Datasheet

ILIM
ILIM
IN_LIM
K
R =
I
0 mA
0 mA
V
SYS(REG)
V
OUT
I
BAT
I
IN
I
OUT
V
MINSYS
~3.1 V
Supplement
Mode
800 mA
1800 mA
2000 mA
–200 mA
1 A
1500 mA
~850 mA
0 mA
DPPM Loop Active
bq24165
bq24166
bq24167
www.ti.com SLUSAP4B –DECEMBER 2011–REVISED MARCH 2013
Figure 21. Example DPPM Response (V
Supply
= 5 V, V
BAT
= 3.1V, 1.5A Input current limit)
If the V
BAT(REG)
threshold is ever less than the battery voltage, the battery FET is turned off and the SYS output is
regulated to V
SYSREG(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.
Table 1. USB1, USB2 and USB3 Input Table
IUSB3 IUSB2 IUSB1 Input Current Limit V
INDPM
Threshold
0 0 0 100 mA 4.28 V
0 0 1 500 mA 4.44 V
0 1 0 1.5 A 4.44 V
0 1 1 High Impedance Mode None
1 0 0 150 mA 4.28 V
1 0 1 900 mA 4.44 V
1 1 0 800 mA 4.44 V
1 1 1 High Impedance Mode None
The input current limit for IN is programmable using the ILIM input. Connect a resistor from ILIM to GND to set
the maximum input current limit. The programmable range for the IN input current limit is 1000mA to 2.5A. R
ILIM
is calculated using Equation 2:
(2)
Copyright © 2011–2013, Texas Instruments Incorporated Submit Documentation Feedback 17
Product Folder Links: bq24165 bq24166 bq24167