Overview
The FAN8811TMPX, produced by onsemi, is a high-frequency, high-side and low-side gate driver IC designed for driving high-voltage, high-speed MOSFETs operating up to 80 V. This IC integrates a driver IC and a bootstrap diode, making it suitable for various power conversion applications. It features low delay times and matched PWM input propagation delays, enhancing its performance in half-bridge or synchronous buck configurations. The device is TTL compatible and operates over a wide supply voltage range of 7.5 V to 16 V, with an absolute maximum of 18 V.
Key Specifications
| Parameter | Min. | Typ. | Max. | Units |
|---|---|---|---|---|
| VDD (Low-Side and Logic Fixed Supply Voltage) | -0.3 | 18 | V | |
| VHS (High-Side Floating Supply Offset Voltage) | -1 | 100 | V | |
| Output Current Capability (Source/Sink) | 3 A / 6 A | A | ||
| Rise/Fall Times (Typical, 1 nF Load) | 6 ns / 4 ns | ns | ||
| Propagation Delay Times (Typical) | 30 ns | ns | ||
| Delay Matching (Typical) | 2 ns | ns | ||
| Operating Junction Temperature Range | -40°C | 125°C | °C | |
| Quiescent Current (VDD, Typical) | 0.3 mA | mA | ||
| Operating Current (VDD, fSW = 500 kHz, Typical) | 3.0 mA | mA |
Key Features
- Drives two N-Channel MOSFETs in high-side and low-side configurations.
- Integrated bootstrap diode for high-side gate drive.
- Bootstrap supply voltage range up to 80 V.
- TTL compatible input thresholds.
- Wide supply voltage range of 7.5 V to 16 V (absolute maximum 18 V).
- Fast propagation delay times (typical 30 ns).
- Under-Voltage Lockout (UVLO) protection for drive voltage.
- Operating junction temperature range of -40°C to 125°C.
Applications
- Power supplies for telecom and datacom.
- Half-bridge and full-bridge converters.
- Synchronous-buck converters.
- Two-switch forward converters.
- Class-D audio amplifiers.
Q & A
- What is the maximum operating voltage for the FAN8811TMPX?
The FAN8811TMPX can operate with supply voltages up to 80 V for the high-side driver and up to 18 V for the low-side and logic supply. - What is the output current capability of the FAN8811TMPX?
The device can source 3 A and sink 6 A of current. - What are the typical rise and fall times for the FAN8811TMPX?
The typical rise and fall times are 6 ns and 4 ns, respectively, for a 1 nF load. - Is the FAN8811TMPX TTL compatible?
Yes, the FAN8811TMPX has TTL compatible input thresholds. - What is the operating junction temperature range of the FAN8811TMPX?
The operating junction temperature range is -40°C to 125°C. - Does the FAN8811TMPX have Under-Voltage Lockout (UVLO) protection?
Yes, the device includes UVLO protection for both the high-side and low-side drivers. - What types of converters can the FAN8811TMPX be used in?
The FAN8811TMPX can be used in half-bridge, full-bridge, synchronous-buck, and two-switch forward converters. - Is the FAN8811TMPX RoHS compliant?
Yes, the device is Pb-free, halogen-free/BFR-free and RoHS compliant. - How does the bootstrap diode function in the FAN8811TMPX?
The bootstrap diode generates the high-side bias by charging the bootstrap capacitor connected between the HB and HS pins. - What is the recommended layout practice for the FAN8811TMPX?
It is recommended to avoid driver input pulse signals close to the HS node and to use at least four or more vias for improved thermal performance.
