LP55281TL/NOPB National Semiconductor, LP55281TL/NOPB Datasheet - Page 10

• Manufacturer Part Number: LP55281TL/NOPB
• Description: IC LED DRIVER RGB 36-USMD
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: RGB LED Driverr

Specifications of LP55281TL/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: LP55281TLTR

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BOOST STANDBY MODE
User can stop the Boost Converter operation by writing the
Enables register bit EN_BOOST low. When EN_BOOST is
written high, the converter starts for 10 ms in PFM mode and
then goes to PWM mode.
BOOST OUTPUT VOLTAGE CONTROL
User can control the Boost output voltage by boost output 8-
bit register.
BOOST FREQUENCY CONTROL
Register 'Frequency selections' (address 10h). Register de-
fault value after reset is 07h.
Boost Output [7:0] Register 0Fh
0000 0000
0000 0001
0000 0011
0000 0111
0000 1111
0001 1111
0011 1111
0111 1111
1111 1111
Bin
Hex
FF
00
01
03
07
0F
1F
3F
7F
Voltage (typical)
Boost Output
5.00 (default)
4.00
4.25
4.40
4.55
4.70
4.85
5.15
5.30
10
FRQ_SEL[2:0]
1XX
01X
001
Boost Output Voltage Control
frequency
2.00 MHz
1.67 MHz
1.00 MHz
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