BQ24296_15 Datasheet, PDF (12/55 Pages) Texas Instruments – bq2429x I2C Controlled 3-A Single Cell USB Charger With Narrow VDC Power Path Management and Adjustable Voltage USB OTG

bq24296, bq24297
SLUSBP6B – SEPTEMBER 2013 – REVISED NOVEMBER 2014
95
90
85
80
75
70
VBUS = 5V
65
0
0.5
1
1.5
2
2.5
3
3.5
Charge Current (A)
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95
90
85
80
75
VBUS = 5V
70
0
0.5
1
1.5
2
2.5
3
Load Current (A)
Figure 2. Charge Efficiency vs Charge Current
100
95
90
85
80
75
70
65
60
0
VBAT = 3.2V
VBAT = 3.5V
VBAT = 3.8V
0.5
1
1.5
VBUS Load Current (A)
4
3.9
3.8
3.7
3.6
3.5
3.4
3.3
3.2
0
Figure 3. System Efficiency
vs System Load Current
SYSMIN = 3.5
SYSMIN = 3.2
SYSMIN = 3.7
0.5
1
1.5
2
2.5
3
3.5
System Load Current (A)
Figure 4. Boost Mode Efficiency
vs VBUS Load Current
5.1
5
4.9
4.8
4.7
4.6
VBAT = 3.2V
VBAT = 3.5V
VBAT = 3.8V
4.5
0
0.5
1
1.5
VBUS Load Current (A)
Typical Output = 4.998 V, REG06[7:4] = 0111
Figure 6. Boost Mode VBUS Voltage Regulation
vs VBUS Load Current
Figure 5. SYS Voltage Regulation
vs System Load Current
3.7
3.65
3.6
3.55
SYSMIN = 3.5V
3.5
-50 -25 0 25 50 75 100 125 150
Temperature (^oC)
Figure 7. SYS Voltage vs Temperature
12
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