參數(shù)資料
型號: PT6477
英文描述: 200V Single N-Channel HEXFET Power MOSFET in a TO-220AB package; Similar to IRFB31N20D with Lead Free Packaging
中文描述: 1V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: PT6477
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
PT6477A 功能描述:REG 1.0V 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(最小):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:*
PT6477C 功能描述:REG 1.0V 14A 3.3VIN ADJ SMD 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:*
PT6477N 功能描述:REG 1.0V 14A 3.3VIN ADJ VERT 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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