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In 1862, the British company Myers offered steam locomotive models in its catalogue for the first time. Later on, electrically driven types entered children bedrooms, starting and stopping in a quite rough, "unnatural" way. Nowadays, even whole families spend afternoons with the small, detailed coloured model railways, which are fully digital controlled. This allows behaviours extremely close to reality, in terms of realistic, "slow" acceleration and deceleration.

Thanks to miniaturized SMD components like Diotec's bridge rectifier MYS80, the superfast diode EGL1D and dual MOSFET MMBT7002DW, such digital drives can be built even on the smallest scale. The MYS80 measures just 3 mm x 3 mm and offers anyway an output current of up to 500 mA at maximum 80 Vrms input voltage. An ideal free-wheeling diode for the PWM controlled DC drive is the EGL1D with 1 A, 200 V and t_rr < 50 ns. Two MOSFETs in a single SOT-363 package allow to build a halfbridge at smallest board space requirement. The MMBT7002DW offers 60 V of Drain to Source voltage, a peak drain current of 800 mA, maximum R_DSon of 7.5 Ohm and allow for control by digital/logic level drivers.

One way to make the battery system efficient is minimizing the energy usage while the system is runing or is in standby-mode. This can be realized by limiting the current drawn by the system from the battery. Thanks to Diotec's new LDO Voltage regulators LDI8119EN and LDI8233EN with Enable-function it is possible to switch-off the system, thus the input current will be limited usually up to 1.0 µA.

This simple solution will boost the efficiency of the battery system and prolong battery life. Due to the shutdown current of 0.4 µA - 1.0 µA the LDI8119EN and LDI8233EN are suitable in all battery management applications. Please refer to our Application Note for more detailed information.

The BAV99 is a widely used small signal device in dual diode configuration. Its two diodes in series can be used for any kind of signal processing, and two parts can even form a bridge for high speed full wave rectifying. As different as the applications are the requirements on such device: High volume consumer devices require only low voltage levels, but especially low BOM costs. Industrial applications need higher power and voltage ratings, e. g. at 24 V industrial control units. Battery powered electronics must be operated with lowest possible leakage currents to allow for long stand-by times. In addition, parts might need full AEC-Q101 qualification, in case of automotive use. 

Like choosing your favourite meal from a menu card, Diotec offers the BAV99 series from now on in different varieties, perfectly matching your particular needs:

* The BAV99-C in commercial grade, rather cost attractive and offering 70 V / 2.5 µA / 225 mW
* The industrial grade BAV99, having 85 V / 1 µA / 350 mW
* The AEC-Q101 qualified BAV99-AQ, again with 85 V / 1 µA / 350 mW
* The "high end" voltage version BAV99L, with 100 V / 1 µA / 350 mW
* The "low leakage" varieties BAV199 and BAV199-AQ, offering 85 V / 5 nA / 350 mW

Any wishes still open? This is just the beginning of further product series offering different parameters but also gradings, from commercial via industrial to AEC-Q101 qualified. We will keep you informed!

We have added a comprehensive disclaimer to each of our data sheets, like almost every manufacturer is nowadays doing.

It clearly mentions the types of applications where special care and clarification is required, and provides even more security and support to customers when choosing our parts. Check it out on the example of UGB8JT.