LTC4150 Datasheet PDF - Linear Technology
Part Number | LTC4150 | |
Description | Coulomb Counter/ Battery Gas Gauge | |
Manufacturers | Linear Technology | |
Logo | ||
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LTC4150
Coulomb Counter/
Battery Gas Gauge
FEATURES
■ Indicates Charge Quantity and Polarity
■ ±50mV Sense Voltage Range
■ Precision Timer Capacitor or Crystal Not Required
■ 2.7V to 8.5V Operation
■ High Side Sense
■ 32.55Hz/V Charge Count Frequency
■ 1.5µA Shutdown Current
■ 10-Pin MSOP Package
U
APPLICATIO S
■ Battery Chargers
■ Palmtop Computers and PDAs
■ Cellular Telephones and Wireless Modems
DESCRIPTIO
The LTC®4150 measures battery depletion and charging in
handheld PC and portable product applications. The de-
vice monitors current through an external sense resistor
between the battery’s positive terminal and the battery’s
load or charger. A voltage-to-frequency converter trans-
forms the current sense voltage into a series of output
pulses at the interrupt pin. These pulses correspond to a
fixed quantity of charge flowing into or out of the battery.
The part also indicates charge polarity as the battery is
depleted or charged.
The LTC4150 is intended for 1-cell or 2-cell Li-Ion and
3-cell to 6-cell NiCd or NiMH applications.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
RSENSE
+
CHARGER
LOAD
4.7µF
4.7µF
SENSE – SENSE +
CF+
CF– LTC4150
VDD
INT
CLR
POL
GND SHDN
CHG
RL RL
DISCHG
µP
4150 TA01a
Integral Nonlinearity, % of Full Scale
0.5
0.4
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
–50
–25 0
25
CURRENT SENSE VOLTAGE (mV)
50
4150 TA01b
4150fa
1
|
|
BLOCK DIAGRA
LTC4150
CHARGER
LOAD
VDD
SENSE+
2k
RSENSE
IBAT
CF+
CF
CF–
SENSE –
2k
GND
REFHI
S3 1.7V
+
100pF
S1
200k
–
200k
AMPLIFIER
–
+
+
200k
–
S2
REFLO
0.95V
CONTROL
LOGIC
POLARITY
DETECTION
OFLOW/
UFLOW
COUNTER
UP/DN
SQ
R
Figure 1. Block Diagram
INT
CLR
CHARGE
POL
DISCHARGE
SHDN
4150 F01
TI I G DIAGRA S
CLR 50% 50%
tCLR
INT
4150 F02
Figure 2. CLR Pulse Width to Reset INT,
CLR and INT Not Connected
INT 50% 50%
tINT
4150 F03
Figure 3. INT Minimum Pulse Width, CLR and INT Connected
4150fa
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for LTC4150 electronic component. |
Information | Total 12 Pages | |
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Product Image and Detail view | 1. Battery Gas Gauge - Linear [ Learn More ] | |
Download | [ LTC4150.PDF Datasheet ] |
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