Microchip TC1015 Manual

Microchip Ikke kategoriseret TC1015

Læs gratis den danske manual til Microchip TC1015 (28 sider) i kategorien Ikke kategoriseret. Denne vejledning er vurderet som hjælpsom af 14 personer og har en gennemsnitlig bedømmelse på 4.8 stjerner ud af 7.5 anmeldelser. Har du et spørgsmål om Microchip TC1015, eller vil du spørge andre brugere om produktet?

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Analog and Interface Solutions
www.microchip.com/analog
Portable Power Conversion Design Guide
2Portable Power Conversion Design Guide
Design Guide
Introduction and Contents
DC/DC Conversion
Step-Down (Buck) Switch Mode Power Converters
Portable power conversion applications present unique and challenging design considerations. Innovative, small electronics
require solutions with small footprints. In order to maintain battery life, portable applications require both high conversion
efficiency and low standby power dissipation. Multi-cell battery packs may require step-down (buck) conversions and single
cell batteries often require step-up (boost) conversions to maintain consistent power levels while the batteries discharge.
Some products require constant voltage regulation for microcontrollers, sensors or RF signal processing; while some
circuits need constant current regulation for backlighting or battery charging. Microchip offers a broad array of solutions
which feature small package sizes, high-efficiency, low standby power, accuracy and versatility solutions to solve these
portable power conversion challenges.
Table of Contents
Step-Down (Buck) Switch Mode Power Converters . . . . . . . . . . . . . . . . . . . . . . . 2
Linear (Low Drop Out) Regulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Step-Up (Boost) Switch Mode Power Converters . . . . . . . . . . . . . . . . . . . . . . . 12
Backlighting Solutions with Switching Regulators . . . . . . . . . . . . . . . . . . . . . . 17
Backlighting Solutions with Charge Pump DC/DC Converters . . . . . . . . . . . . . . 19
Linear Battery Chargers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Programmable Battery Chargers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Application Notes and Demonstration Boards . . . . . . . . . . . . . . . . . . . . . . . . . 24
Step-Down (Buck) Switch Mode Power Converters
For wide input range voltage sources and high output current applications switch-mode power converters offer a significant
increase in efficiency compared to linear regulators. This results in longer battery run time in portable applications.
Step-down or buck converters are used to regulate an output voltage that is always lower than the source voltage. Using
inductors and capacitors for energy storage allows buck converters to commonly be more than 90% efficient, and under
some circumstances they can be more than 95% efficient.
Microchip offers a wide selection of buck converters and PWM controllers. Many of them are specifically designed to convert
power from NiMH, Ni-Cd, Li-Ion, Alkaline multi-cell or 12/24V SLA batteries. Converters integrate power MOSFET switches
used to commutate the supply current, while controllers rely on external power MOSFETs in diodes to switch the converter
current. Synchronous converters rely on two MOSFETs working together to control the current flow, while asynchronous
converters replace one MOSFET with a freewheeling power diode. Synchronous converters deliver higher efficiency for low
output voltages, especially less than 3.3V, while asynchronous converters work well for higher output voltages.

Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: TC1015

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