EUP9261
Measurement Circuits
Unless otherwise specified, the output voltage levels “H”
and “L” at CO and DO pins are judged by the threshold
voltage (1.0 V) of the N channel FET. Judge the CO pin
level with respect to V
VM
and the DO pin level with
respect to V
SS
.
(4)
Measurement Condition 4, Measurement Circuit 2
<Charger detection voltage, abnormal charge current
detection voltage.>
Set V1=1.8V and V2=0V. Increase V1 gradually until
V1=V
DL
+(V
HD
/2) , then decrease V2 from 0V gradually.
The voltage between VM and VSS when V
DO
goes “H”
from “L” is the charger detection voltage (V
CHA
). Charger
detection voltage can be measured only in the product
whose overdischarge hysteresis V
HD
≠
0.
Set V1=3.5V and V2=0V. Decrease V2 from 0V gradually.
The voltage between VM and VSS when V
CO
goes “L”
from “H” is the abnormal charge current detection voltage.
The abnormal charge current detection voltage has the
same value as the charger detection voltage (V
CHA
).
(1)
Measurement Condition 1, Measurement Circuit 1
<Overcharge
detection voltage, Overcharge hysteresis
voltage.
>
The overcharge detection voltage (V
CU
) is defined by the
voltage between VDD and VSS at which V
CO
goes “L”
from “H” when the voltage V1 is gradually increased from
the starting condition V1=3.5V. The overcharge
hysteresis voltage (V
HC
) is then defined by the difference
between the overcharge detection voltage (V
CU
) and the
voltage between VDD and VSS at which V
CO
goes “H”
from “L” when the voltage V1 is gradually decreased.
(5)
Measurement Condition 5, Measurement Circuit 2
<Normal operation current consumption, Power-down
current consumption.>
Set V1=3.5V and V2=0V under normal condition. The
current I
DD
flowing through VDD pin is the normal
operation consumption current (I
OPE
). Set V1=V2=1.5V
under overdischarge condition. The current I
DD
flowing
through VDD pin is the power-down current consumption
(I
PDN
).
(2)
Measurement Condition 2, Measurement Circuit 2
<Overdischarge detection voltage, Overdischarge
hysteresis voltage >
The overdischarge detection voltage (V
DL
) is defined by
the voltage between VDD and VSS at which V
DO
goes “L”
from “H” when the voltage V1 is gradually decreased
from the starting condition V1=3.5V and V2 =0V. The
overdischarge hysteresis voltage (V
HD
) is then defined by
the difference between the overdischarge detection
voltage (V
DL
) and the voltage between VDD and VSS at
which V
DO
goes “H” from “L” when the voltage V1 is
gradually increased.
(6)
Measurement Condition 6, Measurement Circuit 3
< Internal resistance between VM and VDD, Internal
resistance between VM and VSS. >
Set V1=1.8V and V2=0V. The resistance between VM
and VDD is the internal resistance (R
VMD
) between VM
and VDD. Set V1=3.5V and V2=1.0V. The resistance
between VM and VSS is the internal resistance (R
VMS
)
between VM and VSS.
(3)
Measurement Condition 3, Measurement Circuit 2
<Overcurrent 1 detection voltage, Overcurrent 2
detection voltage, Load short-circuiting detection
voltage.>
The overcurrent 1 detection voltage (V
IOV1
) is defined by
the voltage between VM and VSS at which V
DO
goes ”L”
from “H” when the voltage V2 is gradually increased from
the normal condition V1 =3.5V and V2 =0V.
The overcurrent 2 detection voltage (V
IOV2
) is defined by
the voltage between VM and VSS at which V
DO
goes “L”
from “H” when the voltage V2 is increased at the speed
between 1ms and and 4ms from the normal condition
V1=3.5V and V2 = 0V.
The load short-circuiting detection voltage (V
SHORT
) is
defined by the voltage between VDD and VSS at which
V
DO
goes “L” from “H” when the voltage V2 is increased
at the speed between 1µs and 50µs from the normal
condition V1=3.5V and V2=0V.
(7)
Measurement Condition 7, Measurement Circuit 4
<CO pin H resistance, CO pin L resistance>
Set V1=3.5V, V2=0V and V3=3.0V. CO pin resistance is
the CO pin H resistance (R
COH
). Set V1=4.5V, V2=0V and
V3=0.5V. CO pin resistance is the CO pin L resistance
(R
COL
).
(8)
Measurement Condition 8, Measurement Circuit 4
<DO pin H resistance, DO pin L resistance.>
Set V1=3.5V, V2=0V and V4=3.0V. DO pin
resistance
is the DO pin H resistance (R
DOH
).Set V1=1.8V,V2= 0V
and V4=0.5 V. DO pin resistance is the DO pin L
resistance (R
DOL
).
DS9261 Ver2.4 Jan. 2007
11
EUTECH [ EUTECH MICROELECTRONICS INC ]
