1. Smart Gate Driver Optocoupler Update
Oct. 2012

2. Overview
Fairchild Semiconductor’s FOD8316, Smart Gate Driver Optocoupler, an advanced 2.5A Output Current IGBT Drive Optocoupler offers the critical protection necessary for preventing fault conditions that lead to destructive thermal runaway of IGBTs. Compatible with current IC solutions, the FOD8316 consists of an integrated gate drive optocoupler featuring low RDS(ON) CMOS transistors to drive the IGBT from rail-to-rail, and high-speed isolated feedback circuitry for fault sensing and is ideally suited for driving fast-switching power IGBTs and MOSFETs.

3. Smart Gate Driver Optocoupler, FOD8316
Features
Improved performance and Cost efficient equivalent to HCPL-316J; pin-to-pin compatible
Protection Circuits for Both Conventional and Sense IGBTs
Programmable Fault Sensing
Desaturation Detection
Soft IGBT turn-off
Undervoltage Lockout Optimized for IGBT’s
Output Voltage Swing Rail-to-Rail: low power dissipation
Negative Gate Drive Capability
Key Parameters
2.5A output current driving capability for most 1,200V/150A IGBT
High noise immunity characterized by CMR:
1,414Vpeak working insulation voltage and 8,000Vpeak transient isolation voltage rating

4. Optoplanar® SO-16 Package Package Construction & BOM
The FOD8316 offers best-in-class noise immunity resulting from its proprietary Optoplanar® coplanar packaging technology. The Optoplanar technology ensures safe insulation thickness of more than 0.4 millimeters in attaining reliable high-voltage isolation, certified by UL1577 and DIN EN/IEC standards.
Part
Material
LED 1
AlGaAs
LED 2
Input IC
Silicon
Output IC
Lead Frame
C194 FH with Ag spot plating & PI Tape
D/A Material
Ag-filled Epoxy
Bond Wire
Au, 1-mil ,
Silicone Domes 1 & 2
Silicone
White Mold
Compound
Non-Green EMC
Lead finish
Pure Sn plating

5. FOD8316 Functional Schematics
The application circuit and the timing diagram illustrate the functional use of the FOD8316 between a Micro Controller and a 3-phase system, and the interaction of the internal and external signals.
The internal gate driving circuitry of FOD8316 can be used with either a single positive power supply, VDD2, or a dual positive and negative supply, VDD2 and VSS. The output driver stage, VO, is made up of a pair of PMOS and NMOS transistors, which facilitates close to rail-to-rail output swing. This feature allows a tight control of gate voltage during on-state and short circuit condition. Due to the low RDS(ON) of the MOSFETs, the power dissipation is reduced as compared to those bipolar-type driver output stages. The absolute maximum rating of the output peak current, IO(PEAK) is 3A.

6. FOD8316 Functional Schematics
When the DESAT voltage increases above the threshold voltage, a short circuit condition is detected and the driver output stage will execute a “soft” IGBT turn-off and will be eventually driven low. The soft turn-off feature ensures the safe turn-off of the IGBT under fault condition. This reduces the voltage spike on the collector of the IGBT. Without this, the IGBT would see a heavy spike on the collector and hence resulting in a permanent damage to the device when it is turned off immediately. The FAULT open-drain output is triggered active low to report a desaturation error to the micro-controller. The FAULT signal is cleared by activating the RESET pin with an active low signal communicated by the external controller. The DESAT fault detector should be disabled for a short time period (blanking time) before the IGBT turns on to allow the collector voltage to fall below DESAT threshold. This blanking period protects against false trigger of the DESAT while the IGBT is turning on.

7. FOD8316 Evaluation Board (EVB)
The FOD8316 EVB with a booster circuit is designed for the evaluation of FOD8316 timing sequence and AC test performance, when driving IGBT power module. The user guide is recommended to be used in conjunction with the datasheet.

8. FOD8316 EVB Circuit Schematic

9. Applications Motor Drives Industrial Inverters Solar Power Inverters
Uninterruptible power supplies (UPS)
Induction Heating
Isolated IGBT Drive

10. Web Product Folder

11. Collaterals & Pricing FOD8316 Datasheet
Application Note titled “Optimizing IGBT Drive using Smart Gate Driver” (Work In Progress)
FOD8316 EVB User Guide (Work In Progress)
FOD8316 Reliability Report
FOD8316 Safety Certificates
Whitepaper titled “Comparison of Fairchild’s FOD8316 and Avago’s HCPL-316J, Optically Coupled IGBT Gate Driver.” for Internal Distribution
Pricing Guide

12. FOD3120, FOD3150 High Noise Immunity, 2. 5A/1
FOD3120, FOD3150 High Noise Immunity, 2.5A/1.0A Output Gate Driver Optocoupler
Benefits:
Capable of driving 800V/20A IGBT in industrial applications
High speed response to limit power dissipation during MOSFET switching
Enhance Fairchild’s comprehensive offering of power-optimized products to offer designers a total mW-to-kW solution
>8mm creepage and clearance distance (option T)
Features:
High output current capability:
- 2.5A for FOD3120, Vcc = 30V
- 1.0A for FOD3150, Vcc = 30V
Low Current Consumption, ICCH, ICCL
- FOD3120 – 3.8mA
- FOD3150 – 5.0mA
High speed response:
- FOD ns max. prop. delay
High common mode noise immunity (CMR) 35kV/us minimum allowing these devices to operate in noisy industrial environments
5000VACrms isolation voltage rating
Safety Agency Approvals: UL1577, and DIN_EN/IEC (VDE0884)
Target Markets:
Industrial - DC/DC Converter, SMPS, UPS, motor control inverter/servo, solar inverter
Consumer - plasma display panel

