RadioLocman.com Electronics ru
Advanced Search +
  

Datasheet Linear Technology LTC7820IUFD#TRPBF

ManufacturerLinear Technology
SeriesLTC7820
Part NumberLTC7820IUFD#TRPBF

Fixed Ratio High Power Inductorless (Charge Pump) DC/DC Controller

Datasheets

  • Download » Datasheet, PDF, 1.0 Mb, Revision: C, File uploaded 01-12-2018
    LTC7820 - Fixed Ratio High Power Inductorless (Charge Pump) DC/DC Controller
    Docket ↓
    LTC7820
    Fixed Ratio High Power
    Inductorless (Charge Pump)
    DC/DC Controller
    DESCRIPTION FEATURES Low Profile, High Power Density, Capable of 500W+
    nn Soft Switching: 99% Peak Efficiency and Low EMI
    nn V Max for Voltage Divider (2:1): 72V
    IN
    nn V Max for Voltage Doubler (1:2)/Inverter (1:1): 36V
    IN
    nn Wide Bias V
    CC Range: 6V to 72V
    nn Soft Startup into Steady State Operation
    nn 6.5V to 40V EXTV
    CC Input for Improved Efficiency
    nn Input Current Sensing and Overcurrent Protection
    nn Wide Operating Frequency Range: 100kHz to 1MHz
    nn Output Short-Circuit/OV/UV Protections with
    Programmable Timer and Retry
    nn Thermally Enhanced 28-Pin 4mm × 5mm QFN Package
    nn APPLICATIONS The LTC®7820 is a fixed ratio high voltage high power
    switched capacitor/charge pump controller. The device
    includes four N-channel MOSFET gate drivers to drive ...

Prices

Packaging

Package4x5 QFN-28
Package CodeUFD
Package Index05-08-1712

Parametrics

Demo BoardsDC2543A
Design ToolsLTspice Model
Export Controlno
Frequency1000 kHz
FunctionFixed Ratio High Power DC/DC: Divider, Doubler or Inverter
Ishutdown60 A
Isupply1.5 mA
Number of Outputs1
Operating Temperature Range-40 to 85 °C
Output Current20 A
Output Voltage-12V, 12V, 24V, 48V or higher, up to 500W+
Vin Max72 V
Vin Min6 V

Eco Plan

RoHSCompliant

Design Notes

  • Download » Design Notes - DN1043, PDF, 360 Kb, 06-08-2017
    High Efficiency, High Density, Switched Capacitor Converter Suitable for High Power Applications
    Docket ↓
    High Efficiency, High Density, Switched Capacitor
    Converter Suitable for High Power Applications
    Design Note 1043
    By Jian Li, Jeff Zhang, Ya Liu, and Marvin Macairan
    Introduction
    The power density of a DC/DC converter is generally
    limited by bulky magnetic components, especially in
    applications where the input and output voltages are
    relatively high. One way to reduce inductor/transformer size is to increase the switching frequency,
    but this reduces converter efficiency because of
    switching-related losses.
    Another way to increase power density is to use an
    inductorless switched capacitor converter (charge
    pump) topology. Charge pumps can increase power
    density as much as 10X over a conventional converter
    without sacrificing efficiency. Instead of an inductor,
    a “flying capacitor” is used to store and transfer the
    energy from input to output. Despite the advantages
    of a charge pump design, switched capacitor converters have been limited to low power applications, due to the challenges presented in start-up, protection,
    gate drive and regulation.
    The LTC7820 is a fixed ratio, high voltage, high power
    switched capacitor controller that yields small and
    cost effective solutions for high power, nonisolated ...
  • Download » Design Notes - DN571, PDF, 525 Kb, 01-17-2018
    170W Voltage Doubler in 23mm × 16.5mm Package
    Docket ↓
    Design Note
    170W Voltage Doubler in 23mm × 16.5mm Package
    Ya Liu, Jian Li, Jeff Zhang and Brian Lin
    Introduction
    For high voltage input/output applications, inductorless,
    switched capacitor converters (charge pumps) significantly
    improve efficiency and reduce solution size over
    conventional inductor-based buck or boost topologies.
    By using a charge pump instead of an inductor, a “flying
    capacitor” is used to store and transfer the energy from
    input to output. The energy density of capacitors is much
    higher than inductors, improving power density by a factor
    of 10 using a charge pump. However, charge pumps have
    traditionally been limited to low power applications, due
    to the challenges presented in start-up, protection, gate
    drive and regulation.
    The LTC ®7820 overcomes these problems, allowing high
    power density, high efficiency (to 99%) solutions. This
    fixed-ratio high voltage, high power switched capacitor controller includes four N-channel MOSFET gate drivers,
    for use with external power MOSFETs, to produce a voltage
    divider, doubler, or inverter: specifically, 2:1 step-down
    from inputs to 72V, 1:2 step-up from input voltages to
    36V, or a 1:1 inverter from inputs to 36V. Each power ...

Articles

  • Download » Articles - LT Journal, PDF, 625 Kb, 07-07-2017
    High Efficiency, High Density, Switched Capacitor Converter for High Power Applications
    Docket ↓
    design features High Efficiency, High Density, Switched Capacitor Converter
    for High Power Applications
    Jian Li, Jeff Zhang, Ya Liu, and Marvin Macairan The power density of a DC/DC converter is generally limited by bulky magnetic components,
    especially in applications where the input and output voltages are relatively high. Inductor/
    transformer size can be reduced by increasing the switching frequency, but this reduces
    converter efficiency because of switching-related losses. Better, eliminate the magnetics
    altogether with an inductorless switched capacitor converter (charge pump) topology.
    Charge pumps can increase power density as much as 10× over a conventional
    converter without sacrificing efficiency. Instead of an inductor, a “flying capacitor” stores
    and transfers the energy from input to output. Despite the advantages of charge pump
    designs, switched capacitor converters are traditionally limited to low power applications,
    due to the challenges presented in start-up, protection, gate drive and regulation.
    The LTC®7820 is a fixed ratio, high
    voltage, high power switched capacitor
    controller that yields small and cost-effective solutions for high power, nonisolated
    intermediate bus applications with fault
    protection. The LTC780’s features include: Low profile, high power density, capable
    of 500W+ Soft switching: 99% peak efficiency and
    low EMI VIN max for voltage divider (2:1): 72V Soft start-up into steady state operation VIN max for voltage doubler (1:2)/
    inverter (1:1): 36V Input current sensing and overcurrent
    protection Wide bias VCC range: 6V to 72V Integrated gate drivers Output short-circuit/OV/UV protection
    with programmable timer and retry Figure 1. A 48V to 24V/20A voltage divider with a power density of 4000W/in3
    10Ω ...

Moldel Line

Series: LTC7820 (4)

Manufacturer's Classification

  • Power Management > Inductorless (Charge Pump) DC/DC Converters > Unregulated Doubling/Inverting Charge Pumps | High Voltage Charge Pumps

Other Names:

LTC7820IUFDTRPBF, LTC7820IUFD TRPBF

Slices ↓
Radiolocman facebook Radiolocman twitter Radiolocman google plus