Hello everyone!!!
I'm having trouble with the PN2907A model in LTspice. According to the datasheet, it has a max current of at least 500mA(can get 800mA pulsed) and a hfe = 50 at that point.
I'm trying to turn on 32 LEDs (wow!) using one of those devices, with a duty cycle of 1/8. I'm currently studying peak currents, so no duty is in place yet (worst case scenario).
The thing is that, for a base resistance of 192Ω, I should be getting the 0.96A in the collector using 19.2mA in the base using a Vcc = 5V connected to the emitter (Please see the attached .asc). Instead, I get around 144mA no matter how much I vary the base current Ib, which makes no sense.
Is the model wrong, or am I missing something?
Thanks!!!!!!
I'm having trouble with the PN2907A model in LTspice. According to the datasheet, it has a max current of at least 500mA(can get 800mA pulsed) and a hfe = 50 at that point.
I'm trying to turn on 32 LEDs (wow!) using one of those devices, with a duty cycle of 1/8. I'm currently studying peak currents, so no duty is in place yet (worst case scenario).
The thing is that, for a base resistance of 192Ω, I should be getting the 0.96A in the collector using 19.2mA in the base using a Vcc = 5V connected to the emitter (Please see the attached .asc). Instead, I get around 144mA no matter how much I vary the base current Ib, which makes no sense.
Is the model wrong, or am I missing something?
Thanks!!!!!!
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