ISL78171 Datasheet, PDF (10/29 Pages) Intersil Corporation – 6-Channel, 50mA Automotive LED Driver with Ultra-high Dimming Ratio and Phase Shift Control

ISL78171
Typical Performance Curves LED configuration: 6P10S (Continued)
0.60
0.55
+25°C
-40°C
V_OUT = 50mV/DIV
2.00µs/DIV
0.50
0°C
0.45
V_LX = 20V/DIV
2.00µs/DIV
0.40
0
5
10
15
20
25
30
V_IN (V)
FIGURE 14. V_HEADROOM vs V_IN vs TEMPERATURE AT 20mA
FIGURE 15. V_OUT RIPPLE VOLTAGE, V_IN = 12V, 6P12S AT
20mA/CHANNEL
V^V_^_O^UU^TT
V^V_^_EE^NN
V^V_^_L^LXX
I_I_INNDDUUCTCOTROR
FIGURE 16. SOFT-START INDUCTOR CURRENT AT V_IN = 6V FOR
6P12S AT 20mA/CHANNEL
V^V_^OO^UU^TT
V^V__^EE^NN
V^V_^_LL^XX
I_I_IINNDDUUCTCOTROR
FIGURE 17. SOFT-START INDUCTOR CURRENT AT V_IN = 12V FOR
6P12S AT 20mA/CHANNEL
6P12S, 20mA/CH
10ms/DIV
V_IN = 10V/DIV
ILED = 20mA/DIV
I_V_IN = 1A/DIV
6P12S, 20mA/CH
V_IN = 10V/DIV
10.0ms/DIV
I_V_IN = 1A/DIV
ILED = 20mA/DIV
EN
FIGURE 18. LINE REGULATION WITH V_IN CHANGE FROM 6V TO 26V,
6P12S AT 20mA/CHANNEL
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FIGURE 19. LINE REGULATION WITH V_IN CHANGE FROM 26V TO 6V
FOR 6P12S AT 20mA/CHANNEL
FN8602.0
June 15, 2015