UCC28089 Series

Primary-side push-pull Oscillator with Dead-Time control

Catalog

Primary-side push-pull Oscillator with Dead-Time control

Part	Function	Mounting Type	Package / Case	Package / Case [y]	Package / Case [x]	Clock Sync	Control Features	Output Type	Number of Outputs	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package	Output Configuration	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Synchronous Rectifier	Topology	Duty Cycle (Max) [Max]	Frequency - Switching [Max]	Output Phases
Texas Instruments UCC28089D	Step-Up/Step-Down	Surface Mount	8-SOIC	3.9 mm	0.154 in		Dead Time Control Frequency Control	Transistor Driver	2	105 °C	-40 °C	8-SOIC	Isolation Capable Positive	8.5 V	14 V		Push-Pull	50 %	1 MHz	1
Texas Instruments UCC28089DRG4	Step-Up/Step-Down	Surface Mount	8-SOIC	3.9 mm	0.154 in		Dead Time Control Frequency Control	Transistor Driver	2	105 °C	-40 °C	8-SOIC	Isolation Capable Positive	8.5 V	14 V		Push-Pull	50 %	1 MHz	1

Catalog

Primary-side push-pull Oscillator with Dead-Time control

Key Features

• Push-Pull Oscillator With Programmable DeadtimeHigh-Current Totem-Pole Dual Output Stage Drives Push-Pull Configuration with 1-A Sink and 0.5-A Source CapabilityCan be Used in Push-Pull, Half-Bridge, or Full-Bridge TopologiesOscillator Synchronization OutputLow Start-Up Current of 130 µA and 1.4-mA Typical Run CurrentOver-Current ShutdownDigitally Controlled Over-Current/Retry FeatureUndervoltage Lockout With HysteresisAPPLICATIONSHigh Efficiency Cascaded ConvertersInvertersElectronic BallastsUninterruptable Power Supplies (UPS)AC or DC LinksPush-Pull Oscillator With Programmable DeadtimeHigh-Current Totem-Pole Dual Output Stage Drives Push-Pull Configuration with 1-A Sink and 0.5-A Source CapabilityCan be Used in Push-Pull, Half-Bridge, or Full-Bridge TopologiesOscillator Synchronization OutputLow Start-Up Current of 130 µA and 1.4-mA Typical Run CurrentOver-Current ShutdownDigitally Controlled Over-Current/Retry FeatureUndervoltage Lockout With HysteresisAPPLICATIONSHigh Efficiency Cascaded ConvertersInvertersElectronic BallastsUninterruptable Power Supplies (UPS)AC or DC Links

Description

The UCC28089 is a versatile BiCMOS controller for dc-to-dc or off-line fixed-frequency switching power supplies. The UCC28089 has dual alternating output stages in dual-alternating push-pull configuration. Both outputs switch at half the oscillator frequency using a toggle flip-flop and duty cycle is limited to less than 50%. The UCC28089 is optimized for use as the primary-side companion controller for a cascaded converter that has secondary-side control. The device incorporates dead-time programming. The synchronization output also provides dead-time information. The retry and soft-start duration scales with the oscillator clock frequency for high performance fault recovery. The UCC28089 also provides primary side under-voltage protection (UVLO), and over-current protection. Both the soft start and retry after fault durations scale with oscillator frequency for high performance. The turn-on/off UVLO thresholds are 10.5 V/8.0 V. The UCC28089 is a versatile BiCMOS controller for dc-to-dc or off-line fixed-frequency switching power supplies. The UCC28089 has dual alternating output stages in dual-alternating push-pull configuration. Both outputs switch at half the oscillator frequency using a toggle flip-flop and duty cycle is limited to less than 50%. The UCC28089 is optimized for use as the primary-side companion controller for a cascaded converter that has secondary-side control. The device incorporates dead-time programming. The synchronization output also provides dead-time information. The retry and soft-start duration scales with the oscillator clock frequency for high performance fault recovery. The UCC28089 also provides primary side under-voltage protection (UVLO), and over-current protection. Both the soft start and retry after fault durations scale with oscillator frequency for high performance. The turn-on/off UVLO thresholds are 10.5 V/8.0 V.