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參數資料
| 型號： | PT6884C |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 5 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, SMA18 |
| 封裝： | ROHS COMPLIANT, SMD-18 |
| 文件頁數： | 7/10頁 |
| 文件大?。?/td> | 213K |
| 代理商： | PT6884C |
Application Notes
For technical support and more information, see inside back cover or visit www.ti.com
PT6880 Series
Adjusting the Output Voltage of the PT6880
5-A Excalibur Converter Series
The output voltage of the Power Trends PT6880 Excalibur
series of ISRs may be adjusted higher or lower than the
factory trimmed pre-set voltage with the addition of a
single external resistor 1. Table 3-1 gives the respective
allowable adjustment range for each model in the series as
Va (min) and Va (max).
Adjust Up:
An increase in the output voltage is obtained
by adding a resistor R2, between pin 1 (Vo Adjust) and
pins 6, 7 /11-14 (GND).
Adjust Down:
Add a resistor (R1), between pin 1 (Vo Ad-
just) and pins 15-17 (Vout).
Refer to Figure 3-1 and Table 3-2 for both the placement and
value of the required resistor, either (R1) or R2 as appropriate.
Notes:
1. Use only a single 1% resistor in either the (R1) or R2
location. Place the resistor as close to the ISR as possible.
2. Never connect capacitors from Vo adjust to either GND,
Vout, or the Remote Sense pin. Any capacitance added to
the Vo adjust pin will affect the stability of the ISR.
3. If the remote sense feature is being used, connecting the
resistor (R1) between pin 1 (Vo Adjust) and pin 18 (Remote
Sense) can benefit load regulation.
4. For output voltages above 10Vdc, the maximum output
current must be limited to 4Adc.
5. Adjustments to the output voltage may place additional
limits on the input voltage for the part. The revised limits
must comply with the following requirements.
Vin (min)
= (Vout + 3)V or 15V,
whichever is higher.
Vin (max)
whichever is less.
Figure 3-1
Table 3-1
PT6880 ADJUSTMENT AND FORMULA PARAMETERS
Series Pt #
PT6882
PT6881
PT6883
PT6884
PT6886
PT6885
Vo (nom)
2.5V
3.3V
5.0V
9.0V
12.0V
15.0V
Va (min)
1.8V
2.2V
3.0V
6.0V
9.0V
10.0V
Va (max)
4.3V
4.7V
6.5V
10.2V
13.6V
17.0V
Ro (k
)
4.99
4.22
2.49
2.0
Rs (k
)
2.49
4.99
12.7
C
in
+
C
out
+
(R1)
Adj Down
R2
Adjust
Up
Vo
COM
Vin
L
O
A
D
PT6880
15 – 17
1
6, 7,
11 – 14
8 – 10
Vin
V o
GND
Vo(adj)
STBY
4
Vsense
18
The values of (R1) [adjust down], and R2 [adjust up], can
also be calculated using the following formulas.
(R1)
=
Ro (Vo – 1.25) (Va – 1.25) – R
s k
1.25 (Vo – Va)
Ro (Vo – 1.25)
– Rs
k
R2
=
Va - Vo
Where:
Vo = Original output voltage
Va = Adjusted output voltage
Ro = The resistance value in Table 3-1
Rs = The series resistance from Table 3-1
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相關代理商/技術參數 |
參數描述 |
|---|---|
| PT6884N | 功能描述:開關變換器、穩(wěn)壓器與控制器 9Vout 5A 18-36V Inp CU Case Adj 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 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| PT6885 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:5-A, 15-36-V Input Integrated Switching Regulator |
| PT6885A | 功能描述:DC/DC轉換器 15Vout 4A 18-36V Inp CU Case Adj ISR RoHS:否 制造商:Murata 產品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標稱）: 輸出端數量: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）: 安裝風格:SMD/SMT 封裝 / 箱體尺寸: |
| PT6885C | 功能描述:DC/DC轉換器 15Vout 4A 18-36V Inp CU Case Adj ISR RoHS:否 制造商:Murata 產品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標稱）: 輸出端數量: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）: 安裝風格:SMD/SMT 封裝 / 箱體尺寸: |
| PT6885N | 功能描述:DC/DC轉換器 15Vout 4A 18-36V Inp CU Case Adj ISR RoHS:否 制造商:Murata 產品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標稱）: 輸出端數量: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）: 安裝風格:SMD/SMT 封裝 / 箱體尺寸: |
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