U2403B Datasheet, PDF (4/12 Pages) TEMIC Semiconductors – Charge Timer

U2403B
4 (12)
start
no
Battery
inserted
Turn on V_S > 3.5 V
V₃ = 1.5 V
LED₂ “ON”
Timer start
Test
mode
Open GND VS
Divider ^{226 217 28}
yes
T_j > T_max
no
V₁ < 3.0 V
yes
no
[ V₃ 0 V
Interrupt charging
LED₂ “OFF”
Interrupt
no
T_j < T_max
yes
no
V₁ > V_S
yes
V₃ = 0 V
Continuous charging
LED₂ “ON”
Continuous timing
no
End of
timing
yes
LED₂ “OFF”
LED₁ “ON”
Trickle charge mode
V₃ = 100 mV
Battery
no
removed
yes
Undervoltage reset
Figure 3. Flow chart
95 9624
TELEFUNKEN Semiconductors
Rev. A1, 20-Mar-96