Mixed-signal and digital signal processing ICs | Analog DevicesMixed-signal and digital signal processing ICs | Analog Devices
Instructions for ANALOG DEVICES models including: MAX77985, MAX77986, MAX77975 High Performance Fast Charger, High Performance Fast Charger, Performance Fast Charger, Fast Charger, Charger
MAX77986 Datasheet and Product Info | Analog Devices
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DocumentDocumentMigration Guide from MAX77975/MAX77976 to MAX77985/MAX77986 General Description The MAX77985/MAX77986 is a high-performance high-input 3.5/5.5A fast charger with a Smart Power SelectorTM. The MAX77985/MAX77986 is the next generation of the MAX77975/MAX77976. Hence, we encourage customers to migrate the solution from MAX77975 to MAX77985 and from MAX77976 to MAX77986. Change List No. MAX77975/MAX77976 1. MAX77975/MAX77976 needs an external protection to support a 15V hot plug. MAX77985/MAX77986 MAX77985/MAX77986 supports a 15V hot plug without an external protection. 2. The B2SOVRC feature is not available. The B2SOVRC feature is available. Smart Power Selector is a trademark of Maxim Integrated Products, Inc. 19-101738; Rev 0; 6/23 © 2023 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. One Analog Way, Wilmington, MA 01887 U.S.A. | Tel: 781.329.4700 | © 2023 Analog Devices, Inc. All rights reserved. Migration Guide from MAX77975/MAX77976 to MAX77985/MAX77986 Change List (continued) No. MAX77975/MAX77976 3. MINSYS = 3.60V (fixed). 4. CHG_CV_PRM (Charge Termination Voltage) is 4.15V to 4.46V (default 4.2V with 10mV steps). Battery Chemistry = Li-ion, Li-Polymer 5. QBEXT (Pin 30)--External Battery FET Control Output. 6. N/A 7. Buck Inductor Current Limit, IHSILIM. IHSILIM for MAX77976 is 9.5A (typ) IHSILIM for MAX77975 is 7A (typ) 8. CHGIN Input Current Limit Setting Range, IINLIMIT. IINLIMIT = 0.1A to 3.2A. 9. N/A 10. Unplug TA during charging when VBATT > VTERM is not detected. 11. SYSUVLO/OVLO/TDIE may turn off permanently after the LPM register is cleared. 12. ICHGIN, VCHGIN_UVLO_ACC, and VCHGIN2SYS_TH. MAX77985/MAX77986 MAX77985A/MAX77986A MINSYS is 3.4V, 3.5V, 3.6V, and 3.7V. MAX77985B/MAX77986B MINSYS is 3.0V, 3.1V, 3.5V, and 3.6V. MAX77985A/MAX77986A CHG_CV_PRM (Charge Termination Voltage) is 4.15V to 4.5375V (default 4.2V with 12.5mV steps). Battery Chemistry = Li-ion, Li-Polymer MAX77985B/MAX77986B CHG_CV_PRM (Charge Termination Voltage) is 3.50V to 4.275V (default 3.60V with 25mV steps). Battery Chemistry = LiFePO4 QBEXT/PGOOD (Pin 30)--Configurable as External Battery FET Control Output or PGOOD as unplug detection of 9V and 15V sources. Spread Spectrum Modulation to reduce EMI. SS_ENV [Bit7:6] in the register CHG_CNFG_00. Buck Inductor Current Limit, IHSILIM. IHSILIM for MAX77986 is 11.1A (typ) IHSILIM for MAX77985 is 8.3A (typ) CHGIN Input Current Limit Setting Range, IINLIMIT. IINLIMIT for MAX77986 = 0.1A to 5.5A IINLIMIT for MAX77985 = 0.1A to 3.5A Higher VSYS buck mode (Mode 0x6) The bug is fixed. The bug is fixed. Tight tolerance of ICHGIN, VCHGIN_UVLO_ACC, and VCHGIN2SYS_TH. 13. CHGIN Input Current Limit Accuracy [Min = -12%, Max = 0%] CHGIN Input Current Limit Accuracy [Min = -10%, Max = 0~+10%] www.analog.com Analog Devices 2 Revision History REVISION REVISION NUMBER DATE 0 6/23 Initial release DESCRIPTION PAGES CHANGED -- Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implicationor otherwise under any patent or patent rights of Analog Devices. Trademarks andregistered trademarks are the property of their respective owners. www.analog.com Analog Devices 3