text.skipToContent text.skipToNavigation


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

Inventory: 8,514

Download data sheet for UCC28089
  |   View additional information for UCC28089

Packaging information

Package | Pins SOIC (D) | 8
Operating temperature range (°C) S (-40 to 105)
Package qty | Carrier: 75 | TUBE
View more packaging information

Quality information

RoHS Yes
Lead finish / Ball material NIPDAU
MSL rating / Peak reflow Level-1-260C-UNLIM
Material content View
DPPM / MTBF / Fit rate View
Qualification summary View
Ongoing reliability monitoring View
Device marking View


  • Push-Pull Oscillator With Programmable Deadtime
  • High-Current Totem-Pole Dual Output Stage Drives Push-Pull Configuration with 1-A Sink and 0.5-A Source Capability
  • Can be Used in Push-Pull, Half-Bridge, or Full-Bridge Topologies
  • Oscillator Synchronization Output
  • Low Start-Up Current of 130 µA and 1.4-mA Typical Run Current
  • Over-Current Shutdown
  • Digitally Controlled Over-Current/Retry Feature
  • Undervoltage Lockout With Hysteresis
    • High Efficiency Cascaded Converters
    • Inverters
    • Electronic Ballasts
    • Uninterruptable Power Supplies (UPS)
    • AC or DC Links


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.

Qty Price
1-99 $2.15
100-249 $1.78
250-999 $1.28
1,000+ $0.96

Alternative carriers

Part number UCC28089DR
Package qty | Carrier 2,500 | LARGE T&R
Custom reel may be available
Inventory 16,154
Qty | Price (USD) 1ku | $0.80