Overview
The LM5112SD/NOPB, produced by Texas Instruments, is a high-speed, single-channel MOSFET gate driver designed for high-frequency applications. This device is available in a compact 6-pin WSON package or an 8-pin MSOP PowerPAD package, offering improved power dissipation. The LM5112SD/NOPB is AEC-Q100 Grade 1 qualified, making it suitable for automotive and other demanding environments. It features a compound output driver stage that combines MOS and bipolar transistors to optimize current capability over a wide range of output voltages and operating temperatures.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Voltage (VCC - IN_REF and VCC - VEE) | 3.5 | - | 14 | V |
| Undervoltage Lockout (UVLO) Rising | 2.4 | 3 | 3.5 | V |
| UVLO Hysteresis | - | 230 | - | mV |
| Supply Current (ICC) | - | 1 | 2 | mA |
| Logic High Threshold (VIH) | - | 2.3 | - | V |
| Logic Low Threshold (VIL) | - | 0.8 | - | V |
| Input Hysteresis | - | 400 | - | mV |
| Sink Current | - | 7 | - | A |
| Source Current | - | 3 | - | A |
| Propagation Time | - | 25 | - | ns |
| Rise and Fall Times (with 2-nF Load) | - | 14/12 | - | ns |
| Operating Temperature Range | -40 | - | 125 | °C |
Key Features
- High-peak gate drive current: 7-A sink and 3-A source current.
- Fast propagation times: 25 ns (typical) and fast rise and fall times: 14 ns or 12 ns with a 2-nF load.
- Inverting and non-inverting inputs for flexible gate drive configurations.
- Supply rail undervoltage lockout protection to prevent MOSFET damage.
- Dedicated input ground (IN_REF) for split supply or single supply operation.
- Power-enhanced 6-pin WSON package or thermally enhanced MSOP PowerPAD package.
- Output swings from VCC to VEE, which can be negative relative to the input ground.
Applications
- DC to DC switch-mode power supplies.
- AC to DC switch-mode power supplies.
- Solar microinverters.
- Solenoid and motor drives.
Q & A
- What is the operating voltage range of the LM5112SD/NOPB? The operating voltage range is from 3.5 V to 14 V between VCC and IN_REF or VCC and VEE.
- What is the undervoltage lockout (UVLO) threshold? The UVLO rising threshold is between 2.4 V and 3.5 V.
- What are the propagation times and rise/fall times of the LM5112SD/NOPB? The propagation time is 25 ns (typical), and the rise and fall times are 14 ns or 12 ns with a 2-nF load.
- Does the LM5112SD/NOPB support both inverting and non-inverting inputs? Yes, it supports both inverting and non-inverting inputs for flexible gate drive configurations.
- What is the purpose of the dedicated input ground (IN_REF) pin? The IN_REF pin is used for split supply or single supply operation, allowing the device to drive the MOSFET gate to a negative VGS voltage.
- What are the package options for the LM5112SD/NOPB? It is available in a 6-pin WSON package and an 8-pin MSOP PowerPAD package.
- What is the maximum sink and source current of the LM5112SD/NOPB? The maximum sink current is 7 A, and the maximum source current is 3 A.
- Is the LM5112SD/NOPB qualified for automotive applications? Yes, it is AEC-Q100 Grade 1 qualified.
- What is the operating temperature range of the LM5112SD/NOPB? The operating temperature range is from -40°C to 125°C.
- What types of applications can the LM5112SD/NOPB be used in? It can be used in DC to DC switch-mode power supplies, AC to DC switch-mode power supplies, solar microinverters, and solenoid and motor drives.
