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FAN54047 Datasheet(PDF) 8 Page - Fairchild Semiconductor |
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FAN54047 Datasheet(HTML) 8 Page - Fairchild Semiconductor |
8 / 41 page © 2012 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN54040 – FAN54047 • Rev. 1.0.2 8 Electrical Specifications (Continued) Unless otherwise specified: according to the circuit of Figure 1; recommended operating temperature range for TJ and TA; VBUS=5.0 V; HZ_MODE; OPA_MODE=0; (Charge Mode); SCL, SDA=0 or 1.8 V; and typical values are for TJ=25°C. Symbol Parameter Conditions Min. Typ. Max. Unit Charger PWM Modulator fSW Oscillator Frequency 2.7 3.0 3.3 MHz DMAX Maximum Duty Cycle 100 % DMIN Minimum Duty Cycle 0 % Boost Mode Operation (OPA_MODE=1, HZ_MODE=0) VBOOST Boost Output Voltage at VBUS 2.5 V < VBAT < 4.5 V, ILOAD from 0 to 200 mA 4.80 5.07 5.20 V 3.0 V < VBAT < 4.5 V, ILOAD from 0 to 500 mA 4.77 5.07 5.20 IBAT(BOOST) Boost Mode Quiescent Current PFM Mode, VBAT=3.6 V, ILOAD=0 250 350 A ILIMPK(BST) Q2 Peak Current Limit 1350 1550 1950 mA UVLOBST Minimum Battery Voltage for Boost Operation While Boost Active 2.32 V To Start Boost Regulator 2.48 2.70 VBUS Load Resistance RVBUS VBUS to PGND Resistance Normal Operation 500 k VBUS Validation 100 Protection and Timers VBUSOVP VBUS Over-Voltage Shutdown VBUS Rising 6.09 6.29 6.49 V Hysteresis VBUS Falling 100 mV ILIMPK(CHG) Q1 Cycle-by-Cycle Peak Current Limit Charge Mode 3 A VSHORT Battery Short-Circuit Threshold VBAT Rising 1.95 2.00 2.05 V Hysteresis 100 mV ISHORT Linear Charging Current VBAT < VSHORT Power Path 13 mA Linear 30 TSHUTDWN Thermal Shutdown Threshold (7) TJ Rising 145 °C Hysteresis (7) TJ Falling 25 TCF Thermal Regulation Threshold (7) Charge Current Reduction Begins 120 °C tINT Detection Interval 2.1 s t32S 32-Second Timer (8) Charger Enabled 20.5 25.2 28.0 s Charger Disabled 18.0 25.2 34.0 t15MIN 15-Minute Timer 15-Minute Mode (FAN54040, FAN54042, FAN54046, FAN54047) 12.0 13.5 15.0 min ∆tLF Low-Frequency Timer Accuracy Charger Inactive –25 25 % Notes: 5. Negative current is current flowing from the battery to VBUS (discharging the battery). 6. Q2 always turns on for 60 ns, then turns off if current is below ISYNC. 7. Guaranteed by design; not tested in production. 8. This tolerance (%) applies to all timers on the IC, including soft-start and deglitching timers. |
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