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參數(shù)資料
| 型號： | TPS2070DAP |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | FOUR-PORT USB HUB POWER CONTROLLERS |
| 中文描述： | 4端口USB集線器電源控制器 |
| 文件頁數(shù)： | 20/29頁 |
| 文件大?。?/td> | 472K |
| 代理商： | TPS2070DAP |
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TPS2070, TPS2071
FOUR-PORT USB HUB POWER CONTROLLERS
SLVS287A
–
SEPTEMBER 2000
–
REVISED FEBRUARY 2001
20
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 36
100
50
0
6
6.5
7
7.5
150
200
SUPPLY CURRENT
vs
INPUT VOLTAGE
250
8
8.5
9
–
–
I
A
μ
VI(VEXT)
–
Input Voltage
–
V
VI(BP) = 5 V,
EN_REG = LOW,
C(VCP) = 0.1
μ
F,
C(CP_P) = 0.01
μ
F,
TA = 25
°
C
Figure 37
2.75
2.7
2.65
2.6
–
50
0
50
2.8
2.85
UNDERVOLTAGE LOCKOUT
vs
JUNCTION TEMPERATURE
2.9
100
150
V
–
–
TJ
–
Junction Temperature
–
°
C
Start Threshold
Stop Threshold
APPLICATION INFORMATION
external capacitor requirements
A 0.1-
μ
F ceramic bypass capacitor and a 10-
μ
F bulk capacitor between BP and AGND, close to the device, are
recommended. Similarly, a 0.1-
μ
F ceramic and a 68-
μ
F bulk capacitor, from SP to AGND, and from VEXT to
AGND if an external 5-V LDO is required, are recommended because of much higher current in the self-powered
mode.
From each of the outputs (OUTx) to ground, a 33-
μ
F or higher valued bulk capacitor is recommended when the
output load is heavy. This precaution reduces power-supply transients. Additionally, bypassing the outputs with
a 0.1-
μ
F ceramic capacitor improves the immunity of the device to short-circuit transients.
An output capacitor connected between 3.3V_OUT and GND is required to stabilize the internal control loop.
The internal LDO is designed for a capacitor range of 4.7
μ
F to 33
μ
F with an ESR of 0.2
to 10
. Solid
tantalum-electrolytic, aluminum-electrolytic and multilayer ceramic capacitors are all suitable.
Ceramic capacitors have different types of dielectric material, each exhibiting different temperature and voltage
variations. The most common types are X5R, X7R, Y5U, Z5U, and NPO. The NPO type ceramic capacitors are
generally the most stable over temperature. However, the X5R and X7R are also relatively stable over
temperature (with the X7R being the more stable of the two) and are therefore acceptable for use. The Y5U and
Z5U types provide high capacitance in a small geometry, but exhibit large variations over temperature. For this
reason, the Y5U and Z5U are not generally recommended.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TPS2070DAP | 制造商:Texas Instruments 功能描述:Controller IC |
| TPS2070DAPG4 | 功能描述:熱插拔功率分布 Pwr Controller for Bus/Self Pwrd Hub 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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| TPS2071DAP | 功能描述:熱插拔功率分布 Pwr Cntrlr for Bus/ 4-Port USB Hub 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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| TPS2071DAP | 制造商:Texas Instruments 功能描述:IC PCMCIA PWR I/F SW 32-HTSSOP 制造商:Texas Instruments 功能描述:IC, PCMCIA PWR I/F SW 32-HTSSOP |
| TPS2071DAPG4 | 功能描述:熱插拔功率分布 Pwr Cntrlr for Bus/ 4-Port USB Hub 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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
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