LP55281TLX/NOPB National Semiconductor, LP55281TLX/NOPB Datasheet - Page 18

• Manufacturer Part Number: LP55281TLX/NOPB
• Description: IC LED DRIVER RGB 36-USMD
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: RGB LED Driverr

Specifications of LP55281TLX/NOPB

• Constant Current: Yes
• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 12
• Internal Driver: Yes
• Type - Primary: Light Management Unit (LMU)
• Type - Secondary: Color, RGB
• Frequency: 1MHz ~ 2MHz
• Voltage - Supply: 3 V ~ 5.5 V
• Voltage - Output: 4 V ~ 5.3 V
• Mounting Type: Surface Mount
• Package / Case: 36-MicroSMD
• Operating Temperature: -30°C ~ 85°C
• Current - Output / Channel: 300mA
• Internal Switch(s): Yes
• Efficiency: 88%
• For Use With: LP55281RLEV - BOARD EVAL FOR LP5528 RGB DRIVER
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LP55281TLX

7V Shielding
To shield LP55281 from high input voltages (6 to 7.2V), the use of external 2.8V LDO is required. This 2.8V voltage protects
internally the device against high voltage condition. The recommended connection is shown in the picture below. Internally both
logic and analog circuitry works at 2.8V supply voltage. Both supply voltage pins should have separate filtering capacitors. Note
that it is recommended to pull down the external LDO voltage when it is disabled in order to minimize the leakage current of the
LED outputs.
20201121
In cases where high voltage is not an issue, the alternative connection is shown below.
20201122
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