參數(shù)資料
型號: MAX1874EVKIT
廠商: Maxim Integrated Products, Inc.
英文描述: MAX1874 Evaluation Kit
中文描述: MAX1874評估板
文件頁數(shù): 13/16頁
文件大?。?/td> 405K
代理商: MAX1874EVKIT
M
Dual-Input, USB/AC Adapter, 1-Cell
Li+ Charger with OVP and Thermal Regulation
______________________________________________________________________________________
13
MAX1874
USB INPUT
DC INPUT
UP TO 6.0V
C5
4.7
μ
F
10V CERAMIC
C1
4.7
μ
F
6.3V CERAMIC
C4
2.2
μ
F
10V CERAMIC
C3
2.2
μ
F
6.3V CERAMIC
C6
0.1
μ
F
10V CERAMIC
TO REF
DCLV
GND
BATT
NTC
THERMISTOR
10k
AT +25
°
C
PON
REF
THRM
DC
USB
400m
250m
Li+
CELL
USEL
500mA
100mA
EN
DCI
PGND
BYP
REGULATOR
UOK
CHG
DCOK
R5
100k
R6
301k
R4
10k
Figure 2. A Minimal Circuit that Assumes System Load Is Only Connected to the Battery. The circuit has a 6.5V maximum input and
disables charging for inputs over 6.2V.
MAX1874
USB INPUT
0VP UP TO 18V
CHARGING UP TO 6.0V
C5
4.7
μ
F
25V CERAMIC
C1
4.7
μ
F
6.3V CERAMIC
C4
2.2
μ
F
10V CERAMIC
C3
2.2
μ
F
6.3V CERAMIC
C6
0.1
μ
F
10V CERAMIC
TO REF
DCLV
GND
BATT
NTC
THERMISTOR
10k
AT +25
°
C
PON
REF
THRM
DC
USB
400m
250m
Li+
CELL
USEL
500mA
100mA
EN
DCI
PGND
BYP
REGULATOR
UOK
CHG
C2
1
μ
F
10V CERAMIC
DCOK
R4
10k
R2
1k
5%
Q2
FDN302
0.055
, -20V
Figure 3. A circuit with overvoltage protection MOSFET (Q2) on DC input withstands up to 18V from the AC adapter and disables
charging at inputs over 6.2V.
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