LV8098CS Datasheet, PDF (7/8 Pages) Sanyo Semicon Device – Constant-current Driver IC

LV8098CS
The standard data transfer to this device consists of three bytes : the slave address of the first byte and the data of the
second and third bytes.
Slave address : 0110011(0)
PD : Power-down
D1-D7 : 8-bit data used to set output constant current ; MIN = 00000000, MAX = 11111111
The table below shows the format of the second and third bytes.
Serial data bits
Function
2nd byte
3rd byte
SD7 SD6 SD5 SD4 SD3 SD2 SD1 SD0 SD7 SD6 SD5 SD4 SD3 SD2 SD1 SD0
PD × D7 D6 D5 D4 D3 D2 D1 D0 ×
×
×
×
×
×
PD bit setting method PD = 1 → Power_down (standby mode) and reset
D0-D7 setting method
Output setting
Current setting code
D7
D6
D5
D4
D3
D2
D1
(LSB)
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
1
1
2
0
0
0
0
0
1
0
2
Output current (mA)
(design value)
0
0.392
0.784
254
1
1
1
1
1
1
0
254
255
1
1
1
1
1
1
1
255
99.608
100
Relationship between the ENA pin input, I²C input data PD, and current setting 0 (code 0)
This IC supports the following three modes of setting up the standby mode :
1) Setting the ENA pin low.
2) Setting the PD bit to 1 (high) with I²C input data.
3) Setting the output current to 0 with I²C input data.
Execution of one of the steps 1) to 3) causes the output current to 0 and stops operation of the circuit.
When the ENA pin is set low, the I²C data register is reset and the IC is reset to its default state (PD bit set to 0 and output
current setting to code 0).
Since the IC starts operation in the data reset state at power-on time, it is necessary to start using the IC in the default state
by setting the ENA pin low before turning on VCC and then high after VCC is established.
No.A1515-7/8