Overview
The L6491D, produced by STMicroelectronics, is a high-voltage, single-chip half-bridge gate driver designed for N-channel power MOSFET or IGBT applications. Manufactured using the BCD6 “OFF-LINE” technology, this device is capable of handling high voltage rails up to 600 V. The logic inputs are CMOS/TTL compatible, supporting voltages down to 3.3 V, which facilitates easy interfacing with microcontrollers or DSPs. The L6491D integrates various features such as an integrated bootstrap diode, a comparator for fault protection, smart shutdown function, and adjustable deadtime, making it a versatile and reliable component for various industrial and power management applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| High 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 with hysteresis | V |
| Package | SO-14 | |
| Operating Temperature | -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 voltage rail the L6491D can handle?
The L6491D can handle a high voltage rail up to 600 V.
- What is the driver current capability of the L6491D?
The driver current capability is 4 A source/sink.
- What are the switching times of the L6491D with a 1 nF load?
The switching times are 15 ns rise/fall with a 1 nF load.
- What type of logic inputs does the L6491D support?
The L6491D supports 3.3 V, 5 V TTL/CMOS inputs with hysteresis.
- Does the L6491D have integrated fault protection features?
Yes, it includes a comparator for fault protections and a smart shutdown function.
- What is the operating temperature range of the L6491D?
The operating temperature range is -40 to 125 °C.
- What package type is the L6491D available in?
The L6491D is available in an SO-14 package.
- What are some common applications of the L6491D?
Common applications include motor drivers, HID ballasts, power supply units, induction heating, wireless chargers, industrial inverters, and UPS.
- Does the L6491D have adjustable deadtime and interlocking functions?
Yes, it features adjustable deadtime and an interlocking function.
- How does the L6491D simplify the design and layout?
The L6491D offers a compact and simplified layout, reducing the bill of materials and facilitating a flexible, easy, and fast design).
