Circuits & Schematics ON Semiconductor - 5

41. Microcontroller drives H bridge to power a permanent-magnet dc motor
    Luca Bruno
    Circuits Analogue Design Supply ON Semiconductor NSS40200L NST489AMT1G
    A traditional method of driving a low- to medium-power permanent-magnet dc motor involves using four MOSFET or bipolar transistors in an H-bridge configuration. For example, in Figure 1, the motor connects between collector pairs C 1 and C 2 and C ...
    Jun 3, 2020
42. Circuit makes simple FSK modulator
    Shyam Tiwari
    Circuits Digital ON Semiconductor NL27WZ14
    The need for a compact telemetry system poses a challenge for designing a small, light, low-component-count system. Interfacing serial data from the microprocessor is also difficult because most low-cost RF transmitters do not accept dc levels at ...
    Apr 18, 2020

43. 20A/40V Integrated Power Module for DC Brushless Motors (BLDC)
    Rajkumar Sharma
    Circuits Power ON Semiconductor STK984-090A
    This project is based on STK984-090A from ON Semiconductor which is a fully-integrated inverter with current rating 20 A and supply voltage 40 V DC (Figure 1). It has been designed to drive the Brushless DC Motors (BLDC) and permanent magnet ...
    Apr 17, 2020
44. Line-powered driver lights up high-power LEDs
    Aaron Lager
    Circuits Supply Light ON Semiconductor NCP1200 MTD1N60E
    Using LEDs has gained popularity as a method of saving power for general-purpose lighting, but an efficient method for driving them has also become a necessity. For example, Lumileds' Luxeon devices create lighting effects or room lighting. ...
    Apr 1, 2020
45. DPP Adds Versatility to VFC
    Chuck Wojslaw
    Circuits Analogue Design Measurement ON Semiconductor CAT5113
    The basic VFC (voltage-to-frequency converter) in Figure 1 comprises an integrator (IC 1 ) and a Schmitt-trigger circuit (IC 2 ). The integrator converts the dc input voltage, V IN , to a linear voltage ramp, and the Schmitt trigger sets the limits ...
    Mar 6, 2020
46. JFET Follower Amplifier Cancels Distortion
    Dimitri Danyuk
    Circuits Analogue Design ON Semiconductor BC850 BC860
    Many improvements to the follower circuit have been proposed over the years. The White cathode follower doubles the output current and makes the transfer function more linear. [ 1 ] Adding a common-base amplifying stage (current follower) ...
    Dec 24, 2019
47. HB-LED flashing beacon repurposes switching regulator
    T A Babu
    Circuits Supply Light ON Semiconductor MC34063A
    This flasher/beacon circuit can be employed as a distress signal on highways, a direction pointer for parking lots, hospitals, and hotels, etc. The circuit uses a power LED, and provides more light than a typical incandescent lamp flasher. Use of a ...
    Nov 2, 2019
48. Simple circuit controls the rate of voltage change across a capacitor or another load
    Circuits Supply ON Semiconductor MMBT2222A MMBT2907A
    Fabien Dubois EDN The circuit in this Design Idea lets you set a well-controlled voltage rate of change, often expressed as the differential dV/dt (instantaneous rate of voltage change over time in volts per second). You can vary the sensitivity ...
    Aug 29, 2019
49. A circuit to use PIC peripheral outputs simultaneously
    Circuits Interfaces Microcontrollers Usage ON Semiconductor 2N7000 BSS138
    Soumitra Bhattacharjee EDN In PIC microcontrollers, the MSSP (master synchronous serial port) module uses multiplexed pins for the I 2 C and SPI peripherals. There is typically no issue using either of the two peripherals. But what if both ...
    May 20, 2019
50. Retriggerable monostable multivibrator quickly discharges power-supply capacitor
    Jordan Dimitrov
    Circuits Supply ON Semiconductor CD4538BC
    Universal power supplies must work from mains power lines ranging from 90 to 264 V ac at 50 or 60 Hz. Directly rectifying the input voltage charges the filter capacitor to 120 to 370 V dc. Such voltages present a serious threat to personnel who are ...
    Mar 20, 2019

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