MCP73113 Microchip Technology Inc., MCP73113 Datasheet - Page 19

• Manufacturer Part Number: MCP73113
• Description: Single-cell Li-ion / Li-polymer Battery Charge Management Controller With Input Overvoltage Protection
• Manufacturer: Microchip Technology Inc.

5.9
The MCP73113 shall limit the charge current based on
the die temperature. The thermal regulation optimizes
the charge cycle time while maintaining device reliabil-
ity.
MCP73113 device. Refer to Section 1.0 “Electrical
Characteristics” for thermal package resistances and
Section 6.1.1.2 “Thermal Considerations” for calcu-
lating power dissipation.
.
FIGURE 5-1:
Junction Temperature (T
5.10
The MCP73113 suspends charge if the die tempera-
ture 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 regu-
lation circuitry.
5.11
The charge status outputs are open-drain outputs with
two different states: Low (L), and High Impedance (Hi-
Z). The charge status outputs can be used to
illuminate LEDs. Optionally, the charge status outputs
can be used as an interface to a host microcontroller.
Table 5-2
during a charge cycle.
© 2009 Microchip Technology Inc.
Figure 5-1
600
500
400
300
200
100
0
25 35 45 55 65 75 85 95 105 115 125 135 145
THERMAL REGULATION
THERMAL SHUTDOWN
Status Indicator
summarize the state of the status outputs
V
R
DD
PROG
= 5.2V
depicts the thermal regulation for the
= 2 kΩ
Junction Temperature (°C)
Charge Current (I
J
).
OUT
) vs.
TABLE 5-2:
5.12
Once a single-cell Li-Ion battery is detected, an internal
battery short protection (BSP) circuit starts monitoring
the battery voltage. When V
1.7V battery short protection threshold voltage, the
charging behavior is postponed. 25 mA (typical) detec-
tion current is supplied for recovering from battery short
condition.
Preconditioning mode resumes when V
above battery short protection threshold. The battery
voltage must rise approximately 150 mV above the bat-
tery short protection voltage before the MCP73113
device become operational.
Shutdown
Standby
Preconditioning
Constant Current Fast
Charge
Constant Voltage
Charge Complete - Standby
Temperature Fault
Timer Fault
Preconditioning Timer Fault
CHARGE CYCLE STATE
BATTERY SHORT PROTECTION
STATUS OUTPUTS
MCP73113
BAT
1.6 second 50% D.C.
1.6 second 50% D.C.
1.6 second 50% D.C.
Flashing (Type 2)
Flashing (Type 2)
Flashing (Type2)
falls below a typical
Hi-Z (Type 1)
Hi-Z (Type 1)
Hi-Z (Type 1)
DS22183A-page 19
STAT
Hi-Z
Hi-Z
Hi-Z
L
L
L
BAT
raises