The Industry's Smallest Automotive Gate Drivers with Built-in Isolator
Significantly reduces the size and power consumption of inverter circuits in EVs and HEVs


ROHM has recently announced the development of gate drivers with a built-in isolator ideal for IGBTs and power MOSFETs used in inverters in electric vehicles (EVs) and hybrid electric vehicles (HEVs).
The BM6103FV-C series utilizes proprietary BiCDMOS and on-chip transformer technologies to minimize size, resulting in the industry's smallest gate drivers with built-in isolator. In addition, power consumption is significantly reduced compared with conventional photocoupler systems, and all protection circuits required for EVs and HEVs are included, reducing design load for inverter systems. The BM6103FV-C series also supports high-speed SiC (Silicon Carbide) MOSFET switching for greater efficiency in next-generation power devices.
The emergence and proliferation of EVs and HEVs have increased the demand for smaller inverter circuits with improved characteristics and performance. This essentially entails reducing the size of the gate drivers (6) mounted within the inverter. However, multiple protection functions are required to provide the necessary to degree of safety for severe driving environments in automotive applications, along with external isolators (i.e. photocouplers) to protect against electric shocks. Protection against noises caused by high-speed switching from SiC devices, which are regarded as the successor to silicon as a next-generation semiconductor element, is also required.
In answer to these challenges ROHM succeeded in developing compact gate drivers that integrate an isolator through on-chip transformer and microfabrication processes. This not only eliminates the need for external components, but also reduces mounting area by approximately 50% compared with conventional products. In addition, all protection circuits required for automotive inverter circuits are built in, contributing to smaller inverters and design loads. And in order to provide protection against switching noise from SiC devices ROHM optimized circuit design based on testing with its own SiC devices and modules, resulting in the industry's only SiC-compatible gate drivers with built-in isolator.

*ROHM June 1 survey

<Key Features>

1)  Proprietary core-less transformer technology utilized for 2,500 Vrms isolator

2) Compact package
The SSOP-B20W (6.5mm x 8.1mm, t=2.01mm max.) package reduces a mounting area by over 50% compared with conventional package types.

3)Multiple protection functions provide a high level of safety
All protection circuits required for automotive applications are built in, including a mirror clamp function, fault output function, under-voltage lock-out function, thermal protection function, short-circuit protection function, and soft turn-OFF function.

4) Supports high-speed switching of SiC devices
Stable driving performance has been verified using ROHM's own SiC devices up to 800V/400A.


Availability:June 2012 (Samples), September 2012 (OEM quantities)
Pricing: 1000 yen/pc

- IGBT (Insulated Gate Bipolar Transistor) A bipolar transistor that incorporates a MOSFET at the gate.
- MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) The most common type of FET. Primarily used as switching elements.

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