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LTC4089-5

Notas de Diseño

• Descargar
  Universal Li-Ion Battery Charger Operates from USB and 6V to 36V Input in Just 2cm2 &mdash DN395
  PDF, 101 Kb, Archivo publicado: jul 19, 2006
  Extracto del documento

  advertisement Universal Li-Ion Battery Charger Operates from USB and
  6V to 36V Input in Just 2cm2 – Design Note 395
  Liu Yang
  3mm × 6mm DFN package. The LTC4089’s buck regulator output voltage tracks the battery voltage to within
  300mV. This Bat-TrackTM feature minimizes overall power
  dissipation. The LTC4089-5 has a п¬Ѓxed 5V at OUT when
  power is applied at HVIN. When power is supplied from
  the USB port, the power manager maximizes the available
  power to the system load; up to the full USB available
  power of 2.5W. It automatically adjusts the Li-Ion battery
  charge current with respect to the system load current
  to maintain the total input current compliance within the
  USB limits. The total solution size is less than 2cm2 with
  all components on one side of the PCB. Introduction
  There are a number of advantages to offering USB and
  high input voltage power and battery-charging capability in handheld devices such as GPS navigators, PDAs,
  digital still cameras, photoviewers and MP3 players. For
  instance, charging and operation from USB offers the
  obvious convenience of not requiring a travel adapter. High
  voltage sources, such as Firewire and 12V to 24V adapters
  are even better, since they provide faster charging than
  USB and allow charging in more places, such as in the car.
  Nevertheless, there is an important design consideration …

Artículos

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  Integrated High Voltage Switching Charger/PowerPath Controller Minimizes Power Dissipation and Fits into 2cm² &mdash LT Journal
  PDF, 560 Kb, Archivo publicado: nov 22, 2006
  Extracto del documento

  DESIGN FEATURES L Integrated High Voltage Switching
  Charger/PowerPath Controller
  Minimizes Power Dissipation and
  Fits into 2cm2 
  by Tage Bjorklund
  Introduction
  GPS navigators, PDAs, MP3 players
  and other handheld devices draw
  on an increasing array of power
  sources for recharging their batteries.
  These sources include USB (4.5V),
  low voltage AC adaptors (4.5V–5V),
  high voltage AC adaptors (12V–24V),
  Firewire and automotive batteries.
  USB has the advantage of convenience
  while the high voltage sources offer
  faster charging at home and in the car.
  One issue with high voltage sources
  is that the voltage difference between
  the high voltage source and the battery
  is large enough that a linear charger
  cannot handle the power dissipation,
  thus dictating the need for a switching regulator. …

Linea modelo

Clasificación del fabricante

• Power Management > PMIC & Multifunction > USB Power Manager (PowerPath, Battery Charger)

Otros nombres:

LTC4089EDJCTRPBF, LTC4089EDJC TRPBF