UC2525BDW Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The UC2525BDW is a voltage-mode PWM controller IC supporting boost, flyback, forward, full-bridge, half-bridge, and push-pull converter topologies with an 8 V to 40 V input range. It delivers programmable switching frequency, soft-start, and dead-time control in a 16-pin SOIC package. Available from stock worldwide with RoHS-compliant e4 finish.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- UC2525BDW Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -25.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Voltage-mode PWM control supporting six converter topologies including full-bridge and push-pull from a single IC
- Input voltage range from 8 V to 40 V covering a wide range of industrial and telecom power supply designs
- Programmable oscillator frequency, soft-start, and dead-time adjustment for flexible power converter customization
- 16-pin SOIC package reduces board space compared to DIP alternatives while maintaining through-hole-compatible footprint options
Applications
The UC2525BDW is designed for isolated and non-isolated DC-DC power conversion in industrial power supplies, telecom equipment, and motor drive auxiliary supplies. Its flexible PWM architecture supports boost, flyback, and bridge topologies, allowing engineers to use a single controller IC across multiple power conversion stages. Typical designs operate from 12 V to 36 V bus inputs with switching frequencies up to several hundred kilohertz.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | VOLTAGE-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 40V |
| Input Voltage-Min | 8V |
| Input Voltage-Nom | 20V |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Output Current-Max | 0.5A |
| 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) | 20mA |
| Supply Voltage-Max (Vsup) | 40V |
| Supply Voltage-Min (Vsup) | 8V |
| Surface Mount | YES |
| Switcher Configuration | PUSH-PULL |
| Switching Frequency-Max | 500kHz |
| Technology | BIPOLAR |
| Temperature Grade | OTHER |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| ## UC2525BDW Alternates Showing results | Image |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for UC2525BDW:
Switching Controller, Voltage-mode, 0.5A, 500kHz Switching Freq-Max, BIPolar, PDSO16
Switching Controller, Voltage-mode, 0.5A, 400kHz Switching Freq-Max, BIPolar, PDSO16
Switching Controller, Voltage-mode, 0.5A, 500kHz Switching Freq-Max, BIPolar, PDSO16
suggested
suggested
Frequently Asked Questions
What input voltage range does UC2525BDW support in a flyback converter design?
UC2525BDW accepts input voltages from 8 V to 40 V, with a nominal operating point of 20 V, making it suitable for 12 V and 24 V bus flyback converter designs common in industrial and telecom equipment. The wide input range accommodates unregulated rectified rails without requiring additional pre-regulation.
How does UC2525BDW implement dead-time control in a full-bridge topology?
UC2525BDW generates complementary PWM outputs with programmable dead time set by an external resistor connected to the dead-time pin, preventing shoot-through in full-bridge and half-bridge switch configurations. Dead time is adjustable from near 0 ns to over 200 ns depending on the resistor value chosen, protecting the switching FETs.
For a 24 V to 5 V isolated power supply, how does UC2525BDW compare to a fixed-frequency controller?
UC2525BDW's programmable oscillator allows the switching frequency to be set by external resistor and capacitor values, offering more design flexibility than fixed-frequency controllers. At 24 V input with a forward converter topology, the switching frequency can be tuned from tens of kilohertz to several hundred kilohertz to optimize transformer size and EMI performance.
What package does UC2525BDW use and how does it simplify PCB layout for a push-pull converter?
UC2525BDW is housed in a 16-pin SOIC package with 1.27 mm pitch, enabling compact placement near gate drive and feedback network components on the PCB. The SOIC format reduces lead inductance compared to PDIP, which is beneficial at high switching frequencies in push-pull and bridge converter layouts.
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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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