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參數(shù)資料
| 型號： | PTN78060AAS-T |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 15-W, WIDE-INPUT ADJUSTABLE POSITIVE-TO-NEGATIVE VOLTAGE REGULATOR MODULE |
| 中文描述： | 15鎢，寬輸入可調(diào)節(jié)正到負電壓穩(wěn)壓器模塊 |
| 文件頁數(shù)： | 8/18頁 |
| 文件大?。?/td> | 1413K |
| 代理商： | PTN78060AAS-T |
www.ti.com
APPLICATION INFORMATION
Adjusting the Output Voltage of the PTN78060A Wide-Output Adjust Power Modules
General
R
=54.9k
SET
W
′
1
.
2
5
V
|
|
V
-3V
O
-5.62k
W
(1)
Input Voltage Considerations
GND
GND
PTN78060A
6
1,7
2
Adj
GND
4
+
+
C2
C1
R
S
E
T
0.05W
1%
C3
V
O
V
O
V
I
V
I
PTN78060A
SLTS245A–APRIL 2005–REVISED MAY 2005
A resistor must be connected directly between the
V
O
Adjust
control (pin 4) and the output
voltage
(pin 7) to set
the output voltage lower than –3 V. The adjustment range is from –15 V to –3 V. If pin 4 is left open, the output
voltage defaults to the highest value, –3 V.
Table 1
gives the standard resistor value for a number of common voltages, and with the actual output voltage
that the value produces. For other output voltages, the resistor value can either be calculated using the following
formula, or simply selected from the range of values given in
Table 2
.
Figure 18
shows the placement of the
required resistor.
The PTN78060A is a buck-boost switching regulator. In order that the output remains in regulation, the input
voltage must not exceed the output by a maximum differential voltage.
Another consideration is the pulse width modulation (PWM) range of the regulator's internal control circuit. For
stable operation, its operating duty cycle should not be lower than some minimum percentage. This defines the
maximum advisable ratio between the regulator's input and output voltage magnitudes.
For satisfactory performance, the maximum operating input voltage range must be equal to (32 – |V
O
|) volts.
As an example,
Table 1
gives the operating input voltage range for the common output bus voltages. In addition,
the Electrical Characteristics define the available output voltage adjust range for various input voltages.
Table 1. Standard Values of R
set
for Common Output
Voltages
V
R
V
Operating
V
I
Range
9 V to 17 V
(Required)
(Standard Value)
100
2 k
28.7 k
221 k
(Actual)
–15 V
–14.997 V
–12 V
–12.006 V
9 V to 20 V
–5 V
–5.000 V
9 V to 27 V
–3.3 V
–3.303 V
9 V to 28.7 V
(1)
A 0.05-W rated resistor may be used. The tolerance should be 1%, with a temperature stability of 100 ppm/°C (or
better). Place the resistor as close to the regulator as possible. Connect the resistor directly between pins 4 and 7
using dedicated PCB traces.
Never connect capacitors from
V
O
Adjust
to either
GND
or
V
O
. Any capacitance added to the
V
O
Adjust
pin affects the
stability of the regulator.
Figure 18. V
O
Adjust Resistor Placement
(2)
8
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| PTN78060AAZ | 功能描述:DC/DC轉(zhuǎn)換器 3A Wide-In Wide Neg Out Adj Module 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: |
| PTN78060AAZT | 功能描述:DC/DC轉(zhuǎn)換器 3A Wide-In Wide Neg Out Adj Module 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: |
| PTN78060AAZ-T | 制造商:TI 制造商全稱:Texas Instruments 功能描述:15-W, WIDE-INPUT ADJUSTABLE POSITIVE-TO-NEGATIVE VOLTAGE REGULATOR MODULE |
| PTN78060H | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3-A, WIDE-INPUT ADJUSTABLE SWITCHING REGULATOR |
| PTN78060HAH | 功能描述:DC/DC轉(zhuǎn)換器 3A Wide-In Wide Output Adj Module 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: |
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