SI9730 Datasheet, PDF (4/14 Pages) Vishay Siliconix – Dual-Cell Lithium Ion Battery Control IC

Si9730
Vishay Siliconix
TIMING DIAGRAMS
V_M Waveform
V_SS
50%
200 mV
t_r x 100 nS
DCO Waveform
V_SS
50%
t_OCC
High
FIGURE 1. OC Load Detect
I_S Input
V_SS
V_DD
DCO Waveform
V_SS
50%
t_ILIMIT
60 mV
t_r x 100 nS
50%
FIGURE 2. Current-Limit Comparator Response Time
V_M Waveform
V_DD
(After Short is
Removed)
V_SS
V_RTH
V_DD
DCO Waveform
V_SS
V_RTH = V_M − V_SS at DCO Transition
FIGURE 3. Reset Threshold
4.4 V
V_C2 Waveform
4.0 V
C Waveform
V_SS
t_DL20C
+
32
30
t₃₀
t₃₀
1
31
FIGURE 4. DL2 Time (Over-Charge)
V_SS
V_M Waveform
+
V_{CHPD −}
DCO Waveform
Low
High
V_CHPD = V_SS − V_M at DCO Transition
FIGURE 6. Power-Down Charger Detect Threshold
2.6 V
V_C2 Waveform
2.0 V
C Waveform
V_SS
t_DL20DC
+
32
30
t₃₀
t₃₀
1
31
FIGURE 5. DL2 Time (Over-Discharge)
V_M Waveform
V_SS
^V_RTH
DCO Waveform
V_DD
t_pw
V_SS
FIGURE 7. Load Detection in Overcharge Mode
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4
Document Number: 70658
S-40135—Rev. F, 16-Feb-04