UMW UC3842B

UMW R UMW UC3842/43/44/45 Description The 3842/43/44/45 are fixed frequency current mode PWM controller. They are specially designed for OFF−Line and DC to DC converter applications with a minimal external components. Internally implemented circuits include a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing com...
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Технические характеристики

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Корпус SOP-8
Входное напряжение
Максимальный выходной ток
Кол-во выходов
Частота преобразования
Рабочая температура
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Аналоги 3

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Тип Наименование Корпус Упаковка i Тип Режим Uвх Uвых Iвых Выходов F преобр Iпотр nmax Опции Примечание T раб Карточка
товара
P= UC3842B (YOUTAI)
 
SOP-8 в ленте 2500 шт
P= UC3842BL-S08-R (UTC)
 
SOP-8 200 шт
 
P= UC2842B (YOUTAI)
 
SO-8 SOIC8 в ленте 2500 шт

Файлы 1

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UMW R UMW UC3842/43/44/45 Description The 3842/43/44/45 are fixed frequency current mode PWM controller. They are specially designed for OFF−Line and DC to DC converter applications with a minimal external components. Internally implemented circuits include a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totempole output ideally suited for driving a power MOSFET. Protection circuitry includes built undervoltage lockout and current limiting. The 3842 and 3844 have UVLO thresholds of 16 V (on) and 10 V (off). The corresponding thresholds for the 3843/ 45 are 8.4V (on) and 7.6V (off). The 3842) and 3843 can operate within 100% duty cycle. The 3844 and 3845 can operate within 50% duty cycle. The 384X has Start-Up Current 0.5mA (typ). Features • • • • Pin Connection Low Start-Up and Operating Current High Current Totem Pole Output Undervoltage Lockout With Hysteresis Operating Frequency Up To 500KHz Top view Block diagram (toggle flip flop used only in 3844, 3845) V R T Absolute Maximum Ratings Symbol VCC Parameter Maximum Units Supply Voltage (low impedance source) 30 V IO Output Current ±1 A VI Input Voltage (Analog Inputs pins 2,3) −0.3 to 5.5 V Error Amp Output Sink Current Power Dissipation (TA=250C) Storage Temperature Range 10 1 -65 to150 mA W o C ISINK (E.A) Po Tstg TL TA Lead Temperature (soldering 5 sec.) Operating Ambient Temperature www.umw-ic.com 1 260 o 0 to 70 o C C 友台半导体有限公司 PDF
Документация на UMW UC3842B 

Дата модификации: 01.05.2023

Размер: 869.1 Кб

7 стр.

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