- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄69181 > PT7681A (TEXAS INSTRUMENTS INC) 30 A SWITCHING REGULATOR, 350 kHz SWITCHING FREQ-MAX, MSMA27 PDF資料下載
參數(shù)資料
| 型號： | PT7681A |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 30 A SWITCHING REGULATOR, 350 kHz SWITCHING FREQ-MAX, MSMA27 |
| 封裝： | ROHS COMPLIANT, METAL, SIP-27 |
| 文件頁數(shù)： | 12/12頁 |
| 文件大小： | 258K |
| 代理商： | PT7681A |
Application Notes
For technical support and more information, see inside back cover or visit www.ti.com
Using the Up/Down Margin Adjust Controls on the
PT7680 Series of 30-A Regulators
The PT7680 series of integrated switching regulator
modules incorporate MARGUP (pin 27) and MARGDN
(pin 6) control inputs. These controls allow the output
voltage set point to be momentarily adjusted 1, either
up or down, by a nominal 5%. The adjustment is in-
dependent of the VID control inputs and provides a
convenient method for dynamically testing the load
circuit’s power supply voltage over its operating margin
or range. The 5% adjustment is made by driving the
appropriate margin control input to the ground reference
at Sense(-) (pin 12) 2. An open drain, low-leakage (<1A),
logic-level MOSFET or p-channel JFET is recommended
for this purpose. Adjustments of less than 5% are also
possible using a series resistor (See Figure 5.1). The value
of the resistor can be selected from Table 5.1, or calcu-
lated using the following formulas.
Resistor Value Calculation
To reduce the margin adjustment to a value less than 5%,
series padding resistors are required (See RD and RU in
Figure 5.1). For the same amount of adjustment, the
resistor value calculated for RU and RD will be different.
RU
=
100 ( 6 – 1.2
. %)
k
.
. %
RD
=
4.99 (100 –
. %)
–94.81
k
.
. %
Where:
. % = The required margin adjust in percent
Notes:
1. The MARGUP and MARGDN controls were not
intended to be activated simultaneously. If they are
their affects on the output voltage may not completely
cancel, resulting in a slight shift in the output voltage
set point.
2. When possible use the Sense(-) (pin 12) as the ground
reference. This will produce a more accurate adjustment
of the output voltage at the load circuit terminals. GND
(pins 13-19) can be used if the Sense(-) pin is connected to
GND near the regulator.
C
out
+
C
in
+5V
PWR GND
Margin Dn
L
O
A
D
Q
2
Sense(–)
+V
OUT
Power GND
PT7681
43
1
26
20–25
12
513–19
7–11
V
OUT
V
IN
GND
SNS(+)
SNS(–)
STBY
VID3 - VID0
2
Q
1
6
27
MARG
DN
MARG
UP
+
Margin Up
0V
+V
o
R
D
R
U
0V
Figure 5.1; Margin Up/Down Application Schematic
Table 5.1; Margin Up/Down Adjust Resistor Values
PADDING RESISTOR VALUES
% Adjust
RU (Margin Up)
RD (Margin Dn)
5
0.0k
.
0.0k
.
(No resistor)
4
30.0k
.
24.9k
.
3
80.0k
.
66.5k
.
2
180.0k
.
150.0k
.
1
480.0k
.
399.0k
.
PT7680 Series
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PT7711C | 20 A SWITCHING REGULATOR, 400 kHz SWITCHING FREQ-MAX, MSMA27 |
| PT78NR107ST | 0.55 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, SMA3 |
| PT78NR152ST | SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, SMA3 |
| PT78NR110ST | 0.5 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, SMA3 |
| PT78NR114ST | 0.3 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, SMA3 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PT7681C | 功能描述:REG 2-3.5V 30A 5VIN PROG SMD RoHS:否 類別:電源 - 板載 >> DC DC Converters 系列:PT7680 設(shè)計資源:Maxi/Mini/Micro Design Guide, Appl Manual 標(biāo)準(zhǔn)包裝:1 系列:Maxi 類型:隔離 輸出數(shù):1 電壓 - 輸入（最?。?43V 電壓 - 輸入（最大）:110V Voltage - Output 1:15V Voltage - Output 2:- Voltage - Output 3:- 電流 - 輸出（最大）:* 電源（瓦） - 制造商系列:400W 電壓 - 隔離:* 特點(diǎn):* 安裝類型:通孔 封裝/外殼:模塊 尺寸/尺寸:4.60" L x 2.20" W x 0.54" H（116.8mm x 55.9mm x 13.7mm） 包裝:散裝 工作溫度:-55°C ~ 100°C 效率:* 電源（瓦特）- 最大:* |
| PT7681N | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 2V-3.5V 30A 5V Inp Programmable ISR RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| PT76D | 制造商:Pentair Technical Products / Hoffman 功能描述:Solid Top 700x600mm LtGray, fits 700x600mm, Steel |
| P-T76D | 制造商:PENTAIR TECNICAL PRODCUTS 功能描述:Solid Top 700x600mm |
| PT76S12 | 制造商:NIEC 制造商全稱:Nihon Inter Electronics Corporation 功能描述:DIODE MODULE 75A/1200V/1600V |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。