Datasheet

© 2007 Microchip Technology Inc. DS22036B-page 11
MCP73811/2
4.8 Thermal Regulation
The MCP73811/2 limits the charge current based on
the die temperature. The thermal regulation optimizes
the charge cycle time while maintaining device
reliability. Figure 4-2 depicts the thermal regulation for
the MCP73811/2.
.
FIGURE 4-2: Thermal Regulation.
4.9 Thermal Shutdown
The MCP73811/2 suspends charge if the die
temperature exceeds 150°C. Charging will resume
when the die temperature has cooled by approximately
10°C. The thermal shutdown is a secondary safety
feature in the event that there is a failure within the
thermal regulation circuitry.
0
75
150
225
300
375
450
525
25 35 45 55 65 75 85 95
105 115 125 135 145 155
Junction Temperature (°C)
Charge Current (mA)
R
PROG
= 2 kΩ