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MCZ33291LEG Datenblatt(PDF) 2 Page - Freescale Semiconductor, Inc |
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MCZ33291LEG Datenblatt(HTML) 2 Page - Freescale Semiconductor, Inc |
2 / 26 page Analog Integrated Circuit Device Data 2 Freescale Semiconductor 33291L Figure 2. 33291L Simplified Block Diagram V PWR 21 Gate Control Open Load Detect Short Circuit Detect Over- temperature Detect Over- voltage Voltage Regulator Serial D/O Line Driver OVD VDD RB SFPD SFL CS SCLK SI SO CSI CSBI GE OT SF OF SPI Interface Logic + - Fault Timers + + + 10 μA 25 μA 10 μA Bias To Gates 1–7 Output 0 24 Outputs From Detectors 1–7 RS lLimit 53 V 1, 2, 11–14, 23 PIN SFPD RST CS SCLK SI SO 16 15 22 10 3 4 9 10 μA 10 μA Grounds 5–8, 17–20 Table 1. Fault Operation SERIAL OUTPUT (SO) PIN REPORTS Overvoltage Overvoltage condition reported. Overtemperature Fault reported by Serial Output (SO) pin. Overcurrent SO pin reports short to battery/supply or overcurrent condition. Output ON, Open Load Fault Not reported. Output OFF, Open Load Fault SO pin reports output OFF open load condition. DEVICE SHUTDOWNS Overvoltage Total device shutdown at VPWR = 28 V to 36 V. All outputs are latched off while the SPI register is reset (cleared). Outputs can be turned back on with a new SPI command after VPWR has decayed below 26.5 V. Overtemperature Only the output experiencing an overtemperature condition turns OFF. Overcurrent Only the output experiencing an overcurrent shuts down at 1.0 A to 3.0 A after a 70 μs to 250 μs delay, with SFPD pin grounded. All other outputs will continue to operate in a current limit mode with no shutdown if the SFPD pin is at 5.0 V (so long as the individual outputs are not experiencing thermal limit conditions). |
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