Description
MAX1551/MAX1555 SOT23 Dual-Input USB/AC Adapter 1-Cell Li+ Battery Chargers AVAILAB LE General .
The MAX1551/MAX1555 charge a single-cell lithium-ion (Li+) battery from both USB and AC adapter sources.
Features
* a CHG output to indicate charging status. With USB connected, but without DC power, charge current is set to 100mA (max). This allows charging from both powered and unpowered USB hubs with no port communication required. When DC power is connected, charging current is set at 280mA (typ). No input-bl
Applications
* PDAs Wireless Appliances Cell Phones
Functional Diagrams
Digital Cameras
Pin Configuration
TOP VIEW
USB 1 5 BAT
AC ADAPTER 3.7V TO 7V DC
Typical Operating Circuit
BAT TO SYSTEM LOAD Li+
GND 2
MAX1551 (MAX1555)
4 DC
USB 3.7V TO 6V
USB
CHARGE CONTROL TO LOGIC RAIL
POK 3 (CHG)
LOGIC CONTROL