Si8285/86 Data Sheet

4.0 Amp ISODrivers with System Safety Features

The Si828x (Si8285 and Si8286) are isolated, high current gate drivers with integrated

system safety and feedback function. The devices are ideal for driving power MOSFETs

and IGBTs used in a wide variety of inverter and motor control applications. The Si8285

and Si8286 isolated gate drivers utilize Silicon Labs' proprietary silicon isolation technol-

ogy, supporting up to 5.0 kVrms withstand voltage per UL1577. This technology enables

higher-performance, reduced variation with temperature and age, tighter part-to-part

matching, and superior common-mode rejection compared to other isolated gate driver

technologies.

The input to the device is a complementary digital input that can be utilized in several

configurations. The input side of the isolation also has several control and feedback digi-

tal signals. The controller to the device receives information about the driver side power

state (Si8285) and fault state of the device and recovers the device from fault through an

active-low reset pin.

On the output side, the Si8285 provides separate pull-up and pull-down pins for the gate.

The Si8286 has a single pin for both functions. A dedicated DSAT pin detects the desa-

turation condition and immediately shuts down the driver in a controlled manner. The

Si8285 device also integrates a Miller clamp to facilitate a strong turn-off of the power

switch.

Applications

• IGBT/ MOSFET gate drives

• Industrial, HEV, and renewable energy inverters

• AC, Brushless, and DC motor controls and drives

• Variable speed motor control in consumer white goods

• Isolated switch mode and UPS power supplies

KEY FEATURES

• 4 A IGBT driver

• System Safety Features

• DESAT detection

• FAULT feedback

• Undervoltage Lock Out (UVLO)

• Soft shutdown on fault condition

• Silicon Labs’ high-performance isolation

technology

• Industry leading noise immunity

• High speed, low latency and skew

• Best reliability available

• 30 V driver-side supply voltage

• Integrated Miller clamp (Si8285 only)

• Power ready pin (Si8285 only)

• Complementary driver control input

• Si8286 pin-out compatible with HCPL-316J

• Compact package: 16-pin wide-body SOIC

• Industrial temperature range: –40 to 125°C

Safety Regulatory Approvals (Pending)

• UL 1577 recognized

• CSA component notice 5A approval

• IEC 60950-1 (reinforced insulation)

• VDE certification conformity

• VDE0884 Part 10 (reinforced insulation)

• CQC certification approval

• GB4943.1 (reinforced insulation)

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Preliminary Rev. 0.6

This information applies to a product under development. Its characteristics and specifications are subject to change without notice.