CAT37 Datasheet, PDF (4/13 Pages) Catalyst Semiconductor – CMOS White LED Driver Boost Converter

CAT37
TYPICAL CHARACTERISTICS
VIN = 3.6 V,TAMB = 25˚C, CIN = 4.7 µF, COUT = 1µF, L = 6.8 µH, unless otherwise specified.
LED Current vs. Input Voltage
LED Current vs. Temperature
30
3³L^LE^ED^Ds^s
20
202m0mA A
16.0
15.5
15.0
10¹m^0mA ^A
10
4 ₄LE_LD_Es_Ds
14.5
0
2
3
4
5
6
INPUT VOLTAGE [V]
14.0
-50 -25 0 25 50 75 100
FB Pin Voltage vs. LED Current
110
105
100
3³ L^LE^EDD^ss
95
90
85
80
0
5
10
15
20
LED CURRENT [mA]
FB Pin Voltage vs. Temperature
100
95
90
85
4⁴L^LE^ED^Ds^{s a}a^tt¹1⁵5^mm^A A
V^VI^INN ⁼=^3.3⁶.^V6V
80
-50 -25
0
25
50
75 100
Switching Frequency vs. Input Voltage
1.3
1.2
1.1
1.0
0.9
4 LE⁴D^LEs^Ds
0.8 ₁
2
3
4
5
6
INPUT VOLTAGE [V]
Switching Frequency vs. Temperature
1.3
1.2
1.1
LOLAODAD=2=0 m20AmA
1.0
0.9
L_LO_OA_AD_D= ₌3 L₃E_LD_Es_DV_sIN
=_V3_I._N6V_{= 3.6V}
0.8
-50 -25 0
25 50 75 100
Doc. No. 5005, Rev. R
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