UC2825AMDWREPG4 Texas Instruments Integrated Circuit (Other) In Stock
UC2825AMDWREPG4 is a high-speed voltage-mode PWM controller with current-mode operation capability, supporting input voltages from 8.8 V to 20 V and switching frequencies up to 1 MHz in 16-pin SOIC package. It integrates cycle-by-cycle current limiting, soft-start control, and complementary output drivers suitable for offline and DC-DC power converter designs.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- UC2825AMDWREPG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of UC2825AMDWREPG4?
- Voltage-mode PWM control with optional current-mode operation for flexible converter topologies
- Switching frequency up to 1 MHz enabling compact magnetic component design
- Input voltage range: 8.8 V to 20 V for compatibility with 12 V power buses
- Dual complementary totem-pole output drivers for half-bridge and full-bridge topologies
- Programmable soft-start to limit inrush current during power-up
- Cycle-by-cycle overcurrent protection for fault-tolerant converter operation
What is UC2825AMDWREPG4 used for?
UC2825AMDWREPG4 is used in offline switching power supplies, DC-DC converters, and UPS systems where high switching frequencies above 500 kHz are required to reduce transformer and inductor size. It suits telecom rectifiers and industrial 24 V to 48 V bus converters where precise voltage regulation and programmable dead-time are needed for half-bridge topologies. The device is also employed in motor drive auxiliary power stages and server power modules requiring cycle-by-cycle protection and programmable soft-start.
What are the specifications of UC2825AMDWREPG4?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Additional Feature | ALSO OPERATES IN CURRENT MODE |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | VOLTAGE-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 20V |
| Input Voltage-Min | 8.8V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Output Current-Max | 2.2A |
| Output Voltage-Max | 5.15V |
| Output Voltage-Min | 5.05V |
| Output Voltage-Nom | 5.1V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 36mA |
| Surface Mount | YES |
| Switcher Configuration | PUSH-PULL |
| Switching Frequency-Max | 1150kHz |
| Technology | BIPOLAR |
| Temperature Grade | MILITARY |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the UC2825AMDWREPG4 datasheet?
UC2825AMDWREPG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for UC2825AMDWREPG4?
Compatible alternatives and drop-in replacements for UC2825AMDWREPG4:
Switching Controller, Voltage-mode, 2.2A, 1150kHz Switching Freq-Max, BIPolar, PDSO16
Switching Controller, Current/voltage-mode, 2.2A, 1000kHz Switching Freq-Max, BICMOS, PDSO16
Frequently Asked Questions
At what switching frequency can UC2825AMDWREPG4 operate, and how does this affect magnetics sizing?
UC2825AMDWREPG4 supports switching frequencies up to 1 MHz, set by an external resistor-capacitor network on the RT/CT pin. Operating at 500 kHz to 1 MHz reduces the required transformer core volume by approximately 4x compared to a 100 kHz design, enabling physically smaller magnetics for board-level DC-DC converters. The tradeoff is increased gate drive and switching losses in the external MOSFETs.
Does UC2825AMDWREPG4 support both voltage-mode and current-mode control, and when should each be used?
Yes, UC2825AMDWREPG4 operates primarily in voltage-mode PWM but also supports current-mode control when a current sense signal is fed to the appropriate input. Voltage-mode is preferred for stability in wide input-range offline converters where slope compensation is difficult, while current-mode provides inherent cycle-by-cycle current limiting beneficial in designs with load currents above 10 A or those requiring fast transient response under step loads.
What input voltage range does UC2825AMDWREPG4 accept, and can it operate from a 12 V telecom bus?
UC2825AMDWREPG4 operates from 8.8 V to 20 V supply, with a nominal design point of 12 V, making it directly compatible with standard telecom 12 V distributed power buses and PC ATX auxiliary rails. The 8.8 V minimum ensures continued operation during brownout conditions on a 12 V bus that sags to 73% of nominal, providing robust fault ride-through in server and networking equipment.
How does the programmable soft-start feature of UC2825AMDWREPG4 protect the power converter during turn-on?
UC2825AMDWREPG4 includes a soft-start pin where an external capacitor sets the ramp time from 0% to full duty cycle, typically 1 ms to 10 ms depending on capacitor value. During this ramp, the PWM duty cycle is clamped to the soft-start voltage divided by the oscillator ramp amplitude, limiting inrush current in the output inductor and bulk capacitors to safe levels and preventing input fuse blowing in converters with output capacitance above 1000 µF.
Which power converter topologies are supported by UC2825AMDWREPG4's complementary output drivers?
UC2825AMDWREPG4 provides two complementary totem-pole output drivers capable of sinking and sourcing 1 A peak current, with programmable dead-time to prevent cross-conduction. These outputs directly drive half-bridge, full-bridge, and push-pull converter topologies using external MOSFETs with gate capacitances up to 10 nF at 500 kHz switching frequency, covering the majority of 100 W to 2 kW isolated DC-DC converter designs used in telecom and industrial power supplies.
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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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