BQ24140_14 Datasheet, PDF (9/39 Pages) Texas Instruments – Integrated Dual-Input Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance and USB-OTG Support

bq24140
www.ti.com
SLUSAO5 – OCTOBER 2011
V_IN=5V or V_BUS=5V, I_CHARGE = 1550mA, V_BAT = 3.5--4.44V (Adjustable), Safety Timer = 15 minutes or 32 seconds
BLOCK DIAGRAM
PMID2
PMID2
VIN
VIN
PMID1
PMID1
VBUS
VBUS
Q1
VREF
+
Charge
Pump
VIN_DPM
-
+
IIN_LIM
-
Q4
Q2
OSC
CBC Current
Limit
PWM Controller
Q3
CBC Current
Limit
Q5
VREF ^Charge
Pump
+
VBUS_DPM
-
+
IBUS_LIM
-
VBUS ₊
VBUS UVLO
-
VIN ₊
VIN UVLO
-
VBUS ₊
VBUS OVP _-
VIN ₊
VIN OVP _-
TJ ₊
TSHTDWN _-
VBAT ₊
VBAT OVP _-
VBUS UVLO
VIN UVLO
VBUS OVP
VIN OVP
TSHUT
BAT OVP
PMID2
PWM Charge
Linear Chg
2.5V, 10mA (back
to back switches)
Q6
TREG
+
TJ
-
+
-
-
ICHG
+
VREF
- ^VOREG
ISHORT
VBUS Poor
Source
+ V_BUS
-
VBUS MIN
VIN Poor
Source
Charge Control,
Timer and Display
Logic
PWM Charge
+ V_IN
Ref & Bias
-
VIN MIN
PMID1
+ V_BAT
-
VSHORT
PMID2
VBAT
LED
VBAT ₊
VOREG - VRCH _-
Recharge
VBUS ₊
VBAT _-
Sleep VBUS
GND
GND
GND
GND
GND
VIN ₊
Sleep VIN
VBAT _-
VCSIN
VBAT
ITERM
Recharge
+
-
-
Termination
I2C Control
SW2
SW2
SW1
SW1
VREG
CSIN
VBAT
BOOT
VREF
BOOT1
LED
STAT
DIS
SLRST
OTG
SDA
SCL
Figure 2. bq24140 Block Diagram
Copyright © 2011, Texas Instruments Incorporated
Product Folder Link(s): bq24140
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