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| 型號： | TPS40180RGER |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.05 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQCC24 |
| 封裝： | GREEN, PLASTIC, VQFN-24 |
| 文件頁數(shù)： | 13/52頁 |
| 文件大?。?/td> | 1291K |
| 代理商： | TPS40180RGER |
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www.ti.com
VSH
ILIM
V
R2
I
b + a
=
a
(16)
SLVS753B – FEBRUARY 2007 – REVISED NOVEMBER 2007
where (for Equation 8 through Equation 16)
COMP is the voltage on the COMP pin
V
RMP is the ramp amplitude, 500 mV
V
OUT is the output voltage of the converter
I
OUT is the dc output current of the converter
V
IN is the input voltage of the converter
V
VSH is the valley voltage of the ramp, 1.8V
I
PK is the peak current in the inductor
R
L is the DC resistance of the inductor
L is the inductance of the inductor
12.5 is the gain of the current sense amplifier network inside the device
N
ph is the number of phase that the master clock is set to, either 6 or 8
I
ILIM is the bias current out of the ILIM pin, 23.5A typical
The TPS40180 architecture inherently allows multiple modules to start simultaneously into a load without
problems with overcurrent tripping. The reason this is the case is the master device in a group of devices
configured as a multiphase power supply is the only device that retains overcurrent control. The slave devices do
not have the ability to initiate an overcurrent event but rely on the master to handle this function. For this reason,
when setting the overcurrent threshold for a multiple converter system, the above equations should be used to
set the threshold on a per-converter basis. For example, if four converters are being used to generate a supply
that has a 60A current limit, the current limit to use for calculating the resistors would be 15 A.
NOTE:
The above equations indicate that the overcurrent threshold is dependent on input
voltage. Consequently, as the input voltage increases, the overcurrent threshold also
rises.
20
Copyright 2007, Texas Instruments Incorporated
Product Folder Link(s): TPS40180
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| TPS40180RGERG4 | 功能描述:DC/DC 開關(guān)控制器 Single Ph Stackable Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TPS40180RGET | 功能描述:DC/DC 開關(guān)控制器 Single Ph Stackable Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TPS40180RGETG4 | 功能描述:DC/DC 開關(guān)控制器 Sgl Phase Stackable Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
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