MAX1647 Maxim, MAX1647 Datasheet - Page 13

• Manufacturer Part Number: MAX1647
• Description: Chemistry-Independent Battery Chargers
• Manufacturer: Maxim

Figure 6a. MAX1647 Block Diagram
FROM LOGIC
FROM LOGIC BLOCK
BATT
THM
AGND
FROM LOGIC BLOCK
BATT
REF
BLOCK
CS
R
R
AGND
10k
100k
6
LEVEL SHIFT AND
CURRENT-SENSE
R
GAIN OF 5.5
6-BIT DAC
AGND
______________________________________________________________________________________
REF
10k
30k
10
R
TO LOGIC BLOCK
TO LOGIC BLOCK
10-BIT DAC
AGND
10k
3k
REF
R
R
TO LOGIC BLOCK
10k
500
R
CURRENT_INREG
VOLTAGE_INREG
R
DACV
THERMISTOR_COLD
THERMISTOR_HOT
THERMISTOR_UR
THERMISTOR_OR
GMV
GMI
POWER_FAIL
CLAMP
CCV
CCI
NOTE: APPROX. REF/4 + V
MIN
Chemistry-Independent
TO 3/4 REF + V
BLOCK
LOGIC
3/8 REF = ZERO CURRENT
NOTE: REF/4 TO 3/4 REF
CCV_LOW
DCIN/4.5
CLAMP
TO REF
(MAX)
AGND
THRESH
THERM_SHUT
THRESH
AC_PRESENT
16mA
5
Battery Chargers
FROM LOGIC
BLOCK
SEL
SCL
SDA
INT
COMPARATOR
SUMMING
8mA
AGND
BLOCK
5.4V LINEAR
REGULATOR
R
SHUTDOWN
THERMAL
LEVEL
SHIFT
DCIN
4mA
3R
AGND
REF
CCV
2mA
VL
INTERNAL 3.9V
DRIVER
DRIVER
REFERENCE
PGND
BST
LX
VL
1mA
DHI
DLO
DCIN
IOUT
REF
13