S-8243AACFT-TB-X Datasheet, PDF(11/35 Page) Seiko Instruments Inc

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

S-8243AACFT-TB-X Datasheet, PDF (11/35 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC

◁

Rev.3.1_00

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

S-8243A/B Series

ï® Test Circuits

In this chapter test methods are explained for the case of S-8243B Series, which is designed for 4-serial cell pack. For the

case of S-8243A Series, which is designed for 3-serial cell, voltage source V2 should be shorted, V3 should be read as V2,

and V4 as V3.

1. Current consumption (Test circuit 1)

Current consumption at not monitoring VBATOUT, IOPE, is a current measured at the VSS pin when V1 = V2 = V3 = V4 =

3.5 V and VMP = VDD. Current consumption at power down, IPDN, is a current measured at the VSS pin when V1 = V2 =

V3 = V4 = 1.5 V and VMP = VSS.

2. Voltage regulator (Test circuit 2)

Output voltage of the regulator VOUT is a voltage measured at the VREG pin when VDD = VMP = 14 V and IOUT = 3 mA.

Line regulation of the voltage regulator ÎVOUT1 is defined by the equation ÎVOUT1 = VOUT2âVOUT1 where VOUT1 is the

output voltage when VDD = VMP = 6 V and IOUT = 3 mA, and VOUT2 is the output voltage when VDD = VMP = 18 V and IOUT

= 3 mA.

Load regulation of the regulator is defined by the equation ÎVOUT2 = VOUT3âVOUT where VOUT3 is the output voltage when

VDD = VMP = 14 V and IOUT = 5 Î¼A.

3. Battery monitor amp and pin current for VC1 to VC3 (Test circuit 3)

Voltage gain of the battery monitor amp for each cell is defined by the input offset voltage and the measurement result

provided from the VBATOUT pin for the combination of the CTL3 pin and CTL4 pin expressed by the following table at

the condition where V1 = V2 = V3 = V4 = 3.5 V. Pin current for VC1 to VC3, IVCn and IVCnN are at the same time

measured.

CTL3 pin status

VCTL3H min.

Open

VCTL3L max.

CTL4 pin status

VCTL4H min.

Open

VCTL4L max.

VCTL4H min.

Open

VCTL4L max.

VCTL4H min.

Open

Table 8

VBATOUT pin output

VOFF1

VBAT1

VOFF2

VBAT2

VOFF3

VBAT3

VOFF4

VBAT4

VCn (n = 1, 2, 3) pin current

IVC1 at VC1 pin

IVC2 at VC2 pin

IVC3 at VC3 pin

IVCnN at VCn pin (n = 1, 2, 3)

Voltage gain of the battery monitor amp for each cell is calculated by the equation

GAMPn = (VBATnâVOFFn) / Vn (n = 1 to 4)

▷