MAX1874ETE Maxim Integrated Products, MAX1874ETE Datasheet - Page 14

• Manufacturer Part Number: MAX1874ETE
• Description: Battery Management Dual-Input USB/AC Adapter 1-Cell Li+
• Manufacturer: Maxim Integrated Products

Specifications of MAX1874ETE

• Battery Type: Li-Ion, Li-Polymer
• Operating Supply Voltage: 4.35 V to 6.5 V
• Supply Current: 4 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Package / Case: TQFN-16
• Charge Safety Timers: No
• Mounting Style: SMD/SMT
• Temperature Monitoring: No

Dual-Input, USB/AC Adapter, 1-Cell
Li+ Charger with OVP and Thermal Regulation
Figure 4. Full-Featured Circuit. Overvoltage protection MOSFET (Q2) on DC withstands up to 18V from the AC adapter, but disables
charging at inputs over 6.2V. Output switch-over MOSFET (Q3) disconnects the battery from the system load when input power is
applied. The input can power the system through D1, D2, Q1, and Q2 when either USB or AC power is present.
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CHARGING UP TO 6.0V
______________________________________________________________________________________
OVP UP TO 18V
25V CERAMIC
4.7µF
C5
USB INPUT
0.055Ω, -20V
(MBR0520L)
SCHOTTKY
FDN302
500mA,
Q1
D1
0.055Ω, -20V
10kΩ
R3
FDN302
Q2
10V CERAMIC
TO REF
6.3V CERAMIC
1µF
C2
100kΩ
R5
301kΩ
4.7µF
1kΩ
R2
R6
C1
10V CERAMIC
2.2µF
DC
DCOK
DCLV
UOK
USB
DCI
C4
250mΩ
400mΩ
BYP
MAX1874
REGULATOR
PGND
THRM
USEL
BATT
CHG
GND
PON
REF
EN
C3
2.2µF
6.3V CERAMIC
C6
0.1µF
10V CERAMIC
500mA
100mA
D2
500mA,
SCHOTTKY
(MBR0520L)
Q3
FDN302
0.055Ω, -20V
R4
10kΩ
Li+
CELL
NTC
THERMISTOR
10kΩ AT +25°C
TO SYSTEM
LOAD