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TPD4113AK Scheda tecnica(PDF) 11 Page - Toshiba Semiconductor |
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TPD4113AK Scheda tecnica(HTML) 11 Page - Toshiba Semiconductor |
11 / 21 page TENTATIVE TPD4113AK 2005-05-20 11 Description of Protection Function (1) Under voltage protection This product incorporates the under voltage protection circuit to prevent the IGBT from operating in unsaturated mode when the V CC voltage or the V BS voltage drops. When the VCC power supply falls to this product internal setting (VCCUVD = 11 V typ.), all IGBT outputs shut down regardless of the input. This protection function has hysteresis. When the VCCUVR ( = 11.5 V typ.) reaches 0.5 V higher than the shutdown voltage, this product is automatically restored and the IGBT is turned on again by the input. When the V BS supply voltage drops (VBSUVD = 9 V typ.), the high-side IGBT output shuts down. When the VBSUVR ( = 9.5 V typ.) reaches 0.5 V higher than the shutdown voltage, the IGBT is turned on again by the input signal. (2) Thermal shutdown This product incorporates the thermal shutdown circuit to protect itself against the abnormal state when its temperature rises excessively. When the temperature of this chip rises due to external causes or internal heat generation and the internal setting TSD reaches 150°C, all IGBT outputs shut down regardless of the input. This protection function has hysteresis ( ∆TSD = 50°C typ.). When the chip temperature falls to TSD − ∆TSD, the chip is automatically restored and the IGBT is turned on again by the input. Because the chip contains just one temperature detection location, when the chip heats up due to the IGBT, for example, the differences in distance from the detection location in the IGBT (the source of the heat) cause differences in the time taken for shutdown to occur. Therefore, the temperature of the chip may rise higher than the thermal shutdown temperature when the circuit started to operate. Safe Operating Area Note 1: The above safe operating areas are Tj = 135°C (Figure 1) and Tc = 95°C (Figure 2). If the temperature exceeds thsese, the safe operation areas reduce. 0.83 0 450 Power supply voltage VBB (V) Figure 1 SOA at Tj = 135°C 0 0.9 0 450 Power supply voltage VBB (V) Figure 2 SOA at Tc = 95°C 0 |
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