UCC2805QDRHT Texas Instruments In Stock
UCC2805QDRHT is a low-power BiCMOS current-mode PWM controller by Texas Instruments. Key specs: 1 MHz maximum oscillator frequency, 10 mA output drive capability, and 7V to 40V supply range. Available in SOIC packaging for cost-effective, high-volume power supply designs.
- Manufacturer
- Texas Instruments
- Package
- —
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- N/A
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Current-mode PWM control for inherent cycle-by-cycle overcurrent protection
- Oscillator frequency up to 1 MHz for compact magnetics design
- Wide supply range from 7V to 40V covering diverse power architectures
- 10 mA gate drive output for MOSFET switching in isolated topologies
- Trimmed reference voltage for accurate feedback regulation
- Low quiescent current for improved light-load efficiency
Applications
The UCC2805QDRHT is designed for cost-sensitive, high-density power supplies including off-line flyback converters, forward converters, and DC/DC modules operating up to 1 MHz. Its current-mode control simplifies compensation and provides fast transient response for telecom, industrial, and server power applications. The wide 7V to 40V supply range allows the controller to operate directly from an auxiliary winding in both low-voltage and bus-powered converter platforms.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for UCC2805QDRHT:
Switching Controller, Current-mode, 1A, 1000kHz Switching Freq-Max, BICMOS, PDSO8
Switching Controller, Current-mode, 1A, 1000kHz Switching Freq-Max, BICMOS, PDSO8
Frequently Asked Questions
What is the maximum switching frequency supported by the UCC2805QDRHT, and how does that affect transformer size?
The UCC2805QDRHT supports oscillator frequencies up to 1 MHz, allowing transformer core volume to scale roughly inversely with frequency. Pushing the switching frequency to 500 kHz or higher can reduce transformer size by more than 50% compared to a 100 kHz design, enabling more compact PCB layouts in notebook adapters and telecom power modules.
Which control topology does the UCC2805QDRHT implement, and why is it preferred for overcurrent protection?
It implements peak current-mode control, which inherently limits peak switch current on every cycle without requiring additional external circuitry. This cycle-by-cycle limiting responds in under 1 µs to fault conditions, protecting power MOSFETs with drain-source voltage ratings down to 40V in flyback and forward converter topologies.
Over what input supply voltage range can the UCC2805QDRHT be powered, making it suitable for both 12V and 48V bus systems?
The UCC2805QDRHT operates from a supply voltage of 7V to 40V, which spans both 12V auxiliary rails common in ATX and server power supplies and the 48V bus used in telecom and distributed power architectures. A single controller design can therefore address both market segments without changing the controller IC, reducing SKU count and qualification effort.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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