
t
ON
1 ) C
OUT_TOL
) C
T_TOL
C
O
P
LIM
2 I
2
LIM
)
C
O
V
2
VCC(MAX)
2 P
LIM
if P
LIM
t I
LIM
V
VCC(MAX)
ON
+
C
O
V
VCC(MAX)
I
LIM
if P
LIM
w I
LIM
V
VCC(MAX)
PROG
+
P
LIM
10 I
LIM
where I
LIM
+
0.05
R
S
R4
R3 ) R4
+
V
PROG
V
REF
LIM
v 0.7
T
J(MAX)2
*
I
2
MAX
R
DSON
R
qCA
) T
A(MAX)
R
DSON(MAX)
v
T
J(MAX)
* T
A(MAX)
R
qJA
I
2
MAX
TPS2490
TPS2491
www.ti.com
SLVS503D NOVEMBER 2003REVISED JULY 2012
(5)
where T
J(MAX)
is the desired maximum steady-state junction temperature (typically 125癈), and T
A(MAX)
is the
maximum ambient temperature. R
窲A
, the junction-to-ambient thermal resistance, depends upon the package
style chosen and the details of heat-sinking and cooling. Note the R
窲C
and R
窲A
for use below.
STEP 3. Choose P
LIM
, R3, R4
M1 dissipates large amounts of power during power-up or output short circuit. The power limit P
LIM
of the
TPS2940/91 should be set to prevent the die temperature from exceeding a short term maximum temperature,
T
J(MAX)2
. The short-term T
J(MAX)2
could be set as high as 150癈 while still leaving ample margin to the usual
manufacturers rating of 175癈. An expression for calculating P
LIM
is:
(6)
where R
窲C
is M1 junction-to-case thermal resistance, R
DS(on)
is the channel resistance at the maximum operating
temperature, and the factor of 0.7 represents the tolerance of the constant power engine. Next calculate V
PROG
and the divider resistors R3 and R4. R3 must be greater than 4 k&, but it is recommended that 10 k& or greater
be used.
(7)
STEP 4. Choose t
ON
, C
T
The on-time, t
ON
, set by capacitor C
T
must suffice to fully charge the load capacitance C
O
without triggering the
fault circuitry. Assuming that only the load capacitance draws current during startup:
(8)
Using this value of t
ON
, C
T
is computed as:
(9)
where C
T_TOL
and C
OUT_TOL
are the tolerances associated with each capacitor. Assuming C
O
is a 20% tolerance
part, C
OUT_TOL
has a value of 0.2. This expression assures the worst case set of parts will always start.
STEP 5. Choose The Turn On Voltage, R1 and R2
Assuming that EN is used as an analog input, the turn-on voltage, V
ON
and turn-off voltage, V
OFF
are defined as:
(10)
Use caution in selecting large values of R1 and R2 because the leakage current causes errors in the threshold
voltages.
Copyright ?20032012, Texas Instruments Incorporated
15
相關PDF資料 |
PDF描述 |
|---|---|
| W83772G | IC H/W MONITOR 8-TSSOP |
| W83L786G | IC H/W MONITOR 28-SSOP |
| X96011V14IZ | IC SENSOR TEMP BIAS SGL 14-TSSOP |
| XR4151CP-F | IC CONV VF/FV 8PDIP |
| XRP7714ILB-0X14-F | IC REG 5OUT BCK/LINEAR 40TQFN |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS2491DGSR | 功能描述:熱插拔功率分布 Retry Pos Hi-Voltage Pwr-Limiting 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 |
| TPS2491DGSRG4 | 功能描述:熱插拔功率分布 Retry Pos Hi-Voltage Pwr-Limiting 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 |
| TPS2491EVM-002 | 功能描述:電源管理IC開發工具 TPS2491-002 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 |
| TPS2492EVM-001 | 功能描述:電源管理IC開發工具 TPS2492 Hot Swap Controller 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 |
| TPS2492EVM-003 | 功能描述:電源管理IC開發工具 TPS2492 Hot Swap Controller 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 |
發布緊急采購，3分鐘左右您將得到回復。