VLA554-01R. IGBT Gate Driver + DC/DC Converter

Transcription

1 VLA55-R Powerex, Inc., 7 Pavilion Lane, Youngwood, Pennsylvania 597 (7) IGBT Gate Driver + DC/DC Converter A C B J K D E H D F V D G i V+ IN 5 V EE Circuit Diagram Dimensions Inches Millimeters DC-AC CONVERTER A. Max.. Max. B.7 Max..5 Max. C.7 Max. 7. Max. D. Max.. Max. E..5 F.5 Max..5 Max. G. Max.. Max. H.±..75±. J.±..5±. K. Max..7 Max. REGULATOR INTERFACE GATE SHUTDOWN CIRCUIT Pins 5,, 7, : NC LATCH TIMER & RESET CIRCUIT DETECT CIRCUIT G 9 VCC 9 ttrip CONTROL DETECT PIN GND COLLECTOR CLAMP ASSIST 5 VCC VO SHUTDOWN 7 SPEED CONTROL FAULT OUTPUT VEE Description: VLA55-R is a hybrid integrated circuit designed for driving n-channel IGBT modules in any gate-amplifier application. This device contains a fully isolated DC-DC converter designed to be used with a fiber optic interface for control signal input and fault signal output. The gate driver provides an over-current protection function based on desaturation detection. Features: Built in Isolated DC-DC Converter for Gate Drive SIP Outline Allows More Space Built in Short Circuit Protection with a pin for Fault Output Built in Collector Clamp Circuit Variable Fall Time on Short- Circuit Protection Electrical Isolation Voltage V rms (for Minute) CMOS Compatible Input Interface Interfaces with Fiber Optic Connector for Isolation of Input Signal Applications: To Drive IGBT Modules for General Industrial Use. Recommended IGBT Modules: V CES = V Series up to A Class V CES = 7V Series up to A Class / Rev.

2 Powerex, Inc., 7 Pavilion Lane, Youngwood, Pennsylvania 597 (7) VLA55-R Absolute Maximum Ratings, unless otherwise specified Characteristics Symbol Rating Units Supply Voltage (DC) V D - ~.5 Volts Output Voltage ("H" Output Voltage) V O Volts Input Current - Pulse(PW msec, Duty Cycle 5%, Applied Pin,) I IN(PULSE) Amperes Output Current (Pulse Width μs) I OHP - Amperes I OLP Amperes Isolation Voltage (Sine Wave Voltage Hz, for min., R.H. <%) V iso V rms Case Temperature (Surface Temperature) T C C Operating Temperature (No Condensation Allowable) T opr - ~ 7 C Storage Temperature (No Condensation Allowable) T stg - ~ * C Fault Output Current (Applied at Pin ) I FO ma Input Voltage to Pin (Applied at Pin ) V R Volts Gate Drive Current (Gate Average Current) I drive * ma Electrical Characteristics,,,, C L =.μf, f = khz unless otherwise specified Characteristics Symbol Test Conditions Min. Typ. Max. Units Supply Voltage V D Recommended Range Volts Switching Frequency f Recommended Range khz Gate Resistance R G Recommended Range. Ω Gate Positive Supply Voltage Volts Gate Negative Supply Voltage V EE Volts Gate Supply Efficiency η Load Current = ma, 7 % η = ( + V EE ) x. / (5 x I D ) x "H" Output Voltage V OH kω Connected Between Pins Volts "L" Output Voltage V OL kω Connected Between Pins Volts "L-H" Propagation Time t PLH I IH = ma *, Propagation Time from Pin μs "L-H" Rise Time t r I IH = ma *.. μs "H-L" Propagation Time t PHL I IH = ma *, Propagation Time from Pin 5... μs "H-L" Fall Time t f I IH = ma *.. μs Timer t timer Between Start and Cancel ms (Under Input Sign "OFF") Fault Output Current I FO Applied Pin, R =.kω ma Controlled Time Detect Short Circuit t trip Pin : 5V and more, Pin 9: Open.5 μs Controlled Time Detect Short Circuit * t trip Pin : 5V and more, Pins 9-, : pf.9 μs (Connective Capacitance) SC Detect Voltage V SC Collector Voltage of IGBT 5 Volts * Differs from H/C condition. * Refer to I drive -T a characteristics. * I H is the current which flows through the LED in the optical link of the input interface. Refer to the Measurement Circuit schematic on page. * Length of wiring of capacitor controlled time detect short-circuit is within 5cm from Pins, and 9 coming and going. / Rev.

