LDS8141-002-T2 IXYS, LDS8141-002-T2 Datasheet - Page 9

• Manufacturer Part Number: LDS8141-002-T2
• Description: IC LED DRIVER WHIT BCKLGT 16WQFN
• Manufacturer: IXYS
• Series: LED-Sense™, Power-Lite™r
• Type: Backlight, White LED (I²C Interface)r

Specifications of LDS8141-002-T2

• Topology: High Side, Linear (LDO), PWM
• Number Of Outputs: 4
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 1.2MHz
• Voltage - Supply: 2.5 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 16-WQFN, 16-miniQFN
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 32mA
• 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: LDS8141-002-T2-2

LDS8161/41
Table 8: LDS8161 / 41 Temperature De-rating LUT Register Allocation
(data stored is  PWM code per each temperature point)
Table 9: Valid ΔPWM Codes vs. Number of Adjustment Steps for LDS8161/ 41 De-rating
PROGRAMMING EXAMPLES
Set 20 mA current at Bank LEDA
Set 30 mA at LEDA, 30 mA at LEDB, & 20 mA at LEDC banks
Turn LEDs A1, B1 and C1 on, all others off
Turn LEDs A2, B2, and C2 on, all others off
Turn all LEDs on
Set Bank A,B,C PWM duty Cycle at 50% (-6 dB)
Disable Temperature De-rating (DT_Adjust_disable)
Re-Enable Temperature De-rating
Short/open LED diagnostic request
Read out LED short to GND status
Read out LED short to V
Set Standby Mode
Resume normal operation from standby mode
Calibration request (conduct temperature calibration)
Set LEDs in shutdown mode at junction temperature above 100
Set Ta-Tj offset for LED and Si Diode to -20ºC
Software Reset (to default values) and/or clear of all registers
© 2009 IXYS Corp.
Characteristics subject to change without notice
Number of
Not Used
steps
Register
Address
Note:
-7
-6
-5
56h
57h
58h
59h
XX – The LDS8160 I
YY – The LDS8160 I
001 0001 (see Table 8), XX = 0010 0011 (bin) = 23h
001 0001 (see Table 8), YY = 0010 0010 (bin) = 22h
Binary
Code
1000
1001
1010
1011
7 – 4
30
40
50
60
IN
ΔPWM code for
temperature,
/open status
Data bits
Operation
2
2
C customer-selected slave address followed by binary 1 for write command, i.e. if I
C customer-selected slave address followed by binary 0 for read command, i.e. if I
Number of
steps
-4
-3
-2
-1
3 – 0
0
C
25
35
45
55
Binary
Code
1100
1101
1110
1111
Register
Address
9
5Ch
5Dh
5Ah
5Bh
Number of
Not Used
Not Used
Not Used
steps
0
C
0
Register
Address
7 – 4
1Eh
1Eh
1Ch
1Dh
1Fh
1Fh
1Fh
4Ah
1Fh
100
00h
00h
03h
03h
03h
05h
19h
49h
70
80
90
Δ PWM code for
temperature,
Binary
Code
0000
0001
0010
0011
Data bits
Register Data
F0h F0h A0h
Doc. No. 8141/61_DS, Rev. N1.0
3 – 0
DCh
CCh
0
A0h
15h
24h
3Fh
04h
00h
20h
40h
00h
10h
1Bh
80h
Number of
65
75
85
95
C
Not Used
Not Used
Not Used
Not Used
steps
2
2
C slave address is
C slave address is
XX 00 A0
XX F0 F0 A0
XX 03 15
XX 03 24
XX 03 3F
XX 05 DC
XX 1E 04
XX 1E 00
XX 19 20
XX 1C YY
XX 1D YY
XX 1F 40
XX 1F 00
XX 1F 10
XX 4A 1B
XX 49 CC
XX 1F 80
Command
(hex)
Binary
Code
0100
0101
0110
0111