13. FOD3182, FOD3184 High Speed, 2.0A/3.0A Output Gate Driver Optocoupler
Features:
250kHz Max. Switching Speed
High Speed Switching
- 210ns max. prop. delay
- 65ns max. PWD
3A output current Vcc = 30V
Wide Vcc Operating Range Up to 30V
3.3mA, Low Current Consumption
8V (FOD3182), 12V (FOD3184)
High common mode noise immunity (CMR) 35kV/us minimum allowing these devices to operate in noisy industrial environments
Safety Agency Approvals: UL1577, 5kVACRMS and DIN_EN/IEC
1,414V peak working voltage
Benefits:
Capable of driving 800V/20A IGBT in industrial applications
High speed response to limit power dissipation during MOSFET switching
Enhance Fairchild’s comprehensive offering of power-optimized products to offer designers a total mW-to-kW solution
Target Markets:
High Performance UPS
High Speed Driving Power MOSFET/IGBT
Industrial Power Supply - DC/DC Converter, SMPS

14. FOD8320, High Noise Immunity, 2
FOD8320, High Noise Immunity, 2.5A Output Current, Gate Drive Optocoupler in Optoplanar® Wide Body SOP 5Pin
Features
Optoplanar® packaging technology allows more than 10mm Creepage and Clearance Distance, and 0.5mm insulation distance to achieve reliable and high voltage insulation
Safety and regulatory approvals
UL1577, 5,000VRMS for 1 min.
DIN-EN/IEC , 1,414Vpeak working voltage, 8,000Vpeak Transient isolation voltage rating
2.5A output current driving capability for medium power IGBT/MOSFET; Use of P-Channel MOSFETs at output stage enables output voltage swing close to the supply rail
35kV/μs Minimum Common Mode Rejection
Fast Switching Speed over full operating temperature range
400ns max. propagation delay
100ns max. pulse width distortion
UnderVoltage LockOut (UVLO) with hysteresis
Extended industrial temperate range, -40 to 100°C VO
VDD
VEE
CATHODE
ANODE 4 5 6 1 3

15. New Package Development: Wide Body 5-Pin SOP, Saving Board Space

16. FOD8321, 2.5A Output Current, Gate Drive Optocoupler in Optoplanar® Wide Body SOP 5Pin
Features
Optoplanar® packaging technology allows more than 8mm Creepage and Clearance Distance, and 0.5mm insulation distance to achieve reliable and high voltage insulation
Safety and regulatory approvals
UL1577, 5,000VRMS for 1 min.
DIN-EN/IEC , 1,414Vpeak working voltage, 8,000Vpeak Transient isolation voltage rating
2.5A output current driving capability for medium power IGBT/MOSFET; Use of P-Channel MOSFETs at output stage enables output voltage swing close to the supply rail
20kV/μs Minimum Common Mode Rejection
Fast Switching Speed over full operating temperature range
500ns max. propagation delay
300ns max. pulse width distortion
UnderVoltage LockOut (UVLO) with hysteresis
Extended industrial temperate range, -40 to 100°C VO
VDD
VEE
CATHODE
ANODE 4 5 6 1 3

17. New Package Development: Wide Body 5-Pin SOP, Saving Board Space

18. Smart Gate Driver Optocoupler with Active Miller Clamp, FOD8318
Features
Improved performance and Cost efficient equivalent to ACPL-33xJ
(not pin compatible), similar pinout to FOD8316 for easy upward integration
Active Miller Clamp to shut off the IGBT during high dv/dt without needing a negative supply voltage
Protection Circuits for Both Conventional and Sense IGBTs
Programmable Fault Sensing
Desaturation Detection
Undervoltage Lockout Optimized for IGBT’s
Negative Gate Drive Capability
Cost Effectively Drives Power MOSFETs and Bipolar Transistors
Safety and regulatory approvals
UL1577, 4,243VRMS for 1 min.
DIN-EN/IEC , 1,414Vpeak working voltage, 8,000Vpeak Transient isolation voltage rating
Advanced
Information
Final Sample Available
Target Release in 4Q12

19. Value Propositions
The gate driver optocouplers offer superior switching performance, lower power consumption and superior common mode transient immunity compared to competitive devices on the market.
Fairchild’s gate driver optocoupler family employs PMOS power transistor for the pull-up. Utilization of the PMOS transistor results in reduced power consumption within the optocoupler due to its ~1.5Ω RDS(ON). This compares to ~7.5Ω RDS(ON) for competitive products that utilize bipolar (triple darlington) pull-ups.
The newer, wide-body SO5, SO16, and DIP8 “T” packages provide wider (>10mm) clearance and (>8mm) creepage distances along with a working voltage (UIORM) of 1,414V peak and transient isolation voltage of 8,000V peak. These packages offer an equivalent to Avago’s HCNW wide body type of optocouplers.

20. Gate Driver Optocoupler Selection Table

21. Safety Agency Certification
UL 1577 approved
File #E90700, Volume 2
UL approval comes standard with all Fairchild optocouplers
VDE approved DIN_EN/IEC
File #
Order option ‘V’ for certification
FOD83xx approved to DIN_EN/IEC

22. twitter.com/fairchildSemi