UCC12040

• High-efficiency DC-DC converter with integrated transformer technology
• Meets CISPR32 Class B EMI limits without ferrite beads across entire load range on a 2-layer PCB
• Robust isolation barrier:
  • Isolation rating: 3 kV_RMS
  • Surge capability: 8 kV_PK
  • Working voltage: 850 V_RMS
  • CMTI (typical): ±100 V/ns
• Output power (typical): 500-mW
• Regulated 5.0-V or 3.3-V output with selectable 400-mV headroom voltage to power an LDO
• Input voltage: 4.5 V to 5.5 V
• Short circuit recovery
• Thermal shutdown
• 16-pin wide-body SOIC package with > 8-mm creepage and clearance
• Extended temperature range: –40ºC to 125ºC
• Planned safety-related certifications:
  • 3000-V_RMS isolation for 1 minute per UL 1577
  • CSA certification per IEC 60950-1, IEC 62368- 1 and IEC 60601-1 end equipment standards
  • CQC approval per GB4943.1-2011

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UCC12040 is a DC/DC converter with 3-kV_RMS basic isolation rating designed to provide efficient, isolated power to isolated circuits that require a bias supply with a well-regulated output voltage. The device integrates a transformer and DC/DC controller with a proprietary architecture to provide 500 mW (typical) of isolated power with high efficiency and low EMI.

The UCC12040 integrates protection features for increased system robustness. The device also has an enable pin, synchronization capability, and regulated 5-V or 3.3-V output options with headroom. The UCC12040 is a low-profile, miniaturized solution offered in a wide-body SOIC package with 2.65-mm height (typical).