LP3943ISQEV/NOPB National Semiconductor, LP3943ISQEV/NOPB Datasheet - Page 7

• Manufacturer Part Number: LP3943ISQEV/NOPB
• Description: BOARD EVAL FOR LP3943 FUNLIGHT
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LP3943ISQEV/NOPB

• Current - Output / Channel: 25mA
• Outputs And Type: 16, Non-Isolated
• Voltage - Output: 4 V
• Features: Dimmable
• Voltage - Input: 2.3 ~ 5.5 V
• Utilized Ic / Part: LP3943
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LP3943ISQEV; *LP3943ISQEV/NOPB; LP3943ISQEV

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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