LP5526TLX/NOPB National Semiconductor, LP5526TLX/NOPB Datasheet - Page 18

• Manufacturer Part Number: LP5526TLX/NOPB
• Description: IC LED DRVR WT/RGB BCKLT 25-USMD
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: Backlight, White LED, RGB (I²C Interface)r

Specifications of LP5526TLX/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: RGB, White LED
• Frequency: 1MHz
• Voltage - Supply: 3 V ~ 5.5 V
• Voltage - Output: 8 V ~ 20 V
• Mounting Type: Surface Mount
• Package / Case: 25-MicroSMD
• Operating Temperature: -30°C ~ 85°C
• Current - Output / Channel: 150mA
• Internal Switch(s): Yes
• Efficiency: 88%
• For Use With: LP5526TLEV - BOARD EVAL LP5526 LMU LED DRIVER
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LP5526TLX

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Backlight Drivers
LP5526 has 2 independent backlight drivers. Both drivers are
regulated constant current sinks. LED current for both LED
EXTERNAL PWM CONTROL
The GPIO[0]/PWM pin can be used to control the backlight
drivers brightness or set leds on/off. External PWM control is
enabled
by
MAIN output for 4 LEDs (DISPL = 0)
writing
1
to
EN_MAIN_PWM
MAIN and SUB outputs for 8 LEDs (DISPL = 1)
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and/or
18
strings are controlled by the 8-bit current mode DACs with 0.1
mA step. MAIN and SUB LEDs can be also controlled with
one DAC (MAIN) for better matching allowing the use of larger
displays having up to 8 white LEDs by setting DISPL bit to 1.
EN_SUB_PWM bits in register address 2BH. GPIO[0]/PWM
pin is used as external PWM input when EN_PWM_PIN is set
high. PWM input is active high, i.e. LED is activated when in
high state.
SUB output for 2 LEDs (DISPL = 0)
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