最新无码a∨在线观看,一本av高清一区二区三区,亚洲熟妇色l20p,宅男噜噜69av,中出あ人妻熟女中文字幕

UC2842B

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER

DESCRIPTION TheUC384xBfamilyofcontrolICsprovidesthenecessaryfeaturestoimplementoff-lineorDCtoDCfixedfrequencycurrentmodecontrolschemeswithaminimalexternalpartscount.InternallyimplementedcircuitsincludeatrimmedoscillatorforpreciseDUTYCYCLECONTROLundervolta

UC2842B

High Performance Current Mode Controllers

TheUC3842B,UC3843Bseriesarehighperformancefixed frequencycurrentmodecontrollers.Theyarespecificallydesignedfor Off?LineandDC?DCconverterapplicationsofferingthedesigner acost?effectivesolutionwithminimalexternalcomponents.These integratedcircuitsfeatureatrimmed

UC2842B

Low Start-Up and Operating Current

Description The2842/43/44/45arefixedfrequencycurrentmodePWMcontroller.TheyarespeciallydesignedforOFF?LineandDCto DCconverterapplicationswithaminimalexternalcomponents.Internallyimplementedcircuitsincludeatrimmedoscillatorforprecise dutycyclecontrol,atemperat

UC2842B

Low Start-Up and Operating Current

Description The2842/43/44/45arefixedfrequencycurrentmodePWMcontroller.TheyarespeciallydesignedforOFF?LineandDCto DCconverterapplicationswithaminimalexternalcomponents.Internallyimplementedcircuitsincludeatrimmedoscillatorforprecise dutycyclecontrol,atemperat

UC2842B

HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS; Current mode operation:500 kHz Low start-up current value<0.5mA Latching PWM for cycle-by-cycle current limiting Trimmed oscillator discharge current Automatic feed-forward compensation Internally trimmed reference with UVLO High-current totem-pole output UVLO with hysteresis Double-pulse suppression;

The? UTC? UC2842B? provides? off-line? or? DC-DCfixed-frequency current-mode control design with minimumexternal components. Internally-implemented circuits include anunder-voltage lockout (UVLO) and a precision reference withaccuracy at the error amplifier input. The UTC UC2842B alsocontain internal circuits which include a pulse width modulation(PWM) comparator providing current-limit control, logic ensuringlatched operation, and a totem-pole output stage designed tosource or sink high-peak current. The output stage is low when itis in off-state condition and suitable for N-channel MOSFETsdriving.The UTC UC2842B also has following advantages: thestart-up current lower than 0.5mA while the oscillator dischargecurrent is specified to 8.3mA (Typ.). In UVLO conditions, theoutput has a maximum saturation voltage of 1.2V when sinking10mA @ V CC = 5V.

UC2842B

高性能電流模式 PWM 控制器; ? Trimmed Oscillator for Precise Frequency Control\n? Oscillator Frequency Guaranteed at 250 kHz\n? Current Mode Operation to 500 kHz\n? Automatic Feed Forward Compensation\n? Latching PWM for Cycle-By-Cycle Current Limiting\n? Internally Trimmed Reference with Undervoltage Lockout\n? High Current Totem Pole Output\n? Undervoltage Lockout with Hysteresis\n? Low Startup and Operating Current\n? Pb-Free Packages are Available\n;

The UC3842B, UC3843B series are high performance fixed frequency current mode controllers. They are specifically designed for Off-Line and dc-to-dc converter applications offering the designer a cost-effective solution with minimal external components. These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET. Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle-by-cycle current limiting, programmable output deadtime, and a latch for single pulse metering. These devices are available in an 8-pin dual-in-line and surface mount (SO-8) plastic package as well as the 14-pin plastic surface mount (SO-14). The SO-14 package has separate power and ground pins for the totem pole output stage. The UCX842B has UVLO thresholds of 16 V (on) and 10 V (off), ideally suited for off-line converters. The UCX843B is tailored for lower voltage applications having UVLO thresholds of 8.5 V (on) and 7.6 V (off).

UC2842B

PWM控制器;

UC2842BD

HIGH PERFORMANCE CURRENT MODE CONTROLLERS

HighPerformanceCurrentModeControllers TheUC3842B,UC3843Bseriesarehighperformancefixedfrequencycurrentmodecontrollers.TheyarespecificallydesignedforOff–Lineanddc–to–dcconverterapplicationsofferingthedesigneracost–effectivesolutionwithminimalexternalcomponents.Th

UC2842BD1

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER

DESCRIPTION TheUC384xBfamilyofcontrolICsprovidesthenecessaryfeaturestoimplementoff-lineorDCtoDCfixedfrequencycurrentmodecontrolschemeswithaminimalexternalpartscount.InternallyimplementedcircuitsincludeatrimmedoscillatorforpreciseDUTYCYCLECONTROLundervolta

UC2842BD1

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER

DESCRIPTION TheUC384xBfamilyofcontrolICsprovidesthenecessaryfeaturestoimplementoff-lineorDCtoDCfixedfrequencycurrentmodecontrolschemeswithaminimalexternalpartscount.InternallyimplementedcircuitsincludeatrimmedoscillatorforpreciseDUTYCYCLECONTROLundervolta