MAX1908ETI+ Maxim Integrated Products, MAX1908ETI+ Datasheet - Page 16

• Manufacturer Part Number: MAX1908ETI+
• Description: IC CHARGER BATTERY 28-TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX1908ETI+

• Function: Charge Management
• Battery Type: Multi-Chemistry
• Voltage - Supply: 8 V ~ 28 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-WFQFN Exposed Pad
• Product: Charge Management
• Operating Supply Voltage: 2.5 V to 3.6 V
• Supply Current: 400 uA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Charge Safety Timers: Yes
• Mounting Style: SMD/SMT
• Temperature Monitoring: No
• Uvlo Start Threshold: 7 V
• Uvlo Stop Threshold: 7.85 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Low-Cost Multichemistry Battery Chargers
Figure 2. Typical Application Circuit with Fixed Charging Parameters
16
______________________________________________________________________________________
FROM HOST µP
(SHUTDOWN)
AC ADAPTER
8.5V TO 28V
LDO
INPUT
R14
10.5kΩ
1%
R15
8.25kΩ
1%
R16
8.25kΩ
1%
59kΩ
1%
R6
N
19.6kΩ
1%
R7
0.01µF
R19
10kΩ
1%
16.8V OUTPUT VOLTAGE
2.5A CHARGE LIMIT
C9
10kΩ
R20
1%
D2
C5
1µF
P1
LDO
12kΩ
R12
R5
1kΩ
C11
0.1µF
C12
1.5nF
C10
0.01µF
15kΩ
R11
ACOK
DCIN
VCTL
REFIN
ICTL
ACIN
SHDN
ICHG
IINP
CCV
CCI
CCS
C12
1µF
CSSP
REF
0.01µF 0.01µF
MAX8765A
Typical Application Circuits (continued)
MAX1908
MAX8724
MAX8765
0.01Ω
RS1
R18
22kΩ
1%
R17
19.1kΩ
1%
4A INPUT CURRENT LIMIT
CLS
CSSN
CELLS
PGND
DLOV
BATT
CSIP
CSIN
GND
LDO
DLO
BST
DHI
LX
REFIN (4 CELLS SELECT)
N1b
C13
1µF
C15
0.1µF
D3
C4
22µF
R13
33Ω
C16
1µF
PGND
N1a
RS2
0.015Ω
GND
L1
10µH
BATT +
BATT-
THM
BATTERY
TO EXTERNAL
C1
2 × 10µF
LOAD