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 0.5 mA, oscillator discharge is trimmed to 8.3 mA, and during UVLO, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V.
Parameters
- Topology : Boost, Buck, Flyback, Forward
- Duty cycle (Max) (%) : 100
- Vin (Max) (V) : 28
- UVLO thresholds on/off (V) : 8.4/7.6
- Features : Adjustable Switching Frequency, Current Limiting, Dead Time Control, Error Amplifier, Multi-topology
- Operating temperature range (C) : 0 to 70
- Switching frequency (Max) (kHz) : 500
- Rating : Catalog
- Gate drive (Typ) (A) : 1
Features:
- Optimized for Off-Line and DC-DC Converters
- Low Start-Up Current (< 0.5 mA)
- Trimmed Oscillator Discharge Current
- Automatic Feedforward 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
- Up to 500-kHz Operation
Applications
- Switch Mode Power Supplies (SMPS)
- DC-DC Converters
- Power Modules
- Industrial PSU
- Battery Operated PSU
Datasheet
