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MAX8939 Datasheet(PDF) 5 Page - Maxim Integrated Products |
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MAX8939 Datasheet(HTML) 5 Page - Maxim Integrated Products |
5 / 44 page _______________________________________________________________________________________ 5 System Power Management for Mobile Handset ELECTRICAL CHARACTERISTICS (continued) (VBATT = 3.7V, VCHG_IN = 5.0V, circuit of Figure 1, TA = -40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC.) PARAMETER CONDITIONS MIN TYP MAX UNITS CHG_IN Fast-Charge Current (MAX8939A) (Note 4) VBATT = 3.5V CHG_CONTROL_A.FAST_CHARGE = 000b 82 90 98 mA 001b 250 270 290 010b 420 450 480 011b 575 630 685 100b 695 765 835 101b 775 850 925 110b 100 120 140 111b 160 180 200 CHG_IN Precharge Current VBATT = 2V 90 100 mA BATT Prequalification Threshold Voltage VBATT rising hysteresis 140mV (typ) 2.5 2.55 2.6 V Soft-Start Time Ramp time to fast-charge current 2.5 ms TOP-OFF Top-Off Threshold (% of Fast-Charge Current) IBATT falling TOP_OFF = 00b 10 % TOP_OFF = 01b 20 TOP_OFF = 10b 30 TOP_OFF = 11b (default) 0 TIMER Timer Accuracy -20 +20 % Fast-Charge Time Limit From entering fast- charge to VBATT < 4.2V MAX8939 CCTR = 00b (default) 60 min CCTR = 01b 120 CCTR = 10b 240 MAX8939A CCTR = 00b (default) 24 CCTR = 01b 120 CCTR = 10b 240 Precharge Timer MAX8939 30 min MAX8939A 12 Top-Off Timer TOPOFF_TIME = 00b 30 min TOPOFF_TIME = 01b 60 TOPOFF_TIME = 10b 120 TOPOFF_TIME = 11b Disable Watchdog Timer MAX8939 2.5 5 10 s MAX8939A 15 30 45 THERMAL LOOP Thermal Limit Temperature Junction temperature when the charge current is reduced, TJ rising, default value +70NC [00] +100 N C +85NC [01] +100NC [10] +115NC [11] |
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Similar Description - MAX8939 |
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