MAX11080/MAX11081 19-4584 Rev 1 6/10 12-Channel, High-Voltage Battery-Pack Fault Monitors General Description Features The MAX11080/MAX11081 are battery-pack fault-moni- Up to 12-Cell Li+ Battery Voltage Fault Detection tor ICs capable of monitoring up to 12 lithium-ion (Li+) Operation from 6.0V to 72V battery cells. This device is designed to provide an overvoltage or undervoltage fault indication when any Pin-Selectable Overvoltage Threshold from +3.3V of the cells cross the user-selectable threshold for to +4.8V in 100mV Increments longer than the set program-delay interval. The over- 25mV Overvoltage-Detection Accuracy voltage levels are pin selectable from +3.3V to +4.8V Pin-Selectable Undervoltage Threshold from in 100mV increments, and have a guaranteed accura- +1.6V to +2.8V in 200mV Increments cy of 25mV over the entire temperature range. The undervoltage level is also user selectable from +1.6V 100mV Undervoltage-Detection Accuracy to +2.8V in 200mV increments. These levels are guar- Overvoltage/Undervoltage-Threshold Detection anteed to 100mV over the entire temperature range. Hysteresis Undervoltage detection can be disabled as one of the MAX11080: 300mV user-configuration options. MAX11081: 37.5mV The MAX11080/MAX11081 have a built-in level-shifter Programmable Delay Time of Alarm Detection that allows up to 31 MAX11080/MAX11081 devices to from 3.0ms to 3.32s with an External Capacitor be connected in a daisy-chain fashion to reduce the number of interface signals needed for large stacks of Daisy-Chained Alarm and Shutdown Functions series batteries. Each cell is monitored differentially and with Heartbeat Status Signal compared to the overvoltage and undervoltage thresh- Up to 31 Devices Can Be Connected olds. When any of the cells exceed this threshold for longer than the set program delay interval, the Ultra-Low-Power Dissipation MAX11080/MAX11081 inhibit the heartbeat signal from Operating-Mode Current Drain: 80A being passed down the daisy-chain. Built-in compara- Shutdown-Mode Current: 2A tor hysteresis prevents threshold chattering. Wide Operating Temperature Range from -40C to The MAX11080/MAX11081 are designed to be the per- fect complement to the MAX11068 high-voltage mea- +105C (AEC-Q100, Type 2) surement IC for redundant fault-monitoring applications. 9.7mm x 4.4mm, 38-Pin TSSOP Package This device is offered in a 9.7mm x 4.4mm, 38-pin TSSOP package with 0.5mm pin spacing. The package Lead(Pb)-Free and RoHS Compliant is lead-free and RoHS compliant with an extended operating temperature range of -40C to +105C. Applications Ordering Information High-Voltage, Multicell-Series-Stacked Battery PART TEMP RANGE PIN-PACKAGE Systems MAX11080GUU/V+ -40C to +105C 38 TSSOP Electric Vehicles MAX11081GUU/V+ -40C to +105C 38 TSSOP Hybrid Electric Vehicles +Denotes a lead(Pb)-free/RoHS-compliant package. Electric Bikes /V denotes an automotive qualified part. High-Power Battery Backup Solar Cell Battery Backup Pin Configuration appears at end of data sheet. Super-Cap Battery Backup Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE12-Channel, High-Voltage Battery-Pack Fault Monitors ABSOLUTE MAXIMUM RATINGS HV, VDD , GND , DCIN to AGND.........................-0.3V to +80V ESD Rating U U HV to DCIN and C12 ................................................-0.3V to +6V C , REF, V , VDD GND , AA U, U Cn+1 to Cn, where n = 1 to 11...............................-0.3V to +80V DCIN, SHDN, CP+, CP-, HV, C1 to C0 ...................................................-0.3V to +20V (Note 1) OVSEL , UVSEL , TOPSEL, C1 to AGND ..............................-0.3V to (V + 0.6V) (Note 2) DCIN ALRM , ALRM , U L C0 to AGND...........................................................-0.3V to +0.9V AGND, CD 2kV (Human Body Model, Note 3) .............................. C2C12 to AGND ....................................-0.3V to (V + 0.6V) DCIN Continuous Power Dissipation (T = +70C) A SHDN, V to AGND................................................-0.3V to +4V AA 38-Pin TSSOP (derate 15.9mW/C above +70C) ....1095.9mW VDD to GND .........................................................-0.3V to +6V U U Operating Temperature Range .........................-40C to +105C OVSEL , UVSEL , TOPSEL to AGND.........-0.3V to (V + 0.3V) AA Storage Temperature Range .............................-55C to +150C CD, ALRM to AGND..................................-0.3V to (V + 0.3V) L AA Junction Temperature (continuous).................................+150C ALRM to GND ...................................-0.3V to (+VDD + 0.3V) U U U Lead Temperature (soldering, 10s) .................................+300C CP+ to AGND ...........................(GND - 0.3V) to (VDD + 0.3V) U U Soldering Temperature (reflow) .......................................+260C CP- to AGND...........................................-0.3V to (GND + 0.3V) U CP- to VDD .......................................................................+0.3V U Note 1: The C1 to C0 differential input path is tolerant to 80V as long as the SHDN pin is deasserted. Note 2: The C1 input is tolerant to a maximum V + 0.6V with SHDN = 1. If SHDN = 0, 20V is the maximum rating. DCIN Note 3: Human Body Model to Specification MIL-STD-883 Method 3015.7. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (T = T to T , unless otherwise noted. V = V = +6.0V to +72V, typical values are at T = +25C, unless otherwise A MIN MAX DCIN GND A U specified from -40C to +105C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS C INPUTS Any two inputs Cn to Cn+1, 1.5 72 where n = 1 to 11 (Note 4) Differential Input Range VCELL V XIN C1 to C0 with SHDN = 1 1.5 72 C1 to C0 with SHDN = 0 1.5 16 Input Current IC V = 3.0V -1 0.05 +1 A XIN CELL Overvoltage Threshold V +3.3 +4.8 V OV Overvoltage-Threshold Accuracy 5 25 mV Undervoltage Threshold V +1.6 +2.8 V UV Undervoltage-Threshold 20 100 mV Accuracy MAX11080 300 Comparator Hysteresis (Note 4) V mV HYS MAX11081 12 37.5 77 CD PIN CD Current I V = 0.4V 4.35 6.1 7.65 A CD CD CD Trip Voltage V Internal at comparator 1.23 V CD Delay-Time Accuracy Excluding C variation 20 % DLY STATUS/CONTROL PORT Shutdown Disable (SHDN High SHDN/V 2.1 V IH Voltage) Shutdown Asserted (SHDN Low SHDN/V 0.6 V IL Voltage) 2 MAX11080/MAX11081