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参数资料
| 型号： | TPS2370D |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封装： | GREEN, PLASTIC, MS-012AA, SOIC-8 |
| 文件页数： | 12/17页 |
| 文件大小： | 426K |
| 代理商： | TPS2370D |
TPS2370
SLUS537C AUGUST 2002 REVISED MARCH 2004
www.ti.com
4
TERMINAL FUNCTIONS
TERMINAL
I/O
DESCRIPTION
NAME
NO.
I/O
DESCRIPTION
CLASS
2
O
Sets classification level with a single resistor to VEE. A precision voltage of 10 V is applied to this pin during
classification. RCLASS values listed in Table 1.
DET
3
O
Connect the 24.9-k
detection resistor (RDET) between this pin and VDD.
EN_DC
6
O
Ties to dc-to-dc converter’s shutdown or soft-start pin. Sinks 80
A until the load capacitor is fully charged.
ILIM
1
O
Sets start-up current limit level with a resistor to VEE. If using CDC2DCIN > 180 F, IRUSH must be less than
400 mA. Extra capacitance on ILIM pin can cause oscillations in the current waveform.
RTN
5
O
Return pin. Connect this pin to input return side of the dc-to-dc converter.
VDD
8
I
Connection to PD input port positive voltage.
VEE
4
I
Input side power return for the controller.
(1) I
INRUSH + 450 mA *
25 k
W
R
LIM
(1A)
DETAILED PIN DESCRIPTIONS
ILIM (Pin 1)
Inrush current limiting pin. This pin is used to program the inrush current of the device. By placing a resistor to VEE
from this pin, the inrush current into the load is limited via the following equation:
I
INRUSH + 450 mA *
25 k
W
R
LIM
(1A)
CLASS (Pin 2)
Classification pin. The PD can be optionally classified by adding a resistor from this pin to ground. The resistor specific
to each class is given in Table 1: PoE Classification Resistance Values.
DET (Pin3)
Detection pin. This pin is used to set up the detection resistance during PD detection. By tying a resistor, RDET, from
this pin to VDD, the user sets the detection resistance. It should be noted that the device itself looks like approximately
1 M
of resistance in parallel with RDET.
VEE (Pin 4)
Negative supply to the device.
RET (Pin 5)
Negative supply to the load. This pin is the drain side of a FET between the RET pin and the VEE pin, providing hot
swap capabilities to the load. When the FET is switched on, there is approximately 300 m
between this pin and VEE.
EN_DC (Pin 6)
Enable pin for the load. This pin is intended to be used with a dc-to-dc coverter with a soft start capacitor. When power
is not available to the dc-to-dc converter, this pin sinks 80
A and holds off the soft-start capacitor on the dc-to-dc
converter. Once the voltage across the load is within 1.5 V of its final value, the EN_DC pin stops drawing current
and becomes high impedance, allowing the dc-to-dc converter to soft start normally.
VDD (Pin 8)
Positive supply to the device.
(1)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS2370DG4 | 功能描述:热插拔功率分布 IEEE 802.3af Pwr Ifc Switch For PoE PD’s RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS2370DR | 功能描述:热插拔功率分布 IEEE 802.3af Pwr Ifc Switch For PoE PD’s RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS2370DRG4 | 功能描述:热插拔功率分布 IEEE 802.3af Pwr Ifc Switch For PoE PD’s RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS2370EVM | 制造商:Texas Instruments 功能描述:TPS2370EVM - Bulk |
| TPS2370PW | 功能描述:热插拔功率分布 IEEE 802.3af Pwr Ifc Switch For PoE PD’s RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
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