mm1438 Mitsumi Electronics, Corp., mm1438 Datasheet - Page 5

• Manufacturer Part Number: mm1438
• Description: Lithium-ion Battery Charge Control 1 Cell
• Manufacturer: Mitsumi Electronics, Corp.

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