LDS8160-002-T2 IXYS, LDS8160-002-T2 Datasheet - Page 8

• Manufacturer Part Number: LDS8160-002-T2
• Description: IC LED DVR WHT/RGB BCKLGT 16WQFN
• Manufacturer: IXYS
• Series: LED-Sense™, Power-Lite™r
• Type: Backlight, White LED, RGB (I²C Interface)r

Specifications of LDS8160-002-T2

• Topology: Linear (LDO), PWM
• Number Of Outputs: 6
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: RGB, White LED
• Frequency: 1.2MHz
• Voltage - Supply: 2.3 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 16-WQFN, 16-miniQFN
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 25mA
• Internal Switch(s): Yes
• Efficiency: 80%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Lead Free Status / Rohs Status: Details
• Other names: LDS8160-002-T2-2

LDS8160
Table 1
Register
Address
© 2009 IXYS Corp.
Characteristics subject to change without notice
ADDRESS
03h
A6h
C0h
D0h
D2h
D4h
D6h
D8h
DAh
DCh
A2h
A4h
DESCRIPTION
LED-A dV
LED-B dV
LED-C dV
Silicon diode η [7:0]
LED Tj offset [4:0]
Silicon diode Ta offset
[4:0]
Silicon diode R
[7:0]
LED-A Rs offset [7:0]
LED-B Rs offset [7:0]
LED-C Rs offset [7:0]
T
MIN
LED OT Flag
offset [7:0]
1 = OT
Bit 7
F
F
F
/dT [7:0]
/dT [7:0]
/dT [7:0]
s
offset
Bit 6
N/A
BITS
8
8
8
8
5
5
8
8
8
8
8
Enable
Channel Enable Register
Bit 5
C2
NOTES
User-loaded V
Banks A, B, C respectively.
Negative tracking assumed with temperature;
Bits from bit 7 to bit 5 represent integer part and
bits from bit 4 to bit 0 - fractional part of the coefficient
Example: Temperature coefficient = -2.26 mV/
Bit 7 – bit 5 = 2 (decimal) = 010 (bin), and
Bit 4 – bit 0 = INT{0.26 / 0.03125} = 8 (decimal) = 01000 (bin)
User loads 010 01000 (bin) = 48h = -2.25 (closest setting)
Silicon diode η (eta) or non-ideality factor:
Factory recommended loaded value = 1.0000 =
01000000(bin) = 40h
Bits from bit 7 to bit 6 represent integer part and
bits from bit 5 to bit 0 - fractional part (resolution = 0.015625
per LSB)
Example: η = 1.000;
Bit 7 – bit 6 = 1 (decimal) = 01 (bin), and
Bit 5 – bit 0 = INT{0.000 / 0.015625} = 0 (dec) = 000000 (bin)
User loads 01 000000 = 40h = 1.0000
LED Tj offset from Ta (user-loaded) – correction from ambient
temperature to LED junction temperature.
Factory default = 04h
Accounts for LED package thermal characteristics. See
Appendix 3 for details.
Silicon diode Tj offset from Ta – correction from ambient
temperature to Silicon diode junction temperature. Accounts
for LDS8160 package thermal characteristics. Factory default
= 02h
Silicon diode series resistance offset
Factory recommended loaded value = 04h (4 decimal) = ~ 68
Ω =Rs-si
Formula (decimal) = 8192 x [(Rs-si x 8 x 10
Rs offset (user-loaded) for Banks A, B, and C LEDs for
specific LEDs used.
User loads per LED used. (1/slope of high current region of
LED I-V characteristic).
Formula (decimal) = 8192 x [(Rs Ωx 8 x 10
Offset to establish minimum T-code = 0
This offset insures that -35C
default supplied (237 decimal = EDh)
8
Enable
Bit 4
C1
F
temperature coefficient for LEDs used at
Enable
Bit 3
B2
0
will equal T-code = 0. Factory
Enable
Bit 2
B1
Doc. No. 8160_DS, Rev. N1.0
-4
Enable
-6
Bit 1
A) / 1.14V]LEDs
A2
A)/1.14 V]
0
C;
Enable
Bit 0
A1