Silicon Labs, NASDAQ: SLABs, launched a new type of isolated drive series to meet the key needs of the most cutting-edge power system. Based on Silicon Labs, the new Si827X IsoDriver series provides the highest immunity in the Isolated Drive Market. This industry-leading common mode transient suppression capability (CMTI) makes the Si827X drive very suitable for power systems with rapid switches and potential noise. Target applications include power supplies, solar inverters, and micro-inverters, D-class amplifiers, motor controllers, electric / hybrid vehicles (EV / HEV) chargers, etc.
For power designers, the most important power indicators are unit volume power (W / mm3). In order to maximize power density, many designers choose faster switching frequencies for their design. The power supply system uses high power semiconductor switches, such as silicon-based MOSFETs and MOSFETs based on novel gallium nitride (GaN) and silicon carbide (SiC), requires high current isolation drivers to control the switch. The quick switch increases system efficiency, but also produces higher transient noise, which may cause signal loss or permanent damage due to latch. The Si827X gate driver provides excellent antibiotics to transient noise caused by high speed switches, thereby efficiently protecting power systems.
The Si827X gate driver provides industry-leading antibiotics (200kv / μs) and latch inhibitory capabilities (400kV / μs), which is twice the current other gate driver immunity. With its industry-leading high-performance antibiotics, Si827x series products eliminate the risk of using faster switching speeds, preventing modulation loss and latch, which are the most important security issues. The Si827x series is extremely highly reliable, which effectively prevents permanent latch damage of the gate driver.
Si827x Series provides a single or dual isolation gate driver for power converter applications, which can be controlled by two independent input controls or one input control. The gate driver can be powered by a width VDD voltage range of 2.5-5.5V, and the maximum drive 30V supply voltage is driven. The lower 2.5V VDDI voltage enables the developer to use low voltage power to reduce system design, reducing energy consumption, increasing system efficiency, and having a low voltage power supply microcontroller (MCU), such as Silicon Labs EFM32 Gecko MCU.
The Si827X gate driver has an en (High level effective enable) pin and atypical DIS (low level effective) pin, also has an undervoltage locking (UVLO) fault protection for filtering the noise input Function, high precision dead time (DT pin) programmable. Using DT features, developers can accurately control "dead time" between two switch drivers to optimize power system efficiency and security.
Ross Sabolcik, vice president of Silicon Labs, said: "Silicon Labs New Si827x Gate Drive Series Solved customer problems in the real world, making fast switches safer, support low voltage 2.5V operation, and has excellent timing performance. Si827x The gate driver is first-class immunity to allow developers to secure the power system with a fast switch MOSFET or a faster GaN and SiC switch, which significantly improves the overall efficiency of the system while enhancing reliability. "
With Silicon Labs patented capacitive coupling technology, Si827X gate driver provides extremely low electromagnetic interference (EMI) radiation, longer service life, fast and accurate timing performance, and -40 ° C to + 125 ° C wide temperature range.
Si827X isolation gate driver series product characteristics
The industry's highest immunity (200kV / μs) and latch immunity (400kV / μs) support super fast switches.
The only gate driver that can be operated at a low to 2.5V VDD supply voltage reduces power consumption.
First-class timing performance (typically 30 ns delay), the propagation delay is 10 times shorter than other gate drivers, 20 times lower than the bias.
Use the EN pin instead of the DIS pin to ensure security default status.
Precise timing (including dead time control) maximize system efficiency and security.
A durable and reliable solution that is stable in a long service life, with a service life of 60 years, or 10 times longer than the useful life of the photocoupless solution.
Price and availability
The Si827x isolation gate driver has been produced and a sample can be provided with a narrow-body SOIC and a compact 5mm × 5 mm LGA package. Si827X is a single price of $ 1.19 at 10,000 pieces. To simplify application development, Silicon Labs provides Si8273ISO-KIT, SI8274ISO-KIT and SI8275ISO-KIT evaluation kit for Si827X series, with a price of $ 29.00.
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