UC2846N
Features
• Automatic Feedforward Compensation
• Programmable Pulse-by-Pulse Current Limiting
• Automatic Symmetry Correction in Push-Pull Configuration
• Enhanced Load Response Characteristics
• Parallel Operation Capability for Modular Power Systems
• Differential Current Sense Amplifier with Wide Common Mode Range
• Double-Pulse Suppression
• 500-mA (Peak) Totem-pole Outputs
• ±1%BandGapReference
• Undervoltage Lockout
• Soft-Start Capability
• Shutdown Terminal
• 500-kHz Operation
Applications
• Telecommunication Power Converters
• Industrial Power Converters
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 ±1% trimmed band gap reference.
The UC1846 features low outputs in the OFF state, while the UCx847 features high outputs in the OFF state.
INFORMATION
| Category | | |
| Manufacturer | | |
| Series | | |
| Packaging | | |
| Part Status | | |
| Output Type | | |
| Function | Step-Up, Step-Up/Step-Down | |
| Output Configuration | | |
| Topology | Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull | |
| Number of Outputs | | |
| Output Phases | | |
| Voltage - Supply (Vcc/Vdd) | | |
| Frequency - Switching | | |
| Duty Cycle (Max) | | |
| Synchronous Rectifier | | |
| Clock Sync | | |
| Serial Interfaces | | |
| Control Features | Current Limit, Enable, Frequency Control, Soft Start | |
| Operating Temperature | | |
| Mounting Type | | |
| Package / Case | | |
| Supplier Device Package | | |
| Base Product Number | |
Drawing
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Product Tags:
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UC2846N Current-Mode PWM Controller 500kHz, 8-40V Input 1A Totem Pole DIP-16 -40°C to +85°C Images
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