Datasheet

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Power Modes
UDG−04101
Active Mode
COM low for 18
seconds?
No
Ship
enabled?
Yes
No
Yes
No
Yes
Ship Mode
COM
pulled high?
Sleep Mode
COM
pulled high?
below DMF
threshold?
43.6 minute
wake?
Yes
Device enters active
mode for 18 seconds
No
Yes
No
No
Yes
V
SR
bq27000 , bq27200
SLUS556D – SEPTEMBER 2004 – REVISED MARCH 2006
Temperature compensation, TCMP, is computed from these coefficients as follows:
TCMP = TCGN * ILMD(273 + TOFF - T)/4
where T is the temperature in ° K and TCMP ≥ 0. CACT is then computed as follows:
CACT = CACD – TCMP
If PKCFG[0] = 1, the device assumes a fixed value of 0x7C for TCOMP, giving a temperature compensation gain
of 0.68% DC/ ° C with an offset of 12 ° C. This frees the EEPROM location of 0x7F for use as a programmable
identification byte.
The bqJUNIOR has five power modes: Active, Sleep, Ship, Hibernate, and Data Retention (RBI). Figure 5 shows
the flow that moves the device between the Active, Sleep, and Ship modes. Hibernate and Data Retention are
special modes not included in the flow. Detailed explanations of each mode follow the diagram in Figure 5 .
Figure 5. Power Mode Flow Chart
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