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LM3554 Fiches technique(PDF) 31 Page - Texas Instruments

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No de pièce LM3554
Description  Synchronous Boost Converter with 1.2A Dual High Side LED Drivers and I2C Compatible
PDF  43 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

LM3554 Fiches technique(HTML) 31 Page - Texas Instruments

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Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 7
MSB
LSB
Flags Register
Register Address 0xD0
VIN Monitor
Fault
LED Thermal
Fault
TX2
Interrupt
LED
Fault
Thermal
Shutdown
Flash
Timeout
TX1
Interrupt
N/A
Bit 6
LM3554
www.ti.com
SNVS549A – JUNE 2009 – REVISED APRIL 2011
Table 4. Flash Duration Register Bit Settings
Bit 7 (Not
Bit 6 (CL1)
Bit 5 (CL0)
Bit 4 (T4)
Bit 3 (T3)
Bit 2 (T2)
Bit 1 (T1)
Bit 0 (T0)
used)
Reads Back '0'
Current
Limit
Select
Bits Flash
Timeout
Select
Bits
00 = 1A Peak Current Limit 00000
=
32ms
timeout
01 = 1.5A Peak Current Limit 00001
=
64ms
timeout
t10
=
2A
Peak
Current 00010
=
96ms
timeout
Limi(default)
00011
=
128ms
timeout
11 = 2.5A Peak Current Limit
00100
=
160ms
timeout
00101
=
192ms
timeout
00110
=
224ms
timeout
00111
=
256ms
timeout
01000
=
288ms
timeout
01001
=
320ms
timeout
01010
=
352ms
timeout
01011
=
384ms
timeout
01100
=
416ms
timeout
01101
=
448ms
timeout
01110
=
480ms
timeout
01111
=
512ms
timeout
(default)
10000
=
544ms
timeout
10001
=
576ms
timeout
10010
=
608ms
timeout
10011
=
640ms
timeout
10100
=
672ms
timeout
10101
=
704ms
timeout
10110
=
736ms
timeout
10111
=
768ms
time-out
11000
=
800ms
timeout
11001
=
832ms
timeout
11010
=
864ms
timeout
11011
=
896ms
timeout
11100
=
928ms
timeout
11101
=
960ms
timeout
11110
=
992ms
timeout
11111 = 1024ms timeout
FLAGS REGISTER
The Flags Register holds the status of the flag bits indicating LED Failure, Over-Temperature, the Flash Timeout
expiring, VIN Monitor Fault, LED over temperature (NTC), and a TX interrupt. (See Figure 21 and Table 4.)
Figure 22. Flags Register Description
Copyright © 2009–2011, Texas Instruments Incorporated
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