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LM2756 Datasheet(PDF) 13 Page - Texas Instruments

Part # LM2756
Description  LM2756 Multi-Display Inductorless LED Driver with 32 Exponential Dimming Steps in DSBGA
PDF  24 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

LM2756 Datasheet(HTML) 13 Page - Texas Instruments

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background image
1
bit7
1
bit6
1
bit5
1
bit4
1
bit3
D1C2
bit2
D1C1
bit1
D1C0
bit0
MSB
LSB
DxC Brightness Control
Register Address: 0xC0
1
bit7
1
bit6
1
bit5
1
bit4
1
bit3
DxB2
bit2
DxB1
bit1
DxB0
bit0
MSB
LSB
DxB Brightness Control
Register Address: 0xB0
1
bit7
1
bit6
1
bit5
DxA4
bit4
DxA3
bit3
DxA2
bit2
DxA1
bit1
DxA0
bit0
MSB
LSB
DxA Brightness Control
Register Address: 0xA0
LM2756
www.ti.com
SNVS504C – JULY 2007 – REVISED MAY 2013
NOTE
ENA: Enables DxA LED drivers (Main Display)
ENB: Enables DxB LED drivers (Aux Lighting)
ENC: Enables D1C LED driver (Indicator Lighting)
SD53: Shuts down driver D53
SD62: Shuts down driver D62
53A: Configures D53 to GroupA
62A: Configures D62 to GroupA
Figure 23. Brightness Control Register Description
Internal Hex Address: 0xA0 (GroupA), 0xB0 (GroupB), 0xC0 (GroupC)
NOTE
DxA4-DxA0, D53, D62: Sets Brightness for DxA pins (GroupA). 11111=Fullscale
DxB2-DxB0: Sets Brightness for DxB pins (GroupB). 111=Fullscale
DxC2-DxC0: Sets Brightness for D1C pin. 111 = Fullscale
Full-Scale Current set externally by the following equation:
IDxx = 189 × 1.25V / RSET
Table 1. Brightness Level Control Table (GroupA)
Brightness Code (hex)
Perceived Brightness Level (%)
00
0.125
01
0.313
02
0.625
03
1
04
1.125
05
1.313
06
1.688
07
2.063
08
2.438
09
2.813
0A
3.125
Copyright © 2007–2013, Texas Instruments Incorporated
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