Datasheet
SDA
SCL
VSS
GPOUT
VSS
Pack+
Pack-
BIN
Load+(Host)
Charger-
SDA
SCL
Pack+
BAT
Pack-
Load+
Load-
GND
Optional
Optional
EXT
VSS
EXT
EXT
EXT
EXT
VDD
VDD
VDD
Charger+
Load-(Host)
BIN
Ext VDD
VDD
GPOUT
Application circuit only needs to include bq27421 and C1
Optional
A1
GPOUT
B1
BIN
C1
VSS
A2
SDA
B2
VSS
C2
SRX
A3
SCL
B3
VDD
C3
BAT
U1
BQ27421YZF
BQ27421YZF
C1
0.47uF
C2
1uF
R3
5.1k
R4
5.1k
1
2
3
4
J10
1
2
3
J5
1
2
J1
TP2
TP5
TP3
TP9
TP4
TP6
TP11
TP12
TP10
TP7
TP1
R1
4.7k
1
2
3
J2
1
2
3
J3
1
2
3
J8
1
2
3
J9
1
2
J4
R2
10 k
1
2
J6
1
2
J7
TP8
SDA
SCL
SCL
SDA
VDD
VDDVDD
EXT_VCC
EXT_VCC
VDD
EXT_VCC
EXT_VCC
www.ti.com
Circuit Module Physical Layout, Bill of Materials and Schematic
3.2 Bill of Material
Table 2. Bill of Materials
Count RefDes Value Description Size Part Number Mfr
1 C1 0.47uF Capacitor, Ceramic, 10V, X5R, 10% 0402
1 C2 1uF Capacitor, Ceramic, 6.3V, X5R, 10% 0402
4 J1, J4, J6, ED555/2DS Terminal Block, 2-pin, 6-A, 3.5mm 0.27 x 0.25 inch ED555/2DS OST
J7
4 J2, J3, J8, PEC36SAAN Header, Male 3-pin, 100mil spacing 0.100 inch x 3 PEC36SAAN Sullins
J9
1 J5 ED555/3DS Terminal Block, 3-pin, 6-A, 3.5mm 0.41 x 0.25 inch ED555/3DS OST
1 J10 22-05-3041 Header, Friction Lock Ass'y, 4-pin Right Angle 0.400 x 0.500 22-05-3041 Molex
1 R1 14.7k Resistor, Chip, 1/16-W, 5% 0402 Std Std
1 R2 10k Resistor, Chip, 1/16-W, 5% 0402 Std Std
2 R3, R4 5.1k Resistor, Chip, 1/16-W, 5% 0402 Std Std
4 TP1, TP7, 5001 Test Point, Black, Thru Hole Color Keyed 0.100 x 0.100 inch 5001 Keystone
TP9
7 TP2, TP3, 5002 Test Point, White, Thru Hole Color Keyed 0.100 x 0.100 inch 5002 Keystone
TP11, TP12
3 TP4, TP5, 5000 Test Point, Red, Thru Hole Color Keyed 0.100 x 0.100 inch 5000 Keystone
TP6, TP10
1 U1 bq27421YZF-G1x IC, Battery Monitor and Data Logger DSBGA bq27421-G1x TI
3.3 Schematic
Figure 6. bq27421EVM Schematic
3.4 bq27421 Circuits Module Performance Specification Summary
This section summarizes the performance specifications of the bq27421 circuit module.
7
SLUUA63–April 2013 bq27421 EVM: Single-Cell Impedance Track Technology
Submit Documentation Feedback
Copyright © 2013, Texas Instruments Incorporated