LP3947ISD-51 National Semiconductor, LP3947ISD-51 Datasheet - Page 12

• Manufacturer Part Number: LP3947ISD-51
• Description: CHARGER, USB, I2C, POWERWISE, LLP-14
• Manufacturer: National Semiconductor

Specifications of LP3947ISD-51

• Battery Type: Li-Ion
• Input Voltage: 6V
• Battery Charge Voltage: 4.2V
• Charge Current Max: 750mA
• Battery Ic Case Style: LLP
• No. Of Pins: 14
• No. Of Series Cells: 1
• Operating Temperature Range: -40°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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Application Notes
Addrs
Numbers in parentheses indicate default setting. “0” bit is set to low state, and “1” bit is set to high state. R/O –Read Only, All other bits are Read and Write.
w = write (sda = “0”)
r = read (sda = “1”)
ack = acknowledge (sda pulled low by either master or slave)
Nack = No Acknowledge
rs = repeated start
8'h00
8'h01
8'h02
Register -1
Register -2
Register -3
Register
Charger
Charger
Charger
7
TABLE 3. LP3947 Serial Port Communication address code 7h’47
TABLE 4. Charger Current and EOC Current Programming Code
Data Code
4h'0A
4h'0B
4h'0C
4h'0D
4h'00
4h'01
4h'02
4h'03
4h'04
4h'05
4h'06
4h'07
4h'08
4h'09
(Continued)
6
5
FIGURE 7. LP3947 (Slave) Register Write
Selection Code I
LP3947 Control and Data Codes
(Green LED)
Batt Voltage
(0) = 4.1V
Charger Current
1 = 4.2V
EOC
R/O
4
100
150
200
250
300
350
400
450
500
550
600
650
700
750
SET
12
AC Adaptor
(Red LED)
(mA)
Charging
Charge
Current
Code 3
Charge
Current
Code 3
USB
R/O
(1)
(1)
3
End of Charge Current
Selection Code
AC Adaptor
0.15C
Charge
Current
Code 2
Charge
Current
Code 2
0.1C
0.2C
SEL-1
EOC
USB
(0)
(0)
(0)
2
AC Adaptor
20111012
Charge
Current
Code 1
Charge
Current
Code 1
SEL-0
EOC
USB
(0)
(1)
(0)
1
AC Adaptor
Charge
Current
Code 0
Charge
Current
Code 0
USB
(0)
(0)
0