Description:The PA13 is a 15A, 90V power operational amplifier with low thermal resistance (1.1°C/W). Target applications include driving resistive, inductive and capacitive loads such as motors, magnetic deflection, transducers, and programmable power supplies. For optimum linearity, especially at low levels, the output stage is biased for Class A/B operation by using a thermistor compensated base emitter voltage multiplier circuit. The safe operating area (SOA) can be observed for all operating conditions by selecti
Apex recommends a 4-layer PCB with a solid ground plane, and thermal vias under the package to dissipate heat. A minimum of 2 oz copper thickness is recommended for the top and bottom layers. Additionally, a thermal pad on the bottom of the package should be connected to a heat sink or a thermal management system.
To ensure reliable operation over the full temperature range, Apex recommends following proper PCB design and layout guidelines, using a suitable heat sink, and ensuring good thermal conductivity between the device and the heat sink. Additionally, the device should be operated within the recommended voltage and current limits, and the input and output capacitors should be selected to meet the required ripple current and voltage ratings.
The PA13A can operate with PWM frequencies up to 100 kHz, but the duty cycle should be limited to 90% maximum to ensure reliable operation and prevent overheating. Additionally, the minimum pulse width should be at least 100 ns to ensure proper switching.
To protect the PA13A from EOS and ESD, Apex recommends using a suitable input protection circuit, such as a TVS diode or a zener diode, to clamp the input voltage to a safe level. Additionally, the device should be handled and stored in an ESD-safe environment, and proper ESD protection measures should be taken during assembly and testing.
Apex recommends using a 4-wire Kelvin connection for measuring the output voltage and current, and a high-frequency oscilloscope with a suitable probe to measure the output waveform. Additionally, a load bank or a resistive load should be used to test the device under various load conditions.
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PA13A Overview
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