The UC3856DW is a high-performance current-mode Pulse Width Modulation (PWM) Controller intended for both design upgrades and new applications where speed and accuracy are important. All input to output delays have been minimized and the current sense output is slew rate limited to reduce noise sensitivity. Fast 1.5A peak output stages have been added to allow rapid switching of power FETs. A low impedance TTL compatible sync output has been implemented with a tri-state function when used as a sync input. This is in conjunction with the improved differential current sense amplifier results in enhanced noise immunity. Other features include a trimmed oscillator current (8%) for accurate frequency and dead time control.
● Improved current sense amplifier with reduced noise sensitivity
● Differential current sense with 3V common mode range
● Trimmed oscillator discharge current for accurate dead band control
● Accurate 1V Shutdown threshold
● TTL Compatible oscillator SYNC pin thresholds
● 1.5A Peak high current dual totem pole outputs
● 65ns Typical delay from shutdown to outputs
● 50ns Typical delay from sync to outputs
● Green product and no Sb/Br
