BQ34Z110 Datasheet, PDF (2/11 Pages) Texas Instruments – Wide Range Fuel Gauge with Impedance Track™ for Lead-Acid Batteries

bq34z110
SLUSB55 – JUNE 2012
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
PIN-OUT DIAGRAM
PIN DETAILS
P2 1
14 ^P3/SDA
VEN 2
13 _P4/SCL
P1 3
12 P5/HDQ
BAT 4
11 P6/TS
CE 5
REGIN 6
REG25 7
10 SRN
9 SRP
8 VSS
Figure 1. bq34z110 Pin-Out Diagram
Table 1. bq34z110 External Pin Functions
PIN NAME
P2
VEN
PIN
NUMBER
1
2
P1
3
BAT
4
CE
5
REGIN
6
REG25
7
VSS
8
SRP
9
SRN
10
P6/TS
11
P5/HDQ
12
P4/SCL
13
P3/SDA
14
TYPE ⁽¹⁾
DESCRIPTION
O
LED 2 or Not Used (connect to Vss)
O
Active High Voltage Translation Enable. This signal is optionally used to switch the input voltage
divider on/off to reduce the power consumption (typ 45 uA) of the divider network.
O
LED 1 or Not Used (connect to Vss). This pin is also used to drive an LED for single-LED mode.
Use a small signal N-FET (Q1) in series with the LED as shown on Figure 9.
I
Translated Battery Voltage Input
I
Chip Enable. Internal LDO is disconnected from REGIN when driven low.
P
Internal integrated LDO input. Decouple with a 0.1-µF ceramic capacitor to Vss.
P
2.5-V Output voltage of the internal integrated LDO. Decouple with 1-µF ceramic capacitor to Vss
P
Device ground
I
Analog input pin connected to the internal coulomb-counter peripheral for integrating a small
voltage between SRP and SRN where SRP is nearest the BAT– connection.
I
Analog input pin connected to the internal coulomb-counter peripheral for integrating a small
voltage between SRP and SRN where SRN is nearest the PACK– connection.
I
Pack thermistor voltage sense (use 103AT-type thermistor)
I/O
Open drain HDQ Serial communication line (slave)
I
Slave I²C serial communication clock input. Use with a 10-K pull-up resistor (typical). Also used
for LED 4 in the four-LED mode.
I/O
Open drain slave I²C serial communication data line. Use with a 10-kΩ pull-up resistor (typical).
Also used for LED 3 in the four-LED mode.
(1) I = Input, O = Output, P = Power, I/O = Digital input/output
2
Submit Documentation Feedback
Product Folder Link(s): bq34z110
Copyright © 2012, Texas Instruments Incorporated