MAX1667 Maxim, MAX1667 Datasheet - Page 13

• Manufacturer Part Number: MAX1667
• Description: Chemistry-Independent / Level 2 Smart Battery Charger
• Manufacturer: Maxim

Figure 6. Functional Diagram
FROM LOGIC
FROM LOGIC BLOCK
BATT
THM
AGND
FROM LOGIC BLOCK
BATT
REF
BLOCK
CS
4R
R
AGND
10k
100k
5
LEVEL SHIFT AND
CURRENT-SENSE
GAIN OF 5.5
5-BIT DAC
AGND
REF
______________________________________________________________________________________
10k
30k
11
TO LOGIC BLOCK
TO LOGIC BLOCK
11-BIT DAC
AGND
10k
3k
REF
3R
R
TO LOGIC BLOCK
10k
500
CURRENT_INREG
VOLTAGE_INREG
Level 2 Smart Battery Charger
DACV
THERMISTOR_COLD
THERMISTOR_HOT
THERMISTOR_UR
THERMISTOR_OR
GMV
GMI
POWER_FAIL
CLAMP
CCI
CCV
NOTE: APPROX. REF/4 + V
Chemistry-Independent,
MIN
TO 3/4 REF + V
BLOCK
LOGIC
3/8 REF = ZERO CURRENT
CCV_LOW
DCIN/4.5
NOTE:
REF/4 TO 3/4 REF
CLAMP
TO REF
(MAX)
AGND
THRESH
THERM_SHUT
THRESH
AC_PRESENT
FROM LOGIC
BLOCK
SEL
SCL
SDA
INT
COMPARATOR
7mA
SUMMING
AGND
BLOCK
5.4V LINEAR
REGULATOR
R
SHUTDOWN
THERMAL
LEVEL
SHIFT
DCIN
3R
DCIN
IOUT
AGND
REF
CCV
VL
DRIVER
DRIVER
REFERENCE
PGND
INTERNAL
BST
LX
VL
4.096V
MAX1667
DHI
DLO
REF
13