Datasheet

V = 20 V,
F = 750 kHz,
L = 4.7 H
IN
m
88
89
90
91
92
93
94
95
96
97
98
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5
Charge Current
4-cell 16.8 V
3-cell 12.6 V
2-cell 8.4 V
Efficiency - %
bq24735
SLUSAK9A –SEPTEMBER 2011–REVISED JANUARY 2013 www.ti.com
CH1: PHASE, 10V/div, CH2: LODRV, 5V/div, CH3: HIDRV, 10V/div,
CH1: PHASE, 10V/div, CH2: LODRV, 5V/div, CH3: HIDRV, 10V/div,
CH4: inductor current, 2A/div, 400ns/div
CH4: inductor current, 1A/div, 400ns/div
Figure 9. Continuous Conduction Mode Switching Figure 10. Cycle-by-Cycle Synchronous to Non-
Waveforms 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 11. 100% Duty and Refresh Pulse Figure 12. System Load Transient (Input DPM)
CH1: PHASE, 20V/div, CH2: battery voltage, 5V/div, CH3: LODRV,
10V/div, CH4: inductor current, 2A/div, 400us/div
Figure 13. Battery Insertion Figure 14. Efficiency vs Output Current
12 Submit Documentation Feedback Copyright © 2011–2013, Texas Instruments Incorporated
Product Folder Links :bq24735