High-Efficiency, 36V Step-Up Converters
with T A Derating Option for 2 to 9 White LEDs
Typical Operating Characteristics
(Circuit of Figure 1, V IN = 3.6V, I LED = 25mA, L = 22μH, C IN = 2.2μF, C OUT = 0.1μF, C COMP = 0.1μF, R SENSE = 13 ? , 4 LEDs, T A = +25°C,
unless otherwise noted.)
100
95
EFFICIENCY
vs. INPUT VOLTAGE
90
EFFICIENCY
vs. LED CURRENT
6 LEDs
90
3 LEDs
85
85
80
75
70
65
60
4 LEDs
6 LEDs
8 LEDs
80
75
70
65
8 LEDs
3 LEDs
55
50
60
2
3
4
5
6
0
5
10
15
20
25
30
30
INPUT VOLTAGE (V)
LED CURRENT
vs. DIRECT-PWM DIMMING
26
LED CURRENT (mA)
LED CURRENT
vs. AMBIENT TEMPERATURE
24
MAX8596,
25
20
15
10
22
20
18
16
14
I LED = 25mA AT T A = +25 ° C
MAX8595,
I LED = 15mA
12
5
10
0
8
0
20
40
60
80
100
-40
-20
0
20
40
60
80
100
V IN
DUTY CYCLE (%)
SWITCHING WAVEFORMS
MAX8595X toc05
20mV/div
TEMPERATURE ( ° C)
SOFT-START AND SHUTDOWN RESPONSE
MAX8595X toc06
AC-COUPLED
V CTRL
2V/div
V LX
V OUT
I L
500ns/div
10V/div
200mV/div
AC-COUPLED
100mA/div
I IN
I LED
V OUT
20ms/div
0
100mA/div
0
40mA/div
0
10V/div
0
4
_______________________________________________________________________________________
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相关代理商/技术参数
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MAX8595YETA+T 功能描述:LED照明驱动器 36V Step-Up Converter RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
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MAX8595ZETA+T 功能描述:LED照明驱动器 36V Step-Up Converter RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
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