QC962-8A
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Catalog excerpts

QC962-8A - 1

DC-DC Converter for IGBT Driver QC962-8AHybrid integrated IGBT driver Patent protection RoHS Recommended modules • 600V series IGBT (current ^600A) • 1,200V series IGBT (current ^400A) • 1,700V series IGBT (current ^200A) Applications • General inverter • AC servo drive system • Uninterruptible power supply (UPS) • Electric welding machine FEATURES • Built-in high CMRR opto-coupler (CMR: Typ.: 30kV/|js, Min.: 15kV/|js) • Built in positive-negative power supply • Input signal compatible with CMOS & TTL level • High-isolated voltage optocoupler (3750Vrms/min) • Short-circuit protection and fault output function • Soft shut-down and reset timer can be achieved during over-current fault • Adjustable controlled time of detect short circuit • Switching frequency up to 40kHz • Drop-in replacement to M57962AL (See the notes for compatibility) QC962-8A is a hybrid integrated IGBT driver, its main function is to receive the square wave signal from the controller, and after Isolation and amplification, apply to the gate of the IGBT to control the turn-on and turn off of IGBT. it is a square wave signal through the optocoupler that provides reliable electrical isolation, the common mode interference caused by IGBT cannot affect the control system, in addition, QC962-8A can also be used to detect the under-saturated voltage-drop of the collector of IGBT to quickly identify the overcurrent or short circuit state of IGBT, and trigger the protection function, so as to avoid IGBT being burned in the fault conditions, afterwards the controller will issue a warning signal. Maximum ratings MORNSUN GUANGZHOU SCIENCE & TECHNOLOGY CO.,LTD. MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation

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QC962-8A - 2

DC-DC Converter for IGBT Driver QC962-8A Output Specifications Design Reference1. Typical application circui TTL&COMS compatible f=20kHz Vin=3.3-5V Vcc =15V Vee = -10V Rg=2 0 Di : fast recovery diode (trr^0.2ps) DZ1 :30V TVS DZ2, DZ3: 18V R1=4.7K0 Rge=10K0 C1,C2: 100uF (low ESR) Note: Connect a capacitance value during 1uF-10uF in parallel with both ends of the capacitor C1 and C2, to reduce ripple & noise ^Specifications of short circuit protection QC962-8A Detecting a short circuit condition can be divided into the following three cases: A.When the short-circuit protection signal time is...

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QC962-8A - 3

DC-DC Converter for IGBT Driver QC962-8A periodic detection signal issued from the circuit to resume normal work after short signal disappears. dead zone time Drive input Tblind Soft turn-off Tsoft Protective Reset time Over current signal Fault output Instantaneous short circuit Continuous short circuit short circuit Fig.2 schematic diagram of protection Fig.3 Schematic diagram of signal delay test 2)Input and Output delay time, rise time, fall time characteristics defined (see Fig.2) 3)Product operating temperature and operating frequency derate It is suggested that the IGBT driver...

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QC962-8A - 4

DC-DC Converter for IGBT Driver QC962-8A 4. Compatibility feature This product is the basic parameter and function of pin compatible with M57962AL series of products, users without special requirements can be directly used instead, alternative use should pay attention to the following points 1) This product is relative to the M57962AL product to increase the threshold of protection regulation function and pin 7, if users need to use this function can refer to the over current threshold adjusted properly adjusting characteristics, if users need not the adjustment function, please send this...

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QC962-8A - 5

THIRD ANGLE PROJECTION r0lO9 [00.039] 1. Packing Information please refer to 'Product Packing Information'. Packing bag number: 58230001; 2. The IGBT gate-emitter drive loop wiring must be shorter than one meter. 3. The IGBT gate-emitter drive loop wiring should be twisted. 4. If large voltage spike is generated at the collector of the IGBT, increase the IGBT gate resistor; 5. Pin3,9,10 are used only for the test circuit and not be connected with the application circuit; 6. The external blocking capacitors must be connected as close as possible to the driver's pin; 7. The peak reverse...

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