LittelfuseLF2136BTRGate and Power Drivers

Overview

LF2136B is a three-phase gate driver IC designed for high voltage, high speed applications, driving N-channel MOSFETs and IGBTs in a half-bridge configuration. The high voltage process enables the LF2136B high sides to switch up to 600V in a bootstrap operation.

LF2136B logic inputs are compatible with standard TTL and CMOS levels (down to 3.3V) to interface easily with controlling devices and are enabled low to better function in high noise environments. The driver outputs feature high pulse current buffers designed for minimum driver cross conduction.

LF2136B offers numerous protection functions. A shoot-through protection logic prevents both outputs being high with both inputs low (fault state), an under-voltage lockout (UVLO) for VCC shuts down all drivers through an internal fault control, while a UVLO for VBS shuts down the respective high side output. Additionally, an overcurrent protection will terminate all six outputs. Both the VCC UVLO and the overcurrent protection activate an automatic fault clear with a timing that is adjustable with an external capacitor. LF2136B is offered in an SOIC-28 package and operates over an extended temperature range of -40 °C to +125 °C .

Features

• •  Three floating high-side drivers in bootstrap operation to 600V
• •  200mA source / 350mA sink output current capability
• •  Outputs tolerant to negative transients, dV/dt immune
• •  Wide VCC operating range: 10V to 20V
• •  Logic input 3.3V capability
• •  Internal deadtime of 290ns to protect MOSFETs
• •  Matched propagation delay for all channels
• •  Outputs out of phase with inputs
• •  Schmitt triggered logic inputs
• •  Cross conduction prevention logic
• •  Under Voltage Lockout (UVLO) for all channels  Overcurrent protection shuts down drivers

Applications

• •  3-Phase Motor Inverter Driver
• •  White Goods - Air Conditioner, Washing Machine, Refrigerator
• •  Industrial Motor Inverter - Power Tools, Robotics
• •  General Purpose 3-Phase Inverter