MCP73113-0NSI/MF MICROCHIP [Microchip Technology], MCP73113-0NSI/MF Datasheet - Page 22

• Manufacturer Part Number: MCP73113-0NSI/MF
• Description: Single-Cell Li-Ion / Li-Polymer Battery Charge Management Controller with Input Overvoltage Protection
• Manufacturer: MICROCHIP [Microchip Technology]

MCP73113/4
6.1.1.2
The worst-case power dissipation in the battery
charger occurs when the input voltage is at the
maximum and the device has transitioned from the
Preconditioning mode to the Constant-current mode. In
this case, the power dissipation is:
Power dissipation with a 5V, ±10% input voltage
source, 500 mA ±10% and preconditioning threshold
voltage at 2.7V is:
EQUATION 6-1:
This power dissipation with the battery charger in the
DFN-10 package will result approximately 63°C above
room temperature.
6.1.1.3
The MCP73113/4 are stable with or without a battery
load. In order to maintain good AC stability in the
Constant-voltage mode, a minimum capacitance of
1 µF is recommended to bypass the V
This capacitance provides compensation when there is
no battery load. In addition, the battery and
interconnections appear inductive at high frequencies.
These elements are in the control feedback loop during
Constant-voltage
capacitance may be necessary to compensate for the
inductive nature of the battery pack.
DS22183B-page 22
Where:
PowerDissipation
I
V
PowerDissipation
V
REGMAX
PTHMIN
DDMAX
Thermal Considerations
External Capacitors
= the maximum input voltage
= the maximum fast charge current
= the minimum transition threshold
voltage
=
mode.
=
(
V
DDMAX
(
5.5V 2.7V
–
Therefore,
–
V
PTHMIN
) 550mA
×
BAT
)
×
the
I
REGMAX
pin to V
=
1.54W
bypass
SS
.
A minimum of 16V rated 1 µF, is recommended to apply
for output capacitor and a minimum of 25V rated 1 µF,
is recommended to apply for input capacitor for typical
applications.
TABLE 6-1:
Virtually any good quality output filter capacitor can be
used, independent of the capacitor’s minimum
Effective Series Resistance (ESR) value. The actual
value of the capacitor (and its associated ESR)
depends on the output load current. A 1 µF ceramic,
tantalum or aluminum electrolytic capacitor at the
output is usually sufficient to ensure stability.
6.1.1.4
The MCP73113/4 provide protection from a faulted or
shorted input. Without the protection, a faulted or
shorted input would discharge the battery pack through
the body diode of the internal pass transistor.
Capacitors
MLCC
X7R
X5R
Reverse-Blocking Protection
-55°C to +125°C
-55°C to +85°C
Temperature
MLCC CAPACITOR EXAMPLE
Range
© 2009 Microchip Technology Inc.
Tolerance
±15%
±15%