NCP1850 Datasheet, PDF (9/30 Pages) ON Semiconductor – Fully Integrated Li-Ion Switching Battery Charger

NCP1850
BLOCK DIAGRAM
CCAP
4.7mF
VBUS
D+
D−
GND
IN
CIN
1mF
VCAP
Q1
Drv
Charge
Pump
CCORE
CORE
2.2mF
TRANS
CTRS
USB PHY
0.1mF
OTG
5V
reference
VCORE
Current,
Voltage,
and Clock
Reference
VREG
VTJ
VTJ
+
TSD −
+
TH2 −
+
TH1 −
+
TWARN −
I2C &
DIGITAL
CONTROLER
ILIM
INTB
AGND
VBAT
DRV
VIN
+
VINDET _−
+
VBUSUV −
+
VBUSOV −
+
VINOV −
+
−
VCHGDET +
CAP
VCAP
IINREG
ICHG
VCHG
VCORE
Q2
Drv
Q3
VCORE
Drv
+ I_EOC
− _IBAT
+
− _VBATOV
+
− _VRECHG
+
− _VFET
+
− V_PRE
+
− _VSAFE
VBAT
ICHG
+
Amp
−
+
− _VRMOVED
+
− _VCOLD
−
+ V_HOT
−
+ _VNTCDIS
DRV
VREG
BATFET detection
& Drive
RNTCPU
* Optional
Figure 2. Block Diagram
CBOOT
SW
PGND
SENSP
SENSN
WEAK
BAT
FET
NTC
SPM
FLAG
SCL
SDA
CBOOT
10nF
LX
2.2mF
RSNS
68mW
QBAT*
CSYS
10mF
+
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