| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
|---|---|---|---|---|---|---|---|---|---|
|
2,500 pcs
|
2500 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
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| Manufacturer Name | |
| Clock Sync | |
| Control Features | |
| Duty Cycle (Max) | |
| Frequency | |
| Function | |
| Lead Spacing | |
| Lead Style | |
| Mounting Type | |
| Number of Outputs | |
| Operating Temperature | |
| Output Configuration | |
| Output Phases | |
| Output Type | |
| Shutdown | |
| Supplier Device Package | |
| Supplier Package | |
| Synchronous Rectifier | |
| Topology | |
| Voltage |
The Texas Instruments UCC2891D is a peak current-mode, fixed-frequency PWM controller designed to simplify the implementation of active clamp/reset switching power topologies such as forward and flyback converters. It operates within an 8.5V to 16V input voltage range and is housed in a 16-SOIC package.
Key features include a soft-stop shutdown, complementary auxiliary driver with programmable deadtime, cycle-by-cycle current limiting, and a 110-V input startup regulator on specific variants. The device also offers programmable slope compensation, a precise programmable maximum duty cycle, and a 1.0-MHz synchronizable oscillator, making it suitable for high-efficiency, low EMI/RFI off-line or DC/DC converters.
Applications for the UCC2891D include SMPS ranging from 150W to 700W, server power supplies, 48-V telecom and datacom equipment, and high-power adapters. Its surface mount package facilitates integration into compact designs.
The controller provides accurate line UV and OV thresholds and features TrueDrive outputs with 2-A sink and 2-A source capabilities. The programmable soft start and soft-stop shutdown features contribute to controlled power-up and shutdown sequences.
| Qty | Low | High |
|---|---|---|
| 1+ | $0.78 | $0.78 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The UCC2891D operates from 8.5V to 16V.
The switching frequency is 250 kHz, and the oscillator can be synchronized up to 1.0 MHz.
The UCC2891D is offered in a 16-SOIC (0.154", 3.90mm Width) surface-mount package.
The operating temperature range is -40°C to 85°C.
The UCC2891D supports flyback and forward converter topologies.
Yes, it features peak current-mode control with cycle-by-cycle current limiting.
The maximum duty cycle is 70%.