UCC2891D, Switching Controllers Current Mode Active Clamp
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Описание
Semiconductors\Power Management ICs\Voltage Regulators & Voltage Controllers\Switching Controllers
UCC2891x High-Voltage Flyback SwitcherTexas Instruments UCC2891x High-Voltage Flyback Switcher is dedicated to isolated flyback power supplies and provides output voltage and current regulation without the use of an optical coupler. The device incorporates a 700V power FET and a controller that processes operating information from the auxiliary flyback winding and from the power FET to provide precise output voltage and current control. The integrated high-voltage current source for a startup that is switched off during device operation and the controller current consumption that is dynamically adjusted allows very low standby power. Control algorithms in the Texas Instruments UCC2891x, combining switching frequency and peak primary current modulation, allow operating efficiencies to meet or exceed applicable standards. Discontinuous conduction mode (DCM) with valley switching is used to reduce switching losses. The maximum switching frequency is 115kHz. Protection features help to keep secondary and primary component stress levels in check across the operating range.
Технические параметры
| Brand: | Texas Instruments |
| Development Kit: | UCC2891EVM |
| Duty Cycle - Max: | 74% |
| Factory Pack Quantity: Factory Pack Quantity: | 40 |
| Fall Time: | 14 ns |
| Input Voltage: | 18 V to 110 V |
| Manufacturer: | Texas Instruments |
| Maximum Operating Temperature: | +85 C |
| Minimum Operating Temperature: | -40 C |
| Mounting Style: | SMD/SMT |
| Number of Outputs: | 1 Output |
| Operating Supply Current: | 2 mA |
| Operating Supply Voltage: | 12 V |
| Output Current: | 2.5 A |
| Output Voltage: | 11.1 V |
| Package / Case: | SOIC-Narrow-16 |
| Packaging: | Tube |
| Product Category: | Switching Controllers |
| Product Type: | Switching Controllers |
| Rise Time: | 19 ns |
| Series: | UCC2891 |
| Subcategory: | PMIC-Power Management ICs |
| Switching Frequency: | 1 MHz |
| Topology: | Flyback, Forward |
| Type: | Current Mode PWM Controllers |
| Base Product Number | UCC2891 -> |
| Clock Sync | Yes |
| Control Features | Current Limit, Enable, On Time Control, Ramp, Soft |
| Duty Cycle (Max) | 70% |
| ECCN | EAR99 |
| Frequency - Switching | 250kHz |
| Function | Step-Up/Step-Down |
| HTSUS | 8542.39.0001 |
| Manufacturer Product Page | http://www.ti.com/general/docs/suppproductinfo.tsp |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature | -40В°C ~ 85В°C (TA) |
| Output Configuration | Positive, Isolation Capable |
| Output Phases | 1 |
| Output Type | Transistor Driver |
| Package | Tube |
| Package / Case | 16-SOIC (0.154"", 3.90mm Width) |
| REACH Status | REACH Unaffected |
| RoHS Status | ROHS3 Compliant |
| Supplier Device Package | 16-SOIC |
| Synchronous Rectifier | No |
| Topology | Flyback, Forward Converter |
| Voltage - Supply (Vcc/Vdd) | 8.5V ~ 16V |
| Control Method | Current |
| Fall Time | 14ns |
| Maximum Duty Cycle | 73% |
| Maximum Operating Supply Voltage | 12 V |
| Maximum Operating Temperature | +105 °C |
| Maximum Switching Frequency | 1000 kHz |
| Minimum Operating Temperature | -40 °C |
| Output Current | 2 A |
| Package Type | SOIC |
| Pin Count | 16 |
| PWM Controller Type | Current Mode |
| Rise Time | 19ns |
| Width | 3.91mm |
| Вес, г | 0.14 |
