MAX8724 Maxim Integrated Products, MAX8724 Datasheet - Page 10

• Manufacturer Part Number: MAX8724
• Description: (MAX1908 - MAX87xx) Low-Cost Multichemistry Battery Chargers
• Manufacturer: Maxim Integrated Products

Low-Cost Multichemistry Battery Chargers
ELECTRICAL CHARACTERISTICS (continued)
(V
REF, V
per Figure 1a; T
Note 1: If both ICTL and VCTL use default mode (connected to LDO), REFIN is not used and can be connected to LDO.
Note 2: Specifications to -40°C are guaranteed by design and not production tested.
(Circuit of Figure 1, V
10
500mV/div
500mV/div
ERROR AMPLIFIERS
GMV Amplifier Transconductance
GMI Amplifier Transconductance
GMS Amplifier Transconductance
CCI, CCS, CCV Clamp Voltage
LOGIC LEVELS
CELLS Input Low Voltage
CELLS Input Float Voltage
CELLS Input High Voltage
ACOK AND SHDN
ACOK Input Voltage Range
ACOK Sink Current
SHDN Input Voltage Range
SHDN Threshold
DCIN
2A/div
5V/div
V
V
I
V
BATT
BATT
CCV
CCI
______________________________________________________________________________________
BST
= V
ICTL = LDO
VCTL = LDO
(BATTERY INSERTION AND REMOVAL)
PARAMETER
CSSP
- V
LOAD-TRANSIENT RESPONSE
LX
A
= V
= 4.5V, ACIN = GND = PGND = 0, C
= -40°C to +85°C, unless otherwise noted.) (Note 2)
CSSN
DCIN
1ms/div
CCI
CCV
= 18V, V
= 20V, T
BATT
MAX1908 toc01
A
SYMBOL
= +25°C, unless otherwise noted.)
GMV
GMS
GMI
= V
CSIP
500mV/div
500mV/div
CURRENT
CURRENT
ADAPTER
= V
V
C E LLS = V
V
V
0.25V < V
CELLS = float
V
V
5A/div
5A/div
2V/div
V
LOAD
V C T L
ICTL
CLS
V
A COK
S HDN
BATT
V
CCS
CCI
CSIN
= V
ICTL = LDO
CHARGING CURRENT = 3A
V
LOAD STEP = 0 TO 4A
I
= V
SOURCE
LDO
= V
BATT
= 0.4V, V
falling
= 12V, V
REF
RE F IN
LD O
CCV,CCS,CCI
LOAD-TRANSIENT RESPONSE
= 16.8V
RE F IN
= 1µF, LDO = DLOV, C
LIMIT = 5A
(STEP IN-LOAD CURRENT)
, V
, V
, V
CSSP
CONDITIONS
BAT T
ACIN
REFIN
CSIP
CCI
CCS
1ms/div
- V
= 16.8V ,
= 3V
- V
< 2V
Typical Operating Characteristics
= 3V, V
CSSN
CSIN
= 75mV
= 75mV
VCTL
MAX1908 toc02
CCI
CCS
REF
= V
= 1µF; CCI, CCS, and CCV are compensated
0
0
16.8V
ICTL
CURRENT
CURRENT
CURRENT
ADAPTER
CHARGE
= 0.75 x V
5A/div
5A/div
2A/div
2V/div
LOAD
V
BATT
(V
/ 2) -
0.2V
V
0.0625
- 0.4V
MIN
REFIN
150
REFIN
0.5
0.5
22
ICTL = LDO
CHARGING CURRENT = 3A
V
LOAD STEP = 0 TO 4A
I
0
1
0
SOURCE
BATT
REFIN
= 16.8V
LOAD-TRANSIENT RESPONSE
LIMIT = 5A
(STEP IN-LOAD CURRENT)
TYP
, CELLS = FLOAT, CLS =
1ms/div
( V
0.250
MAX
/ 2) +
LDO
0.2V
600
R E F IN
2.0
2.0
0.4
28
25
V
UNITS
µA/mV
µA/mV
µA/mV
MAX1908 toc03
% of
REFIN
mV
mA
V
V
V
V
V
0
0
0