L6388D half-bridge gate driver IC — high & low side, 600V, bootstrap, MOSFET/IGBT, SOP-16

The L6388D is a high-voltage half-bridge gate driver IC from STMicroelectronics, designed to drive both the high-side and low-side switches of a half-bridge, full-bridge, or three-phase inverter topology. It supports MOSFET and IGBT gate drive with a bootstrap high-side supply, making it suitable for motor drives, inverters, DC-DC converters, and power factor correction (PFC) stages operating up to 600V.

Available in the compact SOP-16 SMD package, the L6388D features independent high-side and low-side gate drive outputs, interlocking dead-time control to prevent shoot-through, and a wide operating temperature range — making it a reliable choice for both industrial and automotive power conversion designs.

Key Specifications:

• Part number: L6388D
• Topology: half-bridge gate driver (high-side + low-side)
• High-side supply voltage (V_B): up to 600V
• Gate drive output current: 400mA source / 650mA sink (typ.)
• Bootstrap diode: external (bootstrap capacitor required)
• Input logic: compatible with 3.3V and 5V logic
• Interlocking / dead-time: yes (prevents shoot-through)
• Under-voltage lockout (UVLO): yes (both high-side and low-side)
• Operating temperature: −40°C to +125°C
• Package: SOP-16 (SMD, 16-pin)

Key Features:

• 600V high-side capability — suitable for mains-connected inverter and motor drive topologies
• Bootstrap high-side supply — eliminates need for isolated high-side power supply
• Interlocking dead-time control — prevents simultaneous conduction (shoot-through) of high and low side switches
• UVLO on both channels — prevents gate drive under insufficient supply voltage
• 3.3V and 5V logic compatible inputs — interfaces directly with microcontrollers and DSPs
• SOP-16 SMD package — compact footprint for high-density power PCB designs

Applications:

• Half-bridge and full-bridge MOSFET/IGBT inverter gate drive
• Three-phase motor drive (with three L6388D ICs)
• DC-DC boost and buck-boost converter gate drive
• Power factor correction (PFC) stage gate drive
• Solar inverter switching stage
• UPS and industrial power conversion

Note: An external bootstrap diode and capacitor are required for high-side operation. Select bootstrap capacitor based on switching frequency and gate charge of the driven MOSFET/IGBT. Refer to the L6388D datasheet for bootstrap design guidelines, dead-time programming, and PCB layout recommendations.