Digital
  • protective case
  • selfie stand
  • Phone film
  • charger
  • Home
  • charger
  • Autotransformer regulator inverts 12V to produce ­12V Looking for DataSheets?
can a mobile phone in 2001 receive 6v while charging
  • 26 Jul, 2022
  • By Digital

Autotransformer regulator inverts 12V to produce ­12V Looking for DataSheets?

You can create a dc/dc regulator with an internal switching MOSFET that inverts 12V to produce an output of 200 mA at ­12V (Figure 1). The IC is a high-efficiency device whose low quiescent current (120 µA maximum) is the product of a CMOS process that limits the absolute-maximum input-to-output voltage to 21V. Thus, to avoid having 24V across its terminals, the IC must isolate itself from the inductor-flyback voltage. It can do so by driving either an external switch in a nonbootstrapped configuration or an internal switch in a flyback-transformer configuration.

Autotransformer T1, a center-tapped inductor with a 1-to-1 turns ratio, offers a design alternative. Terminal LX flies back to 1/2VOUTplus a diode drop, or approximately ­6V. The V+ terminal remains at 12V, yielding 18V maximum between V+ and LX–well within the 21V limit. Because IC1drives the gate of its internal MOSFET between the V+ and OUT voltages, you normally connect OUT to VOUTto ensure sufficient gate drive. (In a typical application, the chip inverts 5V to produce ­5V.) In this circuit, the 12V input provides adequate gate drive, so OUT connects to ground. (DI #2067)

Figure 1
Autotransformer T1limits the voltage across IC1, allowing the use of a high-efficiency chip in this inverting dc/dc regulator.

Autotransformer regulator inverts 12V to produce ­12V Looking for
DataSheets?

PREV

Film Review: EMERGENCY: Sharp College Buddy Movie Demands Viewer Attention [SXSW 2022]

NEXT

Long covid can make it hard to do your job. Here are options to stop that becoming a problem with your boss.

Category

  • protective case
  • selfie stand
  • Phone film
  • charger

Related Articles

  • Energy bills recharge the case for solar panels

    Energy bills recharge the case for solar panels

    27 Dec, 2022
  • RAC joins forces with Zap-Map to support electric drivers

    RAC joins forces with Zap-Map to support electric drivers

    26 Dec, 2022
  • Scots killer John Reid found hiding mobile phones in his jail cell TV

    Scots killer John Reid found hiding mobile phones in his jail cell TV

    25 Dec, 2022
  • California bans gas-powered lawn equipment and other ‘small off-road engines’ Guides

    California bans gas-powered lawn equipment and other ‘small off-road engines’ Guides

    24 Dec, 2022

Hot Articles

  • Guide for Hardware Shop Starters: Money Saving Edition

    Guide for Hardware Shop Starters: Money Saving Edition

    01 Jul, 2022
  • Zollabgabe erhöht sich bei offenen Zellfernsehern

    Zollabgabe erhöht sich bei offenen Zellfernsehern

    19 Aug, 2022
  • How To Save the Cost of Opening a Hardware Store?

    How To Save the Cost of Opening a Hardware Store?

    19 May, 2022
  • Les meilleures recettes pour cuisiner avec du cidre

    Les meilleures recettes pour cuisiner avec du cidre

    31 May, 2022

copyright@2022 mobilephoneshells.com

  • protective case
  • selfie stand
  • Phone film
  • charger