Electronics ru
Advanced Search +

Datasheet Linear Technology LT1947

ManufacturerLinear Technology

Adjustable Output TFT-LCD Triple Switching Regulator


  • Download » Datasheet, PDF, 200 Kb, Revision: A
    LT1947 - Adjustable Output TFT-LCD Triple Switching Regulator
    Docket ↓
    Adjustable Output TFT-LCD
    Triple Switching Regulator
    U FEATURES DESCRIPTIO ■ The LT®1947 is a highly integrated multiple output DC/DC
    converter designed for use in TFT-LCD panels. The device
    contains two independent switching regulators. The main
    regulator has an adjustable output voltage with an internal
    1.1A switch that can generate a boosted voltage as high as
    30V. The second regulator’s output is also adjustable up
    to 30V and can deliver 10mA for positive bias. A simple
    level-shift charge pump off the main switch node generates the negative bias voltage. An external capacitor sets
    the delay time from AVDD’s final value to the rising edge at
    the VON pin. The 3MHz switching frequency allows the use
    of tiny low profile chip inductors and capacitors throughout, providing a low noise, low cost total solution with all
    components under 1.2mm in height. The device operates
    from an input range of 2.7V to 8V and is available in
    10-lead MSOP and thermally enhanced 10-lead MSOP
    packages. ■

    ■ ...





ArchitectureConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current ModeConstant Frequency Current Mode
Design ToolsLTspice ModelLTspice ModelLTspice ModelLTspice Model
Export Control, yes/nonononono
Frequency, kHz3000300030003000
Integrated Inductor, yes/nonononono
Ishutdown, A1111
Isupply, mA9.
Monolithic, yes/noyesyesyesyes
Number of Outputs3333
Operating Temperature Range, °C0 to 850 to 850 to 850 to 85
Polyphase, yes/nonononono
Switch Current, A1.
Switch Current 2, A0.
Synchronous, yes/nonononono
TopologyBoost, InvertingBoost, InvertingBoost, InvertingBoost, Inverting
Topology 1BoostBoostBoostBoost
Topology 2BoostBoostBoostBoost
Topology 3InvertingInvertingInvertingInverting
Vin Max, V8888
Vin Min, V2.
Vin Min Startup, V2.
Vout Max, V30303030
Vout Max 2, V36363636
Vout Max 3, V36363636
Vout Maximum36V36V36V36V
Vout Min, V1.
Vout Min 2, V1.
Vswitch Max, V30303030

Eco Plan


Moldel Line

Series: LT1947 (4)

Manufacturer's Classification

  • Power Management > Switching Regulator > LCD/CCD/OLED Bias
  • Power Management > Switching Regulator > Step-Up (Boost) Regulators > Internal Power Switch Boost

Slices ↓
Radiolocman facebook Radiolocman twitter Radiolocman google plus