LM3559TLE/NOPB National Semiconductor, LM3559TLE/NOPB Datasheet - Page 27

• Manufacturer Part Number: LM3559TLE/NOPB
• Description: LM3559
• Manufacturer: National Semiconductor
• Series: -r

Specifications of LM3559TLE/NOPB

• Constant Current: Yes
• Constant Voltage: -
• Topology: High Side, PWM, Step-Up (Boost)
• Number Of Outputs: 2
• Internal Driver: Yes
• Type - Primary: Flash/Torch
• Type - Secondary: White LED
• Frequency: 1.8MHz ~ 2.2MHz
• Voltage - Supply: 2.5 V ~ 5.5 V
• Voltage - Output: -
• Mounting Type: Surface Mount
• Package / Case: 16-UFBGA
• Operating Temperature: -40°C ~ 85°C
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

FLASH DURATION REGISTER
Bits [4:0] of the Flash Duration Register set the Flash Timeout
duration. Bits [6:5] set the switch current limit. (see
N/A
(Not used)
Bit 7
Current Limit Select Bits
00 = 1.4A Peak Current Limit
01 = 2.1A Peak Current Limit
10 = 2.7A Peak Current Limit
11 = 3.2A Peak Current Limit
(default)
(CL1)
Bit 6
(CL0)
Bit 5
TABLE 5. Flash Duration Register Descriptions
Flash timeout Select Bits
00000 = 32 ms timeout
00001 = 64 ms timeout
00010 = 96 ms timeout
00011 = 128 ms timeout
00100 = 160 ms timeout
00101 = 192 ms timeout
00110 = 224 ms timeout
00111 = 256 ms timeout
01000 = 288 ms timeout
01001 = 320 ms timeout
01010 = 352 ms timeout
01011 = 384 ms timeout
01100 = 416 ms timeout
01101 = 448 ms timeout
01110 = 480 ms timeout
01111 = 512 ms timeout (default)
10000 = 544 ms timeout
10001 = 576 ms timeout
10010 = 608 ms timeout
10011 = 640 ms timeout
10100 = 672 ms timeout
10101 = 704 ms timeout
10110 = 736 ms timeout
10111 = 768 ms timeout
11000 = 800 ms timeout
11001 = 832 ms timeout
11010 = 864 ms timeout
11011 = 896 ms timeout
11100 = 928 ms timeout
11101 = 960 ms timeout
11110 = 992 ms timeout
11111 = 1024 ms timeout
Table
Bit 4
(T4)
5).
27
Bit 3
(T3)
Bit 2
(T2)
Bit 1
(T1)
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Bit 0
(T0)