Texas Instruments TPS2813DR

TPS2813DR Texas Instruments Low-Side Gate Driver Product Summary

The Texas Instruments TPS2813DR is a dual high-speed low-side MOSFET gate driver housed in an 8-pin SOIC package. As a member of the TPS281x family, the TPS2813DR serves key roles in switching power supply designs and high-frequency MOSFET-driving applications, blending performance, flexibility, and robustness. Its versatility makes it suitable for engineers tasked with ensuring both reliable MOSFET operation and efficiency in tightly regulated electronic systems.

Key Attributes and Functionalities of the TPS2813DR

The TPS2813DR distinguishes itself with several essential attributes:

Dual Channel Configuration: Offers both one inverting and one non-inverting output, facilitating flexible MOSFET control topologies.

High Peak Drive Current: Each driver is capable of sourcing 2 A and sinking up to 1.9 A (with VCC = 14 V), ensuring the capability to drive even large MOSFETs with low gate charge requirements.

Ultra-Fast Response: Maximum rise and fall times of 25 ns and maximum propagation delay of 40 ns (1 nF load, VCC = 14 V), suitable for high-frequency operation.

Broad Operating Supply Range: Operates from 4 V to 14 V; an integrated linear regulator extends gate-drive operation up to 40 V input voltages, enhancing the device’s applicability in automotive and industrial environments.

Low Quiescent Current: Draws only 5 μA (typical) supply current with either input high or low.

Rugged Temperature Endurance: Supports an ambient operating range from –40°C to +125°C, enabling reliable deployment in demanding environments.

CMOS/TTL Logic Compatible Inputs: Makes integration with common logic controllers straightforward.

Integrated Regulator: Provides regulated driver supply (10–13 V) from high input rails, and can bias other circuits as long as package dissipation is not exceeded.

Device Structure and Functional Block Diagram Explanation

The TPS2813DR utilizes advanced mixed-signal design to minimize shoot-through current and maximize noise immunity. The architecture includes:

CMOS Input Stage: Features Schmitt-trigger action for superior noise immunity and a threshold set for typical logic compatibility.

Dual Output Stage: Each driver uses a hybrid output—combining a bipolar transistor with a MOSFET in parallel. This ensures rapid switching and “rail-to-rail” gate drive voltage, essential for fully turning on/off both low and high-threshold MOSFETs.

Integrated Linear Regulator: The TPS2813DR can internally regulate supply voltage for the driver even when powered from rails as high as 40 V. This regulator can supply up to 20 mA for auxiliary loads, but the thermal limitations of the SOIC package must be respected.

Channel Paralleling Capability: The two drivers within the package can be paralleled for increased gate drive capability, which is valuable in synchronous rectification and high-current gate drive scenarios.

TPS2813DR Electrical Specifications and Performance Metrics

For power electronics engineers, the electrical characteristics and switching performance are central to component selection:

Input Logic Thresholds: Positive and negative thresholds are approximately 2/3 VCC and 1/3 VCC, respectively, with input impedance in the GΩ region, minimizing loading on signal sources.

Output Drive Performance: Capable of delivering up to 2.1 A drive or 1.9 A sink (typical at 10 V VCC, 1 nF load). Output voltage swings fully between VCC and ground, supporting efficient switching and low gate losses.

Switching Times: Provides <30 ns propagation delay and <20 ns rise/fall times under standard test conditions, ensuring MOSFETs can be efficiently driven at high switching frequencies (>100 kHz).

Shoot-through Limiting: Shoot-through current is contained to <6 mA, reducing thermal stress and enhancing device reliability.

Regulator Output: 10–13 V with 0–20 mA sourcing capability from 14–40 V input rails when engaged.

ESD, Latch-Up, and Reliability: Designed to meet industry standards for robustness; device can operate in noisy industrial settings without concern for data latching or unintended switching.

TPS2813DR Application Recommendations in Power Electronics

The TPS2813DR is widely applicable in designs ranging from synchronous buck and boost power supplies to isolated gate-drive circuits and DC-DC converter stages. Key application guidelines include:

Decoupling: A 0.1 μF ceramic capacitor is recommended at VCC for supply bypassing. When utilizing the internal regulator, an additional 0.1 μF (ceramic) and a 4.7 μF (electrolytic) are recommended at the regulator output for transient stability.

Gate Drive Topologies: The hybrid output facilitates both rapid MOSFET turn-on/turn-off and full rail-to-rail gate drive, critical for minimizing switching losses, shoot-through, and cross-conduction in half-bridge and synchronous rectifier circuits.

Parallel Channel Drive: Both channels can be paralleled for improved current handling and rise/fall times when switching large MOSFETs or paralleled FETs. Channels external to the package should not be paralleled due to mismatch and tolerance concerns.

Integration in Synchronous Buck Converters: Demonstrated configurations pair the TPS2813DR (or its family members) with PWM controllers (e.g., TL5001) to deliver high efficiency (>90%) and high output currents (up to 5 A) at typical switching frequencies around 100 kHz.

EMI and PCB Layout: Keep driver-to-MOSFET trace lengths short and GND referenced to the source pin of the MOSFET to suppress parasitic inductance.

Thermal Management, Packaging, and PCB Design Aspects of the TPS2813DR

Package Choices: Available in SOIC-8, TSSOP-8, and PDIP-8, supporting standard SMT and through-hole assembly practices.

Thermal Performance: The SOIC and TSSOP are suitable for most PCB-based power applications, but care should be taken to avoid exceeding package-specific power dissipation limits, especially when leveraging the internal regulator.

Board Footprint: Follows established JEDEC outlines (SOIC: MS-012, TSSOP: MO-153, PDIP: MS-001), ensuring compatibility with automated assembly lines and common PCB design standards.

Stencil and Solder Paste: Adhere to IPC-7351 and IPC-7525 recommendations. Solder-mask and assembly guidelines are provided for robust surface mounting.

Alternative and Substitute Models Comparable to the TPS2813DR

Depending on the system topology and desired driver polarity, other devices in the TPS281x series may serve as alternatives:

TPS2811: Dual inverting drivers with similar drive and timing specs.

TPS2812: Dual non-inverting drivers; optimal when both outputs must follow input polarity.

TPS2814: Features AND gates with inverting input for each driver, offering flexible logic control.

TPS2815: Provides NAND logic on dual gate drivers, further expanding logic function in driver circuits.

When sourcing equivalents, it is crucial to match the desired input logic (inverting/non-inverting), required regulator capability, and permissible supply input. For some high-reliability and automotive applications, the TPS2811-Q1 is qualified to automotive standards.

Conclusion

: Selecting the TPS2813DR for Advanced Power Management Solutions

The Texas Instruments TPS2813DR stands out for power design engineers seeking robust, high-speed low-side gate drivers for advanced MOSFET control in switching regulators, DC-DC converters, and synchronous rectifier applications. Its blend of high output current, ultra-fast switching, extended supply range, and flexible polarity configuration suits complex switching architectures and demanding thermal environments. When making the critical decision for gate driver selection, the TPS2813DR offers an optimal mix of speed, reliability, and integration for modern power system challenges.