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參數(shù)資料
| 型號： | OPA547F |
| 元件分類： | DC/DC變換器 |
| 英文描述： | RxxP2xx Series - Econoline Unregulated DC-DC Converters; Input Voltage (Vdc): 12V; Output Voltage (Vdc): 15V; Power: 2W; EN 60950 certified, rated for 250VAC; UL-60950-1 / CSA C22.2 certified; 5.2kVDC Isolation for 1 Minute; Optional Continuous Short Circuit Protected; Wide Operating Temperature Range atfull 2 Watts Load, ?40??C to +85??C; Twin Chamber Transformer System; UL94V-0 Package Material; Efficiency to 80% |
| 中文描述： | 高電壓，大電流運(yùn)算放大器 |
| 文件頁數(shù)： | 12/13頁 |
| 文件大?。?/td> | 175K |
| 代理商： | OPA547F |
12
OPA547
VOLTAGE SOURCE APPLICATION
Figure 12 illustrates how to use the OPA547 to provide an
accurate voltage source with only three external resistors.
First, the current limit resistor, R
CL
, is chosen according to
the desired output current. The resulting voltage at the I
LIM
pin is constant and stable over temperature. This voltage,
V
CL
, is connected to the noninverting input of the op amp
and used as a voltage reference, thus eliminating the need for
an external reference. The feedback resistors are selected to
gain V
CL
to the desired output voltage level.
FIGURE 13. Resistor-Controlled Programmable Power Supply.
FIGURE 12. Voltage Source.
31.6k
R
CL
I
LIM
0.01μF
(Optional, for noisy
environments)
4.75V
I
O
=
5000 (4.75V)
31.6k
+ R
CL
V
O
= V
CL
(1 + R
2
/R
1
)
V–
V+
V
CL
V
CL
= (31.6k
+ 31.6k
)
Desired V
O
= 19V,
R
1
= 1k
and R
2
= 7k
G = 219
For Example:
4.75V
If I
LIM
= 375mA, R
CL
=
31.6k
R
2
R
1
Uses voltage developed at I
pin
as a moderately accurate reference
voltage.
PROGRAMMABLE POWER SUPPLY
A programmable power supply can easily be built using the
OPA547. Both the output voltage and output current are
user-controlled. Figure 13 shows a circuit using potentiom-
eters to adjust the output voltage and current while Figure 14
uses digital-to-analog converters. An LED tied to the E/S pin
through a logic gate indicates if the OPA547 is in thermal
shutdown.
G = 1 + 1k
9k
9k
1k
OPA547
+30V
+5V
+5V
0.8V to 2.5V
0V to 4.75V
Output
Adjust
V+
5
6
Thermal
Shutdown Status
NOTES: (1) For V
= 0V, V– = –1V.
(2) Optional: Improves noise
immunity.
(LED)
74HCT04
R
≥
250
E/S
V
O
= 0.8V to 25V
(1)
7
4
3
1
2
V–
I
LIM
14.7k
4.7k
Current
Limit
Adjust
1k
20k
0.01μF
(2)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| OPA547T | RxxP2xx Series - Econoline Unregulated DC-DC Converters; Input Voltage (Vdc): 12V; Output Voltage (Vdc): 15V; Power: 2W; EN 60950 certified, rated for 250VAC; UL-60950-1 / CSA C22.2 certified; 5.2kVDC Isolation for 1 Minute; Optional Continuous Short Circuit Protected; Wide Operating Temperature Range atfull 2 Watts Load, ?40??C to +85??C; Twin Chamber Transformer System; UL94V-0 Package Material; Efficiency to 80% |
| OPA548F | RxxP2xx Series - Econoline Unregulated DC-DC Converters; Input Voltage (Vdc): 12V; Output Voltage (Vdc): 3.3V; Power: 2W; EN 60950 certified, rated for 250VAC; UL-60950-1 / CSA C22.2 certified; 5.2kVDC Isolation for 1 Minute; Optional Continuous Short Circuit Protected; Wide Operating Temperature Range atfull 2 Watts Load, ?40??C to +85??C; Twin Chamber Transformer System; UL94V-0 Package Material; Efficiency to 80% |
| OPA548T | RxxP2xx Series - Econoline Unregulated DC-DC Converters; Input Voltage (Vdc): 12V; Output Voltage (Vdc): 3.3V; Power: 2W; EN 60950 certified, rated for 250VAC; UL-60950-1 / CSA C22.2 certified; 5.2kVDC Isolation for 1 Minute; Optional Continuous Short Circuit Protected; Wide Operating Temperature Range atfull 2 Watts Load, ?40??C to +85??C; Twin Chamber Transformer System; UL94V-0 Package Material; Efficiency to 80% |
| OPA549T | RxxPxx Series - Econoline Unregulated DC-DC Converters; Input Voltage (Vdc): 15V; Output Voltage (Vdc): 05V; Power: 1W; EN 60950 certified, rated for 250VAC; UL-60950-1 / CSA C22.2 certified; 5.2kVDC Isolation for 1 Minute; Optional Continuous Short Circuit Protected; 2 Chamber Transformer System; UL94V-0 Package Material; Efficiency to 80% |
| OPA551UA | High-Voltage, High-Current OPERATIONAL AMPLIFIERS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OPA547F/250 | 制造商:Texas Instruments 功能描述: |
| OPA547F/500 | 功能描述:運(yùn)算放大器 - 運(yùn)放 Hi-Vltg Hi-Current Exc Output Swing RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| OPA547F/500G3 | 功能描述:運(yùn)算放大器 - 運(yùn)放 Hi-Vltg Hi-Current Exc Output Swing RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| OPA547F500 | 制造商:BB 制造商全稱:BB 功能描述:High-Voltage, High-Current OPERATIONAL AMPLIFIER |
| OPA547FKTWT | 功能描述:運(yùn)算放大器 - 運(yùn)放 Hi-Vltg Hi-Current Exc Output Swing RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
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