Rainbow Electronics MAX9634 - Manual (Page 8)

MAX9634
1µA, 4-Bump UCSP/SOT23,
Precision Current-Sense Amplifier
8 _______________________________________________________________________________________
Bidirectional Application
Battery-powered systems may require a precise bidi-
rectional current-sense amplifier to accurately monitor
the battery’s charge and discharge currents.
Measurements of the two separate outputs with respect
to GND yields an accurate measure of the charge and
discharge currents, respectively (Figure 1).
UCSP Applications Information
For the latest application details on UCSP construction,
dimensions, tape carrier information, PCB techniques,
bump-pad layout, and recommended reflow tempera-
ture profile, as well as the latest information on reliability
testing results, refer to Application Note 1891:
Wafer-
Level Packaging (WLP) and Its Applications .
.
Chip Information
PROCESS: BiCMOS
V
BATT
= 1.6V TO 28V
R SENSE
R
1
I LOAD
R OUT
R
1
GND
P
MAX9634
R
1
R OUT
R
1
GND
P
OUT OUT
TO WALL-CUBE/
CHARGER
MAX9634
RS+ RS- RS- RS+
ADC
ADC
LOAD
µC
V DD = 3.3V
10k Ω 10k Ω
Figure 1. Bidirectional Application