TLC5955 Datasheet, PDF (32/53 Pages) Texas Instruments – TLC5955 48-Channel, 16-Bit, PWM LED Driver with DC, BC, LED Open-Short Detection, and Internal Current Setting

TLC5955
SBVS237 – MARCH 2014
www.ti.com
8.4.4.2 Enhanced Spectrum (ES) PWM Control
In this PWM control, the total display period is divided into 128 display segments. The total display period is the
time from the first GS clock (GSCLK) to the 65,536th GSCLK input. Each display segment has a maximum of
512 GSCLKs. The OUTXn on-time changes, depending on the 16-bit GS data. Refer to Table 12 for the
sequence of information and to Figure 28 for the timing information.
GS DATA
DECIMAL
0
1
2
3
4
5
6
HEX
0000h
0001h
0002h
0003h
0004h
0005h
0006h
—
—
127
007Fh
128
0080h
129
0081h
—
—
255
00FFh
256
0100h
257
0101h
—
—
65479
65480
65481
—
65534
65535
FEFFh
FF00h
FF01h
—
FFFEh
FFFFh
Table 12. ES PWM Drive Turn On-Time Length
OUTn DRIVER OPERATION
Does not turn on
Turns on for one GSCLK period in the first display segment
Turns on for one GSCLK period in the first and 65th display segments
Turns on for one GSCLK period in the first, 65th, and 33rd display segments
Turns on for one GSCLK period in the first, 65th, 33rd, and 97th display segments
Turns on for one GSCLK period in the first, 65th, 33rd, 97th, and 17th display segments
Turns on for one GSCLK period in the first, 65th, 33rd, 97th, 17th, and 81st display segments
The number of display segments where OUTn is turned on for one GSCLK is incremented by increasing GS data
in the following order:
1 > 65 > 33 > 97 > 17 > 81 > 49 > 113 > 9 > 73 > 41 > 105 > 25 > 89 > 57 > 121 > 5 > 69 > 37 > 101 > 21 > 85 >
53 > 117 > 13 > 77 > 45 > 109 > 29 > 93 > 61 > 125 > 3 > 67 > 35 > 99 > 19 > 83 > 51 > 115 > 11 > 75 > 43 >
107 > 27 > 91 > 59 > 123 > 7 > 71 > 39 > 103 > 23 > 87 > 55 > 119 > 15 > 79 > 47 > 111 > 31 > 95 > 63 > 127 >
2 > 66 > 34 > 98 > 18 > 82 > 50 > 114 > 10 > 74 > 42 > 106 > 26 > 90 > 58 > 122 > 6 > 70 > 38 > 102 > 22 > 86
> 54 > 118 > 14 > 78 > 46 > 110 > 30 > 94 > 62 > 126 > 4 > 68 > 36 > 100 > 20 > 84 > 52 > 116 > 12 > 76 > 44
> 108 > 28 > 92 > 60 > 124 > 8 > 72 > 40 > 104 > 24 > 88 > 56 > 120 > 16 > 80 > 48 > 112 > 32 > 96 > 64 >
128.
Turns on for one GSCLK period in the first to 127th display segments, but does not turn on in the 128th display
segment
Turns on for one GSCLK period in all display segments (first to 128th)
Turns on for two GSCLK periods in the first display period and for one GSCLK period in all other display periods
The number of display segments where OUTn is turned on for one GSCLK is incremented by increasing GS data
in the following order:
1 > 65 > 33 > 97 > 17 > 81 > 49 > 113 > 9 > 73 > 41 > 105 > 25 > 89 > 57 > 121 > 5 > 69 > 37 > 101 > 21 > 85 >
53 > 117 > 13 > 77 > 45 > 109 > 29 > 93 > 61 > 125 > 3 > 67 > 35 > 99 > 19 > 83 > 51 > 115 > 11 > 75 > 43 >
107 > 27 > 91 > 59 > 123 > 7 > 71 > 39 > 103 > 23 > 87 > 55 > 119 > 15 > 79 > 47 > 111 > 31 > 95 > 63 > 127 >
2 > 66 > 34 > 98 > 18 > 82 > 50 > 114 > 10 > 74 > 42 > 106 > 26 > 90 > 58 > 122 > 6 > 70 > 38 > 102 > 22 > 86
> 54 > 118 > 14 > 78 > 46 > 110 > 30 > 94 > 62 > 126 > 4 > 68 > 36 > 100 > 20 > 84 > 52 > 116 > 12 > 76 > 44
> 108 > 28 > 92 > 60 > 124 > 8 > 72 > 40 > 104 > 24 > 88 > 56 > 120 > 16 > 80 > 48 > 112 > 32 > 96 > 64 >
128.
Turns on for two GSCLK periods in the first to 127th display segments and turns on one GSCLK period in the
128th display segment
Turns on for two GSCLK periods in all display segments (first to 128th)
Turns on for three GSCLK periods in the first display segments and for two GSCLK periods in all other display
segments
The number of display segments where OUTn is turned on for one GSCLK is incremented by increasing GS data
in the following order:
1 > 65 > 33 > 97 > 17 > 81 > 49 > 113 > 9 > 73 > 41 > 105 > 25 > 89 > 57 > 121 > 5 > 69 > 37 > 101 > 21 > 85 >
53 > 117 > 13 > 77 > 45 > 109 > 29 > 93 > 61 > 125 > 3 > 67 > 35 > 99 > 19 > 83 > 51 > 115 > 11 > 75 > 43 >
107 > 27 > 91 > 59 > 123 > 7 > 71 > 39 > 103 > 23 > 87 > 55 > 119 > 15 > 79 > 47 > 111 > 31 > 95 > 63 > 127 >
2 > 66 > 34 > 98 > 18 > 82 > 50 > 114 > 10 > 74 > 42 > 106 > 26 > 90 > 58 > 122 > 6 > 70 > 38 > 102 > 22 > 86
> 54 > 118 > 14 > 78 > 46 > 110 > 30 > 94 > 62 > 126 > 4 > 68 > 36 > 100 > 20 > 84 > 52 > 116 > 12 > 76 > 44
> 108 > 28 > 92 > 60 > 124 > 8 > 72 > 40 > 104 > 24 > 88 > 56 > 120 > 16 > 80 > 48 > 112 > 32 > 96 > 64 >
128.
Turns on for 511 GSCLK periods in the first to 127th display segments, but only turns on for 510 GSCLK periods
in the 128th display segment
Turns on for 511 GSCLK periods in all display segments (first to 128th)
Turns on for 512 GSCLK periods in the first display period and for 511 GSCLK periods in the second to 128th
display segments
—
Turns on for 512 GSCLK periods in the first to 63rd and 65th to 127th display segments; also turns on for 511
GSCLK periods in the 64th and 128th display segments
Turns on for 512 GSCLK periods in the first to 127th display segments but only turns on for 511 GSCLK periods
in the 128th display segment
32
Submit Documentation Feedback
Product Folder Links: TLC5955
Copyright © 2014, Texas Instruments Incorporated