Texas Instruments UCC24650 200V Wake-Up Monitor is an easy-to-use secondary-side voltage monitor that periodically measures its own VDD voltage.
A relative droop of 3% from the previous reading triggers an alert signal to a receiving primary-side regulation (PSR) controller. Its low-power consumption helps achieve <5mW standby loss in many applications.
An internal 200V MOSFET switch is applied across a ground-referenced rectifier to provide a current-limited pulse to the flyback transformer secondary winding, which couples the signal to the primary-side controller. This signal is repeated at 33kHz until controller-driven switching activity is detected.
Features
- Enables Excellent Load Transient Performance and Zero Standby Power
- Enables Smallest Output Capacitor for Tight ΔVOUT
- No External Components Required
- <50 µA Device Current Consumption (Typical)
- 5V to 28V Output Monitoring Capability
- 3% Voltage Droop Detection (Patent Pending)
- 200V Wake-Up Switch
- Enables and Disables SR Controller, Relay Control, or Other Secondary Circuits
- SOT-23 5-Pin Package
Applications
- <5mW Zero-Power Standby Applications
- Adapters and Chargers for Consumer Electronics
- Smart Phones, Tablets, Set-Top Box
- TV and Monitor Power Supplies
- Home Appliance SMPS
- Refrigerator, Washing Machine, Air Conditioners
- Industrial Power Supplies for Lighting and Home Automation
