+85°C

-40°C

+25°C

LP5526

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SNVS431D – FEBRUARY 2006 – REVISED MARCH 2013

RGB LEDs Driver Performance Characteristics

Parameter

Test Conditions

Min

Typ

Max

Unit

RLED, GLED, BLED pin leakage

1

µA

current

Maximum recommended sink

CC mode

50

mA

SW mode

60

mA

Accuracy at 50mA

CC mode

5

12.5

%

Current mirror ratio

CC mode

1:100

RGB current matching error

2

%

Switch resistance

SW mode

3.2

Ω

RGB internal PWM switching

Accuracy same as internal clock

20

kHz

frequency

frequency accuracy

Saturation voltage (current drop

230

350

mV

10%)

-30ºC

300

+85ºC

430

(1)

RGB current should be limited as follows:

switch mode – limited by external ballast resistors

Output Current

Output Current

vs

vs

Pin Voltage (CC Mode)

Figure 21.

Figure 22.

Backlight Drivers

LP5526 has 2 independent backlight drivers. Both drivers are regulated constant current sinks. LED current for

both LED 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.

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