Silicon Labs recently introduced a new CMOS-based isolated field effect transistor (FET) driver family for industrial and automotive applications. The family enables you to use your preferred application-specific, high-volume FETs to replace old electromechanical relays (EMRs) and optocoupler-based, solid-state relays (SSRs).
The new Si875x family features the industry’s first isolated FET drivers designed to transfer power across an integrated CMOS isolation barrier. When paired with a discrete FET, the Si875x drivers provide a superb EMR/SSR replacement solution for motor and valve controllers, HVAC relays, battery monitoring, and a variety of other applications.
The Si875x isolated FET driver family’s features and specs:
- Industry’s first CMOS isolation-based SSR solution, supporting application-specific FETs
- Best-in-class noise immunity, high reliability and 2.5 kVRMS isolation rating
- Long lifetimes under high-voltage conditions (100 years at 1000 V)
- Efficient switching: 10.3 V at the gate with only 1 mA of input current
- Wide input voltage of 2.25 to 5.5 V enables power savings
- Unique pin feature optimizes power consumption/switching time trade-off
- Miller clamping prevents unintended turn on of external FET
- Small SOIC-8 package integrates isolation and power capacitors for low-power applications
- AEC-Q100-qualified automotive-grade device options
The Si875x devices come in a small SOIC-8 package. They are available in both industrial (–40°C to 105°C) or automotive (–40°C to 125°C) ambient temperature operating range options. Pricing in 10,000-unit quantities begins at $0.96 for industrial versions and $1.20 for automotive temperature options.
Evaluation kits are available. The Si8751-KIT (digital input) and Si8752-KIT (LED emulator input) evaluation kits cost $39.99 each.
Source: Silicon Labs