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參數(shù)資料
| 型號： | TPS2376DDAR-H |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | GREEN, PLASTIC, POWER PAD, SOIC-8 |
| 文件頁數(shù)： | 19/23頁 |
| 文件大?。?/td> | 640K |
| 代理商： | TPS2376DDAR-H |
www.ti.com
1
2
3
4
5
6
7
8
VSS
CLASS
UVLO
DET
RTN
PG
VDD
ILIM
Detailed Pin Description
I(LIM) =
40000
R(ILIM)
(1)
SLVS646A – SEPTEMBER 2006 – REVISED SEPTEMBER 2006
DEVICE INFORMATION (continued)
TPS2376-H
(TOP VIEW)
TERMINAL FUNCTIONS
PIN NUMBER
PIN NAME
I/O
DESCRIPTION
'76-H
Connect a resistor from ILIM to VSS to set the start-up inrush current limit. The equation
ILIM
1
O
for calculating the resistor is shown in the detailed pin description section for ILIM.
Connect a resistor from CLASS to VSS to set the classification of the powered device
CLASS
2
O
(PD). The IEEE classification levels and corresponding resistor values are shown in
DET
3
O
Connect a 24.9-k
detection resistor from DET to VDD.
VSS
4
I
Return line on the source side of the TPS2376-H from the PSE.
RTN
5
O
Switched output side return line used as the low-side reference for the TPS2376-H load.
PG
6
O
Open-drain, power-good output, active high, referenced to RTN.
UVLO comparator input that controls pass-device turn-on and off. Connect UVLO to a
UVLO
7
I
resistor divider from VDD to VSS.
VDD
8
I
Positive line from the rectified PSE provided input.
The PowerPad must be connected to VSS. The VSS copper on the circuit board must be
PowerPad
-
I
a large fill area to assist in heat dissipation.
The following descriptions refer to the schematic of Figure 1 and the functional block diagram.
ILIM: A resistor from this pin to VSS sets the inrush current limit per Equation 1:
where ILIM is the desired inrush current value, in Amperes, and R(ILIM) is the value of the programming resistor
from ILIM to VSS, in ohms. The practical limits on R(ILIM) are 125 k to 1 M. A value of 287 k is
recommended for compatibility with legacy power sourcing equipment (PSE).
Inrush current limiting prevents current drawn by the bulk capacitor from causing the line voltage to sag below
the lower UVLO threshold. Adjustable inrush current limiting allows the use of arbitrarily large capacitors and
also accommodates legacy systems that require low inrush currents.
The ILIM pin must not be left open or shorted to VSS.
CLASS: Classification is implemented by means of an external resistor, R(CLASS), connected between CLASS
and VSS. The controller draws current from the input line through R(CLASS) when the input voltage lies between
13 V and 21 V. The classification currents specified in the electrical characteristics table include the bias current
flowing into VDD and any RTN leakage current.
A high power system will not meet the standard power CLASS ranges defined in IEEE 802.3af, which are shown
for reference in Table 1. An end-to-end high power system may either redefine the CLASS power, or dispense
with CLASS entirely.
The CLASS pin must not be shorted to ground.
5
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| TPS2376DDAR-HG4 | 功能描述:熱插拔功率分布 IEEE 802.3af PoE Hi Pwr PD CONTROLLER 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 |
| TPS2376DG4 | 功能描述:熱插拔功率分布 IEEE 802.3af PoE Pwr Device Cntrler 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 |
| TPS2376DR | 功能描述:熱插拔功率分布 IEEE 802.3af PoE Pwr Device Cntrler 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 |
| TPS2376DRG4 | 功能描述:熱插拔功率分布 IEEE 802.3af PoE Pwr Device Cntrler 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 |
| TPS2376HEVM | 功能描述:電源管理IC開發(fā)工具 TPS2376H Evaluation Module 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 |
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