PUMH14,115

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The PMH14,115 Array Pre-Biased Transistor is a 4-channel pre-biased transistor. This bipolar junction transistor (BJT) is designed to operate in the collecting (or emitter) current mode. It features a built-in current-limiting resistor that provides a bias current and reduce circuit complexity.

The device is constructed of a silicon epitaxial planar process and is available in both through-hole and surface mount packages. It can handle up to 220 Volts collector to emitter voltage and generates a 0.15A to 2A collector current. The collector-emitter saturation voltage is typically between 0.45 and 0.95V.

The PMH14,115 transistors are well-suited for use in high current, high voltage applications, such as motor control and drivers. The device is also ideal for applications that require a low standing current, such as battery chargers and DC-DC converters. Additionally, the combination of low voltage drop and minimal collector-emitter saturation make the PMH14,115 a great choice for use in linear applications, such as instrumentation amplifiers and isolated sensors.

The PMH14,115 Array Pre-Biased Transistor consists of four independent NPN or PNP transistors which are interconnected in a closed-loop arrangement. This interconnectivity enables the device to work in a current-limiting mode, which reduces the risk of thermal runaway due to an excessive current. The device also has integrated thermal-foldback protection that shuts down the device in the event of a thermal or voltage overload.

The device operates by allowing a controllable current to flow through the four interconnected transistors simultaneously. This current flow is regulated by the value of the current-limitation resistor and voltage applied to the base of the device. The base voltage variations create an emitter current that is proportional to the amount of voltage applied to the base. The current will increase as the voltage on the base increases and will decrease as the voltage on the base decreases. This is how the PMH14,115 regulates the collector current.

In the event that the current demand exceeds the design limits of the device, the device will automatically adjust the current-limiting resistor to reduce the current. This in turn reduces the risk of current overload, providing an additional layer of thermal protection. Additionally, if an excessive collector-emitter saturation occurs, this will activate the thermal-foldback circuit, which will shut down the device.

The PMH14,115 Array Pre-Biased Transistor offers an ideal solution for power management applications, such as motor control, battery chargers and DC-DC converters. The device’s built-in current-limiting resistor and integrated thermal protection provide extra assurance against current overloads and thermal runaways. Additionally, its low collector-emitter saturation and minimal voltage drop provide reliable performance for linear applications, such as instrumentation amplifiers and isolated sensors.

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