2FSC0435+ Preliminary Datasheet 2FSC0435+ Absolute Maximum Ratings 2FSC0435+

Transcription

1 Preliminary Datasheet Features - Short circuit Detection with Soft shutdown - UVLO - Optical Transmission for Better EMC - Intelligent Faults Management System Typical Applications AC - General purpose drives - Solar and wind power converters - Electro/hybrid drive vehicles Auxiliary converters for traction TOP BOT - Industrial power supply - UPS Absolute Maximum Ratings Parameters Symbol Min Typ Max Unit Remarks Power supply V IN 16 V Gate peak current I GPEAK A Output power per Gate 5.5 W T A<85 Switching frequency f 50 khz Collector emitter voltage V CE 1.7 kv Collector emitter voltage across the IGBT Isolation test voltage V isol IO 5 kv Primary to secondary side V isol12 5 kv Secondary to secondary side Operating temperature T op Storage temperature T stg MOD,TB 3.6 V 1 / 9 sales01@firstack.com

2 Electrical Characteristics Power Symbol Min Typ Max Unit Remarks Supply current I I cc 0.12 A No load Coupling capacitance C io <10 pf Primary to secondary side Gate turn on voltage output V Gon 15 V Gate turn off voltage output V Goff -8 V Short Circuit Protection Parameters V CE threshold V REF_ SC 8.3 V Response time 8 us SSD time t SSD 4.5 us Timing Characteristics Turn on delay t don 850 ns Turn off delay t doff 880 ns Rise time t r 15 ns Fall time t f 186 ns Faults feedback time 10 ms Short circuit protection 20 ms Under voltage protection Faults blocking time 100 ms Dead time t d us Only half-bridge mode Electrical Isolation Test voltage(v acrms,50hz, 60S) Creepage distance 5 kv Primary to Secondary side 4 kv Secondary to Secondary side 18 mm Primary to secondary side 22 mm Secondary to secondary side 2 / 9 sales01@firstack.com

3 Clearance distance 18 mm Primary to secondary side 8 mm Secondary to secondary side Pin Destination Pin Label Remarks 1 VDC DC/DC converter supply 2 FO1 Fault output channel 1; normally high-impedance, pulled down to low on fault; open drain output 3 FO2 Fault output channel 2; normally high-impedance, pulled down to low on fault; open drain output 4 MOD Mode selection(direct/half-bridge mode) 5 TB Blocking time is fixed to 100 ms; Connect this pin with 71kΩ -181 kω resistor to GND 6 VCC Supply voltage; 15V supply for primary side 7 GND Ground 8 IN1 Signal input 1; non-inverting input relative to GND 9 IN2 Signal input 2; non-inverting input relative to GND 10 GND Ground 11 ACL1 Active clamping feedback channel 1; leave open if not used 12 VCE1 V CE sense channel 1; connect to IGBT collector through resistor network 13 REF1 Set V CE detection threshold channel 1; resistor to VE1 14 VEE1 Secondary side ground channel 1 15 VE1 Emitter channel 1; connect to (auxiliary) emitter of power switch 16 VISO1 DC/DC output channel 1 17 GH1 Gate high channel 1; pulls gate high through turn-on resistor 18 GL1 Gate low channel 1; pulls gate low through turn-off resistor 19 Free 20 Free 21 Free 22 ACL2 Active clamping feedback channel 2; leave open if not used 3 / 9 sales01@firstack.com

4 23 VCE2 V CE sense channel 2; connect to IGBT collector through resistor network 24 REF2 Set V CE detection threshold channel 2; resistor to VE2 25 VEE2 Secondary side ground channel 2 26 VE2 Emitter channel 2; connect to (auxiliary) emitter of power switch 27 VISO2 DC/DC output channel 2 28 CH2 Gate high channel 2; pulls gate high through turn-on resistor 29 GL2 Gate low channel 2; pulls gate low through turn-off resistor Mechanical Dimensions(unit:mm) 4 / 9 sales01@firstack.com

5 Recommended Interface Circuitry for the Primary Side Connector Both ground pins must be connected together with low parasitic inductance. A common ground plane or wide tracks are strongly recommended. The connecting distance between ground pins must be kept at a minimum. Recommended user interface of (primary side) Description of Primary Side Interface General The primary side interface of the driver is very simple and easy to use. The driver primary side is equipped with a 10-pin interface connector with the following terminals: - 2 x power-supply terminals - 2 x drive signal inputs - 2 x status outputs (fault returns) - 1 x mode selection input (half-bridge mode / direct mode) - 1 x input to set the blocking time All inputs and outputs are ESD-protected. VCC terminal The driver has one VCC terminal on the interface connector to supply the primary side electronics with 15V. VDC terminal 5 / 9 sales01@firstack.com

