Overview
The L6491DTR, produced by STMicroelectronics, is a high-voltage, single-chip half-bridge gate driver designed for N-channel power MOSFETs or IGBTs. It is manufactured using the BCD6 “OFF-LINE” technology, enabling it to handle high voltage rails up to 600 V. The device features CMOS/TTL compatible logic inputs down to 3.3 V, making it easy to interface with microcontrollers or DSPs. An integrated comparator provides fast protection against over-current, over-temperature, and other fault conditions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| High-side voltage rail | Up to 600 V | V |
| dV/dt immunity | ± 50 V/ns | V/ns |
| Driver current capability | 4 A source/sink | A |
| Switching times | 15 ns rise/fall with 1 nF load | ns |
| Logic input voltage | 3.3 V, 5 V TTL/CMOS | V |
| Package | SO-14 | |
| Operating temperature range | -40 to 125 °C | °C |
| Thermal resistance junction to ambient | 120 °C/W | °C/W |
Key Features
- High voltage rail up to 600 V
- dV/dt immunity ± 50 V/ns in full temperature range
- Driver current capability: 4 A source/sink
- Switching times 15 ns 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
- Induction heating
- Wireless chargers
- Industrial inverters
- UPS (Uninterruptible Power Supplies)
Q & A
- What is the maximum high-side voltage rail for the L6491DTR?
The maximum high-side voltage rail for the L6491DTR is up to 600 V.
- What is the dV/dt immunity of the L6491DTR?
The dV/dt immunity of the L6491DTR is ± 50 V/ns in the full temperature range.
- What is the driver current capability of the L6491DTR?
The driver current capability of the L6491DTR is 4 A source/sink.
- What are the switching times for the L6491DTR with a 1 nF load?
The switching times for the L6491DTR with a 1 nF load are 15 ns rise/fall.
- What are the compatible logic input voltages for the L6491DTR?
The L6491DTR has 3.3 V, 5 V TTL/CMOS compatible logic inputs.
- Does the L6491DTR have an integrated bootstrap diode?
- What protection features does the L6491DTR offer?
The L6491DTR offers a comparator for fault protections, smart shutdown function, and effective fault protection mechanisms.
- Can the deadtime be adjusted on the L6491DTR?
- What is the operating temperature range for the L6491DTR?
The operating temperature range for the L6491DTR is -40 to 125 °C.
- What are some common applications of the L6491DTR?
The L6491DTR is commonly used in motor drivers, HID ballasts, power supply units, induction heating, wireless chargers, industrial inverters, and UPS systems.
