TDA21472 datasheet & price | pdf

TDA21472

If you’re working on server motherboards or high-end graphics cards, you’ll love the TDA21472 DrMOS power chip. It integrates both the driver and MOSFET into one package, simplifying your design significantly. With its impressive 70A current capacity, it’s perfect for powering demanding processors and GPUs. Plus, it has ultra-low losses, meaning higher efficiency and reduced cooling needs.

The TDA21472 also switches very quickly, allowing you to use smaller filter components and saving PCB space. It has robust built-in protections against short circuits, overheating, and overcurrent conditions, making your designs highly reliable. Its compact, thermally-efficient package is easy to handle even in dense circuit layouts. This chip truly shines in applications that demand high-quality and stable power delivery.

TDA21472 Pinout

When designing circuits with the TDA21472, here are a few quick tips: Separate your high-current PGND from the signal LGND to reduce noise interference. Put a 10–100 nF capacitor right next to the BOOT pin for stable MOSFET drive voltage. Control the chip using the EN pin—low means off, and around 3.3V means on—but check the allowed voltage range. Keep the SW node paths short and use thicker copper layers to boost efficiency. Remember, the thermal pad underneath needs proper cooling with PCB thermal vias. Finally, monitor the FLT and TEMP pins—they help detect overcurrent and overheating for better protection and easier troubleshooting.

TDA21472 Equivalent

If you’re considering alternatives to the TDA21472, here are a few options:

• TDA21462 (60A): This one is pin-compatible with the TDA21472 and can be swapped without changes to your design. However, it supports only 60A, so if your system is close to 70A, ensure it’s sufficient or consider a dual-phase setup.

• TDA21490 (90A): With a higher current rating, this one is perfect for high-demand applications (like GPU power supplies). But it’s larger and more expensive, so you’ll need to factor in thermal management and PCB layout.

• SiC634 (50A, Samsung): Although this DrMOS supports lower current, it uses a next-gen SiC MOSFET, offering better efficiency and lower on-resistance. If your load is under 50A, it’ll provide higher efficiency, but for higher loads, watch out for overheating and overload risks.

Summary Suggestion:
If you’re sticking with ≤70A, TDA21472 is the best choice; for lighter loads and cost-efficiency, TDA21462 works well; for higher current demands, TDA21490 is a strong replacement but watch thermal management; for efficiency and loads under 50A, SiC634 provides better performance but requires stability testing.

TDA21472 Power Stage Circuit Example

The TDA21472 chip is simple to use. The input voltage (VIN) is filtered and then converted into a stable output voltage (VOUT) via the chip’s PWM control. Inside, the MOSFETs switch based on the PWM signal, adjusting the current flow to keep the output voltage and load current stable. The OCSET pin sets the overcurrent protection threshold via an external resistor, automatically shutting down the circuit to protect against overloads. The output current sensing (IOUT) provides feedback to maintain current control.

Keep in mind that VCC and VDRV need a stable 5V voltage for the chip to work properly. The input voltage should be between 4.5V and 16V. Also, make sure to choose the right inductor (L1) to match your load requirements for efficient energy conversion.

TDA21472 Application

The TDA21472 is a high-performance power management chip designed for systems requiring efficient voltage regulation. It’s widely used in servers and high-performance computers to power CPUs, GPUs, and memory with stable, low-voltage power. It also supports multi-phase voltage regulation, improving system efficiency by reducing power loss.

With its high-frequency switching capability (up to 1.5 MHz), TDA21472 enables compact, fast-responding power designs. It’s perfect for mobile devices or embedded systems, offering low-power solutions and deep-sleep modes to save energy.

Additionally, it provides stable voltage for high-performance GPUs, ensuring system stability under heavy load. Built-in protections like overcurrent and overtemperature safeguards make it reliable for demanding power systems.