English
Language : 

BQ24165 Datasheet, PDF (16/35 Pages) Texas Instruments – 2.5A, Dual-Input, Single Cell Switch Mode Li-Ion Battery Charger with Power Path
◁
bq24165
bq24166
bq24167
SLUSAP4A – DECEMBER 2011 – REVISED MARCH 2012
www.ti.com
current to maintain the load on SYS while preventing the system voltage from crashing. If the charge current is
reduced to zero and the load increases further, the bq24165/6/7 enters battery supplement mode. During
supplement mode, the battery FET is turned on and the battery supplements the system load. When the charge
current is reduced by the DPPM regulation loop, the safety timer runs at half speed, so that it is twice a long.
This prevents false safety timer faults. See the Safety Timer section for more details.
2000 mA
1800 mA
IOUT
800 mA
0 mA
1500 mA
IIN ~850 mA
0 mA
1A
IBAT
0 mA
–200 mA
VSYS(REG)
VMINSYS
VOUT
~3.1 V
DPPM Loop Active
Supplement
Mode
Figure 21. Example DPPM Response (VSupply = 5 V, VBAT = 3.1V, 1.5A Input current limit)
If the VBAT(REG) threshold is ever less than the battery voltage, the battery FET is turned off and the SYS output is
regulated to VSYSREG(FETOFF). If the battery is ever 5% above the regulation threshold, the battery OVP circuit
shuts the PWM converter off and the battery FET is turned on to discharge the battery to safe operating levels.
The input current limit for the USB input is set by the IUSB1, IUSB2, and IUSB3 inputs. The bq24165/6/7
incorporates all of the necessary input current limits to support USB2.0 and USB3.0 standards as well as 1.5A to
support wall adapters. Driving IUSB1, IUSB2, and IUSB3 all high places the bq24165/6/7 in High Impedance
mode where the buck converter is shutdown regardless if an input is connected to USB or IN. Table 1 shows the
configuration for IUSB1 – IUSB3. When USB100 mode is selected, termination is disabled.
IUSB3
0
0
0
0
1
1
1
1
IUSB2
0
0
1
1
0
0
1
1
Table 1. USB1, USB2 and USB3 Input Table
IUSB1
0
1
0
1
0
1
0
1
Input Current Limit
100 mA
500 mA
1.5 A
USB Suspend
150 mA
900 mA
800 mA
High Impedance Mode
VINDPM Threshold
4.28 V
4.44 V
4.44 V
None
4.28 V
4.44 V
4.44 V
None
16
Submit Documentation Feedback
Copyright © 2011–2012, Texas Instruments Incorporated
Product Folder Link(s): bq24165 bq24166 bq24167
 ▷