BQ24150A Datasheet, PDF (11/41 Pages) Texas Instruments – Fully Integrated Switch-Mode One-Cell Li-Ion Charger With Full USB Compliance and USB-OTG Support

bq24150A
bq24151A
www.ti.com ..................................................................................................................................................................................................... SLUS931 – APRIL 2009
FUNCTIONAL BLOCK DIAGRAM (Charge Mode)
PMID
PMID
PMID
VBUS
VBUS
PGND
PGND
PGND
bq24150A/1A
VPMID
V_BUS
NMOS
VREF1
Q1
Charge
Pump
IIN_LIMIT
T_CF
TJ
OSC
-
+
-
+
-
V_BUS
V_UVLO
V_BUS
VIN(MIN)
V_BUS
V_{OVP_IN}
TJ
T_SHTDWN
V_OUT
V_OVP
+
VBUS UVLO
-
+
Poor Input
+
VBUS OVP
-
+
Thermal
-
Shutdown
+
* ^{Battery OVP}
-
NMOS
Q2
PWM
Controller
CBC
Current
Limiting
I_LIMIT
-
+
-
PWM_CHG
Q3
NMOS
+
VOUT
-
V_OREG
VCSIN
I_OCHARGE
VREF
REFERNCES
& BIAS
VPMID
CHARGE CONTRO,L
TIMER and DISPLAY
LOGIC
VREF
ISHORT
VBAT
LINEAR _CHG
V_BAT
VBUS
V_OREG-V_RCH
V_OUT
V_OUT
V_CSIN
I_TERM
V_BAT
VSHORT
+
* ^Sleep
-
+
* ^Recharge
-
Termination
-
+_*
-
+
* ^{PWM Charge}
-
Mode
* Signal Deglitched
(I2C Control)
Decoder
DAC
SW
SW
SW
CSOUT
CSIN
VREF
BOOT
AUXPWR
STAT
OTG
SCL
SDA
Figure 21. Function Block Diagram of bq24150A/1A in Charge Mode
Copyright © 2009, Texas Instruments Incorporated
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