参数资料
| 型号： | EK71 |
| 厂商： | Apex Microtechnology |
| 文件页数： | 5/7页 |
| 文件大小： | 0K |
| 描述： | KIT EVALUATION FOR PA107 |
| 标准包装： | 1 |
| 系列： | Apex Precision Power® |
| 每 IC 通道数： | 1 - 单 |
| 放大器类型： | 功率 |
| 输出类型： | 差分 |
| 转换速率： | 3000 V/µs |
| 电流 - 输出 / 通道： | 1.5A |
| 工作温度： | -25°C ~ 100°C |
| 电流供应（主 IC）： | 30mA |
| 板类型： | 裸（未填充） |
| 已供物品： | 板，用于组装的元件 |
| 已用 IC / 零件： | PA107 |
| 其它名称： | 598-1795 |
PA107DP
PIN DESCRIPTIONS
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
Pin name
IN
+V AUX
-V AUX
GND
+V S
-V S
-V SP
OUT
+V SP
Description
Summing Junction Input for Inverting Operational Amplifier
+10V to +18V Supply for Input Circuits
-10V to -18V Supply for Input Circuits
Ground
Open Pin
Open Pin
Open Pin
+20V to +100V Supply for Gain and Gate Driver Circuits
-20V to -100V Supply for Gain and Gate Driver Circuits
-20V to -100V Supply for Output Source Follower
High Power Output of Amplifier
+20V to +100V Supply for Output Source Follower
3. GENERAL
Please read Application Note 1 “General Operating Considerations” which covers stability, power supplies, heat
sinking, mounting, current limit, SOA interpretation, and specification interpretation. Visit www.cirrus.com for design
tools that help automate tasks such as calculations for stability, internal power dissipation, current limit, heat sink
selection, complete Application Notes library, Technical Seminar Workbook and Evaluation Kits.
CAUTION
In order to achieve the highest speed with limited space short circuit protection and thermal protection were sacri-
ficed. Do not short the output. Note that if current limiting at 1.5 A could be used, and the output was shorted, internal
dissipation would be 150 W. This would still destroy the amplifier, albeit more slowly.
4. INTERNAL POWER DISSIPATION AND HEATSINK SELECTION
With the unique combination of high voltage and speed of the PA107, traditional formulas for heatsink selection
will falsely lower the apparent power handling capability of this amplifier. To predict operating temperatures use the
following procedure:
Find internal dissipation (PD) resulting from driving the load. Refer to Apex Applications Note 1, General Operating
Considerations, paragraph 7. Find total quiescent power (PD Q ) by multiplying 0.035 A by V SS (total supply voltage),
plus 0.021 times the total V AUX (+V AUX + |-V AUX |). Find output stage quiescent power (PD QOUT ) by multiplying 0.001 by
V SS .
Calculate a heatsink rating which will maintain the case at 85°C or lower.
R ?SA =
T C - T A
PD + PD Q
-0.1°C/W
Where:
T C = maximum case temperature allowed
T A = maximum ambient temperature encountered
R ?SA =
T J - T A - (PD + PD QOUT ) ? R ?JC
PD + PD Q
-0.1°C/W
Calculate a heatsink rating which will maintain output transistor junctions at 150°C or lower.
Where:
T J = maximum junction temperature allowed.
R ?JC = AC or DC thermal resistance from the specification table.
Use the larger heatsink of these two calculations.
PA107DPU
5
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