S-8244 Datasheet, PDF (9/27 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC FOR 1-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION)

BATTERY PROTECTION IC FOR 1-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION)
Rev.3.3_00
S-8244 Series
(4) Test Condition 4, Test Circuit 1
Conditions:
• Set switches 1 and 2 to OFF for CMOS output models.
• Set switch 1 to ON and switch 2 to OFF for Nch open drain models.
• Set switch 1 to OFF and switch 2 to ON for Pch open drain models.
Definitions:
• Set V1, V2, V3 and V4 to 3.5 V and gradually increase V4.
Overcharge detection voltage 4 (V_CU4) is defined as V4 voltage when CO is turned to “H” (for
CMOS output active “H” or Nch open drain) or “L” (for CMOS output active “L” or Pch open
drain).
• Next, gradually decrease V4.
Overcharge hysteresis voltage (V_CD4) is defined as a difference between V_CU4 and V4 when CO
is turned to “L” (for CMOS output active “H” or Nch open drain) or “H” (for CMOS output active
“L” or Pch open drain).
(5) Test Condition 5, Test Circuit 2
Conditions:
• Set switches 1 and 2 to OFF for CMOS output models.
• Set switch 1 to ON and switch 2 to OFF for Nch open drain models.
• Set switch 1 to OFF and switch 2 to ON for Pch open drain models.
Definition:
• Set V1, V2, V3 and V4 to 3.5 V and momentarily rise V1 to 4.7 V within 10 µs.
Overcharge detection delay time (t_CU) is the period from when V1 goes 4.7 V to when CO is
turned to “H” (for CMOS output active “H” or Nch open drain) or “L” (for CMOS output active “L”
or Pch open drain).
(6) Test Condition 6, Test Circuit 3
Conditions:
• Set V1, V2, V3 and V4 to 2.3 V.
• Measure current consumption (I1).
Definition:
• The current consumption (I1) is defined as current consumption at power down (I_PDN).
Conditions:
• Set V1, V2, V3 and V4 to 3.5 V.
• Measure current consumption I1, I2, I3, and I4.
Definition:
•The current consumption (I1) is defined as current consumption during normal operation (I_OPE), the
current consumption (I2) as VC1 sink current (I_VC1), the current consumption (I3) as VC2 sink current
(I_VC2), and the current consumption (I4) as VC3 sink current (I_VC3), respectively.
Seiko Instruments Inc.
9