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參數(shù)資料
| 型號： | OPA548F |
| 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): 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% |
| 中文描述： | 高電壓，大電流運算放大器 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 284K |
| 代理商： | OPA548F |
13
OPA548
be avoided with clamp diodes from the output terminal to
the power supplies as shown in Figure 14. Schottky
rectifier diodes with a 5A or greater continuous rating are
recommended.
VOLTAGE SOURCE APPLICATION
Figure 15 illustrates how to use the OPA548 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.
PROGRAMMABLE POWER SUPPLY
A programmable source/sink power supply can easily be
built using the OPA548. Both the output voltage and output
current are user-controlled. Figure 16 shows a circuit using
potentiometers to adjust the output voltage and current while
Figure 17 uses digital-to-analog converters. An LED tied to
the E/S pin through a logic gate indicates if the OPA548 is
in thermal shutdown.
FIGURE 13. Output Disable and Thermal Shutdown Status with Dual Supplies.
FIGURE 12. Output Disable and Thermal Shutdown Status
with a Single Supply.
FIGURE 14. Motor Drive Circuit.
OPA548
V+
E/S
Open Drain
(Output Disable)
HCT
(Thermal Status
Shutdown)
V–
OPA548
V+
E/S
NOTE: (1) Optional—may be required to limit leakage
current of optocoupler at high temperatures.
V–
(1)
6
1
2
4N38
Optocoupler
5
4
HCT or TTL In
5V
6
2
1
4N38
Optocoupler
5
4
Zetex
ZVN3310
TTL Out
7.5k
1W
5V
G = – R
1
R
2
10
(Carbon)
0.01μF
R
2
20k
R
1
5k
OPA548
V–
V+
V
IN
Motor
D
1
D
2
D
1
, D
2
: Motorola MUR410.
相關PDF資料 |
PDF描述 |
|---|---|
| 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 |
| OPA552 | High-Voltage, High-Current OPERATIONAL AMPLIFIERS |
| OPA552FA | High-Voltage, High-Current OPERATIONAL AMPLIFIERS |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| OPA548F/500 | 功能描述:運算放大器 - 運放 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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| OPA548F/500G3 | 功能描述:運算放大器 - 運放 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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| OPA548FKTWT | 功能描述:運算放大器 - 運放 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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| OPA548FKTWT | 制造商:Texas Instruments 功能描述:IC OP AMP SINGLE SMD |
| OPA548FKTWTG3 | 功能描述:運算放大器 - 運放 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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
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