LP3950SL/NOPB National Semiconductor, LP3950SL/NOPB Datasheet - Page 26

• Manufacturer Part Number: LP3950SL/NOPB
• Description: IC LED DRVR WHITE BCKLGT 32-TSCP
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: Backlight, White LED (I²C Interface)r

Specifications of LP3950SL/NOPB

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 6
• Internal Driver: Yes
• Type - Primary: Flash/Torch, LED Blinker, Light Management Unit (LMU)
• Type - Secondary: RGB, White LED
• Frequency: 2MHz
• Voltage - Supply: 2.7 V ~ 2.9 V
• Voltage - Output: 5V
• Mounting Type: Surface Mount
• Package / Case: 32-Laminate TCSP
• Operating Temperature: -40°C ~ 85°C
• Internal Switch(s): Yes
• Efficiency: 90%
• Led Driver Application: Mobile Phone Display Lighting, General LED Lighting
• No. Of Outputs: 6
• Output Current: 300mA
• Output Voltage: 5.3V
• Input Voltage: 3V To 7.2V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output / Channel: -
• Other names: LP3950SL/CSP1; LP3950SLTR

PCB Design Guidelines
(Continued)
capacitor, the inductor, the SW pin, the GND_BOOST pin
and the ground plane, as shown by the dashed line in Figure
21. The other switching loop, the rectifier loop, is formed by
the input capacitor, the inductor, the diode, the output ca-
pacitor and the ground plane, as shown by the dotted line.
Arrange the components so that the switching current loops
curl in the same direction (see arrows in Figure 21). See also
Application Note AN 1149, Layout Guidelines for Switching
Mode Power Supplies.
20129342
FIGURE 21. The Current Loops
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