Texas Instruments bq24070, User Manual

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3 Performance Specification Summary
4 Test Summary
4.1 Equipment
4.2 Equipment Setup
10 to 30 W W
J4
J1
5.25 VDC
AC
GND
DMM
#1
DMM
#3
P/A
#1
DMM
#2
J2
+
+
+
–
–
–
TS
OUT
BAT+
B0136-01
(DC–)
BAT–
GND
HPA180 UUT
®
TP4
LDO
bq24070 Charger EVM
Li-Ion, Single-Cell,
1- to 2- A h Capacity
×
Performance Specification Summary
Table 1 summarizes the performance specifications of the EVM.
Table 1. Performance Specification Summary For bq24070 EVM
SPECIFICATION TEST CONDITIONS MIN TYP MAX UNITS
Input dc voltage, V
I(AC)
4.8 5 6.5
V
Input dc USB voltage, V
I(USB)
5
Battery charge current, I
O(CHG)
1 2+ A
Power dissipation, bq24070 IC, 1 cell P
DISS
= (V
IN
– V
OUT
)Iout + (V
IN
– See
(1)
W
V
BAT
)I
BAT
+ (V
IN
– V
LDO
)I
LDO
(1)
The HPA180 (bq24070) thermal design is optimized (8
+
vias, 0.031-inch PWB, 2 oz. copper) to give
θ
JA
~ 27°C/W.
This section covers the setup and tests performed in evaluating the EVM.
•
Power supply (5.25 ± 0.25 VDC), current limit set to 2.0 A ± 0.2 A for AC input to the UUT
•
Three Fluke 75 DMMs (equivalent or better)
•
Oscilloscope, Model TDS220 (equivalent or better)
•
Preset the UUT power supply voltage and current prior to connection to UUT; turn off the power supply
and connect the supply to J1-IN/GND (+ to IN and – to GND).
•
Connect a 10-
Ω
to 30-
Ω
load to J4-OUT/GND.
•
Connect a fully discharged (< 2.8-VDC) single-cell Li-ion or Li-polymer battery to J2-BAT+/BAT–.
•
Connect the DMMs as shown in Figure 1 .
Figure 1. Test Diagram
SLUU248 – May 2006 bq24070 1.5-A Single-Chip Li-Ion and Li-Pol Charge Management IC EVM 3
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