6 The driver has one VDC terminal on the interface connector to supply the DC-DC converters for the secondary sides. VDC should be supplied with 15V. It is recommended to connect the VCC and VDC terminals to a common 15V power supply. In this case the driver limits the inrush current at startup and no external current limitation of the voltage source for VDC is needed. MOD (mode selection) The MOD input allows the operating mode to be selected with a resistor connected to GND. Direct mode If the MOD input is connected to GND, direct mode is selected. In this mode, there is no interdependence between the two channels. Input IN1 directly influences channel 1 while IN2 influences channel 2. High level at an input (IN1 or IN2) always results in turn-on of the corresponding IGBT. In a half-bridge topology, this mode should be selected only when the dead times are generated by the control circuitry so that each IGBT receives its own drive signal. Caution: Synchronous or overlapping timing of both switches of a half-bridge basically shorts the DC-link. Half-bridge mode If the MOD input is connected to GND with a resistor 71k<R m<181k, half-bridge mode is selected. In this mode, the inputs IN1 and IN2 have the following functions: IN1 is the drive signal input while IN2 acts as the enable input. It is recommended to place a capacitor C m =22nF in parallel to R m in order to reduce the deviation between the dead times at the rising and falling edges of IN1 respectively. When input IN2 is low level, both channels are blocked. If it goes high, both channels are enabled and follow the signal on the input IN1. At the transition of IN1 from low to high, channel 2 turns off immediately and channel 1 turns on after a dead time T d. 6 / 9 sales01@firstack.com

7 FO1,FO2 (channel drive inputs,e.g. PWM) The outputs FOx have open-drain transistors. When no fault condition is detected, the outputs have high impedance. When a fault condition (primary side supply undervoltage, secondary side supply undervoltage, IGBT short-circuit or overcurrent) is detected, the corresponding status output FOx goes to low (connected to GND). Both FOx outputs can be connected together to provide a common fault signal. However, it is recommended to evaluate the status signals individually to allow fast and precise fault diagnosis. How the status information is processed A fault on the secondary side (detection of short-circuit of IGBT module or supply undervoltage) is transmitted to the corresponding FOx output immediately. The FOx output is automatically reset(returning to a high impedance state) after a blocking time t b has elapsed. Recommended Interface Circuitry for the Secondary Side Connectors Resistor Detect Diode Detect CH GL2 GH2 VISO2 VE2 VEE2 REF2 C22 4.7K 68K C12 RGOFF2 RGON2 15p D32 D42 D52 D62 Gate2 Emitter2 CH GL2 GH2 VISO2 VE2 VEE2 REF2 C22 4.7K 68K C12 RGOFF2 RGON2 D32 D42 D52 D62 20k Gate2 Emitter VCE2 ACL2 20R 120K RACL2 RVCE2 D12 D22 Collector VCE2 ACL2 20R RACL2 D12 D72 D22 Collector2 IGBT Driver GL1 GH1 4.7K RGOFF1 RGON1 CACL2 D51 Gate1 IGBT Driver GL1 GH1 4.7K RGOFF1 RGON1 CACL2 D51 Gate1 CH VISO1 VE1 VEE1 REF1 C21 68K C11 15p D31 D41 D61 Emitter1 CH VISO1 VE1 VEE1 REF1 C21 68K C11 D31 D41 D61 20k Emitter VCE1 ACL1 20R 120K RACL1 RVCE1 D11 D21 Collector VCE1 ACL1 20R RACL1 D11 D71 D21 Collector1 CACL1 CACL1 Description of Secondary Side Interfaces Each driver s secondary side (driver channel) is equipped with an 8-pin interface connector with the following 7 / 9 sales01@firstack.com

8 terminals (x stands for the number of the drive channel 1 or 2): - 1 x DC/DC output terminal VISOx - 1 x emitter terminal VEx - 1 x reference terminal REFx for overcurrent or short-circuit protection - 1x collector sense terminal VCEx - 1x active clamping terminal ACLx - 1x turn-on gate terminals GHx - 1x turn-off gate terminals GLx All inputs and outputs are ESD-protected. Reference terminal (REFx) The reference terminal REFx allows the threshold to be set for short-circuit and/or overcurrent protection with a resistor placed between REFx and VEx. A constant current of about 150µA is provided at pin REFx. Collector sense (VCEx) The collector sense must be connected to the IGBT collector or MOSFET drain with the circuit in order to detect an IGBT or MOSFET overcurrent or short-circuit. It is recommended to dimension the resistor value of R vcex in order to get a current of about 0.6-1mA flowing through R vcex (e.g MΩ for V DC-LINK=1200V). The current through R vcex must not exceed 1mA. It is possible to use a high-voltage resistor as well as series connected resistor. In any case, the min. creepage distance related to the application must be considered. The diode D 6x must be explicitly avoided. must have a very low leakage current and a blocking voltage of >40V (e.g. BAS416).Schottky diodes Active clamping (ACLx) Active clamping is a technique designed to partially turn on the power semiconductor as soon as the collectoremitter (drain-source) voltage exceeds a predefined threshold. The power semiconductor is then kept in linear operation. Gate turn-on (GHx) and turn-off (GLx) terminals 8 / 9 sales01@firstack.com

9 These terminals allow the turn-on (GHx) and turn-off (GLx) gate resistors to be connected to the gate of the power semiconductor. The GHx and GLx pins are available as separated terminals in order to set the turn-on and turn-off resistors independently without the use of an additional diode. Note however that it is not advisable to operate the power semiconductors within a half-bridge with a driver in the event of a low supply voltage. Otherwise, a high rate of increase of V CE may cause partial turn-on of these IGBTs. 9 / 9 sales01@firstack.com