3 Powerex, Inc., 7 Pavilion Lane, Youngwood, Pennsylvania 597 (7) VLA55-R Definition of Characteristics SWITCHING OPERATION OPERATION OF SHORT CIRCUIT PROTECTION IN (Pin 5) V -5V More than 5 µs V O (Pin, ) t r t f.5v V I V V V O V -5V -5V t trip, t timer t PLH t PHL PIN OUTPUT V V V Measurement Circuit V D R G.7k VLA55 5 C G SW HFBR-5Z Optical fiber cable (.5 meters) 5 p 9 SW 7 or Pin 5 HFBR-5Z 9.7k 5V R alm =.k HFBR-5Z VI k HC etc. +.7μ k SC5 I IH ISAAM MEASUREMENT CONDITIONS C G =.μf SW : ON Switching Mode SW : OFF Short Circuit Protect Mode SW : OFF Measurement of t trip SW : ON Measurement of t trip / Rev.

4 Powerex, Inc., 7 Pavilion Lane, Youngwood, Pennsylvania 597 (7) VLA55-R Application Example V D R G D D G C COLLECTOR CLAMP CIRCUIT This circuit must be close to Collector and Gate. IGBT MODULE 5 + C D Z FOR VLA55 + C D Z C D Z~ 5 C trip 9 C S 7 or Pin 5 9 FOT PIN D R R D.7k G 5V R alm =.k FOT CONTROL SIGNAL HC etc. +.7μ SC5 k I IH k ISAAM ERROR SIGNAL.7k FOR FILTER ~μs.μ ±5% FOT, : HFBR-5Z (AVAGO) etc. FOR, : HFBR-5Z (AVAGO) etc. C trip : Depends on R G C S : Depends on Surge Voltage D Z : V,.5W~W D Z : V, Bidirectional D : Fast Recovery Diode (t rr : ns max.) RPH (SanKen) etc. C, C : 7μF, 5V (Low Impedance) D ~ : SBD V RM = V, IF SM > A Class R : Ω, W Class R : Ω, /W Class D Z~ : Vpn < Total V Z < V CES of IGBT Rough guide of total V Z is as follows: For V CES V Series 9~V For V CES 7V Series ~V It depends on Vpn, I C(max), R G, snubber circuit inductance of power main circuit, and kind of main condenser. NOTE:. Decoupling capacitors should be located as close as possible to the Hybrid IC pins.. The gate circuit path should be kept as short as possible to minimize influence of switching noise.. D requires approximately the same blocking voltage as the IGBT modules.. When recovery current flows in D, Pin sees high voltage. A zener diode between Pin and Pin is necessary as shown in above diagram. 5. To decrease the speed of output fall time (reverse bias) when protection circuit is operating, connect C S between Pin and Pin 7.. If the short-circuit protection circuit is not used, please connect a.7k ohm resistor between Pin and Pin. (D and D Z are not required.) 7. If the collector clamp circuit is activated repeatedly, it may be destroyed as a result of overheating. For this reason, power dissipation of the zener diode should be determined by testing in the actual inverter. / Rev.

5 Powerex, Inc., 7 Pavilion Lane, Youngwood, Pennsylvania 597 (7) VLA55-R Operation of Protection Circuit Adjustment of Output Fall Time. When an ON input signal is applied for a period longer than Ttrip and the collector voltage is high, the hybrid IC will recognize the condition as a short-circuit and immediately reduce the gate voltage. It will also produce a low voltage fault signal at the respective Pin alerting that the protection circuit is in operation.. The protection circuit will reset if an OFF input signal is applied and the minimum ~ms shutdown time has passed. OFF signal must be 5μs or more.. The controlled time to detect a short-circuit (Ttrip) should be set so that the IGBT can be fully turned ON before a short-circuit condition can be detected. It is possible to adjust Ttrip by connecting a capacitor (Ctrip) between Pins, and 9.. When the short-circuit protection is activated, the soft gate shutdown circuit reduces the collector surge voltage on the IGBT. The gate shut down speed can be slowed even more by adding a capacitor to the CS terminal (between Pins, 7). INPUT SIGNAL V O 9% 5% t t % % Operation Flow on Detecting Short Circuit START DETECTION OF SHORT CIRCUIT GATE SHUTDOWN TIMER START OUTPUT FAULT SIGN END OF TIMER YES INPUT SIGN IS OFF NO NO ~ ms FALL TIME ON ACTIVITY OF SHORT CIRCUIT PROTECTION, t, t, (µs) t, t vs C S CHARACTERISTICS t t YES CLEAR ALARM ENABLE OUTPUT 5 7 CONNECTIVE CAPACITANCE, C S, (pf) PIN: 7 NOTE: Output voltage with protection circuit operating is about -lv EE l + V / Rev. 5

