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FHP3130 Datasheet(PDF) 12 Page - Fairchild Semiconductor |
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FHP3130 Datasheet(HTML) 12 Page - Fairchild Semiconductor |
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12 / 23 page  © 2006 Fairchild Semiconductor Corporation 12 www.fairchildsemi.com FHP3130, FHP3230, FHP3430 Rev. 3.0.2 Application Information Driving Capacitive Loads The FREQUENCY RESPONSE VS. CL plot in Figure 7, illustrates the response of the FHP3230 Family. A small series resistance (Rs) at the output of the amplifier, illustrated in Figure 27, improves stability and settling performance. Rs values in the FREQUENCY RESPONSE VS. CL plot were chosen to achieve maximum bandwidth with less than 1dB of peaking. For maximum flatness, use a larger Rs. Figure 27. Typical Topology for Driving Capactive Loads Power Dissipation The maximum internal power dissipation allowed is directly related to the maximum junction temperature. If the maximum junction temperature exceeds 150°C for an extended time, device failure may occur. The FHP3130, FHP3230, and FHP3430 are short-circuit protected; however, this may not guarantee that the maximum junction temperature (+150°C) is not exceeded under all conditions. RMS Power Dissipation can be calculated using the following equation: Power Dissipation = I s * (Vs+ - Vs-) + (Vs+ - Vo(RMS)) * IOUT(RMS) where Is is the supply current, Vs+ is the positive supply pin voltage, Vs- is the negative supply pin voltage, Vo(RMS) is the RMS output voltage, and IOUT(RMS) is the RMS output current delivered to the load. Follow the maximum power derating curves shown in Figure 28 below to ensure proper operation. Figure 28. Maximum Power Derating Overdrive Recovery For an amplifier, an overdrive condition occurs when the output and/or input ranges are exceeded. The recovery time varies based on whether the input or output is overdriven and by how much the ranges are exceeded. The FHP3130/3230/3430 typically recovers in less than 50ns from an overdrive condition. Figure 29 shows the FHP3230 in an overdriven condition. Figure 29. Overdrive Recovery + - Rf Rg Rs CL RL + - Rf Rg Rs CL RL 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 0 Time (µs) -0.5 0.2 0.6 0.4 0.8 10 1.2 1.4 1.6 1.8 Output Input V s = 3V G = 5 R L = 2kΩ R f = 1kΩ 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 0 Time (µs) -0.5 0.2 0.6 0.4 0.8 10 1.2 1.4 1.6 1.8 Output Input V s = 3V G = 5 R L = 2kΩ R f = 1kΩ 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 -40 Ambient Temperature (°C) 0 -20 0 20 40 60 80 TSSOP-14 SOIC-14 SOIC-8 MSOP-8 SOT23-5 |
Número de pieza similar - FHP3130_06 |
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Descripción similar - FHP3130_06 |
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