Overview
The L6391DTR, produced by STMicroelectronics, is a high-voltage, single-chip half-bridge gate driver designed for N-channel power MOSFETs or IGBTs. Manufactured using BCD (Bipolar-CMOS-DMOS) “OFF-LINE” technology, this device is optimized for high-voltage applications, supporting a voltage rail up to 600 V. The L6391DTR features CMOS/TTL compatible logic inputs down to 3.3 V, making it easy to interface with microcontrollers or DSPs. It includes an integrated bootstrap diode, a comparator for fault protection, and a smart shutdown function, among other advanced features.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| High Voltage Rail | Up to 600 | V |
| dV/dt Immunity | ± 50 | V/nsec |
| Driver Current Capability | 290 mA (source), 430 mA (sink) | mA |
| Switching Times (rise/fall) | 75/35 nsec (with 1 nF load) | nsec |
| Logic Input Voltage | 3.3 V, 5 V TTL/CMOS with hysteresis | V |
| Bootstrap Voltage | -0.3 to 620 | V |
| Junction Temperature | -40 to 125 | °C |
| Deadtime Setting Range | 0.1 to 3.4 µs (depending on RDT and CL) | µs |
Key Features
- High voltage rail up to 600 V
- dV/dt immunity ± 50 V/nsec in full temperature range
- Driver current capability: 290 mA source, 430 mA sink
- Switching times: 75/35 nsec rise/fall with 1 nF load
- 3.3 V, 5 V TTL/CMOS inputs with hysteresis
- Integrated bootstrap diode
- Comparator for fault protections
- Smart shutdown function
- Adjustable deadtime
- Interlocking function
- Compact and simplified layout
- Bill of material reduction
- Effective fault protection
- Flexible, easy, and fast design
Applications
- Motor drivers for home appliances, factory automation, industrial drives, and fans
- HID ballasts
- Power supply units
Q & A
- What is the maximum voltage rail supported by the L6391DTR?
The L6391DTR supports a voltage rail up to 600 V.
- What are the driver current capabilities of the L6391DTR?
The device can source 290 mA and sink 430 mA.
- What are the switching times for the L6391DTR with a 1 nF load?
The switching times are 75 nsec for rise and 35 nsec for fall.
- What type of logic inputs does the L6391DTR support?
The device supports 3.3 V and 5 V TTL/CMOS inputs with hysteresis.
- Does the L6391DTR have integrated fault protection features?
Yes, it includes a comparator for fault protections and a smart shutdown function.
- How is the deadtime adjustable in the L6391DTR?
The deadtime is adjustable via the DT pin and an external resistor (RDT).
- What is the junction temperature range for the L6391DTR?
The junction temperature range is -40 to 125 °C.
- What are some common applications of the L6391DTR?
Common applications include motor drivers, HID ballasts, and power supply units.
- Does the L6391DTR have an integrated bootstrap diode?
Yes, it includes an integrated bootstrap diode.
- How does the smart shutdown function work in the L6391DTR?
The smart shutdown function allows immediate turn-off of the output gate driver in case of a fault, minimizing propagation delay.
