UC2902DG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
UC2902DG4 is a single-channel voltage-mode load-share controller IC operating up to 20 V, designed to balance current between paralleled power supply modules. It features an adjustable threshold and fits in an 8-pin SOIC package, targeting redundant and distributed power systems in telecom and industrial applications.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- UC2902DG4 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.6153(MOQ 150)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of UC2902DG4?
- Voltage-mode load-share control for paralleled power supplies
- Single-channel architecture with adjustable sharing threshold
- Up to 20 V input operating voltage
- 8-pin SOIC compact package for space-constrained power designs
- Drives external pass element to equalize module output currents
- Compatible with N+1 redundant power supply configurations
What is UC2902DG4 used for?
UC2902DG4 enables accurate current sharing among multiple paralleled DC power modules in telecom base stations, server power supplies, and industrial control systems. By continuously adjusting each module's output to equalize load current within a few percent, it prevents thermal imbalance and extends system reliability in N+1 redundant architectures. It is also used in distributed power networks where 2 to 8 supplies must share a common 12 V or 24 V bus without active sequencing microcontrollers.
What are the specifications of UC2902DG4?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Adjustable Threshold | YES |
| Analog IC - Other Type | VOLTAGE SUPERVISOR/RESET IC |
| Control Mode | VOLTAGE-MODE |
| Input Voltage-Max | 20V |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e4 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Output Current-Max | 6A |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 10mA |
| Supply Voltage-Max (Vsup) | 20V |
| Supply Voltage-Min (Vsup) | 2.7V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Switcher Configuration | BUCK-BOOST |
| Technology | BIPOLAR |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Threshold Voltage-Nom | +0.7V |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Mexico |
Where can I find the UC2902DG4 datasheet?
UC2902DG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for UC2902DG4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does UC2902DG4 achieve current sharing between parallel power supply modules?
UC2902DG4 uses a voltage-mode control loop that monitors each module's output current via a sense resistor and compares it to a shared current-bus signal representing the average load current. When a module carries more than its fair share, the IC trims that module's output voltage down by a few millivolts, redistributing current to the other modules. This technique keeps current balance within 2 to 5 percent across modules rated up to 20 V output.
In an N+1 redundant server power architecture, how many UC2902DG4 devices are needed?
One UC2902DG4 is required per power module in an N+1 configuration. For a system using 4 modules sharing a 12 V, 100 A bus, 4 individual ICs each monitor their own module's 25 A portion and drive an external pass transistor to maintain equal sharing. The 8-pin SOIC footprint keeps the added area per module below 30 mm², which is easily accommodated in a standard power supply PCB layout.
What external components are required to set the load-sharing threshold on UC2902DG4?
The adjustable threshold is set with a resistor divider connected to the threshold input pin, allowing designers to define the current imbalance level—typically 5 to 10 percent of rated module current—that triggers corrective action. A current-sense resistor in the milliohm range on the output path provides the voltage signal the IC monitors, and a small compensation capacitor on the error amplifier output sets the control loop bandwidth to several kilohertz for stable sharing up to 20 V bus operation.
How does UC2902DG4's 8-pin SOIC package benefit system designers compared to larger controller ICs?
The 8-pin SOIC occupies approximately 30 mm² of PCB area and is compatible with standard pick-and-place assembly, minimizing manufacturing cost. Its small footprint allows the load-share controller to be placed directly adjacent to the current-sense resistor and pass element on a module power board, reducing signal trace length and parasitic inductance that could destabilize the control loop in high-current 10 A to 50 A module designs.
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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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 150+ | $3.6153 | $542.29 |
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