Smart gate driver photocoupler has automatic recovery

Protection features for the TLP5222 smart gate-driver photocoupler for MOSFETs and IGBTs include over-current protection with automatic recovery and fault-status indicator.

Toshiba’s TLP5222 smart gate-driver photocoupler has ±2.5A output current capability and continuously monitors the MOSFET drain source voltage (VDS) or IGBT collector emitter voltage (VCE). If an over-current occurs, the driver’s built-in protection circuitry detects the associated rise in VDS or VCE and gently turns off the MOSFET or IGBT. The driver’s automatic recovery function resumes normal operation, typically 25.5 microseconds (typical) after protective turn-off is triggered, to help simplify the design of the power stage controller. An isolated fault status pin indicates detection of the abnormal over-current.

In addition, the TLP5222 has an under-voltage lockout (UVLO) and an integrated active Miller clamping function that suppresses dV/dt-induced turn-on to prevent short-circuiting of upper and lower arms in a half bridge. These built-in features help simplify design and minimise external components, said Toshiba.

Housed in a SO16L package that ensures creepage and clearance distances of at least 8mm (minimum), the TLP5222 can be used in equipment requiring high insulation performance. The rated operating temperature range from -40 to +110 degrees C makes the driver suitable for applications that are deployed in harsh thermal environments such as photovoltaic (PV) power generation systems and uninterruptible power supplies (UPS).

The TLP5222 joins Toshiba’s exisiting TLP5212, TLP5214A and TLP5214 smart gate driver devices, which do not have automatic recovery and are reset by an external signal. Toshiba said the addition to the family gives engineers freedom to select the optimum device to meet an application’s requirements.

Toshiba Electronics Europe (TEE) is the European electronic components business of Toshiba Electronic Devices and Storage. TEE offers a variety of hard disk drive (HDD) products and semiconductors for automotive, industrial, IoT, motion control, telecoms, networking, consumer and white goods applications. The company’s portfolio also includes power semiconductors and other discrete devices ranging from diodes to logic ICs, optical semiconductors as well as microcontrollers and application specific standard products (ASSPs).

TEE has headquarters in Düsseldorf, Germany, with branch offices in France, Italy, Spain, Sweden and the United Kingdom providing marketing, sales and logistics services. 

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