LTC4000_15 Datasheet, PDF (11/40 Pages) Linear Technology – High Voltage High Current Controller for Battery Charging and Power Management

LTC4000
Block Diagram
R_IS
IN
C_IN
C_CLN
R_{VM1 VM}
R_VM2
IN
CLN
–
CP1
1.193V +
A8
g_m = 0.33m
DC/DC CONVERTER
C_IID
R_C
C_C
RST
ITH
CC
10M
IID
IGATE
8mV ^+–
60k
A1
IIMON
C_IIMON
60k
BIAS
R_IL
IL
50µA
C_BIAS
IN
LDO,
BG,
REF ^REF
BIAS
INPUT IDEAL
DIODE DRIVER
A10
A4
+
g_m
–_gm
1V –
ITH AND CC DRIVER
A5
1V
g_m
A7 _OFB
g_m
1.193V
A6 _BFB
g_m
1.136V
NTC
+ CP4
TOO COLD
–
NTC FAULT
LOGIC
+ CP3
CP2
–
TOO HOT
BIAS
2µA
GND
ENC
CHRG
FLT
OUT
C_IBMON
IBMON
CSP
SYSTEM
C_L
LOAD
A9
g_m = 0.33m
CSN
R_CS
A2
+– ^8mV
g_m A11
LINEAR
GATE
DRIVER
AND
VOLTAGE
CLAMP
BGATE
0.974V
ENABLE
CHARGING
BATTERY IDEAL DIODE
AND INSTANT-ON DRIVER
BIAS
5µA/
50µA
CL
OFB
R_OFB1
R_CL
CP6
0.771V
BFB
CP5
1.109V
FBG
R_OFB2
R_BFB1
R_BFB2
10mV
–+
OSCILLATOR
BAT
BIAS
5µA
C_BAT
+
–
R_NTC
CX
TMR ^{CTMR RCX}
BATTERY PACK
4000 BD
R3
Figure 1. LTC4000 Functional Block Diagram
For more information www.linear.com/LTC4000
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