LM3559TLX/NOPB National Semiconductor, LM3559TLX/NOPB Datasheet - Page 25

• Manufacturer Part Number: LM3559TLX/NOPB
• Description: LM3559
• Manufacturer: National Semiconductor
• Series: -r

Specifications of LM3559TLX/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

Register Descriptions
ENABLE REGISTER
Bits [1:0] of the Enable Register controls the on/off state of
Torch mode, Flash mode, and Privacy Indicate mode. Bits
[4:3] turn on/off the main current sources (LED1 and LED2).
Note: Bit 7 Enables/Disables the Message Indicator Blinking Function. With this bit set to 0 and Bit 6 set to 1, the Message Indicator turns on constantly at the
programmed current as set in the Indicator Register, bits [2:0].
Bit 7
(EN Blink)
0 = Message
Indicator
Blinking
Function is
disabled (See
Note below).
(default)
1 = Message
Indicator
Blinking
Function is
enabled. The
message
indicator
blinks the
pattern
programmed
in the
Indicator
Register and
Indicator
Blinking
Register
Enable
Privacy
Indicator
Indicator Blinking
Privacy PWM
GPIO
VLED Monitor (ADC)
ADC Delay
VIN Monitor
Last Flash
Torch Brightness
Flash Brightness
Flash Duration
Flags
Configuration 1
Configuration 2
Register Name
Bit 6
(EN
Message
Indicator)
0 = Message
Indicator is
disabled
(default)
1= Message
Indicator is
enabled.
Bit 5
(STROBE
Level/Edge)
0 = (Level Sensitive)
When STROBE goes
high, the flash current
will turn on and remain
on for the duration the
STROBE pin is held
high or until the Flash
Timeout occurs,
whichever comes first.
(default)
1 = (Edge Triggered)
When STROBE goes
high , the flash current
will turn on and remain
on for the duration of
the Flash timeout.
TABLE 2. Enable Register Descriptions
TABLE 1. LM3559 Internal Registers
Internal Hex Address
Bit 4
(LED2
Enable)
0 = LED2 off
1 = LED2 on
(default)
0xA0
0xB0
0xC0
0xD0
0xE0
0x10
0x11
0x12
0x13
0x14
0x20
0x30
0x31
0x80
0x81
0xF0
25
Bit [5] sets the level or edge control for the STROBE input.
Bits 7 and 6 control the Indicator current source (see
2).
Bit 3
(LED1
Enable)
0 = LED1 off
1 = LED1 on
(default)
Bit 2
(Not Used)
N/A
Power On/RESET Value
Bit 1
(EN1)
Enable Bits
00 = Current Sources are
Shutdown (default)
01 = Privacy Indicator Mode
10 = Torch Mode
11 = Flash Mode (bits reset
at timeout)
0xDD
0xF0
0xC0
0xC0
0x6F
0xF0
0x18
0x58
0x00
0x00
0x80
0x80
0x00
0x52
0x00
0x68
Bit 0
(EN0)
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