ISL89163FRTAZ-T

The ISL89163, ISL89164, and ISL89165 are high-speed, 6A, dual channel MOSFET drivers with enable inputs. Precision thresholds on all logic inputs allow the use of external RC circuits to generate accurate and stable time delays on both the main channel inputs, INA and INB, and the enable inputs, ENA and ENB. The precision delays capable of these precise logic thresholds make these parts valuable for dead time control and synchronous rectifiers. Note, the enable and input logic inputs can be interchanged for alternate logic implementations. Three input logic thresholds are available: 3.3V (CMOS), 5.0V (CMOS or TTL compatible), CMOS thresholds that are proportional to VDD. At high switching frequencies, these MOSFET drivers use a minimal amount of internal bias currents. Separate, non-overlapping drive circuits are used to drive each CMOS output FET to prevent shoot-through currents in the output stage. The start-up sequence is designed to prevent unexpected glitches when VDD is being turned on or turned off. When VDD < ~1V, an internal 10kΩ resistor between the output and ground helps to keep the output voltage low. When ~1V < VDD < UVLO: both outputs are driven low with significantly low resistance as the logic inputs are ignored, which ensures that the driven FETs are off. When VDD > UVLO, and after a short delay, the outputs begin to respond to the logic inputs.

Applications

• Synchronous Rectifier (SR) driver
• Switch mode power supplies
• Motor drives, Class D amplifiers, UPS, inverters
• Pulse transformer driver
• Clock/line driver

Key features

• Dual output, 6A peak currents, can be paralleled
• Dual AND-ed input logic, (input and enable)
• Typical ON-resistance < 1Ω
• Specified Miller plateau drive currents
• Very low thermal impedance (θJC = 3°C/W)
• Hysteretic Input logic levels for 3.3V CMOS, 5V CMOS, TTL, and Logic levels proportional to VDD
• Precision threshold inputs for time delays with external RC components
• 20ns rise and fall time driving a 10nF load.