BQ26501_16 Datasheet, PDF (21/33 Pages) Texas Instruments – HANDHELD APPLICATIONS

Not Recommended For New Designs
bq26501
ą
SLUS586B − OCTOBER 2003 − REVISED MARCH 2004
APPLICATION INFORMATION
POWER MODES
The bq26501 has four power modes: active, sleep, ship, and hibernate. Figure 5 shows the flow that moves the
device between the active, sleep, and ship modes. Hibernate is a special mode not included in the flow. Detailed
explanations of each mode follow the diagram.
Active Mode
HDQ low for
NO
16 seconds?
YES
Ship Enabled?
NO
YES
Ship Mode
NO
VRs
below DMF
threshold?
YES
Sleep Mode
NO
HDQ pulled
high?
YES
HDQ pulled
high?
NO
4 hour wake?
NO
YES
YES
Device enters
active mode for
16 seconds
Figure 5. Power Mode Flow Chart
1st, 4th, 7th, etc. ^NO
wakeup?
YES
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