LM3559TLE/NOPB National Semiconductor, LM3559TLE/NOPB Datasheet - Page 32

• 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

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Bit 7
(Not
Used)
N/A
VLED MONITOR REGISTER
The VLED Monitor Register controls the internal 4-bit analog
to digital converter. Bits [3:0] of this register contain the 4-bit
data of the LED voltage. This data is the digitized voltage of
the highest of either VLED1 to GND or VLED2 to GND. Bit [4]
is the Manual Mode enable which provides for a manual con-
version of the ADC. In Manual Mode the Automatic Conver-
Bit 6
(End of
Conversion)
0 = Conversion in
progress(default)
1 = Conversion done 1 = ADC is
Bit 5
(Shutdown)
0 = ADC is
enabled
(default)
shutdown, no
conversion is
performed
TABLE 11. VLED Monitor Register Descriptions
Bit 4
(Manual Mode
Enable)
0 = Manual
Mode Disabled
(default)
1 = Manual
Mode is Enabled
32
Bit 3
(ADC3)
0000 = (VLED < 3.2V) (default)
0001 = (3.2V
0010 = (3.3V
0011 = (3.4V
0100 = (3.5V
0101 = (3.6V
0110 = (3.7V
0111 = (3.8V
1000 = (3.9V
1001 = (4.0V
1010 = (4.1V
1011 = (4.2V
1100 = (4.3V
1101 = (4.4V
1110 = (4.5V
1111 = (4.6V
sion is still performed. In automatic conversion mode a
conversion is performed each time a flash pulse is initiated.
Bit [5] is the ADC shutdown bit. Bit [6] signals the end of con-
version. This is a read-only bit that goes high when a conver-
sion is complete and data is ready. A read of the VLED
Monitor Register clears the End of Conversion bit (see ).
≤
≤
≤
≤
≤
≤
≤
≤
≤
≤
≤
≤
≤
≤
≤
Bit 2
(ADC2)
VLED < 3.3V)
VLED < 3.4V)
VLED < 3.5V)
VLED < 3.6V)
VLED < 3.7V)
VLED < 3.8V)
VLED < 3.9V)
VLED < 4.0V)
VLED < 4.1V)
VLED < 4.2V)
VLED < 4.3V)
VLED < 4.4V)
VLED < 4.5V)
VLED < 4.6V)
VLED)
Bit 1
(ADC1)
Bit 0
(ADC0)