UCC2891PW
Active110-V ACTIVE CLAMP CURRENT MODE PWM CONTROLLER WITH P-CHANNEL CLAMP FET AND 0.75V CS THRESHOLD
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UCC2891PW
Active110-V ACTIVE CLAMP CURRENT MODE PWM CONTROLLER WITH P-CHANNEL CLAMP FET AND 0.75V CS THRESHOLD
Technical Specifications
Parameters and characteristics for this part
| Specification | UCC2891PW |
|---|---|
| Clock Sync | True |
| Control Features | Soft Start, On Time Control, Enable, Ramp, Current Limit |
| Duty Cycle (Max) [Max] | 70 % |
| Frequency - Switching | 250 kHz |
| Function | Step-Up/Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 85 C |
| Operating Temperature [Min] | -40 ¯C |
| Output Configuration | Isolation Capable, Positive |
| Output Phases | 1 |
| Output Type | Transistor Driver |
| Package / Case | 16-TSSOP |
| Package / Case [y] | 4.4 mm |
| Package / Case [y] | 0.173 in |
| Supplier Device Package | 16-TSSOP |
| Synchronous Rectifier | False |
| Topology | Forward Converter, Flyback |
| Voltage - Supply (Vcc/Vdd) [Max] | 16 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 8.5 V |
| Part | Mounting Type | Package / Case | Package / Case | Output Phases | Frequency - Switching | Number of Outputs | Control Features | Duty Cycle (Max) [Max] | Voltage - Supply (Vcc/Vdd) [Min] | Voltage - Supply (Vcc/Vdd) [Max] | Clock Sync | Output Configuration | Output Type | Synchronous Rectifier | Operating Temperature [Max] | Operating Temperature [Min] | Function | Topology | Supplier Device Package | Package / Case [y] | Package / Case [y] | Outputs and Type | Outputs and Type | Board Type | Supplied Contents | Voltage - Input [Max] | Voltage - Input [Min] | Regulator Topology | Utilized IC / Part | Voltage - Output | Current - Output | Main Purpose | Contents |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 Texas Instruments | Surface Mount | 16-SOIC | 0.154 in 3.9 mm | 1 | 250 kHz | 1 | Current Limit Enable On Time Control Ramp Soft Start | 70 % | 8.5 V | 16 V | Isolation Capable Positive | Transistor Driver | 85 C | -40 ¯C | Step-Up/Step-Down | Flyback Forward Converter | 16-SOIC | ||||||||||||||||
Texas Instruments | Surface Mount | 16-SOIC | 0.154 in 3.9 mm | 1 | 250 kHz | 1 | Current Limit Enable On Time Control Ramp Soft Start | 70 % | 8.5 V | 16 V | Isolation Capable Positive | Transistor Driver | 85 C | -40 ¯C | Step-Up/Step-Down | Flyback Forward Converter | 16-SOIC | ||||||||||||||||
Texas Instruments | Surface Mount | 16-TSSOP | 1 | 250 kHz | 1 | Current Limit Enable On Time Control Ramp Soft Start | 70 % | 8.5 V | 16 V | Isolation Capable Positive | Transistor Driver | 85 C | -40 ¯C | Step-Up/Step-Down | Flyback Forward Converter | 16-TSSOP | 4.4 mm | 0.173 in | |||||||||||||||
Texas Instruments | Surface Mount | 16-SOIC | 0.154 in 3.9 mm | 1 | 250 kHz | 1 | Current Limit Enable On Time Control Ramp Soft Start | 70 % | 8.5 V | 16 V | Isolation Capable Positive | Transistor Driver | 85 C | -40 ¯C | Step-Up/Step-Down | Flyback Forward Converter | 16-SOIC | ||||||||||||||||
 Texas Instruments | 250 kHz | 1 | 1 Non-Isolated Output Non-Isolated | Fully Populated | Board(s) | 75 V | 36 V | Forward Converter | UCC2891 | 3.3 V | 30 A | DC/DC Step Down | Board(s) | ||||||||||||||||||||
Texas Instruments | Surface Mount | 16-TSSOP | 1 | 250 kHz | 1 | Current Limit Enable On Time Control Ramp Soft Start | 70 % | 8.5 V | 16 V | Isolation Capable Positive | Transistor Driver | 85 C | -40 ¯C | Step-Up/Step-Down | Flyback Forward Converter | 16-TSSOP | 4.4 mm | 0.173 in | |||||||||||||||
 Texas Instruments | Surface Mount | 16-SOIC | 0.154 in 3.9 mm | 1 | 250 kHz | 1 | Current Limit Enable On Time Control Ramp Soft Start | 70 % | 8.5 V | 16 V | Isolation Capable Positive | Transistor Driver | 85 C | -40 ¯C | Step-Up/Step-Down | Flyback Forward Converter | 16-SOIC |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | N/A | 529 | $ 3.96 | |
| Tube | 1 | $ 3.26 | ||
| 10 | $ 2.93 | |||
| 90 | $ 2.40 | |||
| 270 | $ 2.28 | |||
| 540 | $ 2.04 | |||
| 1080 | $ 1.72 | |||
| 2520 | $ 1.64 | |||
| 5040 | $ 1.58 | |||
| Texas Instruments | TUBE | 1 | $ 2.77 | |
| 100 | $ 2.43 | |||
| 250 | $ 1.70 | |||
| 1000 | $ 1.37 | |||
Description
General part information
UCC2891 Series
The UCC2891/2/3/4 family of PWM controllers is designed to simplify implementation of the various active clamp/reset switching power topologies.
The UCC289x is a peak current-mode, fixedfrequency, high-performance pulse width modulator. It includes the logic and the drive capability for the auxiliary switch with a simple method of programming the critical delays for proper active clamp operation.
The UCC2891/3 includes a 110-V start-up regulator for initial start-up and to provide keep-alive power during stand-by.
Documents
Technical documentation and resources