RN4607(TE85L,F) Discrete Semiconductor Products

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A transistor array is a chip composed of multiple transistors, which facilitate integrated circuit manufacturing. The TE85L, F series of transistor arrays, marketed by Toshiba and known as the RN4607, are specifically designed for self-biasing and pre-biased applications. This article will discuss the application areas and working principle of the RN4607.

Applications

The RN4607 series are designed for use in applications that require precision current driving capabilities. These transistors are well-suited to a variety of feedback linear and switching circuits, including those found in motor control and drive, audio and video systems, and communication electronics. The RN4607 is particularly suited for systems with stringent requirements for low distortion, wide frequency response, and high-precision current regulation.

The RN4607 features a matched transistor array that offers superior current regulation, typically up to ±1% over both temperature and supply voltage variations. This makes the RN4607 ideal for use in applications that need precise and stable output current in the presence of external variations in temperature and power supply conditions.

The RN4607 also features a built-in LED current limiter, enabling built-in thermal protection when used in LED applications. This makes the RN4607 well-suited for use in controlling the current of LED backlights in LCD monitors, TVs, and other electronic applications.

Working Principle

The RN4607 is a self-biasing and pre-biased transistor array, utilizing insulated gate bipolar transistors (IGBTs) to drive exact output current. Each of the four transistors has its own emitter, collector, and base terminals, allowing for individual control and optimization of each transistor.

The RN4607 uses a unique biasing network, which enables the transistors to operate in both self-biased and pre-biased modes. In self-biased mode, the transistors are configured in parallel, and the current is regulated by the internal bias network. In pre-biased mode, the bias network is bypassed, and the output current is regulated by an external voltage source. This allows for precise control of current and improved power efficiency.

The RN4607 also utilizes a temperature compensating circuit, which controls the bias voltage to ensure stable operation over a wide range of temperatures. This temperature compensation circuit effectively eliminates temperature drift errors, making it well-suited for use in high temperature environments.

The RN4607 also features protection circuits to further ensure accurate operation in extreme conditions. These protection circuits operate in the event of an over-current or over-temperature condition, automatically shutting down the transistors and protecting the circuit from damage. This makes the RN4607 an ideal choice for applications requiring robust protection in the face of extreme conditions.

Conclusion

The RN4607 series of transistor arrays is designed for use in self-biasing and pre-biased applications that require precise and stable current regulation. The RN4607 features a matched transistor array, temperature compensation circuit, and built-in protection circuits to ensure robust operation in extreme conditions. This makes the RN4607 an ideal choice for motor control and drive, audio and video systems, communication electronics, and LED backlight applications.

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