MITSUMI
IC for Control of Lithium-ion Betteries Charging MM1438
Measurement Procedures
Item
Consumption current 1
Consumption current 2
Output voltage
Current limit
Inflow current between
CEL-CS during operation
Leak current between CEL-CS
SW1 input current
SW1 input voltage
(Except where noted otherwise, Ta=25°C, V
CC
=5V, SW3 : A, SW6 : A, SW7 : A)
Measurement Procedures
V3 = V
CC
, V4 = 0V. Next, measure A5 current value Icc1 when V3 is changed
from V
CC
0V.
V3 = Vd = V
CC
. Measure A6 current value I
CC2
at this time.
V3 = V
CC
, V4 = 0V. Measure T7 voltage V
O
at this time.
V3 = Vcc, V4 = 0V. Set V7 voltage 1V lower than T7 (output voltage) potential
and set SW7 to B. Measure T8 voltage V
CL
at this time.
V3 = V
CC
, V4 = 0V, SW6: C. V7 = 4.5V, SW7: B. Measure A7 current value
I
CEL1
at this time.
V3 = V4 = V
CC
= 0V, SW6: C. V7 = 4.5V, SW7: B. Measure A7 current value
I
CEL2
at this time.
Measure A4 current value I
SW1
when V4 = 0V.
V3 = V
CC
. Charge: ON (V
L1
) when V4 potential is varied and T7 voltage is the
prescribed output voltage; Charge OFF (V
H1
) when 0 ~ 0.05V.
V3 = V4 = 0V. Set V7 voltage 1V lower than T7 (output voltage) potential, and
SW7: B.
Next gradually lower V7 voltage; V7 voltage is L
V
when A7 current value is
within ±10µA.
Measure A3 current value I
SW2
when V3 = 0V.
V4 = 0V, V7 = 1V, SW7: B. Low voltage detection circuit: ON (V
L2
) when V3
voltage is varied and A7 current value is within ±10µA; low voltage detection
circuit: OFF (V
H2
) otherwise.
V3 = V
CC
, V4 = 0V. Measure A2 current value I
LV
when V3 is changed from
Vcc 0V.
V3 = V4 = 0V. SW3: B, SW7: B. Measure T2 voltage V
LV
when V7 voltage is 0V.
V3 = V4 = 0V. SW6: B, SW7: B, V6 = 4V, V7 = 3V. Measure A6 current value I
EXT
.
V3 = V4 = 0V. SW6: C, SW7: B. T6 voltage when V7 = 3V and V7 = 5V is V
EXT
.
Low voltage detection voltage
SW2 input current
SW2 input voltage
Low voltage detection
output leak current
Low voltage detection
output saturation voltage
EXT pin inflow current
EXT pin output voltage
MITSUMI [ MITSUMI ELECTRONICS, CORP. ]
