Mitsubishi PSS15S51F6 | High-Integration DIPIPM for Compact Motor Drives
The Mitsubishi PSS15S51F6 is a 6th generation DIPIPM™ (Dual-In-line Package Intelligent Power Module) engineered to streamline the design of low-power three-phase motor control systems. By integrating the power stage, gate drivers, and a comprehensive suite of protection circuits into a single compact package, this module radically simplifies the development process for engineers working on high-volume, cost-sensitive applications. It is an ideal solution for designers seeking to accelerate time-to-market while enhancing system reliability and efficiency.
Key Product Highlights:
- High-Level Integration: Combines six 300V/15A IGBTs, free-wheeling diodes, high-voltage ICs (HVICs), and low-voltage ICs (LVICs) in one package.
- Built-in Protection: Features on-board protection for short-circuit (SC), over-temperature (OT), and control supply under-voltage (UV), significantly improving system robustness.
- Optimized for Efficiency: Utilizes Mitsubishi's advanced CSTBT™ (Carrier Stored Trench-gate Bipolar Transistor) technology to achieve low saturation voltage and reduce overall power loss.
- Simplified Design: The integrated bootstrap diode and driver circuit eliminate the need for external optocouplers and a negative gate voltage supply, minimizing PCB footprint and component count.
Key Parameter Overview
The following table outlines the critical electrical characteristics of the Mitsubishi PSS15S51F6. For a complete set of specifications and application notes, you can download the official PSS15S51F6 datasheet.
| Parameter | Value |
|---|---|
| Collector-Emitter Voltage (Vces) | 300 V |
| Collector Current (Ic) | 15 A |
| Collector-Emitter Saturation Voltage (Vce(sat)) | Typ. 1.2V (at Ic = 15A, Tj = 25°C) |
| Maximum Junction Temperature (Tj(max)) | 150 °C |
| Isolation Voltage (Viso) | 1500 Vrms (for 1 minute) |
| Integrated Protection | Short-Circuit (SC), Over-Temperature (OT), Under-Voltage (UV) |
Technical Deep Dive: The DIPIPM Advantage
The core value of the PSS15S51F6 lies in its intelligent integration, which directly addresses common engineering challenges in motor drive design. By using an Intelligent Power Module (IPM), designers can bypass many of the complexities associated with discrete component layouts.
The module's internal HVIC provides level-shifting and gate drive power for the three high-side IGBTs, while the LVIC manages the three low-side IGBTs and consolidates all fault signals. This architecture eliminates the need for multiple optocouplers for isolation, shrinking the required PCB area and reducing susceptibility to common-mode noise. This high level of integration is crucial for preventing common failures and ensuring reliable operation over the product's lifetime.
Furthermore, the use of Mitsubishi’s proprietary CSTBT™ (Carrier Stored Trench-gate Bipolar Transistor) technology results in a lower on-state voltage (Vce(sat)) compared to previous generations. This translates directly to lower conduction losses, reducing the thermal load and simplifying thermal management, a critical factor in passively cooled or space-constrained applications.
Application Scenarios & Value Proposition
The PSS15S51F6 is specifically tailored for variable speed drives in applications up to approximately 750W. Its compact form factor and robust feature set deliver tangible benefits across several key areas:
- Home Appliances (Washing Machines, Refrigerators, Air Conditioners): In inverter-driven appliances, the module's high efficiency contributes to better energy star ratings. Its integrated protections safeguard the motor and electronics against locked-rotor or overload conditions, enhancing product longevity and reducing warranty claims.
- Small Industrial Motors & Pumps: For applications like fan and pump controls, the PSS15S51F6 provides a "plug-and-play" power stage. This accelerates the design cycle, allowing engineering teams to focus on control algorithms and system features rather than discrete power electronics design.
- Low-Power Servo Drives: The module’s quick and reliable fault detection is beneficial in entry-level servo applications where precise control and protection are paramount.
Frequently Asked Questions (FAQ)
Why choose an IPM like the PSS15S51F6 over designing with discrete IGBTs?
While a discrete design offers flexibility, an IPM provides significant system-level advantages. The primary benefits are reduced design time, lower assembly costs, and a much smaller PCB footprint. Most importantly, the protection circuits and gate drivers are co-packaged and optimized for the specific IGBTs in the module, guaranteeing performance and reliability that can be difficult and time-consuming to achieve with discrete components. For many projects, the discussion of whether integrated modules versus a discrete solution is better comes down to total cost of ownership and time-to-market, where the IPM often wins.
What is the benefit of the integrated bootstrap circuit?
The integrated high-speed bootstrap diode is a key cost and space-saving feature. It allows the high-side gate driver to be powered using a simple charge pump circuit connected to the low-side DC bus. This eliminates the need for three separate isolated power supplies for the high-side drivers, further reducing component count, cost, and design complexity. This makes the PSS15S51F6 a highly economical choice for cost-driven motor control applications.
For detailed design-in support or to discuss how the Mitsubishi PSS15S51F6 can fit into your next project, please contact our technical team.
