mobile | classic
Dataweek Electronics & Communications Technology Magazine

Follow us on:
Follow us on Facebook Share via Twitter Share via LinkedIn


Electronics Buyers' Guide

Electronics Manufacturing & Production Handbook 2019


Switched capacitor voltage converters and inverters
5 November 2003, Power Electronics / Power Management

Analog Devices' ADM660/ADM8660 are high current CMOS switched capacitor voltage converter ICs and the ADM8828/ADM8829 are switched capacitor voltage inverter ICs with shutdown.

The ADM660/ADM8660 invert the input voltage, producing VOUT = -VIN. The inverting scheme is ideal for generating a negative rail in a single-supply system. Only two small external capacitors are needed for the charge pump. Output currents up to 50 mA with greater than 90% efficiency are achievable. A frequency control (FC) input pin is used to select either 25 kHz or 120 kHz charge pump operation, optimising the capacitor sizes.

For applications that demand a higher voltage, the ADM660 can be used to double the input voltage, VOUT = 2 X VIN. Output voltages of 14 V maximum are attainable. In shutdown mode, the ADM660/ADM8660 consume 300 nA of current.

The ADM8828/ADM8829 are charge pump voltage inverters that generate a negative supply from a positive input. Input voltages ranging from +1,5 V to +5,5 V can be inverted into a -1,5 V to -5,5 V output supply. This inverting scheme is ideal for generating a negative rail in single-power supply systems. Only two small external capacitors are needed. Output currents up to 25 mA with greater than 99% efficiency are achievable. The ADM8828 also features a low power shutdown (SHDN) pin that can be used to disable the device and reduce the quiescent current to 20 nA.

ADM660/ADM8660 key features: 100 mA output current; 2,2 µF or 10 µF capacitors; only 0,3 V drop at 30 mA load; 1,5 V to 7 V supply; 600 µA quiescent current; selectable charge pump frequency (25 kHz/120 kHz).

ADM8828/ADM8829 key features: 99% voltage conversion efficiency; 18 Ω output resistance; high output current; shutdown function; require only two 1 µF capacitors; 1,5 to 5,5 V input range; 600 mA quiescent current; 20 nA shutdown current (ADM8828).

Information from Bekithemba Electronic and Mechanical Distributor. For more information contact 012 543 1451.

  Share on Facebook Share via Twitter Share via LinkedIn    

Further reading:

  • Battery design trends for IoT
    23 October 2019, Avnet South Africa, Power Electronics / Power Management
    Ultimately, the choice of battery for any application in the Internet of Things will depend on the power profile of the application, in combination with any environmental factors such as temperature.
  • Points to consider when running power supplies from portable generators
    23 October 2019, Accutronics, Power Electronics / Power Management
    Manufacturers of end systems should specify what class of generator their products should be used with, and should question what class was used if they do see equipment failures.
  • Developing opportunities around ‘hybrid’ renewable energy power plants
    23 October 2019, Forbatt SA, Power Electronics / Power Management
    If we let our imaginations run wild in the local context – and imagine the possibilities that come from having the cheapest energy in the world – the creative minds amongst us could have a field day.
  • High-voltage power supplies
    23 October 2019, Vepac Electronics, Power Electronics / Power Management
    The XP Emco range of high-voltage power supplies meets a wide range of high-performance demands. It includes a broad range of DC-DC converter modules with output voltages from 100 V to 10 kV in both proportional ...
  • 5 Watt AC-DC converter
    23 October 2019, Avnet South Africa, Power Electronics / Power Management
    Aimtec’s new AMEL5-277NZ is an AC-DC converter which has been designed to offer greater economies of scale due to greater production automation, leading to improved reliability and performance. The product ...
  • USB Type-C power controllers
    23 October 2019, Avnet South Africa, Power Electronics / Power Management
    Microchip announced two new solutions that simplify USB Type-C PD (Powered Device) designs to remove the traditional complexity and high costs associated with implementing USB Type-C in a range of applications.  ...
  • 0,6 A and 1 A point-of-load converters
    23 October 2019, Conical Technologies, Power Electronics / Power Management
    Traco Power announced a new addition to its TSR-WI range: the TSR-WI line is a set of non-isolated point-of-load (POL) converter series with an ultra-wide 8:1 input voltage range, which come in standard ...
  • 19-inch compatible power supply units
    23 October 2019, Actum Electronics, Power Electronics / Power Management
    nVent Schroff offers pluggable, switch-mode power supplies and a variety of open-frame power supplies for open standards. The linear regulator range caters for extremely sensitive electronics applications ...
  • Step-down power modules
    23 October 2019, Power Electronics / Power Management
    The MagI3C-VDMM (Variable Step Down Micro Module) power module family from Würth Elektronik is being supplemented by more powerful 1 A and 1,2 A versions. The input voltage range (from 2,5 to 5,5 V) covers ...
  • Support for wireless e-bike charging development
    23 October 2019, Power Electronics / Power Management
    Companies wishing to tap the comfort and maintenance-free advantages of wireless battery charging for the market of e-bikes and other small electrical vehicles, have the option of turning to Würth Elektronik ...
  • Starter kit for smart IPMs
    23 October 2019, Altron Arrow, Power Electronics / Power Management
    The EVAL-IMM101T starter kit is designed to give an easy-to-use motor drive solution based on Infineon Technologies’ iMOTION IMM101T smart IPM (intelligent power module). It provides a fully integrated ...
  • DC-DC converters in DIP-24 footprint
    23 October 2019, Conical Technologies, Power Electronics / Power Management
    The TEN 8WI DC-DC converter series from Traco Power is a family of 8 Watt DC-DC converter modules featuring an ultra-wide 4:1 input voltage range in a DIP-24 package with industry-standard footprint. ...

Technews Publishing (Pty) Ltd
1st Floor, Stabilitas House
265 Kent Ave, Randburg, 2194
South Africa
Publications by Technews
Dataweek Electronics & Communications Technology
Electronics Buyers’ Guide (EBG)

Hi-Tech Security Solutions
Hi-Tech Security Business Directory

Motion Control in Southern Africa
Motion Control Buyers’ Guide (MCBG)

South African Instrumentation & Control
South African Instrumentation & Control Buyers’ Guide (IBG)
Terms & conditions of use, including privacy policy
PAIA Manual


    Classic | Mobile

Copyright © Technews Publishing (Pty) Ltd. All rights reserved.