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參數(shù)資料
| 型號： | TPS2480PW |
| 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(shù)： | 18/56頁 |
| 文件大?。?/td> | 1381K |
| 代理商： | TPS2480PW |
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D
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L
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IM
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IN
M
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IN
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D
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C
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S
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G
A
T
E
O
U
T
P
G
C
T
R
PROG1
R
PROG2
R
SDA
10kW
R
SDA
10kW
C
VS
0.1mF
C
EN
0.1mF
R
EN2
SDA
SCL
3P3V_USB
R
EN1
VCC
R
S
R
G
D1
VCC
VOUT
C
O
1kW
C
G
R
PG
C
1
0.1mF
A0
A1
Optional :
Use with dV/dt control
T
P
S
2
4
8
0
/1
I2C
Addresses
+
R
B
D2
5.1V
C2
0.1mF
C
VIN
R
MB
R
IN
R
MA
M1
VIN
9V to 57V
www.ti.com
SLUS939B – APRIL 2010 – REVISED DECEMBER 2010
High Voltage Application Example
The TPS2480/81 can be used to monitor current from a voltage source greater than 26 V by using the OPAMP
circuit shown in Figure 19.
Figure 19. TPS2480/81 High Voltage Application
The basic operating principle of U2, Q1, RMA, and RMB is to mirror the voltage seen across RS from a VCC
referenced voltage to a GND referenced voltage. As load current flows through RS, the voltage input to U2-3
decreases and the output of U2/Q1 as seen at Q1-S follows this sense voltage. Ideally, the voltage drop across
RMA mirrors the voltage drop across RS. Current flow through RMB will mirror current flow through RMA , and if
RMA = RMB then the sense voltage across RS is mirrored at VINP.
Since only a small voltage will be across RMA and RMB, their nominal value should be fairly low to offset input
bias current effects (IVINP). TPS2480/1 input bias current sums with the current that flows through RMA increasing
the voltage drop across RMB. To block the bias current from RMB, an additional buffer may be inserted between
Q1-D and VINP. Using a network type resistor for RMA and RMB designed with temperature coefficient tracking
will provide good voltage mirroring.
U2 should be a high quality, low drift operational amplifier. The OPA333AID provides low input voltage offset and
very low drift over time and temperature. U2 is referenced to VCC through D2 and RB and can operate from rail
to rail.
Copyright 2010, Texas Instruments Incorporated
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS2480PWR | 功能描述:熱插拔功率分布 Pos Vltg,Int Prot Dev/Hotswap Cntrlr 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 |
| TPS2481EVM-001 | 功能描述:電源管理IC開發(fā)工具 Eval Mod for TPS2481 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 |
| TPS2481PW | 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(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 |
| 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(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 |
| 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 |
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