Summary of UCC12040/50 3 KVRMS AND 5 KVRMS ISOLATED DC/DC CONVERTERS
Texas Instruments’ UCC12040 and UCC12050 are 500 mW isolated DC/DC converters with integrated transformer and controller, offering high efficiency, low EMI, and reinforced isolation (3 kVRMS and 5 kVRMS respectively). They provide regulated 5.0 V or 3.3 V outputs, protection features, synchronization, and are available in a low-profile wide-body SOIC package for robust, compact bias supplies in ultra-high-voltage applications.
Parts used in the UCC12040/50 DC/DC Converters Project:
- UCC12040 DC/DC converter (3 kVRMS reinforced isolation)
- UCC12050 DC/DC converter (5 kVRMS reinforced isolation)
- Integrated transformer inside UCC12040/50
- DC/DC controller integrated in UCC12040/50
- 16-pin wide-body SOIC package (typical, 2.65 mm height)
- External LDO (optional, to use headroom 400 mV option)
- PCB (2-layer recommended for EMI performance)
- Optional ferrite beads (not required to meet CISPR32 Class B per article)
Texas Instruments’ 500 mW, high-efficiency low-EMI converters are suitable for ultra-high voltage applications.
Texas Instruments’ UCC12040 and UCC12050 DC/DC converters with 3 kVRMS and 5 kVRMS reinforced isolation ratings, respectively, are designed to provide efficient, isolated power to isolated circuits that require a bias supply with well-regulated output voltages. These devices integrate a transformer and DC/DC controller with proprietary architecture to provide 500 mW (typical) of isolated power with high efficiency and low EMI.
The UCC12040/50 converters integrate protection features for increase system robustness. The devices feature an enable pin, synchronization capability and regulated 5 V or 3.3 V output options with the headroom. These low-profile, miniaturized converter solutions are available in a wide-body SOIC package with 2.65 mm height (typical).
Features:
- High-efficiency with integrated transformer technology
- Meets CISPR32 Class B EMI limits without ferrite beads across the load range on a 2-layer PCB
- Output power: 500 mW (typ.)
- Input voltage: 4.5 V to 5.5 V
- Package: 16-pin wide-body SOIC with >8 mm creepage and clearance
- Regulated 5.0 V to 3.3 V output with selectable 400 mV headroom voltage to power an LDO
- Short circuit recovery
- Thermal shutdown
- Extended temperature range: -40°C to +125°C
- Planned safety-related certification:
- CSA certification per IEC 60950-1, IEC 62368-1, and IEC 60601-1 end-equipment standards
- CQC approval per GB4943.1-2011
- 3,000 VRMS (UCC12040) and 5,000 VRMS (UCC12050) isolation for 1 minute per UL 1577
- Robust isolation barrier:
Read more: UCC12040/50 3 KVRMS AND 5 KVRMS ISOLATED DC/DC CONVERTERS
- What isolation ratings do the UCC12040 and UCC12050 provide?
The UCC12040 provides 3 kVRMS and the UCC12050 provides 5 kVRMS reinforced isolation. - How much output power do these converters deliver?
They provide 500 mW (typical) of isolated power. - What input voltage range do the converters support?
They support an input voltage range of 4.5 V to 5.5 V. - What regulated output voltages are available?
Regulated 5.0 V or 3.3 V output options are available. - Do the devices meet EMI limits without additional components?
Yes, they meet CISPR32 Class B EMI limits without ferrite beads across the load range on a 2-layer PCB. - What package do the converters come in?
They are available in a 16-pin wide-body SOIC package with typical 2.65 mm height and greater than 8 mm creepage and clearance. - What protection features are integrated?
They include short circuit recovery, thermal shutdown, and an enable pin, and synchronization capability. - Can these converters support an LDO for tighter regulation?
Yes, they offer a selectable 400 mV headroom voltage to power an external LDO. - What temperature range do they support?
They support an extended temperature range of -40°C to +125°C. - Are safety certifications planned or available?
Planned safety-related certifications include CSA per IEC 60950-1, IEC 62368-1, IEC 60601-1 end-equipment standards, and CQC approval per GB4943.1-2011; UL 1577 isolation testing at 3,000 VRMS (UCC12040) and 5,000 VRMS (UCC12050) for 1 minute is also noted.
