MEZS7-1SSAPOWERBANK – MP2632
SOLUTION MODULE
MEZS7-1SSAPowerBank Rev. 1.0
www.MonolithicPower.com
3
6/23/2020
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© 2020 MPS. All Rights Reserved.
QUICK START GUIDE
This solution module supports the MP2632, a standalone switch-mode battery charge management
and system power path management device with integrated reverse directional boost from BATT to
SYS. The
solution module’s layout accommodates most commonly used capacitors. The default
function of this solution module is preset at charge mode; the charge-full voltage is preset to 4.2V for a
single-cell Li-ion battery.
Charge Mode Setting
1.
Input Current Limit
An input current limit can be set slightly below the input source
’s maximum current rating. When the
input current reaches this limit, the charge current decreases to keep the input current constant at
the limit value to initially power the system. The resistor connected to the ILIM pin (R
ILIM
) programs
this limit. To set the input current limit at 2.7A, set R
ILIM
at 14.7k
Ω. I
ILIM
can be calculated using
Equation (1):
ILIM
ILIM
40(k )
I
(A)
R
(k )
(1)
2.
Charge-Full Voltage
The default charge-full voltage on this solution module is set at 4.2V by floating R1 and R2. The
setting can be modified according to Table 1.
Table 1: R1 and R2 Settings
R1
R2
Charge-Full Voltage (V)
Float
Float
4.2
Float
0
Ω
4.35
0
Ω
Float
4.45
3.
Charge Current
The charge current can be programmed via both RS1 and R
ISET
. With given RS1 = 10m
Ω,
determine the charge current using Equation (2):
CHG
ISET
1500
I
(A)
R
(k ) RS1(mA)
(2)
For a 3A charge current, the given R
ISET
is 49.9k
Ω.
Boost Mode
1.
System Output Current Limit
Set the system output current limit in boost mode for the MP2632 to operate like a standard
adapter. Set the output current limit using Equation (3):
OLIM
OLIM
1500
I
(A)
R
(k ) RS1(m )
(3)
For a 3A output current limit, the given R
OLIM
is 49.9k
Ω.
For additional information on MP2632 operation, refer to the MP2632 datasheet.