LM3559TLE/NOPB National Semiconductor, LM3559TLE/NOPB Datasheet - Page 34

• 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

www.national.com
PRIVACY PWM PERIOD REGISTER
The Privacy PWM Register contains the bits to control the
PWM period for the privacy indicate mode (see
INDICATOR REGISTER
The Message Indicator Register contain the bits which control
the following:
1.
Bits 7-3
(Not Used)
(t
00 = 78 ms (default)
01 = 156 ms
10 = 312 ms
11 = 624 ms
RAMP
Bit 7 (R2)
Indicator current level
)
Bit 6 (R1)
(PERIOD#)
000 = 0 (default)
001 = 1
010 = 2
011 = 3
100 = 4
101 = 5
110 = 6
111 = 7
Bit 5 (P3)
TABLE 15. Privacy PWM Period Register
Table
TABLE 16. Indicator Register
Bit 4 (P2)
15).
34
Bit 3 (P1)
2.
3.
Pulse width
Ramp times for turn-on and turn-off of the indicator
current source (see
timing diagram).
(I
000 = 2.25 mA (default)
001 = 4.5 mA
010 = 6.75 mA
011 = 9 mA
100 = 11.25 mA
101 = 13.5 mA
110 = 15.75 mA
111 = 18 mA
IND
Bit 2
(P3)
000 = 5.12 ms
001 = 2.56 ms
010 = 1.28 ms
011 = 640 µs
1XX = 320 µs
Bit 2 (I3)
)
Figure 18
Bit 1
(P2)
Bit 1 (I2)
for the message indicator
Bit 0
(P1)
Bit 0 (I1)