UCC24650DBVT Part Information

Details for UCC24650DBVT by Texas Instruments

Semiconductors - ICs > Power Management ICs - PMIC > Supervisors & Monitors

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Part Description

The UCC24650 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 a wake-up alert signal to a receiving primary-side regulation (PSR) controller. Its low-power consumption helps achieve <5-mW ZeroPower standby loss in many applications. An internal 200-V MOSFET switch is applied across a ground-referenced rectifier to provide a currentlimited pulse to the flyback transformer secondary winding, which couples the signal to the primary-side controller. This signal is repeated at 33 kHz until controller-driven switching activity is detected. Relative-droop detection allows scaling to any voltage between 5 and 28 V. The wake-up alert function allows very-low standby frequency to minimize switching loss and reduction of output capacitance needed to respond to a heavy load step. This monitor is used with a controller capable of detecting the wake-up signal, such as the UCC28730 PSR flyback controller. The UCC24650 also provides an enable and disable signal which can be used to control a secondary-side circuit during no-load conditions to reduce standby power loss. Such a circuit may be a synchronous rectifier controller or a relay driver, for example.

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Part Features

  • 200-V Wake-Up Switch
  • 3% Voltage Droop Detection (Patent Pending)
  • 5-V to 28-V Output Monitoring Capability
  • <50 u00b5A Device Current Consumption (Typical)
  • Enables Excellent Load Transient Performance and Zero Standby Power
  • Enables Smallest Output Capacitor for Tight u0394VOUT
  • Enables and Disables SR Controller, Relay Control, or Other Secondary Circuits
  • No External Components Required
  • SOT-23 5-Pin Package

Part Specifications

Threshold Voltage -
No. of Supervisors / Monitors 1Monitors
Supply Voltage Min 4.5V
Supply Voltage Max 28V
Reset Type Open-Drain
Digital IC Case SOT-23
No. of Pins 5Pins
Delay Time -
Operating Temperature Min -40°C
Operating Temperature Max 125°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant Yes
MSL MSL 1 - Unlimited
SVHC No SVHC (27-Jun-2018)
RoHS Compliant

Alternative Part Descriptions

  • 200-V wake-up monitor for fast transient primary-side regulation | Texas Instruments

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