Радиолоцман Электроника en
расширенный поиск +
  

Datasheet Linear Technology LT1243IS8#TRPBF

Производитель:Linear Technology
Серия:LT1243
Модель:LT1243IS8#TRPBF

High Speed Current Mode Pulse Width Modulators

Datasheets

  • Скачать » Datasheet, PDF, 296 Кб
    Выписка из документа ↓
    LT1241 Series High Speed Current Mode Pulse Width Modulators FEATURES DESCRIPTIO Low Start-Up Current: < 250µA 50ns Current Sense Delay Current Mode Operation: To 500kHz Pin Compatible with UC1842 Series Undervoltage Lockout with Hysteresis No Cross-Conduction Current Trimmed Bandgap Reference 1A Totem Pole Output Trimmed Oscillator Frequency and Sink Current Active Pull-Down on Reference and Output During Undervoltage Lockout High Level Output Clamp: 18V Current Sense Leading Edge Blanking APPLICATI S Off-Line Converters DC/DC Converters
    , LTC and LT are registered trademarks of Linear Technology Corporation. The LT ®1241 series devices are 8-pin, fixed frequency, current mode, pulse width modulators. They are improved plug compatible versions of the industry standard UC1842 series. These devices have both improved speed and lower quiescent current. The LT1241 series is optimized for off-line and DC/DC converter applications. They contain a temperature-compensated reference, high gain error amplifier, current sensing comparator and a high current totem pole output stage ideally suited to driving power MOSFETs. Start-up current has been reduced to less than 250µA. Cross-conduction current spikes in the output stage have been eliminated, making 500kHz operation practical. Several new features have been incorporated. Leading edge blanking has been added to the current sense comparator. Trims have been added to the oscillator circuit for both frequency and sink current, and both of these parameters are tightly specified. The output stage is clamped to a maximum VOUT of 18V in the on state. The output and the reference output are actively pulled low during undervoltage lockout. BLOCK DIAGRA REFERENCE ENABLE 5V REF MAIN BIAS REFERENCE PULL-DOWN RT/CT 4 OSCILLATOR T S R 6 OUTPUT COMP FB 1 1mA 2 2.5V 5.6V 1V ­ + 2R ­
    R BLANKING +
    1.5V ISENSE 3 U
    UV LOCKOUT 8 7 VREF VCC OUTPUT PULL-DOWN 5 18V GND W UO + ­
    1241 BD01 1 LT1241 Series ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO
    TOP VIEW COMP 1 FB 2 ISENSE 3 RT/CT 4 J8 PACKAGE 8-LEAD CERDIP 8 7 6 5 VREF VCC OUTPUT GND Supply Voltage . 25V Output Current . ±1A* Output Energy (Capacitive Load per Cycle) .5µJ Analog Inputs (Pins 2, 3) . ­ 0.3 to 6V Error Amplifier Output Sink Current. 10mA Power Dissipation at TA 25°C . 1W Operating Junction Temperature Range LT124XC . 0°C to 100°C LT124XI. ­ 40°C to 100°C LT124XM. ­ 55°C to 125°C Storage Temperature Range . ­ 65°C to 150°C Lead Temperature (Soldering, 10 sec). 300°C
    *The 1A rating for output current is based on transient switching requirements. ORDER PART NUMBER LT ...

Цены

Классификация производителя

  • Power Management > Power Control > PWM Controllers

Варианты написания: LT1243IS8TRPBF, LT1243IS8 TRPBF

Выписка из документа:
LT1241 Series High Speed Current Mode Pulse Width Modulators FEATURES DESCRIPTIO Low Start-Up Current: < 250µA 50ns Current Sense Delay Current Mode Operation: To 500kHz Pin Compatible with UC1842 Series Undervoltage Lockout with Hysteresis No Cross-Conduction Current Trimmed Bandgap Reference 1A Totem Pole Output Trimmed Oscillator Frequency and Sink Current Active Pull-Down on Reference and Output During Undervoltage Lockout High Level Output Clamp: 18V Current Sense Leading Edge Blanking APPLICATI S Off-Line Converters DC/DC Converters
, LTC and LT are registered trademarks of Linear Technology Corporation. The LT ®1241 series devices are 8-pin, fixed frequency, current mode, pulse width modulators. They are improved plug compatible versions of the industry standard UC1842 series. These devices have both improved speed and lower quiescent current. The LT1241 series is optimized for off-line and DC/DC converter applications. They contain a temperature-compensated reference, high gain error amplifier, current sensing comparator and a high current totem pole output stage ideally suited to driving power MOSFETs. Start-up current has been reduced to less than 250µA. Cross-conduction current spikes in the output stage have been eliminated, making 500kHz operation practical. Several new features have been incorporated. Leading edge blanking has been added to the current sense comparator. Trims have been added...

На английском языке: Datasheet Linear Technology LT1243IS8#TRPBF

Рекомендуемые материалы по теме:

При перепечатке материалов с сайта прямая ссылка на РадиоЛоцман обязательна.

Срезы ↓
Датчики влажности и температуры ДВТ-03
Цена: от 3 168 руб.
Доставка: Россия и страны СНГ
DIY настольный 3D принтер
Цена: 163 $ (9500 руб.)
Промо-акция, последняя скидка
Очки с подсветкой и сменными окулярами
Цена: от 8 $ (477 руб.)
Бесплатная доставка: Весь мир
радиолоцман вконтакте радиолоцман одноклассники радиолоцман facebook радиолоцман twitter радиолоцман google плюс