Si8285/86 Data Sheet
ISODrivers with System Safety Features
KEY 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.
Automotive Grade is available for certain part numbers. These products are built using
automotive-specific flows at all steps in the manufacturing process to ensure the robust-
ness and low defectivity required for automotive applications.
Industrial Applications
Safety Regulatory Approvals (Pending)
• IGBT/ MOSFET gate drives
• UL 1577 recognized
• Industrial and renewable energy inver-
• Up to 5000 V
RMS
for 1 minute
ters
• CSA component notice 5A approval
• AC, Brushless, and DC motor controls
• IEC 60950-1 (reinforced insulation)
and drives
• VDE certification conformity
• Variable speed motor control in consum-
• VDE0884 Part 10 (basic insulation)
er white goods
• CQC certification approval
• Isolated switch mode and UPS power
• GB4943.1 (reinforced insulation)
supplies
Automotive Applications
• Hybrid electric and electric vehicles
• Traction inverters
• Electric motor controllers
• Inductive chargers
• Enables use with IGBTs rated for 1200 V
V
CE
, 300 A I
C
• 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
• Automotive-grade OPNs available
• AIAG compliant PPAP documentation
support
• IMDS and CAMDS listing support
• AEC-Q100 Qualified
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Rev. 1.0
Si8285/86 Data Sheet
Ordering Guide
1. Ordering Guide
Table 1.1. Si8285, Si8286 Ordering Guide
New Ordering Part
Number (OPN)
Ordering Options
Output
Configuration
Available Now
Si8285BC-IS
Si8285CC-IS
Si8286BC-IS
Si8286CC-IS
Sample Now
Si8285BD-IS
Si8285CD-IS
Si8286BD-IS
Si8286CD-IS
4.0 A driver
4.0 A driver
4.0 A driver
4.0 A driver
—
—
HCPL-316J
HCPL-316J
9V
12 V
9V
12 V
5.0 kVrms
5.0 kVrms
5.0 kVrms
5.0 kVrms
WB SOIC-16
WB SOIC-16
WB SOIC-16
WB SOIC-16
4.0 A driver
4.0 A driver
4.0 A driver
4.0 A driver
—
—
HCPL-316J
HCPL-316J
9V
12 V
9V
12 V
3.75 kVrms
3.75 kVrms
3.75 kVrms
3.75 kVrms
WB SOIC-16
WB SOIC-16
WB SOIC-16
WB SOIC-16
Pin Compatibility
UVLO Voltage
Insulation Rating
Package Type
Note:
1. Visit
www.silabs.com
for detailed quality data.
2. “Si” and “SI” are used interchangeably.
3. AEC-Q100 qualified.
4. Add an "R" at the end of the Part Number to denote Tape and Reel option.
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Si8285/86 Data Sheet
Ordering Guide
1.1 Automotive Grade OPNs
Automotive-grade devices are built using automotive-specific flows at all steps in the manufacturing process to ensure robustness and
low defectivity. These devices are supported with AIAG-compliant Production Part Approval Process (PPAP) documentation, and fea-
ture International Material Data System (IMDS) and China Automotive Material Data System (CAMDS) listing. Qualifications are compli-
ant with AEC-Q100, and a zero-defect methodology is maintained throughout definition, design, evaluation, qualification, and mass pro-
duction steps.
Table 1.2. Ordering Guide for Automotive Grade OPNs
New Ordering Part
Number (OPN)
Ordering Options
Output
Configuration
Available Now
SI8285CC-AS
SI8286CC-AS
Sample Now
SI8285CD-AS
SI8286CD-AS
4.0 A driver
4.0 A driver
—
HCPL-316J
12 V
12 V
5.0 kVrms
5.0 kVrms
WB SOIC-16
WB SOIC-16
4.0 A driver
4.0 A driver
—
HCPL-316J
12 V
12 V
3.75 kVrms
3.75 kVrms
WB SOIC-16
WB SOIC-16
Pin Compatibility
UVLO Voltage
Insulation Rating
Package Type
Note:
1. All packages are RoHS-compliant.
2. “Si” and “SI” are used interchangeably.
3. An "R" at the end of the part number denotes tape and reel packaging option.
4. Automotive-Grade devices (with an "–A" suffix) are identical in construction materials, topside marking, and electrical parameters
to their Industrial-Grade (with a "–I" suffix) version counterparts. Automotive-Grade products are produced utilizing full automotive
process flows and additional statistical process controls throughout the manufacturing flow. The Automotive-Grade part number is
included on shipping labels.
5. Additional Ordering Part Numbers may be available in Automotive-Grade. Please contact your local Silicon Labs sales represen-
tative for further information.
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Rev. 1.0 | 3
Table of Contents
1. Ordering Guide
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. 3
1.1 Automotive Grade OPNs .
2. System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Isolation Channel Description
2.2 Device Behavior .
2.3 Input .
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2.4 Output .
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. 5
. 6
. 7
. 7
. 8
. 8
. 8
. 9
. 9
. 9
. 9
2.5 Desaturation Detection .
2.6 Soft Shutdown.
2.7 Fault (FLTb) Pin .
2.8 Reset (RSTb) Pin.
2.9 Undervoltage Lockout (UVLO) .
2.11 Miller Clamp .
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2.10 Ready (RDY) Pin (Si8285 Only) .
3. Applications Information . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 Recommended Application Circuits.
3.1.1 Power . . . . . . . .
3.1.2 Inputs . . . . . . . .
3.1.3 Reset, RDY, and Fault . . .
3.1.4 Desaturation . . . . . .
3.1.5 Driver Outputs. . . . . .
3.2 Layout Considerations .
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3.3 Power Dissipation Considerations .
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.10
.11
.11
.12
.12
.12
.12
.13
4. Electrical Specifications
4.1 Timing Diagrams .
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.20
.21
.24
4.2 Typical Operating Characteristics .
4.3 Regulatory Information .
5. Pin Descriptions
6. Packaging
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
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.28
.30
.31
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6.1 Package Outline: 16-Pin Wide Body SOIC .
6.2 Land Pattern: 16-Pin Wide Body SOIC
6.3 Top Marking: 16-Pin Wide Body SOIC.
7. Revision History
7.1 Revision 0.6
7.2 Revision 1.0
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.32
.32
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Rev. 1.0 | 4
Si8285/86 Data Sheet
System Overview
2. System Overview
2.1 Isolation Channel Description
The operation of a Si8285 or Si8286 channel is analogous to that of an optocoupler and gate driver, except an RF carrier is modulated
instead of light. This simple architecture provides a robust isolated data path and requires no special considerations or initialization at
start-up. A simplified block diagram for a single Si828x channel is shown in the figure below.
Transmitter
RF
OSCILLATOR
Receiver
V
DD
Semiconductor-
Based Isolation
Barrier
DEMODULATOR
+
NOISE FILTER
A
Input
Logic
V
H
V
L
Gnd
MODULATOR
Figure 2.1. Simplified Channel Diagram
A channel consists of an RF Transmitter and RF Receiver separated by a semiconductor-based isolation barrier. Referring to the
Transmitter, input A modulates the carrier provided by an RF oscillator using on/off keying. The Receiver contains a demodulator that
decodes the input state according to its RF energy content and applies the result to output B via the output driver. This RF on/off keying
scheme is superior to pulse code schemes as it provides best-in-class noise immunity, low power consumption, and better immunity to
magnetic fields.
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