Microchip Technology MCP7383XRD-PPM Data Sheet

DS20001984F-page 14

 2005-2013 Microchip Technology Inc.

During the Constant-Current mode, the programmed
charge current is supplied to the battery or load. The
charge current is established using a single resistor
from PROG to V

SS

. Constant-Current mode is

maintained until the voltage at the V

BAT

 pin reaches the

regulation voltage, V

REG

.

When the voltage at the V

BAT

 pin reaches the

regulation voltage, V

REG

, constant voltage regulation

begins. The regulation voltage is factory set to 4.2V,
4.35V, 4.40V or 4.50V with a tolerance of ±0.75%.

The charge cycle is terminated when, during Constant-
Voltage mode, the average charge current diminishes
below a percentage of the programmed charge current
(established with the value of the resistor connected to
the PROG pin). A 1 ms filter time on the termination
comparator ensures that transient load conditions do
not result in premature charge cycle termination. The
percentage or ratio of the current is factory set. Refer to

 for charge

termination current options and the 

 for standard options.

The charge current is latched off and the MCP73831/2
enter a Charge Complete mode.

The MCP73831/2 continuously monitor the voltage at
the V

BAT

 pin in the Charge Complete mode. If the

voltage drops below the recharge threshold, another
charge cycle begins and current is once again supplied
to the battery or load. The recharge threshold is factory
set. Refer to 

for recharge threshold options and the 

 for standard options.

The MCP73831/2 limit the charge current based on the
die temperature. The thermal regulation optimizes the
charge cycle time while maintaining device reliability.

 depicts the thermal regulation for the

MCP73831/2.

The MCP73831/2 suspend charge if the die tempera-
ture exceeds 150°C. Charging will resume when the
die temperature has cooled by approximately 10°C.

Ω