Overview
The LM5111-1MYX/NOPB is a dual 5-A compound gate driver produced by Texas Instruments. This device is designed to replace industry standard gate drivers with improved peak output current and efficiency. It features two independent and identical driver channels with TTL-compatible logic inputs and high-current totem-pole outputs. The outputs consist of a compound structure with MOS and bipolar transistors operating in parallel, which optimizes current capability over a wide output voltage and operating temperature range. This configuration reduces output current variation with voltage and temperature, making it highly reliable for various applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Operating Range | 3.5 | 14 | V | |
| VCC Under Voltage Lockout (rising) | 2.3 | 2.9 | 3.5 | V |
| VCC Under Voltage Lockout Hysteresis | 230 | mV | ||
| VCC Supply Current (ICC) | 1 | 2 | mA | |
| Logic High Input Voltage (VIH) | 2.2 | V | ||
| Logic Low Input Voltage (VIL) | 0.8 | V | ||
| Peak Sink Current | 5 | A | ||
| Propagation Delay Time Low to High | 25 | 40 | ns | |
| Rise Time | 14 | 25 | ns | |
| Fall Time | 12 | 25 | ns | |
| Operating Temperature Range | -40 | 125 | °C | |
| Junction-to-Ambient Thermal Resistance (θJA) | 50.7 | °C/W |
Key Features
- Compound CMOS and bipolar outputs to reduce output current variation.
- 5-A sink and 3-A source current capability.
- Fast rise and fall times (14 ns and 12 ns, respectively, with a 2-nF load).
- Available in dual non-inverting, dual inverting, and combination configurations.
- Supply rail undervoltage lockout protection (UVLO).
- LM5111-4 UVLO configured to drive PFET through OUT_A and NFET through OUT_B.
- Pin compatible with industry standard gate drivers.
- Independent TTL-compatible logic inputs.
- Thermally enhanced MSOP-PowerPAD package.
Applications
- Synchronous rectifier gate drivers.
- Switch-mode power supply gate drivers.
- Solenoid and motor drivers.
Q & A
- What is the peak sink current capability of the LM5111?
The LM5111 has a peak sink current capability of 5 A. - What are the typical rise and fall times of the LM5111 with a 2-nF load?
The typical rise time is 14 ns and the typical fall time is 12 ns. - What is the operating temperature range of the LM5111?
The operating temperature range is from -40°C to 125°C. - What is the purpose of the undervoltage lockout (UVLO) feature?
The UVLO feature disables the driver channels when the VCC to VEE voltage difference falls below a certain threshold, preventing operation during low voltage conditions. - How many configurations are available for the LM5111?
The LM5111 is available in dual non-inverting, dual inverting, and combination configurations. - Is the LM5111 pin compatible with other industry standard gate drivers?
Yes, the LM5111 is pin compatible with industry standard gate drivers such as the TC4426/27/28 and UCC27323/4/5. - What is the junction-to-ambient thermal resistance (θJA) for the MSOP-PowerPAD package?
The junction-to-ambient thermal resistance (θJA) for the MSOP-PowerPAD package is approximately 50.7 °C/W. - Can the two channels of the LM5111 be connected in parallel to increase drive current?
Yes, the two channels can be connected in parallel to double the drive current capability. - What is the logic input type of the LM5111?
The LM5111 has TTL-compatible logic inputs. - What package types are available for the LM5111?
The LM5111 is available in SOIC and thermally enhanced MSOP-PowerPAD packages.
