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參數(shù)資料
| 型號： | PT6475 |
| 英文描述： | 1.5V 14A. 3.3-V Input Adjustable Step-Down ISR |
| 中文描述： | 1.5V的第14A條。 3.3 - V輸入可調(diào)降壓ISR的 |
| 文件頁數(shù)： | 7/10頁 |
| 文件大?。?/td> | 181K |
| 代理商： | PT6475 |
Application Notes
For technical support and more information, see inside back cover or visit www.ti.com
PT6460 & PT6470 Series
Adjusting the Output Voltage of the PT6460 &
PT6470 ISR Series
The output voltage of the PT6460 (5-V input) and the
PT6470 (3.3-V input) series of power modules may be
adjusted higher or lower than the pre-set voltage. The
adjustment method requires a single external resistor.
The value of the resistor can either be calculated using
the formulas given below, or simply selected from the
range of values given in Table 3-2. Table 3-1 gives the
allowable adjustment range for each model as V
a
(min)
and V
a
(max). Refer to Figure 3-1 for the placement of
the required resistor. Resistor R
1
adjusts the output voltage
up, and the resistor
(R
2
)
adjusts it down.
Adjust Up:
An increase in the output voltage is obtained
by adding a resistor R
2
, between
V
o
Adjust
(pin 12) and
GND
(pin 5).
Adjust Down:
and
+Vsense
(pin 11).
Add a resistor
(R
1
)
, between
V
o
Adjust
(pin 12)
Figure 3-1
The values of
(R
)
[adjust down], and R
[adjust up],
can be calculated using the following formulas. Refer to
Figure 3-1 for the placement of the required resistor;
either
(R
1
)
or R
2
as appropriate.
(R
1
)
=
R
o
(V
a
– 0.8)
V
o
– V
a
– R
s
k
R
2
=
0.8 R
o
V
a
– V
o
– R
s
k
Where:
V
o
V
a
R
o
= The resistance value from Table 3-1
R
s
= The series resistance from Table 3-1
= Original output voltage
= Adjusted output voltage
R
Adjust Up
C
560 μF
(Req'd)
+V
O
COM
COM
+V
IN
+
(R
)
Adj Down
PT6460/70
2
–
4
5
–
8
12
9
–
10
Vin
Vout
Vo(adj)
GND
1
Inhibit*
C
330 μF
(Optional)
+Vsense
+
11
Notes:
1. Use a 1 % (or better) tolerance resistor in either the
(R
1
)
or R
2
location. Place the resistor as close to the ISR as
possible.
2. Never connect capacitors from V
o
adj to either GND or
V
out
. Any capacitance added to the V
o
adjust pin will affect
the stability of the ISR.
3. If the remote sense feature is not being used, the adjust
resistor
(R
1
)
can also be connected to
V
out
, (pins 9–10)
instead of
+V
sense
.
4. The PT6472 may not be adjusted higher than the
nominal output voltage of 2.5 V. There is insufficient
input voltage to allow for any increase in output voltage.
Table 3-1
ISR OUTPUT VOLTAGE ADJUSTMENT RANGE AND FORMULA PARAMETERS
Series Pt. Nos.
5-V Bus:
PT6461
PT6462
3.3-V Bus:
N/A
PT6472
PT6463
PT6473
PT6464
PT6474
PT6465
PT6475
PT6466
PT6476
PT6467
PT6477
Vo (nom)
Va (min)
Va (max)
Ro (k
)
Rs (k
)
3.3 V
2.6 V
3.63 V
10.2
24.9
2.5 V
2.0 V
2.8 V *
10.7
24.9
2.0 V
1.66 V
2.32 V
10.0
24.9
1.8 V
1.52 V
2.1 V
10.2
24.9
1.5 V
1.31 V
1.82 V
9.76
24.9
1.2 V
1.1 V
1.52 V
10.0
24.9
1 V
0.95 V
1.32 V
10.2
24.9
* The PT6472 may not be adjusted higher than its nominal output voltage of 2.5 V See note 4
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PT6475A | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 1.5V 14A 3.3-V Inpt Adj Step-Down 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 |
| PT6475C | 功能描述:DC/DC轉(zhuǎn)換器 1.5V 14A 3.3-V Inpt Adj Step-Down ISR RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
| PT6475N | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 1.5V 14A 3.3-V Inpt Adj Step-Down 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 |
| PT6476 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1.2V 14A. 3.3-V Input Adjustable Step-Down ISR |
| PT6476A | 功能描述:REG 1.2V 14A 3.3VIN ADJ HORZ RoHS:否 類別:電源 - 板載 >> DC DC Converters 系列:PT6470 設(shè)計(jì)資源:VI-200, VI-J00 Design Guide, Appl Manual 標(biāo)準(zhǔn)包裝:1 系列:* 類型:隔離 輸出數(shù):1 電壓 - 輸入（最?。?55V 電壓 - 輸入（最大）:100V Voltage - Output 1:15V Voltage - Output 2:- Voltage - Output 3:- 電流 - 輸出（最大）:* 電源（瓦） - 制造商系列:200W 電壓 - 隔離:* 特點(diǎn):* 安裝類型:通孔 封裝/外殼:9-FinMod 尺寸/尺寸:4.60" L x 1.86" W x 0.79" H（116.8mm x 47.2mm x 20.1mm） 包裝:散裝 工作溫度:-55°C ~ 85°C 效率:* 電源（瓦特）- 最大:* |
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