ISL97671A データシートの表示（PDF） - Intersil
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ISL97671A Datasheet PDF : 28 Pages
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ISL97671A
Typical Performance Curves (Continued)
6P12S, 20mA/CH
VIN = 10V/DIV
10.0ms/DIV
I_VIN = 1A/DIV
ILED = 20mA/DIV
EN
FIGURE 15. LINE REGULATION WITH VIN CHANGE FROM 26V TO 6V
FOR 6P12S AT 20mA/CHANNEL
6P12S, 20mA/CH
VO = 1V/DIV
10.0ms/DIV
ILED = 20mA/DIV
FIGURE 16. LOAD REGULATION WITH ILED CHANGE FROM 0% TO
100% PWM DIMMING, VIN = 12V, 6P12S AT
20mA/CHANNEL
6P12S, 20mA/CH
VO = 1V/DIV
10.0ms/DIV
ILED = 20mA/DIV
6P12S, 20mA/CH
VO = 10V/DIV
20.0ms/DIV
ILED = 20mA/DIV
EN
I_VIN = 1A/DIV
FIGURE 17. LOAD REGULATION WITH ILED CHANGE FROM 100%
TO 0% PWM DIMMING, VIN = 12V, 6P12S
AT 20mA/CHANNEL
FIGURE 18. ISL97672A SHUTS DOWN AND STOPS SWITCHING
~30ms AFTER EN GOES LOW
0.0030
0.0025
0.0020
0.0015
ILED = 20mA
FPWM = 200Hz
0.0010
NO CH CAPS
0.006 0.007 0.008 0.009 0.010 0.011 0.012 0.013 0.014
PWM DIMMING DUTY CYCLE (%)
FIGURE 19. DIRECT PWM DIMMING MINIMUM DIMMING LINEARITY
10
FN7709.1
March 24, 2011
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