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LT3796 LT3796

Artículos

• Descargar
  Combined Voltage and Current Control Loops Simplify LED Drivers, High Capacity Battery/Supercap Chargers & MPPT* Solar Applications &mdash LT Journal
  PDF, 3.1 Mb, Archivo publicado: jul 20, 2012
  Extracto del documento

  July 2012 I N T H I S I S S U E pushbutton controller 10 15V, 2.5A monolithic buckboost with 95% efficiency
  and low noise 17 easy 2-supply current
  sharing 20 Volume 22 Number 2 Combined Voltage and Current
  Control Loops Simplify LED Drivers,
  High Capacity Battery/Supercap
  Chargers & MPPT* Solar Applications
  Xin (Shin) Qi
  * Maximum Power Point Tracking sub-1mm height 24V, 15A
  monolithic regulator 26 deliver 25A at 12V from
  inputs to 60V 28 The rapid expansion of constant-current/constant-voltage (CC-CV)
  applications, especially in LED lighting and high capacity battery
  and supercapacitor chargers challenges power supply designers to
  keep pace with the increasingly complicated interplay of current and
  voltage control loops. A switch-mode converter designed specifically
  for CC-CV offers a clear advantage,
  especially when the supply has limited
  power, or its power is allocated
  among several competing loads. The LTC4155 is a monolithic switching battery charger that efficiently delivers
  3.5A charge current in a compact PCB footprint. See page 13.
  Caption w w w. li n ea r.com Consider, for instance, the challenge of charging a
  supercapacitor in a minimum amount of time from
  a power-limited supply. To maintain constant input
  power, the controlled charging current must decrease …

• Descargar
  LED Controller with Dual Current Regulation Loops Detects Faulty LEDs, Provides 100:1 Analog Dimming &mdash LT Journal
  PDF, 216 Kb, Archivo publicado: enero 6, 2014
  Extracto del documento

  design features LED Controller with Dual Current Regulation Loops Detects
  Faulty LEDs, Provides 100:1 Analog Dimming
  Xin (Shin) Qi The LT3796-1 is a switching controller designed to
  regulate a constant current or constant voltage at the
  output—necessary requirements for driving LEDs. It uniquely
  features two independent current sense amplifiers, and its
  high side PMOS disconnect switch driver, which can be
  operated either in combination with the switching regulator
  using the PWM pin or independently using the TGEN pin.
  These features allow the LT3796-1
  to satisfy the needs of some specific
  LED applications. For instance, in high
  reliability lighting, the controller can be
  configured to drive two LED strings in
  parallel so that it is possible to detect a
  single faulty LED in either string using the
  other as a reference. Or, for applications VIN
  8V TO 20V requiring accurate analog dimming,
  the two current sense amplifiers can be
  scaled to regulate the LED current at two
  ranges, high and low, thereby extending the analog dimming capability of a
  high power LED driver to 100:1, a tenfold
  improvement over what is typically available using a single current control loop. …

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Clasificación del fabricante

• Power Management > Battery Management > Battery Charger IC > Switching Battery Chargers
• Power Management > LED Driver ICs > Step-Up (Boost) LED Drivers | Step-Down (Buck) LED Drivers | Buck-Boost LED Drivers | Multitopology LED Driver
• Power Management > Supercapacitor Chargers
• Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) Switching Regulators | Extended Temperature (H & MP) LED Drivers