Datasheet

bq24030, bq24031
bq24032A, bq24035, bq24038
SLUS618H –AUGUST 2004–REVISED OCTOBER 2009............................................................................................................................................... www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
DESCRIPTION (CONTINUED)
The power select pin, PSEL, defines which input source is to be used first (primary source – AC or USB). If the
primary source is not available, then the IC automatically switches over to the other secondary source if available
or the battery as the last option. If the PSEL is set low, the USB input is selected first and if not available, the AC
line is selected (if available) but programmed to a USB input limiting rate (100 mA/500 mA max). This feature
allows the use of one input connector, where the host programs the PSEL pin according to what source is
connected (AC adaptor or USB port).
The bq24038 replaces USBPG with pin VBSEL, to enable user selection of the charge voltage. In addition, pin
ACPG was modified to PG. PG is active low when either ac power or USB power is detected.
The ISET1 pin programs the battery's fast charge constant current level with a resistor. During normal AC
operation, the input supply provides power to both the OUT (System) and BAT pins. For peak or excessive loads
(typically when operating from the USB power, PSEL = Low) that would cause the input source to enter current
limit (or Q3 - USB FET limiting current) and its source and system voltage (OUT pin) to drop, the dynamic
power-path management (DPPM) feature reduces the charging current attempting to prevent any further drop in
system voltage. This feature allows the selection of a lower current rated adaptor based on the average load
(I
SYS-AVG
+ I
BAT-PGM
) rather than a high peak transient load.
ORDERING INFORMATION
(1)
BATTERY OUT PIN FOR AC PART PACKAGE
T
A
VOLTAGE (V) INPUT CONDITIONS
(2)
NUMBER
(3) (4)
MARKING
4.2 Regulated to 6 V
(5)
bq24030RHLR ANB
4.2 Regulated to 6 V
(5)
bq24030RHLT ANB
4.1 Regulated to 6 V
(5)
bq24031RHLR BZJ
4.1 Regulated to 6 V
(5)
bq24031RHLT BZJ
4.2 Regulated to 4.4 V
(5)
bq24032ARHLR BPE
–40°C to 125°C
4.2 Regulated to 4.4 V
(5)
bq24032ARHLT BPE
4.2 Cutoff for AC overvoltage
(6)
bq24035RHLR ANA
4.2 Cutoff for AC overvoltage
(6)
bq24035RHLT ANA
4.2/4.36 Selectable Regulated to 4.4 V bq24038RHLR BOW
4.2/4.36 Selectable Regulated to 4.4 V bq24038RHLT BOW
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
Web site at www.ti.com.
(2) When power is applied via the USB pin (PSEL=low), the input voltage is switched straight through to the OUT pin, unless the USB input
current limit is active, and then the OUT pin voltage will typically drop to the DPPM-OUT threshold or Battery voltage (which ever is
higher).
(3) The RHL package is available in the following options:
R - taped and reeled in quantities of 3,000 devices per reel.
T - taped and reeled in quantities of 250 devices per reel.
(4) This product is RoHS compatible, including a lead concentration that does not exceed 0.1% of total product weight, and is suitable for
use in specified lead-free soldering processes. In addition, this product uses package materials that do not contain halogens, including
bromine (Br) or antimony (Sb) above 0.1% of total product weight.
(5) If AC < V
O(OUT-REG)
, the AC is connected to the OUT pin by a P-FET, (Q1).
(6) If AC > V
(CUT-OFF)
the P-FET disconnects the OUT pin from the AC.
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Product Folder Link(s): bq24030, bq24031 bq24032A, bq24035, bq24038