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LM3550SPX/NOPB Datasheet(PDF) 25 Page - Texas Instruments

Part # LM3550SPX/NOPB
Description  LM3550 5-A Super-Capacitor Flash LED Driver
PDF  43 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

LM3550SPX/NOPB Datasheet(HTML) 25 Page - Texas Instruments

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IND EN
bit7
A/T EN
bit6
FGATE
bit5
CM1
bit4
CM0
bit3
FLASH
bit2
CHARGE
bit1
TORCH
bit0
MSB
LSB
General Purpose Register
Register Address: 0x10
25
LM3550
www.ti.com
SNVS569C – MAY 2009 – REVISED OCTOBER 2016
Product Folder Links: LM3550
Submit Documentation Feedback
Copyright © 2009–2016, Texas Instruments Incorporated
7.6 Register Maps
7.6.1 Internal Registers
Register
Internal Hex Address
Power On Value
General Purpose
0x10
0000 0000
Current Control
0xA0
1111 1000
Options
0xB0
1000 0000
ALD/TEMP Sense High
0xC0
1111 1001
ALD/TEMP Sense Low
0xD0
1100 0110
7.6.1.1 General Purpose Register Description
FLASH, CHARGE, and TORCH: Mode Bits (see Table 2).
CM0–CM1: Capacitor Charge Mode (see Table 3).
FGATE: Flash Gate Bit. If FGATE is a 0, then an end-of-charge condition must occur before a flash can take
place. If FGATE is a 1, then an end-of-charge condition does not have to occur before a flash can take place.
A/T EN: ALD/TEMP Enable Bit
IND EN: Enable Indicator Current Source (0 = Indicator Off, 1 = Indicator On)
Table 2. Control Modes
Flash
Charge
Torch
Mode
0
0
0
Disabled
0
0
1
Torch
0
1
0
Charge
0
1
1
Charge and Torch
1
x
x
Flash
Table 3. Capacitor Charge Level
CM1
CM0
Level
0
0
Optimal Charge Mode
0
1
4.5
1
0
5.0V
1
1
5.3V
Table 4. Gated Flash Control
FGATE Bit
Result
0
Flash only allowed after EOC reached
1
Flash allowed without EOC reached
Table 5. ALD/TEMP Control
A/T EN Bit
Result
0
ALD MODE DISABLED
1
ALD MODE ENABLED



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