BQ24742 Datasheet, PDF (10/35 Pages) Texas Instruments – Li-Ion or Li-Polymer Battery Charger with Low Iq and Accurate Trickle Charge

bq24741, bq24742
SLUS875B – MARCH 2009 – REVISED OCTOBER 2009
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TYPICAL CHARACTERISTICS
Table 2. Table of Graphs⁽¹⁾ F_s=400 kHz, Ta = 25 °C
Y
X
VREF Load and Line Regulation
vs Load Current
REGN Load and Line Regulation
vs Load Current
BAT Voltage
vs VADJ/VDAC Ratio
BAT Voltage Regulation Accuracy
vs Setpoint
Charge Current
vs ISET/VDAC Ratio
Charge Current Regulation Accuracy
vs V(CSP-CSN) Setpoint
Input Current
vs ACSET/VDAC Radio
DPM Accuracy
vs V(ACP-ACN) Setpoint
BAT Voltage Regulation Accuracy
vs Charge Current
V_IADAPT Accuracy
vs V(ACP-ACN) Voltage
Trickle Charge Current
vs BAT Voltage
DPM and Charge Current
vs System Current
REF, REGN, and EXTPWR Startup (CE=HIGH)
Transient System Load (DPM) Response Transition
Transient Response of IADAPT and LPMOD
Battery Overcurrent Protection (OCP)
Battery to Ground Short Transition
Battery to Ground Short Protection
Charge Enable and Current Soft-Start
Charge Disable
Trickle Disable and Current Soft-Start
Synchronous to Non-synchronous Transition
Non-synchronous to Synchronous Transition
Continuous Conduction Mode Switching Waveforms
Near 100% Duty Cycle Bootstrap Recharge Pulse
Efficiency
vs Battery Charge Current
Switch Frequency
vs Setting Resistor
Figure
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15
Figure 16
Figure 17
Figure 18
Figure 19
Figure 20
Figure 21
Figure 22
Figure 23
Figure 24
Figure 25
Figure 26
Figure 27
Figure 28
Figure 29
(1) Test results based on Figure 2 application schematic. V_IN = 20 V, V_BAT = 3-cell Li-Ion, I_CHG = 3 A, I_{ADAPTER_LIMIT} = 4 A, T_A = 25°C,
unless otherwise specified.
10
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