TL2845 - Texas Instruments

TL2845 Current-Mode PWM Controllers

The TL284x and TL384x series of control integrated circuits provide the features that are necessary to implement off-line or DC-to-DC fixed-frequency current-mode control schemes, with a minimum number of external components. Some of the internally implemented circuits are an undervoltage lockout (UVLO), featuring a start-up current of less than 1 mA, and a .

Features

•1 Optimized for Off-Line and DC-to-DC Converters
• Low Start-Up Current (< 1 mA)
• Automatic Feed-forward compensation
• Pulse-by-Pulse Current Limiting
• Enhanced Load-Response Characteristics
• Undervoltage Lockout With Hysteresis
• Double-Pulse Suppression
• High-Current Totem-Pole Output
• Internally Trimmed Bandgap Reference
• 500-kHz Operation
• Error Amplifier With Low Output Resistance
• Designed to be Interchangeable with UC2842 and UC3842 Series 2 Applications
• Switching regulators of any polarity
• Transformer-coupled DC/DC convertors Device Pinout Drawing SOIC (14) 3 Description.