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參數(shù)資料
| 型號： | TPS2393DBTRG4 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | FULL-FEATURED-48-V HOTSWAP POWER MANAGER |
| 中文描述： | 全功能- 48 - V熱切換電源管理器 |
| 文件頁數(shù)： | 22/34頁 |
| 文件大小： | 567K |
| 代理商： | TPS2393DBTRG4 |
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SLUS536C AUGUST 2002 REVISED AUGUST 2004
www.ti.com
22
APPLICATION INFORMATION
With this information, the minimum recommended value timing capacitor C
FLT
can be determined. The delay
time needed will be either t
SS
or the sum of t
SS
and t
CC
, according to the estimated time to charge the load.
Since fault timing is generated by the constant-current charging of C
FLT
, the capacitor value is determined by
equation (6) or (7).
C
FLT(min)
55
t
SS
3.75
C
FLT(min)
55
t
SS
3.75
t
CC
where:
C
FLT(min)
is the recommended capacitor value, in microfarads
t
SS
is the result of equation (3), in seconds
t
CC
is the result of equation (5), in seconds
For the typical application example, with the 100-
μ
F filter capacitor in front of the dc-to-dc converter, equations
(3) and (4) estimate the load voltage ramping to 46 V during the soft-start period. If the module should operate
down to 72-V input supply, approximately another 1.58 ms of constant-current charging may be required.
Therefore, equation (7) is used to determine C
FLT(min)
, and the result is approximately 0.1
μ
F.
setting the undervoltage and overvoltage thresholds
The UVLO and OVLO pins can be used to set the undervoltage (V
UV
) and overvoltage (V
OV
) thresholds of the
hot swap circuit. When the input supply is below V
UV
or above V
OV
, the GATE pin is held low, disconnecting
power from the load, and deasserting the PG output. When input voltage is within the UV/OV window, the GATE
drive is enabled, assuming all other input conditions are valid for turn-on.
Threshold hysteresis is provided via two internal sources which are switched to either pin whenever the
corresponding input level exceeds the internal 1.4-V reference. The additional bias shifts the pin voltage in
proportion to the external resistance connected to it. This small voltage shift at the device pin is gained up by
the external divider to input supply levels.
UDG20119
R8
R2
R1
R7
GND
48V
GND
48V
VIN
RTN
TPS2392/93*
UVLO
OVLO
VIN
RTN
TPS2392/93*
UVLO
OVLO
R1
200 k
1%
R2
4.99 k
1%
R3
3.92 k
1%
(a)
(b)
V
OV_L
R1
R2
R3
R3
V
REF
I
SRC_UV
R1
V
UV_L
R1
R2
R3
R2
R3
V
REF
V
OV_L
R7
R8
R8
V
TH_OV
V
UV_L
R1
R2
R2
V
TH_UV
*Additional details omitted for clarity. See block diagram on page 15 and 16 for pinout.
Figure 28. Programming the Undervoltage and Overvoltage Thresholds
(6)
(7)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS2393EVM | 功能描述:電源管理IC開發(fā)工具 Simple -48V Hot Swap Contr EVM RoHS:否 制造商:Maxim Integrated 產(chǎn)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 |
| TPS2393PW | 功能描述:熱插拔功率分布 Full Featured -48V Industral Temp. RoHS:否 制造商:Texas Instruments 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| TPS2393PWG4 | 功能描述:熱插拔功率分布 Full Featured -48V Industral Temp. RoHS:否 制造商:Texas Instruments 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| TPS2393PWR | 功能描述:熱插拔功率分布 Full Featured -48V Industral Temp. RoHS:否 制造商:Texas Instruments 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| TPS2393PWRG4 | 功能描述:熱插拔功率分布 Full Featured -48V Industral Temp. RoHS:否 制造商:Texas Instruments 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
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