Overview
The UCC27425DR is a high-speed dual MOSFET driver from Texas Instruments, designed to deliver large peak currents into capacitive loads. This device is part of the UCC2742x family, which includes various logic options such as dual-inverting, dual-noninverting, and one-inverting and one-noninverting configurations. The UCC27425DR is available in an 8-pin SOIC (D) package and is known for its high current drive capability and unique bipolar and CMOS true drive output stage.
The device features enable functions for each driver, allowing better control over the operation of the driver applications. It also minimizes shoot-through current and provides efficient current sourcing and sinking at low supply voltages. The thermally enhanced MSOP PowerPAD™ package option improves long-term reliability by reducing thermal resistance.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (D) | - |
| Pins | 8 | - |
| Operating Temperature Range | -40 to 125 | °C |
| Supply Voltage | 4 to 15 | V |
| Output Current (DC) | ±4 A | A |
| Rise Time (CLOAD = 1.8 nF) | 20 to 40 ns | ns |
| Fall Time (CLOAD = 1.8 nF) | 15 to 40 ns | ns |
| Propagation Delay Time (IN rising) | 25 to 40 ns | ns |
| Propagation Delay Time (IN falling) | 35 to 50 ns | ns |
| Static Operating Current (VDD = 15 V) | 600 to 1350 μA | μA |
Key Features
- Industry-standard pin-out
- Enable functions for each driver
- High current drive capability of ±4 A
- Unique bipolar and CMOS true drive output stage provides high current at MOSFET Miller thresholds
- TTL/CMOS compatible inputs independent of supply voltage
- Dual outputs can be paralleled for higher drive current
- Available in thermally enhanced MSOP PowerPAD™ package
- Rated from –40°C to 125°C
- Efficient current sourcing and sinking at low supply voltages
- Minimizes shoot-through current during MOSFET switching transition
Applications
- Switch mode power supplies
- DC/DC converters
- Motor controllers
- Line drivers
- Class D switching amplifiers
Q & A
- What is the UCC27425DR used for?
The UCC27425DR is a high-speed dual MOSFET driver used to deliver large peak currents into capacitive loads, particularly in applications such as switch mode power supplies, DC/DC converters, motor controllers, line drivers, and Class D switching amplifiers.
- What are the key features of the UCC27425DR?
The key features include industry-standard pin-out, enable functions for each driver, high current drive capability of ±4 A, TTL/CMOS compatible inputs, and the ability to parallel outputs for higher drive current.
- What is the operating temperature range of the UCC27425DR?
The operating temperature range is from –40°C to 125°C.
- What is the supply voltage range for the UCC27425DR?
The supply voltage range is from 4 V to 15 V.
- How does the UCC27425DR minimize shoot-through current?
The device is designed to inherently minimize shoot-through current during the MOSFET switching transition.
- What are the typical rise and fall times of the UCC27425DR?
The typical rise time is 20 ns and the typical fall time is 15 ns with a 1.8 nF load.
- Can the outputs of the UCC27425DR be paralleled?
- What is the significance of the thermally enhanced MSOP PowerPAD™ package?
The thermally enhanced MSOP PowerPAD™ package drastically lowers the thermal resistance to improve long-term reliability.
- How do the enable functions work on the UCC27425DR?
The enable functions (ENBA and ENBB) are implemented on pins 1 and 8, internally pulled up to VDD for active high logic, and can be left open for standard operation.
- What should be done with unused input pins on the UCC27425DR?
Unused input pins (INA and INB) should be tied to either VDD or GND and should not be left floating.
