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UC1843J/883B Texas Instruments
Texas Instruments
Texas Instruments Incorporated (TI) is a global semiconductor powerhouse, crafts advanced analog ICs and embedded processors. Fueled by top-tier minds, TI's innovations drive tech's future, impacting 100,000+ clients.
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• Optimized for off-line and DC-to-DC converters
• Low start-up current (< 1 mA)
• Automatic feedforward compensation
• Pulse-by-pulse current limiting
• Enhanced load-response characteristics
• Undervoltage lockout with hysteresis
• Double-pulse suppression
• High-current totem-pole output
•
• Up to 500-kHz operation
• Error amplifier with low output resistanceInternally trimmed bandgap reference
internallyThe UCx84x series of control integrated circuitsprovide the features that are necessary to implementoff-line or DC-to-DC fixed-frequency current-modecontrol schemes, with a minimum number of externalimplemented circuitscomponents. Theinclude an undervoltage lockout (UVLO), featuring astart-up current of less than 1 mA, and a precisionreference trimmed for accuracy at the error amplifierinput. Other internal circuits include logic to ensurelatched operation, a pulse-width modulation (PWM)comparator that also provides current-limit control,and a totem-pole output stage that is designed tosource or sink high-peak current. The output stage,suitable for driving N-channel MOSFETs, is low whenit is in the off state.temperatureThe UCx84x family offers a variety of packageoptions,range options, choice ofmaximum duty cycle, and choice of turnon and turnoffthresholds and hysteresis ranges. Devices with higherturnon or turnoff hysteresis are ideal choices for off-line power supplies, while the devices with a narrowerhysteresis range are suited for DC-DC applications.The UC184x devices are specified for operation from–55°C to 125°C, the UC284x series is specified foroperation from –40°C to 85°C, and the UC384x seriesis specified for operation from 0°C to 70°C.Device Information(1)Simplified Application
• Switching regulators of any polarity
• Transformer-coupled DC-DC converters
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TYPE | DESCRIPTION | Select all |
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Series | * | |
Supplier Device Package | - | |
Package / Case | - | |
Mounting Type | - | |
Operating Temperature | - | |
Current - Supply | - | |
Voltage - Supply | - | |
Voltage - Input | - | |
Applications | - | |
Programmable | Not Verified | |
Product Status | Active | |
Package | Bulk |
Texas Instruments
Texas Instruments Incorporated (TI) is a global semiconductor powerhouse, crafts advanced analog ICs and embedded processors. Fueled by top-tier minds, TI's innovations drive tech's future, impacting 100,000+ clients.
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