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BQ24730 Datasheet(PDF) 10 Page - Texas Instruments |
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BQ24730 Datasheet(HTML) 10 Page - Texas Instruments |
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10 / 37 page  www.ti.com 308 308.5 309 309.5 310 310.5 311 14 16 18 20 22 24 V − Input Voltage I − V T = 125 C J o T = 85 C J o T = 25 C J o T = J 0 C o 0 -0.2 -0.4 -0.6 -0.8 -1 -1.2 -1.4 0.2 0 20 30 10 40 50 60 70 80 90 100 V − SRP-SRN Voltage I − mV T = 125 C J o T = 85 C J o T = 25 C J o T = J 0 C o V = 20 V I 75 80 85 90 95 100 0 1 2 3 4 5 7 6 8 Battery Charge Current − A V = 19.5 V T = 20 C I A o V = 12.6 V (BAT) V = 16.8 V (BAT) BAT PH Ch2 12.6 V Ch1 0 V Ch4 0 A Inductor Current t Time = − 5 ms/div Power Loop Verification (DPM) Transient Response Constant Current Regulation, Then (DPM) Regulation Ch4 = System Current Ch1 = Input Current Ch3 = Battery Current t Time = − 1 ms/div Ch1 Ch3 0 A Ch4 0 A 0 500 1000 1500 2000 2500 3000 3500 4000 4500 0 500 1 k 1.5 k 2 k 2.5 k 3.5 k 3 k 4.5 k 4 k System Current − mA V = 12 V V = 20 V R = 10 m (BAT) CC (sns) W ICHG IDPM DPM Active ILOOP Active System Power Selection Adapter is unplugged in, System switches over to battery once the adapter voltage drops below VAIRLINE. 1-A System Load Battery Voltage Adapter Voltage System Voltage t Time = − 1 s/div Ch1 Ch2 Ch4 0 V BYPASS ACDRV BATDRV t Time = − 100 ms/div Ch1 20 V Ch2 20 V Ch1 0 V Ch4 20 V Adapter plugged in (ACDET goes above 1.2 V) ACDRV has a 500-ms delay before turning on ACDET System Power Selection Adapter is plugged in, then 500 ms later the system switches over. 1-A System Load Battery Voltage Adapter Voltage System Voltage t Time = − 200 ms/div Ch1 Ch2 Ch4 0 V bq24730 SLUS695 – MARCH 2006 TYPICAL CHARACTERISTICS (continued) V(IBAT) = CHARGE SENSE 300-kHz SWITCHING FREQUENCY EFFICIENCY AMPLIFIER ACCURACY vs vs vs INPUT VOLTAGE BATTERY CHARGE CURRENT SRP-SRN VOLTAGE Figure 7. Figure 8. Figure 9. BATTERY REMOVAL (CONSTANT REGULATION CURRENT TRANSIENT SYSTEM LOAD CURRENT MODE) vs SYSTEM CURRENT Figure 10. Figure 11. Figure 12. SYSTEM SELECTOR GATE DRIVES SYSTEM SELECTOR ADAPTER SYSTEM SELECTOR ADAPTER AFTER ACDET INSERTION REMOVAL Figure 13. Figure 14. Figure 15. 10 Submit Documentation Feedback |
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