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PDF LTC4150 Data sheet ( Hoja de datos )
| Número de pieza | LTC4150 | |
| Descripción | Coulomb Counter/ Battery Gas Gauge | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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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
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1 page  
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
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5 Page 
PACKAGE DESCRIPTIO
MS Package
10-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1661)
0.889 ± 0.127
(.035 ± .005)
LTC4150
5.23
(.206)
MIN
3.20 – 3.45
(.126 – .136)
0.305 ± 0.038
(.0120 ± .0015)
TYP
0.50
(.0197)
BSC
RECOMMENDED SOLDER PAD LAYOUT
3.00 ± 0.102
(.118 ± .004)
(NOTE 3)
10 9 8 7 6
0.497 ± 0.076
(.0196 ± .003)
REF
0.254
(.010)
DETAIL “A”
0° – 6° TYP
4.90 ± 0.152
(.193 ± .006)
3.00 ± 0.102
(.118 ± .004)
(NOTE 4)
GAUGE PLANE
12345
0.18
(.007)
0.53 ± 0.152
(.021 ± .006)
DETAIL “A”
1.10
(.043)
MAX
0.86
(.034)
REF
SEATING
PLANE 0.17 – 0.27
NOTE:
1. DIMENSIONS IN MILLIMETER/(INCH)
(.007 – .011)
TYP
0.50
(.0197)
BSC
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
0.127 ± 0.076
(.005 ± .003)
MSOP (MS) 0603
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
4150fa
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LTC4150.PDF ] | |
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