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| BQ24152 Datasheet, PDF (22/38 Pages) Texas Instruments – Fully Integrated Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance and USB-OTG Support | |||
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bq24152
SLUS847 â JUNE 2008 ...................................................................................................................................................................................................... www.ti.com
MODE
IN Condition
OUT Condition
Table 4. State Machine Table 2 of bq24152
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.
ANY STATE
VBUS<VUVLO
VAUXPWR<VSHORT
POWER DOWN
VBUS>VUVLO
VAUXPWR<VLOWV
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
VAUXPWR>VPOR
VBUS>POR
HZ_MODE=1
or VBUS<VUVLO, VAUXPWR>VSHORT
HIGH
IMPEDANCE
VBUS>VUVLO
HZ_MODE=0, OPA_MODE=0
CHARGE
CONFIGURE
OPA_MODE=1
HZ_MODE=0
VAUXPWR>VLOWV
HZ_MODE=1
Or
VAUXPWR<VLOWV
HZ_MODE=1
HZ_MODE=1
or
VAUXPWR<VBATMIN
BOOST
CONFIGURE
OPA_MODE=1
HZ_MODE=0
START UP
No FAULTS
BOOST
OPA_MODE=0
or FAULTS
OPA_MODE=1
HZ_MODE=0
OPA_MODE=0
VAUXPWR<VSHORT
or VBUS<VBUS(MIN)
or FAULTS
VAUXPWR>VSHORT
or VBUS<VBUS(MIN)
or FAULTS
VAUXPWR<VSHORT
VBUS>VBUS(MIN)
VBUS>VSLP_ENT+VSLP_EXIT
NO FAULTS
SHORT
CIRCUIT
PWM CHARGE
VAUXPWR>VSHORT, VBUS>VBUS(MIN)
VBUS>VSLP_ENT+VSLP_EXIT
NO FAULTS
Figure 26. State Diagram for bq24152
22
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Product Folder Link(s): bq24152
Copyright © 2008, Texas Instruments Incorporated
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