UC2846N Current-Mode PWM Controller 500kHz, 8-40V Input 1A Totem Pole DIP-16 -40°C to +85°C

UC2846N

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Features

andbull; Automatic Feedforward Compensation

andbull; Programmable Pulse-by-Pulse Current Limiting

andbull; Automatic Symmetry Correction in Push-Pull Configuration

andbull; Enhanced Load Response Characteristics

andbull; Parallel Operation Capability for Modular Power Systems

andbull; Differential Current Sense Amplifier with Wide Common Mode Range

andbull; Double-Pulse Suppression

andbull; 500-mA (Peak) Totem-pole Outputs

andbull; andplusmn;1%BandGapReference

andbull; Undervoltage Lockout

andbull; Soft-Start Capability

andbull; Shutdown Terminal

andbull; 500-kHz Operation

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Applications

andbull; Telecommunication Power Converters

andbull; Industrial Power Converters

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Description

The UC1846/7 family of control devices provides all of the necessary features to implement fixed frequency, current-mode control schemes while maintaining a minimum external parts count. The superior performance of this technique can be measured in improved line regulation, enhanced load response characteristics, and a simpler, easier-to design control loop. Topological advantages include inherent pulse-by-pulse current limiting capability, automatic symmetry correction for push-pull converters, and the ability to parallel power modules while maintaining equal current sharing.

Protection circuitry includes built-in undervoltage lockout and programmable current limit, in addition to soft-start capability. A shutdown function is also available, which can initiate either a complete shutdown with automatic restart or latch the supply off.

Other features include fully-latched operation, double pulse suppression, deadline adjust capability, and a andplusmn;1% trimmed band gap reference.

The UC1846 features low outputs in the OFF state, while the UCx847 features high outputs in the OFF state.

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INFORMATION

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Drawing

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• High quality products --- our offers are 100% new and original, ROHS
• Competitive price --- good Purchase channels with good price.
• Professional service --- strict quality testing before the shipment, and perfect after-sales service after the purchase.
• Adequate inventory --- With the support of our strong Purchasing team,
• Fast delivery --- we will ship the goods within 1-3 working days after the payment confirmed.

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