6 Powerex, Inc., 7 Pavilion Lane, Youngwood, Pennsylvania 597 (7) VLA55-R Capacity for Power Supply on Input Side This product has an isolated DC-DC converter built in for gate drive. Follow these three steps to determine the proper capacity of the power supply on the input side.. Calculate the average gate current. I drive = (Q + Q ) x F I drive : Gate average current Q : Gate charge at +5V (read from IGBT datasheet) Q : Gate charge at -7V (read from IGBT datasheet) f : Switching frequency of IGBT. Required current from performance curve. If the result of the calculation for I drive is ma, I D is about 7mA as shown on the graph. I D : Consumption current of DC-DC converter in this HIC GATE CHARGE CHARACTERISTICS OF IGBT V GE +5V Q 7V Q Gate Charge. Calculate the margin INPUT CURRENT, I D, (AMPERES) I out = I D x ( + margin) I out : Output current of input power supply Margin :. If the result of I D is 7mA, the power supply spec is: Output voltage : 5V Output current : greater than 5mA I D I O CHARACTERISTICS LOAD CURRENT, I O, (AMPERES) (PIN: 9, ) Timing Chart Input Signal (V I ) Pins, Output (V O ) Soft Shutdown V CE of IGBT V SC (SC Detection Point) I C of IGBT Pin Fault Output Occurrence of Short Circuit Mask Time t timer Protection Operation is Cleared / Rev.

7 Powerex, Inc., 7 Pavilion Lane, Youngwood, Pennsylvania 597 (7) VLA55-R, V EE, (VOLTS), V EE -T a CHARACTERISTICS f = khz D.F. = 5% LOAD C =.μf V EE, V EE, (VOLTS), V EE -I O CHARACTERISTICS, DC LOAD V D = 5.V V D =.V LOAD CURRENT, I O, (AMPERES) (PIN: 9-, ) PROPAGATION DELAY TIME L-H, t PLH, (μs) PROPAGATION DELAY TIME H-L, t PHL, (μs) t PLH, t PHL -T a CHARACTERISTICS V IN = 5V LOAD C =.μf t PLH t PHL CONTROLLED TIME DETECT SHORT CIRCUIT, t trip, t trip, (μs) t trip -T a CHARACTERISTICS R g = Ω Load: C =.μf t trip (C trip = pf) t trip (C trip = pf) / Rev. 7

8 Powerex, Inc., 7 Pavilion Lane, Youngwood, Pennsylvania 597 (7) VLA55-R CONTROLLED TIME DETECT SHORT CIRCUIT, t trip, (μs) t trip -C trip CHARACTERISTICS INPUT CURRENT, I D, (AMPERES) I D -I O CHARACTERISTICS CONNECTIVE CAPACITANCE, C trip, (pf) (PIN: 9-) LOAD CURRENT, I O, (AMPERES (PIN: 9-, ) H OUTPUT VOLTAGE, V OH, (VOLTS) L OUTPUT VOLTAGE, V OL, (VOLTS) V OH, V OL -T a CHARACTERISTICS f = khz D.F. = 5% LOAD C =.μf V OH V OL EFFICIENCY, η, (%) 7 5 η-i drive CHARACTERISTICS GATE DRIVE CURRENT, I drive, (AMPERES) / Rev.

9 Powerex, Inc., 7 Pavilion Lane, Youngwood, Pennsylvania 597 (7) VLA55-R, V EE -V D CHARACTERISTICS.5 I drive -T a CHARACTERISTICS, V EE, (VOLTS) I O =.A 5 7 SUPPLY VOLTAGE, V D, (VOLTS) V EE GATE DRIVE CURRENT, I drive, (AMPERES) LOAD: = C =.μf 5V.5V 75 7 I O =.A η-v D CHARACTERISTICS EFFICIENCY, η, (%) SUPPLY VOLTAGE, V D, (VOLTS) / Rev. 9