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MAX16805 Datenblatt(PDF) 13 Page - Maxim Integrated Products

Teilenummer MAX16805
Bauteilbeschribung  EEPROM-Programmable, High-Voltage, 350mA LED Drivers with LED Current Foldback
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Hersteller  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX16805 Datenblatt(HTML) 13 Page - Maxim Integrated Products

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EEPROM-Programmable, High-Voltage, 350mA
LED Drivers with LED Current Foldback
______________________________________________________________________________________
13
Message Format
Write to the MAX16805/MAX16806 by transmitting the
device’s slave address with R/W, 8th bit set to zero fol-
lowed by at least 1 byte of information (Figure 7). The
first byte of information is the command byte. The bytes
received after the command byte are the data bytes.
The first data byte goes into the internal register as
selected by the command byte (Figure 8). If there is
more than one data byte, the MAX16805/MAX16806
auto-increment to the next register address locations to
write the subsequent data bytes. The MAX16805/
MAX16806 auto-increment up to the register address
0x05, EEPROM Content Transfer register.
A read operation is performed as follows:
After the START condition (S), a 7-bit slave ID is sent
followed by an 8th bit (R/W) set to zero. A register
address is then sent to specify the address location
from which the read has to take place. To complete a
read operation, the master needs to generate a repeat-
ed START (Sr) followed by the 7-bit slave ID but with
the 8th bit (R/W) set to "1" this time indicating a read
operation. On the other hand, a read operation can be
performed by sending in the 7-bit slave ID followed by
an 8th bit (R/W) set to "1" if the current address location
happens to be the address location from which data
needs to be read.
ACKNOWLEDGE FROM
MAX16805/MAX16806
ACKNOWLEDGE FROM
MAX16805/MAX16806
0
S
A
AP
RW
SLAVE ADDRESS
COMMAND BYTE
Figure 7. Command Byte Received
ACKNOWLEDGE FROM
MAX16805/MAX16806
ACKNOWLEDGE FROM
MAX16805/MAX16806
ACKNOWLEDGE FROM
MAX16805/MAX16806
RW
COMMAND BYTE
1 BYTE
DATA BYTE
SLAVE ADDRESS
A
A
0
S
A
P
Figure 8. Command and a Single Data Byte Received
REGISTER NAME
REGISTER
ADDRESS
NO. OF BITS/
REGISTER
Binning Adjustment
0x00
4
Ramp Peak
0x01
3
LED Current Foldback
Threshold (LED_CFT)
0x02
4
Thermal Foldback Knee Point
0x03
4
Thermal Foldback Slope
Gain
0x04
2
Thermal Foldback Clamp
Level
0x05
3
EEPROM Content Transfer
0x06
EEPROM Program Enable
0x08
Password Register
0xFF
Table 2. Registers Address


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