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參數(shù)資料
| 型號(hào)： | PT6932C |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 6 A SWITCHING REGULATOR, 725 kHz SWITCHING FREQ-MAX, SMA23 |
| 封裝： | ROHS COMPLIANT, SMD-23 |
| 文件頁(yè)數(shù)： | 3/8頁(yè) |
| 文件大?。?/td> | 180K |
| 代理商： | PT6932C |
Application Notes
For technical support and more information, see inside back cover or visit www.ti.com
PT6920/PT6930 Series
Adjusting the Output Voltage of the PT6920 and
PT6930 Dual Output Voltage ISRs
Each output voltage from the PT6920 and PT6930 series
of ISRs can be independantly adjusted higher or lower than
the factory trimmed pre-set voltage. Vo1 or Vo2 may each
be adjusted either up or down using a single external resis-
tor 2. Table 1 gives the adjustment range for both Vo1 and
Vo2 for each model in the series as Va(min) and Va(max).
Note that Vo2 must always be lower than Vo1 3.
Vo1 Adjust Up:
To increase the output, add a resistor R4
between pin 16 (V1 Adjust) and pins 7-11 (GND) 2.
Vo1 Adjust Down: Add a resistor (R3), between pin 16
(Vo1 Adjust) and pin 1 (Vo1 Sense) 2.
Vo2 Adjust Up:
Add a resistor R2 between pin 23
(Vo2 Adjust) and pins 7-11 (GND) 2.
Vo2 Adjust Down: Add a resistor (R1) between pin 23
(Vo2 Adjust) and pin 22 (Vo2 Sense) 2.
Refer to Figure 1 and Table 2 for both the placement and value of
the required resistor.
Notes:
1. The output voltages, Vo1 and Vo2, may be adjusted
independantly.
2. Use only a single 1% resistor in either the (R3) or R4
location to adjust Vo1, and in the (R1) or R2 location to
adjust Vo2. Place the resistor as close to the ISR as
possible.
3. Vo2 must always be at least 0.2V lower than Vo1.
4. Vo2 on both the PT6921 and PT6931 models may be
adjusted from 2.5V to 1.8V by simply connecting pin
22 (Vo2 Sense) to pin 23 (Vo2 Adjust). For more
details, consult the data sheet.
Table 1
PT6920 ADJUSTMENT RANGE AND FORMULA PARAMETERS
Output Bus
Vo1
Vo2
Series Pt #
Standard Case
PT6921/22
PT6921
PT6922
Excalibur Case
PT6931/32
PT6931
PT6932
PT6933
Adj. Resistor
(R3)/R4
(R1)/R2
Vo(nom)
3.3V
2.5V
1.5V
1.8V
Va(min)
2.3V
1.8V
1.2V
Va(max)
3.6V
3.0V
Vr
1.02V
1.0V
Ro (k
)
12.1
10.0
9.76
10.0
Rs (k
)
12.1
11.5
6.49
3.32
Figure 1
C
1
+
C
2
+
C
3
+
R4
(R3)
(R1)
R2
L
O
A
D
L
O
A
D
Adj Down
Adjust Up
Vin
COM
CO
V2
o
V1
o
PT6920
18 - 21
23
7 - 11
4,5,6
Vin
V2
out
GND
V o
2(adj)
V
1(sns)
1
16
Vo
1(adj)
12 - 15
V1
out
V
2(sns)
22
STBY
3
Adjust V1
out
Adjust V2
out
5. If Vo1 is increased above 3.3V, the minimum input voltage
to the ISR must also be increased. The minimum
required input voltage must be (Vo1 + 1.2)V or 4.5V,
whichever is greater. Do not exceed 5.5V
6. Never connect capacitors to either the Vo1 Adjust or Vo2
Adjust pins. Any capacitance added to these control pins
will affect the stability of the respective regulated output.
7. Adjusting either voltage (Vo1 or Vo2) may increase the
power dissipation in the regulator, and correspondingly
change the maximum current available at either output.
Consult the factory for application assistance.
The adjust up and adjust down resistor values can also be
calculated using the following formulas. Be sure to select
the correct formula parameter from Table 1 for the output
and model being adjusted.
(R1) or (R3)
=
Ro (Va – Vr) –R
s
k
Vo – Va
R2 or R4
=
Vr . Ro
– Rs
k
Va – Vo
Where:
Vo = Original output voltage, (Vo1 or Vo2)
Va = Adjusted output voltage
Vr = The reference voltage from Table 1
Ro = The resistance value from Table 1
Rs = The series resistance from Table 1
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相關(guān)代理商/技術(shù)參數(shù) |
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| PT6932N | 功能描述:DC/DC轉(zhuǎn)換器 25W 5V-Input Adj Dual Output 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: |
| PT6933 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:8-A 5V-Input Dual-Output Integrated Switching Regulator |
| PT6933A | 功能描述:DC/DC轉(zhuǎn)換器 25W 5V-Input Adj Dual Output 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: |
| PT6933C | 功能描述:DC/DC轉(zhuǎn)換器 25W 5V-Input Adj Dual Output 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: |
| PT6933N | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 25W 5V-Input Adj Dual Output 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 |
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