Overview
The FAN7391MX, produced by onsemi, is a monolithic high- and low-side gate-drive IC designed to drive high-speed MOSFETs and IGBTs operating up to +600 V. This device features a buffered output stage with all NMOS transistors, ensuring high pulse current driving capability and minimal cross-conduction. The FAN7391MX incorporates advanced level-shift circuitry, common-mode noise-canceling techniques, and built-in under-voltage lockout (UVLO) to ensure stable and reliable operation under various noise conditions.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| High-Side Floating Supply Voltage (VB) | -0.3 | 625.0 | V | |
| Low-Side and Logic Fixed Supply Voltage (VDD) | -0.3 | 20 | V | |
| Logic Input Voltage (VIN) | VSS - 0.3 | VDD + 0.3 | V | |
| Output High, Short-Circuit Pulsed Current (IO+) | 3.5 | 4.5 | A | |
| Output Low, Short-Circuit Pulsed Current (IO-) | 3.5 | 4.5 | A | |
| Turn-On Propagation Delay (ton) | 150 | 220 | ns | |
| Turn-Off Propagation Delay (toff) | 150 | 220 | ns | |
| Junction Temperature (TJ) | +150 | °C |
Key Features
- Floating Channels for Bootstrap Operation up to +600 V
- Typically 4.5 A / 4.5 A Sourcing / Sinking Current Driving Capability
- Common-Mode dv/dt Noise-Canceling Circuit
- Built-in Under-Voltage Lockout for Both Channels
- Built-in Advanced Input Filter
- Matched Propagation Delay for Both Channels
- Logic (VSS) and Power (COM) Ground ±5 V Offset
- 3.3 V and 5 V Input Logic Compatible
- Output In-Phase with Input
- Pb-Free Device
Applications
- Plasma Display Panel (PDP) Sustain Driver
- High-Intensity Discharge (HID) Lamp Ballast
- Switching Mode Power Supply (SMPS)
- Motor Driver
- High-Power DC-DC Converter
Q & A
- What is the maximum operating voltage for the FAN7391MX?
The FAN7391MX can operate up to +600 V.
- What is the typical sourcing and sinking current capability of the FAN7391MX?
The device can source and sink typically 4.5 A of current.
- Does the FAN7391MX have built-in under-voltage lockout (UVLO)?
- What is the purpose of the advanced input filter in the FAN7391MX?
The advanced input filter provides protection against short-pulsed input signals caused by noise.
- Is the FAN7391MX compatible with 3.3 V and 5 V input logic?
- What are the recommended operating temperatures for the FAN7391MX?
The device can operate in temperatures ranging from -40°C to +125°C.
- How does the common-mode noise-canceling circuit benefit the FAN7391MX?
The common-mode noise-canceling circuit ensures stable operation of the high-side driver under high-dv/dt noise conditions.
- What is the significance of the matched propagation delay in the FAN7391MX?
The matched propagation delay ensures that both the high-side and low-side drivers have synchronized turn-on and turn-off times.
- What are some general guidelines for PCB layout when using the FAN7391MX?
Guidelines include direct tracks between switches, avoiding interconnect links, reducing lead-inductance, and minimizing noise coupling by proper placement of components and ground planes.
- Is the FAN7391MX a Pb-Free device?
