IC for Control of Lithium-ion Betteries Charging MM1438
MITSUMI
(Except where noted otherwise, Ta=25°C, VCC=5V, SW3 : A, SW6 : A, SW7 : A)
Measurement Procedures
Measurement Procedures
Item
V3 = VCC, V4 = 0V. Next, measure A5 current value Icc1 when V3 is changed
from VCC 0V.
Consumption current 1
Consumption current 2
Output voltage
V3 = Vd = VCC. Measure A6 current value ICC2 at this time.
V3 = VCC, V4 = 0V. Measure T7 voltage VO 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 VCL at this time.
V3 = VCC, V4 = 0V, SW6: C. V7 = 4.5V, SW7: B. Measure A7 current value
ICEL1 at this time.
Current limit
Inflow current between
CEL-CS during operation
V3 = V4 = VCC = 0V, SW6: C. V7 = 4.5V, SW7: B. Measure A7 current value
ICEL2 at this time.
Leak current between CEL-CS
SW1 input current
Measure A4 current value ISW1 when V4 = 0V.
V3 = VCC. Charge: ON (VL1) when V4 potential is varied and T7 voltage is the
prescribed output voltage; Charge OFF (VH1) when 0 ~ 0.05V.
V3 = V4 = 0V. Set V7 voltage 1V lower than T7 (output voltage) potential, and
SW7: B.
SW1 input voltage
L
ow voltage detection voltage
Next gradually lower V7 voltage; V7 voltage is LV when A7 current value is
within 10ꢀA.
SW2 input current
SW2 input voltage
Measure A3 current value ISW2 when V3 = 0V.
V4 = 0V, V7 = 1V, SW7: B. Low voltage detection circuit: ON (VL2) when V3
voltage is varied and A7 current value is within 10ꢀA; low voltage detection
circuit: OFF (VH2) otherwise.
Low voltage detection
output leak current
V3 = VCC, V4 = 0V. Measure A2 current value ILV when V3 is changed from
Vcc 0V.
Low voltage detection
V3 = V4 = 0V. SW3: B, SW7: B. Measure T2 voltage VLV when V7 voltage is 0V.
output saturation voltage
EXT pin inflow current
EXT pin output voltage
V3 = V4 = 0V. SW6: B, SW7: B, V6 = 4V, V7 = 3V. Measure A6 current value IEXT
V3 = V4 = 0V. SW6: C, SW7: B. T6 voltage when V7 = 3V and V7 = 5V is VEXT
.
.
MITSUMI [ MITSUMI ELECTRONICS, CORP. ]
