LTC4015_15 Datasheet, PDF (15/76 Pages) Linear Technology – Multichemistry Buck Battery Charger Controller with Digital Telemetry System

Block Diagram
LTC4015
V_IN
INFET
SYSM5
SYS
OUTFET
CLP
CLN
BATSENS
UVCLFB
VC
RT
DV_CC
SCL
SDA
SMBALERT
CHEM1
CHEM0
CELLS2
CELLS1
CELLS0
MPPT
EQ
+
+–
15mV
–5V LDO
D/A
6-BIT
1.2V FULL-SCALE
+
+
3377.5.5
–
–
D/A
5b LITHIUM CHEMISTRIES
+
6b LEAD-ACID
–
D/A
8-BIT
+
1.2V FULL-SCALE
–
15mV
–5V LDO
D/A
5-BIT
1.2V FULL-SCALE
37.5
COULOMB
COUNTER
STEP-DOWN
SWITCHING
CONTROLLER
OSCILLATOR
I²C
V_SYS
INTV_CC
LDO
2.5V LDO
LOGIC
±1.8V RANGE, SIGNED 16
BITS LSB(1 COUNT) = 3.6V/65535
= 54.9325µV
A/D
V_BAT
V_IN
V_SYS
I_BAT
I_IN
T_DIE
NTC
V_BATSENS /[CELLCOUNT • (7/2)] Li CHEMISTRIES
V_BATSENS /[CELLCOUNT • (7/3)] LEAD-ACID
1.2V
V_IN/30
V_SYS/30
I_BAT (37.5 • (V_CSP – V_CSN))
I_IN (37.5 • (V_CLP – V_CLN))
T_DIE
NTC
SGND
GND (PADDLE)
SGND GND
CSPM5
CSP
CCREFP
CCREFM
CSN
BOOST
TG
SW
DRV_CC
BG
INTV_CC
2P5V_CC
NTCBIAS
NTC
4015 BD
For more information www.linear.com/LTC4015
4015f
15