SLUS810D – SEPTEMBER 2008 – REVISED JUNE 2009.................................................................................................................................................
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ELECTRICAL CHARACTERISTICS (continued)
Over junction temperature range (0°
≤
T
J
≤
125°C) and the recommended supply voltage range (unless otherwise noted)
PARAMETER
LOGIC LEVELS ON EN1, EN2, CE, SYSOFF, TD
V
IL
V
IH
I
IL
I
IH
Logic LOW input voltage
Logic HIGH input voltage
Input sink current
Input source current
V
IL
= 0V
V
IH
= 1.4V
0
1.4
0.4
6
1
10
V
V
µA
µA
TEST CONDITIONS
MIN
TYP
MAX
UNIT
LOGIC LEVELS ON PGOOD, CHG
V
OL
Output LOW voltage
I
SINK
= 5 mA
0.4
V
RGT PACKAGE
(Top View)
ISET
ITERM
TMR
IN
ISET
SYSOFF
TMR
IN
16 15 14 13
12
bq24075
bq24079
10
9
5
6
7
8
11
TS
BAT
BAT
CE
1
2
3
4
16 15 14 13
12
bq24072
11
bq24073
10
9
5
6
7
8
ISET
TD
TMR
IN
ILIM
OUT
OUT
CHG
TS
BAT
BAT
CE
1
2
3
4
16 15 14 13
12
11
bq24074
10
9
5
6
7
8
ILIM
OUT
OUT
CHG
TS
BAT
BAT
CE
1
2
3
4
ILIM
OUT
OUT
CHG
EN2
EN1
PGOOD
DESCRIPTION
EN2
EN1
PGOOD
VSS
EN2
EN1
PGOOD
PIN FUNCTIONS
PIN
NAME
NO.
'72, '73
1
'74
1
'75, '79
1
I
External NTC Thermistor Input. Connect the TS input to the NTC thermistor in the battery pack. TS monitors
a 10kΩ NTC thermistor. For applications that do not utilize the TS function, connect a 10kΩ fixed resistor
from TS to VSS to maintain a valid voltage level on TS.
Charger Power Stage Output and Battery Voltage Sense Input. Connect BAT to the positive terminal of the
battery. Bypass BAT to VSS with a 4.7
µF
to 47
µF
ceramic capacitor.
Charge Enable Active-Low Input. Connect CE to a high logic level to place the battery charger in standby
mode. In standby mode, OUT is active and battery supplement mode is still available. Connect CE to a low
logic level to enable the battery charger. CE is internally pulled down with ~285 kΩ. Do not leave CE
unconnected to ensure proper operation.
Input Current Limit Configuration Inputs. Use EN1 and EN2 control the maximum input current and enable
USB compliance. See Table 2 for the description of the operation states. EN1 and EN2 are internally pulled
down with
≈285
kΩ. Do not leave EN1 or EN2 unconnected to ensure proper operation.
Open-drain Power Good Status Indication Output. PGOOD pulls to VSS when a valid input source is
detected. PGOOD is high-impedance when the input power is not within specified limits. Connect PGOOD to
the desired logic voltage rail using a 1kΩ-100kΩ resistor, or use with an LED for visual indication.
Ground. Connect to the thermal pad and to the ground rail of the circuit.
Open-Drain Charging Status Indication Output. CHG pulls to VSS when the battery is charging. CHG is high
impedance when charging is complete and when charger is disabled. Connect CHG to the desired logic
voltage rail using a 1kΩ-100kΩ resistor, or use with an LED for visual indication.
System Supply Output. OUT provides a regulated output when the input is below the OVP threshold and
above the regulation voltage. When the input is out of the operation range, OUT is connected to V
BAT
except
when SYSOFF is high (bq24075 and bq24079 only). Connect OUT to the system load. Bypass OUT to VSS
with a 4.7
µF
to 47
µF
ceramic capacitor.
Adjustable Current Limit Programming Input. Connect a 1100
Ω
to 8 kΩ resistor from ILIM to VSS to program
the maximum input current (EN2=1, EN1=0). The input current includes the system load and the battery
charge current. Leaving ILIM unconnected disables all charging.
Input Power Connection. Connect IN to the external DC supply (AC adapter or USB port). The input operating
range is 4.35V to 6.6V (bq24072, bq24073, bq24075, and bq24079) or 4.35V to 10.5V (bq23074). The input
can accept voltages up to 26V without damage but operation is suspended. Connect bypass capacitor 1
µF
to 10
µF
to VSS.
I/O
TS
BAT
2, 3
2, 3
2, 3
I/O
CE
4
4
4
I
EN2
EN1
PGOOD
VSS
CHG
5
6
7
8
9
5
6
7
8
9
5
6
7
8
9
I
I
O
–
O
OUT
10, 11
10, 11
10, 11
O
ILIM
12
12
12
I
IN
13
13
13
I
6
VSS
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