Seiko LTP1245R-C384-E Manual do Utilizador descarregar pdf (Página 12)

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK

S-8243A/B Series

Rev.3.0_00

Seiko Instruments Inc.

4. Overcharge detection voltages, overcharge detection hysteresis, overdischarge detection

voltages, overdischarge detection hysteresis, and overcurrent detection voltages (Test circuit 4)

4. 1 Overcharge detection voltages, hysteresis voltages, and overdischarge detection voltages

In the following V

= V

and the CDT pin is open.

The COP pin and the DOP pin should provide “Low”, which is a voltage equal to V

× 0.1 V or lower, in the condition

that V1 = V2 = V3 = V4 = 3.5 V.

The overcharge detection voltage V

CU1

is defined by the voltage at which COP pin voltage becomes “High”, which is

a voltage equal to VDD × 0.9 V or higher, when the voltage V1 is gradually increased from the starting condition V1

= 3.5 V. The overcharge release voltage V

CL1

is defined by the voltage at which COP pin voltage becomes “Low”

when the voltage V1 is gradually decreased. The hysteresis voltage of the overcharge detection V

HC1

is then defined

by the difference between the overcharge detection voltage V

CU1

and the overcharge release voltage V

CL1

The overdischarge detection voltage V

DL1

is defined by the voltage at which DOP pin voltage becomes “High” when

the voltage V1 is gradually decreased from the starting condition V1 = 3.5 V. The overdischarge release voltage

DU1

is defined by the voltage at which DOP pin voltage becomes “Low” when the voltage V1 is gradually increased.

The hysteresis of the overdischarge detection voltage V

HD1

is then defined by the difference between the

overdischarge release voltage V

DU1

and the overdischarge detection voltage V

DL1

Other overcharge detection voltage V

CUn

, hysteresis voltage of overcharge detection V

HCn

, overdischarge detection

voltage V

DLn

, and hysteresis of the overdischarge detection voltage V

HDn

( for n = 2 to 4) are defined in the same

manner as in the case for n = 1.

4. 2 Overcurrent detection voltages

Starting condition is V1 = V2 = V3 = V4 = 3.5 V, VMP = VDD, and the CDT pin is open. The DOP pin voltage thus

provides “Low”

The overcurrent detection voltage 1, VIOV1 is defined by the voltage difference VDD − VMP at which the DOP pin

voltage becomes “High” when the voltage of VMP pin is decreased.

Starting condition for measuring the overcurrent detection voltage 2 and 3 is V1 = V2 = V3 = V4 = 3.5 V, V

= V

and the CDT pin voltage V

CDT

= V

. The DOP pin voltage thus provides “Low”.

The overcurrent detection voltage 2, V

IOV2

is defined by the voltage difference V

−V

at which the DOP pin voltage

becomes “High” when the voltage of VMP pin is decreased.

The overcurrent detection delay time 2, t

IOV2

is a time needed for the DOP pin to become “High” from “Low” when the

VM pin voltage is changed quickly to V

IOV2

min.−0.2 V from the starting condition V

= V

The overcurrent detection voltage 3, V

IOV3

is defined by the voltage of the VM pin at which the DOP pin voltage

becomes “High” when the voltage of VMP pin is decreased at the speed 10 V / ms.

The overcurrent detection delay time 3, t

IOV3

is a time needed for the DOP pin to become “High” from “Low” when the

VM pin voltage is changed quickly to V

IOV3

min.−0.2 V from the starting condition V

= V

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 35 36

Comentários a estes Manuais

Sem comentários

Seiko LTP1245R-C384-E Manual do Utilizador Página 12

Comentários a estes Manuais

Manuais e produtos relacionados com Digitalizar e Imprimir Seiko LTP1245R-C384-E