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LDS8160
Table 2
Register
Digital Test Modes Register
Address
Bit 7 Bit 6
Bit 5
Bit 4
Bit 3 Bit 2
Bit 1
Bit 0
Factory
Diagnostics
PWM Ramp
PWM Fast
Factory
Post ADC
Factory
19h
0*
Only
0*
Request
0*
Bypass = 1
0*
Ramp = 1
PWM Slow
Ramp = 0*
Only
0*
Filter On =1
Filter
Bypass=0*
Only
0*
Note: *) Value by default
Table 3
Register
Configuration Register
Address
Bit 7
Bit 6
Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
120 = 0*
1Eh
RGB mode
with 3 LUTs
(3 PWM) =1*
WLED mode
with 1 LUT
(1 PWM) = 0
PWMs in
Linear
mode = 1
PWMs in
Logarithmic
mode = 0*
Factory
Only
(Leave set
to 0)
0*
Silicon
Diode
enable = 1
Silicon
Diode
disable = 0*
PWM starts
simultaneously
=1
PWMs
shifted by
0
dT adjust Soft Start
disable PWM Ramp
= 1* disabled
=1
dt _adjust Soft Ramp
enabled enabled
=0 = 0*
LP standby
mode
=1
Normal
standby
mode
= 0*
Note: *) Value by default
Table 4
Register
Control Register
Address
Bit 7
Bit 6
Bit 5
Bit 4 Bit 3
Bit 2
Bit 1
Bit 0
1Fh
Software
reset = 1
Normal
operation
= 0*
Standby
mode = 1
Normal
operation
= 0*
Temperature
request = 1
Normal
operation
= 0*
Calibration
request = 1
Normal
operation
= 0*
Custom
OSC trim
=1
Factory
preset
value =
0*
Osc trim 2
**
Osc trim 1
**
Osc trim 0
**
Note:
*) Value by default
**) Trim code defined by customer
Bit 7 = 1 — Software reset: resets device, all registers reset/cleared.
Bit 6 = 1 — Standby (oscillator disabled, all registers retain programmed values.)
Table 5: Ta-Tj Temperature Gradient Offset
( set offset code to match reference De-rate point in LUT from LED Tj to Ta. Typically LED and Si are equal)
Register
Control Register
Address
Bit 7
Bit 6
Bit 5
Bit 4 Bit 3
Bit 2
Bit 1
Bit 0
LED
LED
LED
LED
Si Diode
Si Diode
Si Diode
Si Diode
49h
Offset 3
0*
Offset 2
0*
Offset 1
0*
Offset 0
0*
Offset 3
0*
Offset 2
0*
Offset 1
0*
Offset 0
0*
Note:
*) Value by default
? 2009 IXYS Corp.
Characteristics subject to change without notice
9
Doc. No. 8160_DS, Rev. N1.0
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