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參數(shù)資料
| 型號： | OPA511AM |
| 英文描述： | High Current?High Power OPERATIONAL AMPLIFIER |
| 中文描述： | 高電流？高功率運(yùn)算放大器 |
| 文件頁數(shù)： | 6/6頁 |
| 文件大小： | 65K |
| 代理商： | OPA511AM |
OPA511
6
HEAT SINKING
Power amplifiers are rated by case temperature (not ambient
temperature). The maximum allowable power dissipation is
a function of the case temperature as shown in the power
derating curve. Load characteristics, signal conditions, and
power supply voltage determine the power dissipated by the
amplifier. The case temperature will be determined by the
heat sinking conditions. Sufficient heat sinking must be
provided to keep the case temperature within safe bounds
given the power dissipated and ambient temperature. See
Application Note AN-83 for further details.
SAFE OPERATING AREA (SOA)
The safe area plot provides a comprehensive summary of the
power handling limitations of a power amplifier, including
maximum current, voltage and power as well as the second-
ary breakdown region (see Figure 1). It shows the allowable
output current as a function of the power supply to output
voltage differential (voltage across the conducting power
device). See Application Note AN-123 for details on SOA.
FIGURE 1. Safe Operating Area.
5 6 7 8 910
15
20
30
40 50 6070
6
5
4
3
2
1
0.8
0.6
0.4
0.3
0.2
O
Voltage Across Output Transistor (V)
Current Limited
T
C
= +85°C
C
=+25°C
ThermaT
t=5m
t=1m
Secondary Breakdown
APPLICATIONS INFORMATION
POWER SUPPLIES
Specifications for the OPA511 are based on a nominal
operating voltage
±
28V. A single power supply or unbal-
anced supplies may be used so long as the maximum total
operating voltage (total of +V
S
and –V
S
) is not greater than
68V.
CURRENT LIMITS
Current limit resistors must be provided for proper opera-
tion. Independent positive and negative current limit values
may be selected by choice of R
CL+
and R
CL–
, respectively.
Resistor values are calculated by:
R
CL
= 0.65/I
LIM
(amps) –0.01
This is the nominal current limit value at room temperature.
The maximum output current decreases at high temperature
as shown in the typical performance curve. Most wire-
wound resistors are satisfactory, but some highly inductive
types may cause loop stability problems. Be sure to evaluate
performance with the actual resistors to be used in produc-
tion.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OPA512 | 制造商:BB 制造商全稱:BB 功能描述:Very-High Current.High Power OPERATIONAL AMPLIFIER |
| OPA512BM | 功能描述:運(yùn)算放大器 - 運(yùn)放 Very Hi Current Hi Pwr Op Amp 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 |
| OPA512BM | 制造商:Texas Instruments 功能描述:Operational Amplifier (Op-Amp) IC |
| OPA512SM | 功能描述:運(yùn)算放大器 - 運(yùn)放 Very Hi Current Hi Pwr Op Amp 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 |
| OPA541 | 制造商:BB 制造商全稱:BB 功能描述:High Power Monolithic OPERATIONAL AMPLIFIER |
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