MP18851 2.8-5.5V Independent Dual-Channel Gate Driver SOIC

MP18851 2.8-5.5V Independent Dual-Channel Gate Driver SOIC

The MP18851 is an isolated, dual-channel gate driver solution with up to 4A of source and sink peak current capability.

Key Specifications

Features

• Up to 5kVRMS Input to Output Isolation (SOIC-16 WB Package)
• 1500VDC Functional Isolation between Two Secondary-Side Drivers (SOIC-16 NB and SOIC-16 WB Packages)
• 700VDC Functional Isolation between Two Secondary-Side Drivers (LGA-13 Package)
• Common-Mode Transient Immunity (CMTI) >100kV/µs
• 2.8V to 5.5V Input VDDI Voltage (VDDI) Range to Interface with TTL and CMOS- Compatible Inputs
• Up to 30V Output Drive Supply with Several Under-Voltage Lockout (UVLO) Options
• 4A Source, 4A Sink Peak Current Output
• 50ns Typical Propagation Delay
• -40°C to +125°C Operating Temperature Range
• UL 1577 Certified:

Typical Application Circuit

Applications

• Half/Full-Bridge Converters
• Isolated DC/DC Converters
• Offline Isolated AC/DC Converters

Design Notes

• The isolation rating is only valid if the PCB keeps the required creepage and clearance across the barrier — the package alone does not guarantee it.
• Common-mode transient immunity matters more than DC withstand in motor and gate-drive applications; check the dV/dt figure.
• Decouple both sides independently, with the capacitor returned to that side's ground.
• Propagation delay and pulse-width distortion set the timing margin in a closed loop.

Common Questions