BQ24080-Q1 Datasheet, PDF (15/28 Pages) Texas Instruments – Li-Ion and Li-Pol Automotive Charger

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9 Application and Implementation
bq24080-Q1, bq24081-Q1
SLUSCB6 – MAY 2015
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
9.1 Application Information
The bq2408X-Q1 device is Lithium chemistry (Lithium Ion and Lithium Polymer) charger that is intended for
automotive applications. The allows the designer to pick an automotive qualified charger for applications where
the Li chemistry is needed. Such applications may involve E-Call (back up safety call) or infotainment systems
within the automotive space. The device comes completely ready with an integrated charge current monitor and
safety timers. The LDO based charger design allows for a cost optimized safe charging algorithm.
9.2 Typical Application
SOURCE
INPUT
VDC
GND
C₁
0.1 mF
bq24080-Q1
1 IN
OUT 10
1.5 kW
2 GND
CE 9
1.5 kW
PACK+
C₂
+
0.1 mF _PACK–
1.5 kW
3 STAT1 PG 8
4 STAT2 GND 7
5 V_SS
ISET 6
1.13 kW
R_SET
Charge Current
Translator Output
Figure 10. Typical Application Circuit
9.2.1 Design Requirements
For this design example, use the parameters shown in Table 2.
Table 2. Design Parameters
PARAMETER
Supply voltage
Fast-charge current
Battery-Temperature sense (bq24081-Q1)
VALUE
5V
≈ 750 mA
–2°C to 44.5°C (default setting)
Copyright © 2015, Texas Instruments Incorporated
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