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參數(shù)資料
| 型號： | MBI5170CN |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 8-Bit Constant Current LED Sink Driver with Gain Control |
| 中文描述： | 8位恒流增益控制LED驅動器 |
| 文件頁數(shù)： | 20/24頁 |
| 文件大?。?/td> | 400K |
| 代理商： | MBI5170CN |
MBI5170 8-Bit Constant Current LED Sink 8-Bit Constant Current LED Sink Driver with Gain Control
August 2004, VA.00
- 20 -
T iming Chart for Current Adjust Mode (An Example)
Resuming to the
Normal Mode
1
2
3
4
5
Note 3:
The LE/MOD/CA pulse writes the Configuration
Codes to each MBI5170.
SDO, N-1
MBI5170,
N-1
-
-CM
C
LE/MOD/CA Pulse (Note 3)
LE/MOD/CA
SDO, 1
SDI, 1
MBI5170, 1
SDO, 0
CC5 CC4 CC3 CC2 CC1
HC
-CM
CC0
-CM
-
HC
-CM
N of MBI5170 are connected in cascade, i.e., SDO, k --> SDI, k+1.
And, all MBI5170 are connected to the same signal bus CLK, LE/MOD/CA and
OE
/SW.
Note 2:
Voltage Gain VG = (1+ HC) x (1 + D/64)/4
D = CC0 x 2
+ CC1 x 2
+ CC2 x 2
+ CC3 x 2
2
+
CC4 x 2
+ CC5 x 2
.
Current Gain CG = VG * 3^(CM-1)
N x 8 CLK pulses are required to
shift the 8-bit Configuration Codes
needed by N of MBI5170.
MBI5170
,
0
SDI, 0
SDO, 2
MBI5170, 2
Writing the Configuration Codes,
Code k, k = 0
…
(N x 8
–
1)
N x 8 CLK Pulses (Note 1)
Configuration Codes (Note 1) (Note2)
B
1
2
3
4
5
Entering the Current
Adjust Mode
SDI, 0
A
CC5 CC4 CC3 CC2 CC1 CC0 HC
CLK
LE/MOD/CA
OE
/SW
CLK
MBI5170,
N-2
OE
/SW
CC5 CC4 CC3 CC2 CC1 CC0
For MBI5170, 1
For MBI5170, 0
CC5 CC4 CC3 CC2 CC1 CC0 HC
For MBI5170, N- 1
For MBI5170, N-2
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