TL3843 Datasheet PDF

●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 precision reference trimmed for accuracy at the error amplifier input. Other internal circuits include logic to ensure latched operation, a pulse-width modulation (PWM) comparator (that also provides current-limit control), and a totem-pole output stage designed to source or sink high-peak current. The output stage, suitable for driving N-channel MOSFETs, is low when it is in the off state.

● 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