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This post will be about the Bps N99 Driver. A boring topic, I know, but it is rather interesting nonetheless. It is a type of power supply with 9.5 volt output and 2 amps of current consumption in an extremely lightweight housing which is mainly designed for notebook computers with 9 to 12 volt input voltage. This device can also be used in high-power applications like automotive battery chargers or industrial power supplies. The performance of this power supply is simply amazing considering its size and weight! The general principle of operation is based on the principle that when the load impedance (the load) increases, efficiency decreases; at high frequencies, it can reduce to zero. The 9.5 VDC output of this driver enables this device to operate in high-efficiency mode. When its load impedance is at a minimum value, the driver is operating in high-efficiency mode, which increases its efficiency further by increasing the current through the output transistors. The efficiency of the Bps N99 Driver is almost 100% at low input voltages, but decreases to around 90% at around 6 volts input voltage. The power delivered by this device varies between 15 watts and 18 watts depending on the input voltage. This means that for a system with an Intel Pentium 4 CPU running at 2. 5 GHz and consuming 100 W, the Bps N99 Driver would provide sufficient power for this system. When used in low-power applications, such as a notebook computer, the converter will consume up to 3 watts depending on the load impedance. To find out more about this device, I researched it. The model number of the driver was found on its metal housing: Bps N99 Driver. Then I searched with that information and came across: http://www.diodes.com/datasheets/bplxn991_t1r0_ds. pdf. The datasheet is written in Chinese by Diodes International Ltd, but it contains pretty much everything you need to know about the device. I will describe the main properties of this driver and provide some analysis of the datasheet. The datasheet confirms that this device has four modes of operation: flexible mode, high-efficiency mode, flexible mode with FET protection mode and high-efficiency mode with FET protection mode. We are primarily interested in low-power applications where this device is used as a small laptop power supply. Therefore, we will assume that the Bps N99 Driver has been switched to low-power constant current output (flexible) at all times unless specifically stated otherwise. To be able to compare the efficiency of this device with a traditional 12V DC power supply, we need to check the nominal voltage specifications. The Bps N99 Driver has a nominal voltage of 12 VDC, which is equivalent to 2 amps of current. This current can vary from 2 amps at approximately 10 volts input voltage up to approximately 3 amps at about 28 volts input voltage. Approximately 1 amp is needed for a Pentium 4 CPU running at 2. 5 GHz and consuming 100 watts, so the Bps N99 Driver will have enough power for this system. cfa1e77820
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