Circuits & Schematics ON Semiconductor - 4

31. DPPs make nonvolatile microvolt DAC
    Stephen Woodward
    Circuits Measurement ON Semiconductor CAT5113
    The availability of a seemingly limitless variety of monolithic DAC chips makes it easy to implement most digital-to-analog-conversion applications with a single off-the-shelf device. Sometimes, an unusual set of requirements necessitates a ...
    Dec 21, 2020
32. P-channel power-MOSFET driver uses unity-gain op amp
    Circuits Analogue Design Power ON Semiconductor MC33072 PN200A BD135G BD136G
    P-channel MOSFETs can simplify designs when you use them as high-side switches on circuits with voltages exceeding 100 V dc. When driving a MOSFET, you must rapidly charge and discharge the input capacitance between its gate and its source to ...
    Nov 10, 2020

33. Enhanced Circuit Yields Versatile, Efficient Switch-Mode Solenoid/Relay Driver
    Stephen Woodward
    Circuits Power ON Semiconductor LM339
    In this Idea for Design, using a comparator-based switch-mode driver circuit of a solenoid improves efficiency by tailoring the drive to the pull-in versus hold-mode current requirements. Several years ago, Paul Rako, in collaboration with the ...
    Oct 25, 2020
34. Power-supply interrupter fights ESD-induced device latch-up
    Circuits Analogue Design Supply ON Semiconductor MOC211M BSS138
    EDN Under certain conditions, ESD events can damage digital circuits by causing latch-up. For example, when ESD triggers them, parasitic transistors normally formed as parts of a CMOS device can behave as an SCR (silicon-controlled rectifier). Once ...
    Oct 12, 2020
35. Test continuity with an LED
    Raju Baddi
    Circuits Measurement ON Semiconductor BC549
    You sometimes need to know whether a resistance exceeds a preset limit. The continuity tester in Figure 1 lets you determine that fact for resistances of 0.5 Ω to 10 kΩ. The heart of the circuit is the transistor pair comprising Q 1 and ...
    Jul 21, 2020
36. Low-dropout linear regulators double as voltage-supervisor circuits
    Circuits Supply ON Semiconductor NCP500
    William Lepkowski EDN Many low-dropout voltage regulators include an enable-input pin that can also serve as an inexpensive alternative to a voltage-supervisor IC. Although the enable pin normally serves as a means of shutting down the ...
    Jun 12, 2020
37. 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
38. 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
39. 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
40. 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

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