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Производитель:Linear Technology
Серия:LT3999
Модель:LT3999EMSE#PBF

Драйвер трансформаторного двухтактного DC/DC преобразователя с программируемым коэффициентом заполнения импульсов

Datasheets

  • Скачать » Datasheet, PDF, 188 Кб
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    LT3999 Low Noise, 1A, 1MHz Push-Pull DC/DC Driver with Duty Cycle Control FEATURES n DESCRIPTION
    The LT®3999 is a monolithic, high voltage, high frequency DC/DC transformer driver providing isolated power in a small solution footprint. The LT3999 has two 1A current limited power switches that switch out of phase. The duty cycle is programmable to adjust the output voltage. The switching frequency is programmed up to 1MHz and can be synchronized to an external clock for more accurate placement of switcher harmonics. The input operating range is programmed with the precision undervoltage and overvoltage lockouts. The supply current is reduced to less than 1µA during shutdown. A user-defined RC time constant provides an adjustable soft-start capability by limiting the inrush current at start-up. The LT3999 is available in a 10-lead MSOP and 3mm Ч 3mm DFN package with exposed pad.
    L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Wide Input Operating Range: 2.7V to 36V Dual 1A Switches with Programmable Current Limit Programmable Switching Frequency: 50kHz to 1MHz Frequency Synchronization Up to 1MHz VIN Compensation Using Duty Cycle Control Low Noise Topology Programmable Input Over and Undervoltage Lockout Cross Conduction Prevention Circuitry Programmable Soft-Start Low Shutdown Current: <1µA 10-Lead MSOP and DFN Packages APPLICATIONS Low Noise Isolated Supplies Medical Instrument and Safety Distributed Power Multiple Output Supplies Positive-to-Negative Supplies Noise Immunity in Data Acquisition, RS232 and RS485 TYPICAL APPLICATION
    12V to 12V, 10W Low Noise Isolated DC/DC Converter
    VIN 12V 10µF 16V 255k 10k 15.8k RT ILIM/SS 28k 500kHz RBIAS 0.1µF 49.9k GND 16 VIN SYNC UVLO OVLO/DC RDC LT3999 SWB SWA 15.3µH VOUT 12V 0.8A 15 OUTPUT VOLTAGE (V) 14 13 12 11 10 9 8 10 11 12 13 14 15 16 INPUT VOLTAGE (V) 17 18 IOUT = 800mA IOUT = 200mA IOUT = 400mA LT3999 Line Regulation with Duty Cycle Control 10µF 16V 3999 TA01a 3999 TA01b For more information www.linear.com/LT3999 1 3999f LT3999 ABSOLUTE MAXIMUM RATINGS
    (Note 1) SWA, SWB . ­0.3V to 80V VIN, UVLO . ­0.3V to 60V OVLO/DC, SYNC . ­0.3V to 8V Operating Junction Temperature Range (Note 2) LT3999E . ­40°C to 125°C LT3999I . ­40°C to 125°C LT3999H . ­40°C to 150°C LT3999MP . ­55°C to 150°C Storage Temperature Range . ­65°C to 150°C Lead Temperature (Soldering, 10 sec) MSOP . 300°C PIN CONFIGURATION
    TOP VIEW TOP VIEW SWA RBIAS VIN UVLO OVLO/DC 1 2 3 4 5 11 GND 10 9 8 7 6 SWB ILIM/SS SYN ...

Цены

    ПоставщикПроизводительНаименованиеЦена
    ЭлитанLinear TechnologyLT3999EMSE343 руб.
    Подробнее об условиях поставки »

Варианты написания: LT3999EMSEPBF, LT3999EMSE PBF

Выписка из документа:
LT3999 Low Noise, 1A, 1MHz Push-Pull DC/DC Driver with Duty Cycle Control FEATURES n DESCRIPTION
The LT®3999 is a monolithic, high voltage, high frequency DC/DC transformer driver providing isolated power in a small solution footprint. The LT3999 has two 1A current limited power switches that switch out of phase. The duty cycle is programmable to adjust the output voltage. The switching frequency is programmed up to 1MHz and can be synchronized to an external clock for more accurate placement of switcher harmonics. The input operating range is programmed with the precision undervoltage and overvoltage lockouts. The supply current is reduced to less than 1µA during shutdown. A user-defined RC time constant provides an adjustable soft-start capability by limiting the inrush current at start-up. The LT3999 is available in a 10-lead MSOP and 3mm Ч 3mm DFN package with exposed pad.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Wide Input Operating Range: 2.7V to 36V Dual 1A Switches with...

На английском языке: Datasheet Linear Technology LT3999EMSE#PBF

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