DATASHEET and Circuit Diagram

An LM1949 function modification as a switcher can be seen in the following circuit diagram. This injector drive controller has an excellent control of fuel injector drive circuitry in automotive applications system, according to the datasheet. LM1949 used to be applied in aplications such as throttle body injection, solenoid controls, DC motor drives, air and fluid valves.

The circuit only need two external resistors (Ra and Rb) to be added in order to modify this IC to be functioned as a switcher. Zener diode connection, the ammount of ripple on the hold current, zener voltage calculation, the power disipation of zener can also be seen in the datasheet.

Switching Injector Application Driver Circuit using LM1949 continued »

A unity gain multipole Butterworth filter circuit diagram with ripple less than 0.15dB in the human voice band is shown in the following picture. By using CMOS op amps, a voice signal recovery applications (radios, cellular phones, and voice pagers) can be properly recovered using a low power bandpass filter implementation matched to the voice spectrum.

The circuit uses TC1029 dual CMOS operational amplifier for low power applications such power management circuit or battery operated equipment.

Butterworth Filter Circuit Diagram for Voice Signal Applications Recovery continued »

An automotive relay can be differentiated from various type for its terminal design, current capacity, voltage rating, enclosure options, and the internal structure. FBR53HW is an automotive relay that cover a wide range of large current automotive applications including electric power steering, according to the datasheet. Yes, it is the 40A relays with the smallest size in the world that could be the next generation of automotive relays.

This type of relay has been made for replacing high current automotive application in which plug-in type relays are mainly used. In the depth of the article there are sections that explain The design concept for FBR53, The Features of FBR53-HW, Characteristic comparison between FBR53 and the FBR53-HW (in table detailed for the materials, contact, coil,etc), current carrying limit test, condenser load test, and resistance load test.

The Smallest 40A Relay Design for Automotive Applications and Datasheet continued »