LP3958TL/NOPB National Semiconductor, LP3958TL/NOPB Datasheet - Page 20

• Manufacturer Part Number: LP3958TL/NOPB
• Description: IC LED DRVR WT/CLR BCKLT 25-USMD
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: Backlight, White LED, Color LEDr

Specifications of LP3958TL/NOPB

• Constant Current: Yes
• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 5
• Internal Driver: Yes
• Type - Primary: Backlight, Light Management Unit (LMU)
• Type - Secondary: White LED
• Frequency: 1MHz
• Voltage - Supply: 3 V ~ 5.5 V
• Voltage - Output: 18V
• Mounting Type: Surface Mount
• Package / Case: 25-MicroSMD
• Operating Temperature: -30°C ~ 85°C
• Internal Switch(s): Yes
• Efficiency: 90%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output / Channel: -
• Other names: LP3958TLTR

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I
w = write (SDA = “0”)
r = read (SDA = “1”)
ack = acknowledge (SDA pulled down by either master or slave)
rs = repeated start
id = 7-bit chip address, 59H (101 1001b) for LP3958.
2
When a READ function is to be accomplished, a WRITE function must precede the READ function, as shown in the Read
Cycle waveform.
C Compatible Interface
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I
2
2
C Write Cycle
C Read Cycle
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