LP39542 Datasheet, PDF (25/58 Pages) National Semiconductor (TI) – Advanced Lighting Management Unit

The following figure shows the functionality of the built-in flash
30008534
Flash LED can be controlled also with external PWM signal:
Name
HC_PWM
HC_FLASH Register (10H):
Bit
Description
Flash external PWM control
5
0 = Flash external PWM control disabled
1 = Flash external PWM control enabled
High Current Driver Electrical Characteristics
Symbol
I_LEAKAGE
I_MAX(FLASH)
t_SAFETY
Parameter
FLASH pin leakage current
Maximum Sink Current
Accuracy
Current mirror ratio
Flash safety time
Condition
R_FLASH = 910Ω
EN_SAFETY = 1, FL_T = 11b
Min Typ Max Units
0.1
2
μA
400
mA
-10
-5
10
5
%
1:300
1.2
s
25
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