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PDF DS2436 Data sheet ( Hoja de datos )
| Número de pieza | DS2436 | |
| Descripción | Battery ID/Monitor Chip | |
| Fabricantes | Dallas Semiconducotr | |
| Logotipo |  |
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www.maxim-ic.com
FEATURES
Unique 1-Wire® interface requires only one
port pin for communication
Provides unique 64-bit identification number
to battery packs
On-board A/D converter monitors battery
voltage for end-of-charge and end-of-
discharge determination
Eliminates thermistors by sensing battery
temperature on-chip
256-bit nonvolatile user memory available
for storage of data such as fuel gauge and
manufacturing information
2-byte cycle counter
Operating range of -40°C to +85°C
Applications include portable computers,
portable/ cellular phones, consumer
electronics, and handheld instrumentation
DS2436
Battery ID/Monitor Chip
PACKAGE OUTLINE
DALLAS
DS2436
123
BOTTOM
NC
NC
DQ
GND
1
2
3
4
8 VDD
7 NC
6 NC
5 NC
DS2436B+
TO-92 PACKAGE
DS2436Z+
150-mil, 8-Pin SOIC
PIN DESCRIPTION
GND
- Ground
DQ - Data In/Out
VDD - Supply/Battery Connection
DESCRIPTION
The DS2436 Battery Identification/Monitor Chip provides a convenient method of tagging and
identifying battery packs by manufacturer, chemistry, or other identifying parameters. The DS2436
allows the battery pack to be coded with a unique 64-Bit ROM ID and a 16-Bit Manufacturer ID, and also
store information regarding the battery life and charge/ discharge characteristics in its nonvolatile
memory.
The DS2436 also performs the essential function of monitoring battery temperature, without the need for
a thermistor in the battery pack.
A cycle counter assists to determine the remaining cycle life of the battery.
Finally, the DS2436 measures battery voltage and sends that measured value to a host CPU for use in
end-of-charge or end-of-discharge determination or basic fuel gauge operation.
Information is sent to/from the DS2436 over a 1-Wire interface, so that battery packs need only have
three output connectors: power, ground, and the 1-Wire interface.
1-Wire is a registered trademark of Dallas Semiconductor.
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1 page  
DS2436 MEMORY MAP Figure 3
PAGE 1
SP1
OR
NV1
USER BYTE
USER BYTE
USER BYTE
USER BYTE
USER BYTE
USER BYTE
USER BYTE
USER BYTE
USER BYTE
USER BYTE
USER BYTE
USER BYTE
USER BYTE
USER BYTE
USER BYTE
USER BYTE
USER BYTE
USER BYTE
USER BYTE
USER BYTE
USER BYTE
USER BYTE
USER BYTE
USER BYTE
RESERVED
ADDRESS
SPACE
BYTE
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
ADDRESS
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
0Ah
0Bh
0Ch
0Dh
0Eh
0Fh
10h
11h
12h
13h
14h
15h
16h
17h
18h
31 1Fh
DS2436
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5 Page 
DS2436
TEMPERATURE REGISTERS (60h-61h)
The DS2436 can measure temperature without external components. The resulting temperature
measurement is placed in a two-byte Temperature Register. This register is implemented in SRAM, and
therefore will hold data until the battery voltage falls below minimum VDD.
The temperature reading is provided in a 13-bit, two’s complement format, with 0.03125°C resolution.
Table 1 describes the exact relationship of output data to measured temperature. The data is transmitted
serially over the 1-Wire interface. The DS2436 can measure temperature over the range of -40°C to
+85°C in 0.03125°C increments. For Fahrenheit usage, a lookup table or conversion factor must be used.
Note that temperature is represented in the DS2436 in terms of a 0.03125°C LSB, yielding the following
13-bit format:
MSB
LSB
S 26 25 24 23 22 21 20
2-1 2-2 2-3 2-4 2-5 0 0 0
Unit =1°C
The MSB of the Temperature Register contains the integer portion of the temperature valve.
TEMPERATURE/DATA RELATIONSHIPS Table 1
TEMPERATURE
+125 °C
DIGITAL OUTPUT (Binary)
01111101 00000000
+25.0625°C
00011001 00010000
+1/2°C
00000000 10000000
0°C 00000000 00000000
-1/2°C
11111111 10000000
-25.0625°C
11100110 11110000
-55°C
11001001 00000000
DIGITAL OUTPUT (Hex)
7B00
1910
0080
0000
FF80
E6F0
C900
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11 Page | ||
| Páginas | Total 29 Páginas | |
| PDF Descargar | [ Datasheet DS2436.PDF ] | |
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