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HCPL-316J Datasheet(PDF) 3 Page - AVAGO TECHNOLOGIES LIMITED |
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HCPL-316J Datasheet(HTML) 3 Page - AVAGO TECHNOLOGIES LIMITED |
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3 / 33 page  3 Product Overview Description The HCPL-316J is a highly integrated power control de- vice that incorporates all the necessary components for a complete, isolated IGBT gate drive circuit with fault pro- tection and feedback into one SO-16 package. TTL input logic levels allow direct interface with a microcontroller, and an optically isolated power output stage drives IGBTs with power ratings of up to 150 A and 1200 V. A high speed internal optical link minimizes the propaga- tion delays between the microcontroller and the IGBT while allowing the two systems to operate at very large common mode voltage differences that are common in industrial motor drives and other power switching ap- plications. An output IC provides local protection for the IGBT to prevent damage during overcurrents, and a second optical link provides a fully isolated fault status feedback signal for the microcontroller. A built in“watch- dog” circuit monitors the power stage supply voltage to prevent IGBT caused by insufficient gate drive voltages. This integrated IGBT gate driver is designed to increase the performance and reliability of a motor drive without the cost, size, and complexity of a discrete design. Two light emitting diodes and two integrated circuits housed in the same SO-16 package provide the input control circuitry, the output power stage, and two op- tical channels. The input Buffer IC is designed on a bi- polar process, while the output Detector IC is designed manufactured on a high voltage BiCMOS/Power DMOS process. The forward optical signal path, as indicated by LED1, transmits the gate control signal. The return opti- cal signal path, as indicated by LED2, transmits the fault status feedback signal. Both optical channels are com- pletely controlled by the input and output ICs respec- tive-ly, making the internal isolation boundary transpar- ent to the microcontroller. Under normal operation, the input gate control signal di- rectly controls the IGBT gate through the isolated output detector IC. LED2 remains off and a fault latch in the in- put buffer IC is disabled. When an IGBT fault is detected, the output detector IC immediately begins a “soft” shut- down sequence, reducing the IGBT current to zero in a controlled manner to avoid potential IGBT damage from inductive overvoltages. Simultaneously, this fault status is transmitted back to the input buffer IC via LED2, where the fault latch disables the gate control input and the ac- tive low fault output alerts the microcontroller. During power-up, the Under Voltage Lockout (UVLO) fea- ture prevents the application of insufficient gate voltage to the IGBT, by forcing the HCPL-316J’s output low. Once the output is in the high state, the DESAT (VCE) detec- tion feature of the HCPL-316J provides IGBT protection. Thus, UVLO and DESAT work in conjunction to provide constant IGBT protection. SHIELD HCPL-316J functional diagram DESAT FAULT UVLO OUTPUT IC SHIELD INPUT IC RESET 5 FAULT 6 VIN+ 1 VIN- 2 VCC1 3 VCC2 13 12 VOUT 11 VEE 9,10 VE 16 DESAT 14 VC VLED2+ GND1 15 4 VLED1- 7 8 VLED1+ LED2 LED1 D R I V E R |
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Descripción similar - HCPL-316J |
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