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bq24073RGTT Datasheet(PDF) 6 Page - Texas Instruments

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Part # bq24073RGTT
Description  1.5A USB-FRIENDLY Li-Ion BATTERY CHARGER AND POWER-PATH MANAGEMENT IC
Download  39 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

bq24073RGTT Datasheet(HTML) 6 Page - Texas Instruments

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1
2
3
4
12
11
10
9
ILIM
OUT
OUT
CHG
TS
BAT
BAT
CE
16 15 14 13
5
6
7
8
bq24075
bq24079
1
2
3
4
12
11
10
9
ILIM
OUT
OUT
CHG
TS
BAT
BAT
CE
16 15 14 13
5
6
7
8
bq24074
1
2
3
4
12
11
10
9
ILIM
OUT
OUT
CHG
TS
BAT
BAT
CE
16 15 14 13
5
6
7
8
bq24072
bq24073
bq24072, bq24073
bq24074, bq24075, bq24079
SLUS810D – SEPTEMBER 2008 – REVISED JUNE 2009................................................................................................................................................. www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
Over junction temperature range (0°
≤ TJ ≤ 125°C) and the recommended supply voltage range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
LOGIC LEVELS ON EN1, EN2, CE, SYSOFF, TD
VIL
Logic LOW input voltage
0
0.4
V
VIH
Logic HIGH input voltage
1.4
6
V
IIL
Input sink current
VIL= 0V
1
µA
IIH
Input source current
VIH= 1.4V
10
µA
LOGIC LEVELS ON PGOOD, CHG
VOL
Output LOW voltage
ISINK = 5 mA
0.4
V
RGT PACKAGE
(Top View)
PIN FUNCTIONS
PIN
NO.
I/O
DESCRIPTION
NAME
'72, '73
'74
'75, '79
External NTC Thermistor Input. Connect the TS input to the NTC thermistor in the battery pack. TS monitors
TS
1
1
1
I
a 10k
Ω 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
BAT
2, 3
2, 3
2, 3
I/O
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
CE
4
4
4
I
logic level to enable the battery charger. CE is internally pulled down with ~285 k
Ω. Do not leave CE
unconnected to ensure proper operation.
EN2
5
5
5
I
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
EN1
6
6
6
I
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
PGOOD
7
7
7
O
detected. PGOOD is high-impedance when the input power is not within specified limits. Connect PGOOD to
the desired logic voltage rail using a 1k
Ω-100kΩ resistor, or use with an LED for visual indication.
VSS
8
8
8
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
CHG
9
9
9
O
impedance when charging is complete and when charger is disabled. Connect CHG to the desired logic
voltage rail using a 1k
Ω-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 VBAT except
OUT
10, 11
10, 11
10, 11
O
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
ILIM
12
12
12
I
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
IN
13
13
13
I
can accept voltages up to 26V without damage but operation is suspended. Connect bypass capacitor 1
µF
to 10
µF to VSS.
6
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Copyright © 2008–2009, Texas Instruments Incorporated
Product Folder Link(s): bq24072 bq24073 bq24074 bq24075, bq24079


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