BQ24150 Datasheet, PDF (22/39 Pages) Texas Instruments – Fully Integrated Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance and USB-OTG Support

bq24150
bq24151
SLUS824 – JUNE 2008 ...................................................................................................................................................................................................... www.ti.com
State Machine Table and State Diagram
Based on the previously-described operation modes, the definitions of all operation states are shown in Table 3
and Table 4, whereas the relationship among different states is shown in Figure 26.
MODE
IN Condition
OUT Condition
I²C
Buck
I_(SHORT)
Boost
Q1
Note
Table 3. State Machine Table 1 of bq24150/1
POWER DOWN
VBUS < UVLO
V_(AUXPWR) < V_(SHORT)
VBUS > UVLO
V_(AUXPWR) > V_(SHORT)
Off
Off
Off
Off
Off
POR when out
CHARGE CONFIGURE
OPA_MODE = 0
HZ_MODE = 0
OTG Inactive
VBUS > UVLO
VBUS < VBUS(MIN)
or
VBUS < V_{(SLP_ENT)}
or
CE = HIGH
OPA_MODE = 1
or HZ_MODE = 1
or
VBUS > VBUS(MIN)
VBUS > V_{(SLP_ENT)}
+ V_{(SLP_EXIT)}
or VBUS > UVLO
OTG Active
On
Off
Off
Off
On/Off
SHORT CIRCUIT
OPA_MODE = 0
HZ_MODE = 0
OTGIinactive
VBUS < VBUS(MIN)
VBUS < V_{(SLP_ENT)}
+V_{(SLP_EXIT)}
V_(AUXPWR) < V_(SHORT)
CE = Low
No Faults
OPA_MODE = 1
or HZ_MODE = 1
VBUS < VBUS(MIN)
VBUS < V_{(SLP_ENT)}
or
V_(AUXPWR) < V_(SHORT)
CE = HIGH
or Faults
or OTG Active
On
Off
On
Off
On
PWM CHARGE
OPA_MODE = 0
HZ_MODE = 0
OTG Inactive
VBUS < VBUS(MIN)
VBUS < V_{(SLP_ENT)}
+V_{(SLP_EXIT)}
V_(AUXPWR) < V_(SHORT)
CE = Low
No Faults
OPA_MODE = 1
or HZ_MODE = 1
VBUS < VBUS(MIN)
VBUS < V_{(SLP_ENT)}
or
V_(AUXPWR) < V_(SHORT)
CE = HIGH
or Faults
or OTG Active
On
On
Off
Off
On
Table 4. State Machine Table 2 of bq24150/1
MODE
IN Condition
OUT Condition
HIGH IMPEDANCE
OPA_MODE = 1
or OTG inactive
VBUS < UVLO, V_(AUXPWR) > V_(SHORT)
or Boost Configure,
V_(AUXPWR) + V_(LOWV)
or Boost, V_(AUXPWR) +V_(BAT)MIN
HZ_MODE = 0, OPA_MODE = 0
VBUS > UVLO
or HZ_MODE = 0, OPA_MODE = 1
V_(AUXPWR) > V_(LOWV)
or V_(AUXPWR) +V_(SHORT)
or OTG Active
On
Off
Off
Off
Off
BOOST CONFIGURE
OPA_MODE = 1
or HZ_MODE = 1
or OTG active
V_(AUXPWR) > V_(LOWV)
Ready To Start Up
or Faults During Boost
OPA_MODE = 0
OTG Inactive
or HZ_MODE = 1
or V_(AUXPWR) > V_(LOWV)
Boost Start Up Finished
On
Off
Off
Off
On/Off ⁽¹⁾
(1) Q1 is OFF when VBUS is shorted to ground.
BOOST
OPA_MODE = 1
HZ_MODE = 0
or OTG active
V_(AUXPWR) > V_(BAT)MIN
Start Up Finished
or No Faults
OPA_MODE = 0
OTG Inactive
or HZ_MODE = 1
or V_(AUXPWR) > V_(BAT)MIN
or Faults
On
Off
Off
On
On
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