MAX1811ESA-T Maxim Integrated Products, MAX1811ESA-T Datasheet - Page 5

• Manufacturer Part Number: MAX1811ESA-T
• Description: Battery Management USB-Powered Li+ Charger
• Manufacturer: Maxim Integrated Products

Figure 1. Functional Diagram
PIN
3, 6
1
2
4
5
7
8
EN
NAME
BATT
SELV
GND
CHG
SELI
BIAS
EN
IN
3V
MAX1811
2V
_______________________________________________________________________________________
Battery Regulation Voltage-Select Input. A low (< 0.8V) selects a 4.1V battery regulation set point. A high
(> 2.0V) selects a 4.2V battery regulation set point.
Battery Regulation Current-Select Input. A low (< 0.8V) selects a 100mA maximum battery regulation
current. A high (> 2.0V) selects a 500mA maximum battery regulation current. SELI is not diode clamped
to IN, and the voltage at V
Ground. Connect pins 3 and 6 to a large copper trace for maximum power dissipation.
Input Supply Voltage. Bypass with a 4.7µF capacitor to GND.
Li+ Battery Connection. Bypass with a capacitor no less than 2.2µF to GND. High impedance in
shutdown.
Enable Input. A high (> 2.0V) enables the device. A low (< 0.8V) disables the device and places it into
shutdown mode. BATT is high impedance when disabled.
Charging Indicator Open-Drain Output. CHG pulls low while the device is in charge mode (2.5V
< V
OVERCURRENT
DETECTOR
BATT
THERMAL
LOOP
< BATT Regulation Voltage).
VOLTAGE
LOOP
CURRENT
LOOP
SELI
can exceed the voltage at V
DETECTOR
USB-Powered Li+ Charger
CIRCUIT
MAX
SELECTOR
CURRENT
SELECTOR
VOLTAGE
SELV
DESCRIPTION
SELI
CURRENT-
CIRCUIT
SENSE
IN
.
REGULATOR
IN
OVERVOLTAGE
(2.5V, 4.2V)
DETECTOR
BATTERY
GND
Pin Description
4.7V
CHG
BATT
5