LP5521TMEV National Semiconductor, LP5521TMEV Datasheet - Page 18

• Manufacturer Part Number: LP5521TMEV
• Description: EVAL BOARD FOR LP5521
• Manufacturer: National Semiconductor

Specifications of LP5521TMEV

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: Q5109809

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DIRECT Control
When R, G or B channel mode is set to 00b, the LP5521
drivers work in direct control mode. LP5521 LED channels
can be controlled independently through I
nel there is a PWM control register and a output current
If charge pump automatic gain change is used in this mode,
then PWM values need to be written 0 before changing the
Name
PWM
R_PWM register (02H), G_PWM register (03H), B_PWM register (04H):
Bit
7:0
2
C. For each chan-
Description
LED PWM value during direct control operation mode
0000 0000b = 0%
1111 1111b = 100%
18
control register. With output current control register is set what
is the maximum output current with 8-bit resolution, step size
is 100 μA. Duty cycle can be set with 8-bit resolution. Direct
control mode resets respective channel’s PC. PWM control
bits are presented in following table:
drivers’ operation mode to disabled (00b) to ensure proper
automatic gain change operation.