UCC28781 Series
Automotive, high-density, zero-voltage switching (ZVS) flyback controller with integrated SR control
Manufacturer: Texas Instruments
Catalog(2 parts)
| Part | Embedded▲▼ | Utilized IC / Part | Primary Attributes | Function | Type | Supplied Contents | Supplier Device Package | Control Features | Voltage - Start Up▲▼ | Topology | Frequency - Switching▲▼ | Fault Protection | Voltage - Supply (Vcc/Vdd)▲▼ | Voltage - Supply (Vcc/Vdd)▲▼ | Operating Temperature▲▼ | Operating Temperature▲▼ | Output Isolation | Mounting Type | Package / Case |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
UCC28781-Q1 | 90VAC ~ 264VAC Input Voltage | Flyback Converter | Power Management | Board(s) | |||||||||||||||
Texas Instruments UCC28781ARTWRConverter Offline Flyback, Secondary Side SR Topology 500kHz 24-WQFN (4x4) | 24-WQFN (4x4) | Soft Start | 0.5 V | Flyback, Secondary Side SR | 500000 Hz | Current Limiting, Over Power, Over Temperature, Over Voltage, Short Circuit | 14 V | 34 V | -40 °C | 125 °C | Isolated | Surface Mount | 24-WFQFN Exposed Pad |
Key Features
• AEC-Q100 qualified for automotive applications:Temperature grade 1, TA: –40°C to 125°CDevice HBM ESD classification level 2Device CDM ESD classification level C2AFunctional Safety CapableDocumentation available to aid functional safety system designSwitching frequency: > 500 kHzEnables peak efficiency > 93 %Enables < 50 mW stand-by power (basic systems)Adaptive control for zero voltage switching (ZVS) and dead time optimizationEMI frequency dithering without trade-offs on transient response or audible noiseProgrammable adaptive burst mode (ABM) with internal compensationOver-temperature, overvoltage, output short-circuit, overcurrent, over-power, and pin-fault protectionsAuto-recovery fault-response4 mm × 4 mm, 24-pin, QFN packageAEC-Q100 qualified for automotive applications:Temperature grade 1, TA: –40°C to 125°CDevice HBM ESD classification level 2Device CDM ESD classification level C2AFunctional Safety CapableDocumentation available to aid functional safety system designSwitching frequency: > 500 kHzEnables peak efficiency > 93 %Enables < 50 mW stand-by power (basic systems)Adaptive control for zero voltage switching (ZVS) and dead time optimizationEMI frequency dithering without trade-offs on transient response or audible noiseProgrammable adaptive burst mode (ABM) with internal compensationOver-temperature, overvoltage, output short-circuit, overcurrent, over-power, and pin-fault protectionsAuto-recovery fault-response4 mm × 4 mm, 24-pin, QFN package
Description
AI
The UCC28781-Q1 is a zero-voltage-switching (ZVS) controller which can be used at very high switching frequencies to minimize the size of the transformer and enable high power density.
With direct synchronous rectifier (SR) control, the controller does not need a separate SR controller, as it can drive the SR FET directly to maximize efficiency and simplify design. (For isolated applications, an isolated gate-driver IC is required.)
Using adaptive dead-time control for ZVS, switching losses and EMI are minimized. This design results in a controller with extremely high conversion efficiency across the entire operating range.
The programmable adaptive burst mode (ABM) gives flexibility to control when the controller enters and exits standby mode to optimize standby power in light and no-load conditions. ABM also helps to reduce ripple and minimize audible noise.
The controller offers multiple protection modes with automatic restart (retry) responses.
The UCC28781-Q1 is a zero-voltage-switching (ZVS) controller which can be used at very high switching frequencies to minimize the size of the transformer and enable high power density.
With direct synchronous rectifier (SR) control, the controller does not need a separate SR controller, as it can drive the SR FET directly to maximize efficiency and simplify design. (For isolated applications, an isolated gate-driver IC is required.)
Using adaptive dead-time control for ZVS, switching losses and EMI are minimized. This design results in a controller with extremely high conversion efficiency across the entire operating range.
The programmable adaptive burst mode (ABM) gives flexibility to control when the controller enters and exits standby mode to optimize standby power in light and no-load conditions. ABM also helps to reduce ripple and minimize audible noise.
The controller offers multiple protection modes with automatic restart (retry) responses.