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參數(shù)資料
| 型號： | OPA551 |
| 英文描述： | High-Voltage. High-Current Operational Amplifiers |
| 中文描述： | 高電壓。大電流運算放大器 |
| 文件頁數(shù)： | 9/15頁 |
| 文件大?。?/td> | 210K |
| 代理商： | OPA551 |
9
OPA551, OPA552
APPLICATIONS INFORMATION
Figure 1 shows the OPA551 connected as a basic non-
inverting amplifier. The OPA551 can be used in virtually
any op amp configuration. OPA552 is designed for use in
configurations with gains of 5 or greater. Power supply
terminals should be bypassed with 0.1
μ
F capacitors, or
greater, near the power supply pins. Be sure that the capaci-
tors are appropriately rated for the power supply voltage
used. The OPA551 and OPA552 can supply output currents
up to 200mA with excellent performance.
FIGURE 1. Basic Circuit Connections.
CURRENT LIMIT
The OPA551 and OPA552 are designed with internal cur-
rent-limiting circuitry that limits the output current to ap-
proximately 380mA. The current limit varies with increasing
junction temperature as shown in the typical curve “Current
Limit vs Temperature.” This, in combination with the ther-
mal protection circuitry, provides protection from many
types of overload conditions including short circuit to ground.
THERMAL PROTECTION
The OPA551 and OPA552 have thermal shutdown circuitry
that protects the amplifier from damage caused by overload
conditions. The thermal protection circuitry disables the
output when the junction temperature reaches approximately
160
°
C, allowing the device to cool. When the junction
temperature cools to approximately 140
°
C, the output cir-
cuitry is automatically re-enabled.
The thermal shutdown function is not intended to replace
proper heat sinking. Activation of the thermal shutdown
circuitry is an indication of excessive power dissipation or
an inadequate heat sink. Continuously running the amplifier
into thermal shutdown can degrade reliability.
The Thermal Shutdown Indicator (“flag”) pin can be moni-
tored to determine if shutdown is occurring. During normal
operation, the current output from the flag pin is typically
50nA. During shutdown, the current output from the flag pin
increases to 120
μ
A (typical). This current output allows for
easy interfacing to external logic. See Figure 2 for two
examples implementing this function.
FIGURE 2. Thermal Shutdown Indicator.
G = 1+ R
2
R
1
Z
L
R
2
R
1
0.1
μ
F
10
μ
F
OPA551
V–
V+
+
+
V
IN
10
μ
F
0.1
μ
F
V
O
Flag
(optional)
Flag
80
μ
A to
160
μ
A
HCT
OPA551
Logic
Ground
V
OUT
+5V
27k
V
LOGIC
V
OUT
CMOS
OPA551
Logic
Ground
Interfacing with CMOS Logic
Interfacing with HCT Logic
47k
HP5082-2835
Interface to virtually any CMOS
logic gate by choosing resistor
value that provides a guaranteed
logic high voltage with the
minimum (80
μ
A) flag current. A
diode clamp to the logic supply
voltage assures that the CMOS
is not damaged by overdrive.
HCT logic has relatively well-
controlled logic level. A properly
chosen resistor value can
guarantee proper logic high level
throughout the full range of flag
output current.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OPA551/OPA552 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:OPA551. OPA552 - High-Voltage. High-Current OPERATIONAL AMPLIFIERS |
| OPA5516 | 制造商:KODENSHI 制造商全稱:KODENSHI KOREA CORP. 功能描述:Pure Green LED Chip |
| OPA551FA | 制造商:Texas Instruments 功能描述:Operational Amplifier, Single AMP, Bipolar, 7 Pin, Plastic, SIP |
| OPA551FA/500 | 功能描述:運算放大器 - 運放 High-Volt High-Crnt Oper Amplifier 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 |
| OPA551FA/500G3 | 功能描述:運算放大器 - 運放 High-Volt High-Crnt Oper Amplifier 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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