MAX8596X Maxim Integrated Products, MAX8596X Datasheet - Page 4

• Manufacturer Part Number: MAX8596X
• Description: High-Efficiency 36V Step-Up Converters
• Manufacturer: Maxim Integrated Products

High-Efficiency, 36V Step-Up Converters
with T
(Circuit of Figure 1, V
unless otherwise noted.)
4
_______________________________________________________________________________________
V
100
V
OUT
V
95
90
85
80
75
70
65
60
55
50
30
25
20
15
10
LX
5
0
IN
I
L
A
2
0
3 LEDs
IN
Derating Option for 2 to 9 White LEDs
vs. DIRECT-PWM DIMMING
= 3.6V, I
20
SWITCHING WAVEFORMS
3
vs. INPUT VOLTAGE
6 LEDs
INPUT VOLTAGE (V)
LED CURRENT
DUTY CYCLE (%)
4 LEDs
EFFICIENCY
8 LEDs
40
500ns/div
LED
4
= 25mA, L = 22µH, C
60
5
80
MAX8595X toc05
100
6
20mV/div
AC-COUPLED
10V/div
200mV/div
AC-COUPLED
100mA/div
IN
= 2.2µF, C
OUT
Typical Operating Characteristics
= 0.1µF, C
V
V
CTRL
I
OUT
LED
90
85
80
75
70
65
60
26
24
22
20
18
16
14
12
10
I
8
IN
-40
SOFT-START AND SHUTDOWN RESPONSE
0
MAX8596,
I
COMP
LED
-20
= 25mA AT T
vs. AMBIENT TEMPERATURE
5
MAX8595,
I
LED
6 LEDs
= 0.1µF, R
= 15mA
0
vs. LED CURRENT
LED CURRENT (mA)
TEMPERATURE (°C)
10
LED CURRENT
EFFICIENCY
A
20ms/div
20
= +25°C
15
8 LEDs
SENSE
40
20
3 LEDs
60
= 13Ω, 4 LEDs, T
MAX8595X toc06
25
80
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100
30
0
0
0
0
2V/div
100mA/div
40mA/div
10V/div
A
= +25°C,