RT7021BGS

The RT7021BGS from Richtek is a 0.3A/0.6A, high/low side MOSFET driver in 8 pin SOP package. It is a high voltage gate driver IC with dual outputs. The IC, together with an external bootstrap network drives dual N-channel MOSFETs or IGBTs with input voltage rail up to 600V. The IC is equipped with a common mode dV/dt noise cancelling technique to provide high dV/dt immunity which enables stable operation under high dV/dt noise circumstances. Two under voltage lockout (UVLO) functions continuously monitor the bias voltages on VCC and BOOT to LX for preventing malfunction when the bias voltages are lower than the specified threshold voltages. The logic level of the PWM signal input pins are compatible with standard TTL logic level for ease of interfacing with controlling devices applications. It is typically used in PDP scan driver, fluorescent lamp ballast and SMPS applications.

• Floating channels designed for bootstrap operation with input voltage up to 600V
• 300mA/600mA sourcing/sinking current
• High dV/dt immunity of ±50V/nsec
• VCC and VBOOT, LX supply range from 13V to 20V
• Undervoltage lockout functions for both channels
• TTL compatible logic input
• Matched propagation delay below 20ns
• Outputs out of phase with input
• VCC quiescent current of 220µA and VCC operating current of 600µA
• Ambient temperature range from -40°C to 125°C

Applications

Motor Drive & Control