ZXCT1080E5TA Diodes Incorporated

ZXCT1080 HIGH VOLTAGE HIGH-SIDE CURRENT MONITOR Description Pin Assignments The ZXCT1080 is a high side current sense monitor with a gain of 10 and a voltage output. Using this device eliminates 1 V 5 S- CC the need to disrupt the ground plane when sensing a load current. GND 2 The wide input voltage range of 60V down to as low as 3V make it suitable for a range of applications including systems 7 OUT 3 4 S+ operating from industrial 24 to 28V rails and 48V rails. The separate supply pin (V ) allows the device to continue CC functioning under short circuit conditions, giving an end stop voltage at the output. The ZXCT1080 has an extended ambient operating temperature range of -40C to 125C enabling it to be used in a wide range of applications including automotive. Features Applications 3V to 60V continuous high side voltage Industrial applications current measurement Accurate high-side current sensing Battery management -40 to 125C temperature range Over-current measurement AEC-Q100 Grade 1 qualified Power management Output voltage scaling x10 Automotive current measurement 4.5V to 12V V range CC Low quiescent current: o 80A supply pin o 27A I S+ SOT25 package Typical Application Circuit V R IN SENSE 4 5 S- S+ V CC 1 ZXCT1080 GND OUT 2 3 V OUT 1 of 11 December 2011 ZXCT1080 Diodes Incorporated www.diodes.com Document number: DS33454 Rev. 4 - 2 ZXCT1080 HIGH VOLTAGE HIGH-SIDE CURRENT MONITOR Pin Descriptions Pin Name Description 1 V This is the analogue supply and provides power to internal circuitry CC 2 GND Ground pin 3 OUT Output voltage pin. NMOS source follower with 20A bias to ground This is the positive input of the current monitor and has an input range from 4 S+ 60V down to 3V. The current through this pin varies with differential sense voltage This is the negative input of the current monitor and has an input range 5 S- from 60V down to 3V Absolute Maximum Ratings (T = 25C) A Parameter Rating Unit Continuous voltage on S- and S+ -0.6 and 65 V Voltage on all other pins -0.6 and +14 V Differential sense voltage, V (Note 1) 800 mV SENSE Operating temperature -40 to +125 C Storage Temperature -55 to +150 C Maximum Junction Temperature 125 C 300 Package Power Dissipation (Note 2) mW ( T = 25C) A Operation above the absolute maximum rating may cause device failure. Operation at the absolute maximum ratings, for extended periods, may reduce device reliabilty. Note: 1. V is defined as the differentail voltage between S+ and S- pins SENSE 2. Assumes = 420C/W JA Recommended Operating Conditions Symbol Parameter Min Max Units V Common-mode Sense+ Input Range 3 60 V IN V Supply Voltage Range 4.5 12 V CC V Differential Sense Input Voltage Range 0 0.15 V SENSE V Ouput Voltage Range (Note 3) 0 1.5 V OUT T Ambient Temperature Range -40 125 C A Note: 3. Based on 10x V SENSE 2 of 11 December 2011 ZXCT1080 Diodes Incorporated www.diodes.com Document number: DS33454 Rev. 4 - 2