Texas Instruments TPS28226 8-Pin Sink Synchronous MOSFET Drivers
Texas Instruments TPS28226 8-Pin High-Frequency 4A Sink Synchronous MOSFET Drivers is optimized for a variety of high-current one and multi-phase DC-to-DC converters. The Texas Instruments TPS28226 MOSFET Drivers have a small-size and low EMI emissions, providing a high-efficiency solution. Efficiency is achieved by up to 8.8V gate drive voltage, 14ns adaptive dead-time control, 14ns propagation delays, and high-current 2A source with 4A sink drive capability. The 0.4Ω impedance for the lower gate driver holds the gate of power MOSFET below its threshold. This feature ensures no shoot-through current at high dV/dt phase node transitions. Charged by an internal diode, the bootstrap capacitor allows the use of N-channel MOSFETs in a half-bridge configuration.
Features
- Drives two N-Channel MOSFETs with 14ns adaptive dead time
- 4.5V up to 8.8V with best efficiency at 7V to 8V wide gate drive voltage
- 3V up to 27V wide power system train input voltage
- 2.0V up to 13.2V amplitude wide input PWM signals
- Capable to drive MOSFETs with ≥40A current per phase
- 14ns propagation delay and 10ns rise/fall time allow FSW – 2MHz high-frequency operation
- Low-side driver sink ON-Resistance (0.4Ω) prevents dV/dT related shoot-through current
- Capable to propagate
- 3-State PWM input for power stage shutdown
- Space saving enable (input) and Power Good (Output) signals on the same pin
- Thermal shutdown
- UVLO protection
- Internal bootstrap diode
- Economical SOIC-8 and thermally enhanced 3mm x 3mm DFN-8 packages
- High-performance replacement for popular 3-state input drivers
Applications
- Multi-phase DC-to-DC converters with analog or digital control
- Desktop and server VRMs and EVRDs
- Portable and notebook regulators
- Synchronous rectification for isolated power supplies
Block Diagram
Published: 2008-02-26
| Updated: 2022-03-11