Catalog
Current Mode PWM Controller
Key Features
• Optimized for Off-Line and DC-DC ConvertersLow Start-Up Current (< 0.5mA)Trimmed Oscillator Discharge CurrentAutomatic Feedforward CompensationPulse-by-Pulse Current LimitingEnhanced Load Response CharacteristicsUndervoltage Lockout With HysteresisDouble Pulse SuppressionHigh-Current Totem Pole OutputInternally-Trimmed Bandgap ReferenceUp to 500kHz OperationCreate a Custom Design Using the UCx84xA With theWEBENCH Power DesignerOptimized for Off-Line and DC-DC ConvertersLow Start-Up Current (< 0.5mA)Trimmed Oscillator Discharge CurrentAutomatic Feedforward CompensationPulse-by-Pulse Current LimitingEnhanced Load Response CharacteristicsUndervoltage Lockout With HysteresisDouble Pulse SuppressionHigh-Current Totem Pole OutputInternally-Trimmed Bandgap ReferenceUp to 500kHz OperationCreate a Custom Design Using the UCx84xA With theWEBENCH Power Designer
Description
AI
The UCx84xA family of control devices is a pin-for-pin compatible improved version of the UCx84x family. Providing the necessary features to control current-mode or switched-mode power supplies, this family of devices has many improved features: startup current is less than 0.5mA, oscillator discharge is trimmed to 8.3mA, and during UVLO, the output stage can sink at least 10mA at less than 1.2V for VCC over 5V.
The UCx84xA family of control devices is a pin-for-pin compatible improved version of the UCx84x family. Providing the necessary features to control current-mode or switched-mode power supplies, this family of devices has many improved features: startup current is less than 0.5mA, oscillator discharge is trimmed to 8.3mA, and during UVLO, the output stage can sink at least 10mA at less than 1.2V for VCC over 5V.