LP3943ISQ/NOPB National Semiconductor, LP3943ISQ/NOPB Datasheet - Page 7

• Manufacturer Part Number: LP3943ISQ/NOPB
• Description: IC LED DRIVER RGB 24-LLP
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: RGB LED Driverr

Specifications of LP3943ISQ/NOPB

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 16
• Internal Driver: Yes
• Type - Primary: LED Blinker, Light Management Unit (LMU)
• Type - Secondary: RGB, White LED
• Frequency: 400kHz
• Voltage - Supply: 2.3 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 24-LLP
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 25mA
• Internal Switch(s): Yes
• For Use With: LP3943ISQEV - BOARD EVAL FOR LP3943 FUNLIGHT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Efficiency: -
• Other names: LP3943ISQ; LP3943ISQTR

Application Notes
(Continued)
20079608
FIGURE 3. Chip Address Byte
20079609
w = write (SDA = “0”)
r = read (SDA = “1”)
ack = acknowledge (SDA pulled LOW by either master or slave)
rs = repeated start
xx = 60 to 67
FIGURE 4. LP3943 Register Write
However, if a READ function is to be accomplished, a
WRITE function must precede the READ function, as shown
in Figure 5.
20079610
w = write (SDA = “0”)
r = read (SDA = “1”)
ack = acknowledge (SDA pulled LOW by either master or slave)
rs = repeated start
xx = 60 to 67
FIGURE 5. LP3943 Register Read
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