參數(shù)資料
型號： TPS40070PWPRG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 2 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16
封裝： GREEN, PLASTIC, HTSSOP-16
文件頁數(shù)： 6/28頁
文件大小： 655K
代理商： TPS40070PWPRG4
I
SCP(min) u
C
OUT
V
OUT
t
START
) ILOAD )
I
RIPPLE
2
(8)
R
ILIM +
100
R
DS(ON)max
I
SCP ) VILIM(ofst) ) 9
R
VDD
I
R
VDD
) 4.5 V
109
I
ILIM
(W)
(9)
I
R
VDD
+ fSW
Q
g(TOT) ) IDD (A)
(10)
I
SCP(max) +
1.09
I
ILIM(max)
R
ILIM * 0.09
R
VDD
I
R
VDD
* 0.045 V ) 75 mV
R
DS(ON)min
(A)
(11)
I
SCP(min) +
1.09
I
ILIM(min)
R
ILIM * 0.09
R
VDD
I
R
VDD
* 0.045 V ) 30 mV
R
DS(ON)max
(A)
(12)
C
ILIM(max) +
V
OUT
0.2
V
IN
R
ILIM
f
SW
(Farads)
(13)
SLUS582J – DECEMBER 2003 – REVISED APRIL 2009 .................................................................................................................................................. www.ti.com
The minimum short circuit limit setpoint (ISCP(min)) depends on tSTART, COUT, VOUT, ripple current in inductor
(IRIPPLE) and the load current at turn-on (ILOAD).
The short circuit limit programming resistor (RILIM) is calculated from:
where
I
ILIM is the current into the ILIM pin (110 A typical)
V
ILIM(ofst) is the offset voltage between SW and ILIM pins (-50 mV typical)
I
SCP is the short-circuit protection current
R
DS(ON)max is the drain-to-source resistance of the high-side MOSFET
R
VDD is the slew rate limit resistor if used
I
RVDD is the current through RVDD and can be calculated using Equation 10.
where
f
SW is the switching frequency
Q
g(TOT) is the combined total gate charge for both upper and lower MOSFETs (from MOSFET data sheet)
I
DD is the TPS4007x input current (3.5 mA maximum)
To find the range of the overcurrent values use the following equations.
The TPS40070/1 provides short circuit protection only. As such, it is recommended that the minimum short circuit
protection level be placed at least 20% above the maximum output current required from the converter. The
maximum output of the converter should be the steady state maximum output plus any transient specification
that may exist.
The ILIM capacitor maximum value can be found from:
Note that this is a recommended maximum value. If a smaller value can be used, it should be. For most
applications, consider using half the maximum value above.
14
Copyright 2003–2009, Texas Instruments Incorporated
Product Folder Link(s): TPS40070 TPS40071
相關PDF資料
PDF描述
TPS40071PWPR 2 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16
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相關代理商/技術參數(shù)
參數(shù)描述
TPS40071 制造商:TI 制造商全稱:Texas Instruments 功能描述:HIGH-EFFICIANCY MIDRANGE INPUT SYNCHRONOUS BUCK CONTROLLER WITH VOLTAGE FEED-FORWARD
TPS40071EVM-001 功能描述:EVAL MODULE FOR TPS40071-001 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:Predictive Gate Drive™ 產品培訓模塊:Obsolescence Mitigation Program 標準包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓撲結構:升壓 頻率 - 開關:3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969
TPS40071PWP 功能描述:DC/DC 開關控制器 Mid Rg In Sync Buck Cntrlr source/sink RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 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 安裝風格: 封裝 / 箱體:CPAK
TPS40071PWPG4 功能描述:DC/DC 開關控制器 Mid Rg In Sync Buck Cntrlr source/sink RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 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 安裝風格: 封裝 / 箱體:CPAK
TPS40071PWPR 功能描述:DC/DC 開關控制器 Mid Rg In Sync Buck Cntrlr source/sink RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 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 安裝風格: 封裝 / 箱體:CPAK
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