bq24735
SLUSAK9 –SEPTEMBER 2011
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CH1: ILIM, 1V/div, CH4: inductor current, 1A/div, 4us/div
CH1: Vin, 10V/div, CH2: LODRV, 5V/div, CH3: PHASE, 10V/div,
CH4: inductor current, 2A/div, 2ms/div
Figure 7. Current Soft-Start
Figure 8. Charge Disable by ILIM
CH1: PHASE, 10V/div, CH2: LODRV, 5V/div, CH3: HIDRV, 10V/div,
CH4: inductor current, 2A/div, 400ns/div
CH1: PHASE, 10V/div, CH2: LODRV, 5V/div, CH3: HIDRV, 10V/div,
CH4: inductor current, 1A/div, 400ns/div
Figure 9. Continuous Conduction Mode Switching
Waveforms
Figure 10. Cycle-by-Cycle Synchronous to
Non-synchronous
CH1: PHASE, 10V/div, CH2: LODRV, 5V/div, CH4: inductor current, CH2: battery current, 2A/div, CH3: adapter current, 2A/div, CH4:
2A/div, 4us/div system load current, 2A/div, 100us/div
Figure 12. System Load Transient (Input DPM)
Figure 11. 100% Duty and Refresh Pulse
12
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