參數(shù)資料
型號(hào)： 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(yè)數(shù)： 9/13頁(yè)
文件大?。?/td> 175K
代理商： OPA547F
9
OPA547
ducting output transistor. Power dissipation can be mini-
mized by using the lowest possible power supply voltage
necessary to assure the required output voltage swing.
For resistive loads, the maximum power dissipation occurs
at a dc output voltage of one-half the power supply voltage.
Dissipation with ac signals is lower. Application Bulletin
AB-039 explains how to calculate or measure power dissi-
pation with unusual signals and loads.
HEAT SINKING
Most applications require a heat sink to assure that the
maximum junction temperature (150
°
C) is not exceeded. The
heat sink required depends on the power dissipated and on
ambient conditions. Consult Application Bulletin AB-038 for
information on determining heat sink requirements. The in-
ternal protection circuitry was designed to protect against
overload conditions. It does not activate until the junction
temperature reaches approximately 160
°
C and was not in-
tended to replace proper heat sinking. Continuously running
the OPA547 into thermal shutdown will degrade reliability.
The tab of the DDPAK surface-mount version should be
soldered to a circuit board copper area for good heat dissi-
pation. Figure 4 shows typical thermal resistance from
junction to ambient as a function of the copper area.
FIGURE 4. Thermal Resistance vs. Circuit Board Copper Area.
THERMAL RESISTANCE vs
CIRCUIT BOARD COPPER AREA
50
40
30
20
10
0
T
θ
J
0
1
2
3
4
5
Copper Area (inches
2
)
OPA547F
Surface Mount Package
1oz copper
Circuit Board Copper Area
OPA547
Surface Mount Package
FIGURE 3. Adjustable Current Limit.
31.6k
R
CL
0.01μF
(optional, for noisy
environments)
7
6
7
6
4.75V
G = 5000
R
CL
= 5000 (4.75V)
– 31.6k
LIM
OPA547 CURRENT LIMIT: 0 to 750mA
NOTE: (1) Resistors are nearest standard 1% values.
DESIRED
CURRENT LIMIT
0mA
100mA
375mA
500mA
750mA
RESISTOR
(1)
(R
CL
)
I
LIM
Open
205k
31.6k
15.8k
I
LIM
Shorted to V–
CURRENT DAC
(I
DAC
)
0μA
20μA
75μA
100μA
150μA
VOLTAGE DAC
(V
DAC
)
(V–) + 4.75V
(V–) + 4.12V
(V–) + 2.38V
(V–) + 1.59V
(V–) + 0.01V
RESISTOR METHOD
V–
V
O
31.6k
4.75V
G = 5000
I
DAC
= I
LIM
/5000
V
DAC
= (V–) + 4.75V – (31.6k
) (I
LIM
)/5000
DAC METHOD (Current or Voltage)
V–
V
O
D/A
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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