SCALE-2 ASIC 芯片组
SCALE-2 ASIC 芯片组
CONCEPT SCALE™-2 IGBT驱动器利用ASIC芯片组来降低元件数量和尺寸，同时提高性能、可扩展性和可靠性。利用芯片组，设计师可优化动态切换性能、精度和功能，实现灵活的设计并缩短上市时间。
SCALE-2芯片组 – CONCEPT的IGBT和功率MOSFET门极驱动器的下一代技术 – 针对IGBT以及150A到3600A和600V到6500V的应用优化，但是也可预配置以促进应用特有的设计。ASICS在汽车级BiCMOS晶圆工艺线上制造，确保其高度可靠。
CONCEPT’s SCALE-2 IGBT-drivers couple ASIC technology with a proprietary transformer design enabling the company to provide UL Certification across its entire product range.
A bidirectional transformer interface transmits both command and fault signals via short single pulses to achieve minimum command delay. In case of a signal collision, the fault signal dominates both the command signal and dv/dt induced noise currents by means of a longer pulse duration. The asynchronous fault transfer method also allows the special timing requirements of parallel-connected IGBTs or multi-level converter topologies to be managed, since any fault condition will be apparent at the primary side in less than one microsecond. A preferred fault-management mode reports the fault event in advance of a turn-off of the relevant IGBTs. The delay period before shutdown can be adjusted within the IGD ASIC. For transformer coupled drivers, (see Fig. 3) delays of less than 80ns and ±1ns jitter can be achieved.
Direct Mode allows both driver channels to be independently driven. This mode offers the highest levels of customer flexibility and is therefore preferred for advanced microcontroller-assisted systems. In half-bridge mode, the ASIC uses only one input as a common command signal and generates two (non-inverted and inverted) outputs. The mode and dead time are adjustable to the needs of the particular application via a single resistor. A third mode is pre-configured to implement interlock or mutual exclusion upon customer request.
On the primary side, any fault state may be stretched by a Blocking Time. During this period, the relevant channel is kept in the off-state. This time is adjustable using a single resistor and can also be set to a minimum of 10μs.
CONCEPT's proprietary SCALE-2 chipset serves as a core technology for implementing the next generation of IGBT driver series. Fig. 4 shows a simplified schematic diagram of a Plug-and-Play IGBT driver for high-voltage IGBT modules up to 6500V with an Advanced Active Clamping function. The driver achieves gate levels of 40A, 6W by using external n-type DMOS elements for both the gate drive and DC/DC converter output stages. The overall component count is reduced by more than 60% compared to the previous SCALE driver chipset and by significantly more when compared to traditional discrete designs.