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High-Voltage, 350mA, High-Brightness LED
Driver with PWM Dimming and 5V Regulator
Input-Voltage Considerations
For proper operation, the minimum input voltage must
always be:
V IN(MIN) ≥ V SENSE(MAX) + V FT(MAX) + ? V DO(MAX)
where V FT(MAX) is the total forward voltage of all series
connected LEDs. The minimum operating voltage of the
device is +6.5V. The device operates below +6.5V; how-
ever, output current may not meet the full regulation
Paralleling Multiple MAX16836s
to Drive One High-Power LED
For applications that require more than 350mA of LED
current, two or more MAX16836s can be paralleled
(see Figure 3). V CS - should not exceed 4.1V.
specification.
Low-Frequency PWM Dimming at the Output
IN
OUT
R1
The MAX16836 provides pulsed or chopped current
dimming input (DIM). The other method is to connect
DIM to V5 and EN to IN and pulse EN. Both methods
generate a regulated-amplitude PWM current (variable
duty cycle) that can provide control over the LED
brightness (see Figures 1 and 2).
V DIM
C1
V5
EN
DIM
GND
MAX16836
V5
CS+
CS-
C2
16
OUT
15
EN
14
N.C.
13
DIM
1
OUT
GND 12
I LED
V IN
2
IN
V5 11
D1
C1
3
IN
MAX16836
CS- 10
C2
R SENSE
V IN
R2
4
N.C.
N.C.
N.C.
N.C.
N.C.
CS+ 9
IN
OUT
5
6
7
8
EN
V5
Figure 1. Dimming with EN Connected to V IN at a Constant
C3
MAX16836
C4
Voltage and DIM Pulsed
V5
DIM
CS+
CS-
LEDs
1
OUT
16
OUT
15
EN
14
N.C.
13
DIM
GND 12
I LED
GND
V IN
2
IN
V5 11
D1
C1
3
IN
MAX16836
CS- 10
C2
R SENSE
Figure 3. Paralleling MAX16836s
4
N.C.
CS+ 9
N.C.
5
N.C.
6
N.C.
7
N.C.
8
Figure 2. Dimming with DIM Connected to V5, EN Connected
to V IN
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相关代理商/技术参数
MAX16838ATP/V+ 功能描述:LED照明驱动器 Integrated 2-Channel High-Brightness LED Drivers with High-Voltage DC-DC Controller 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
MAX16838ATP/V+T 功能描述:LED照明驱动器 Integrated 2-Channel High-Brightness LED Drivers with High-Voltage DC-DC Controller 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
MAX16838ATP+ 功能描述:LED照明驱动器 HB w/High-Voltage DC/DC Controller 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
MAX16838ATP+T 功能描述:LED照明驱动器 HB w/High-Voltage DC/DC Controller 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
MAX16838ATT+ 制造商:Maxim Integrated Products 功能描述:- Rail/Tube
MAX16838AUP/V+ 功能描述:LED照明驱动器 HB w/High-Voltage DC/DC Controller 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
MAX16838AUP/V+T 功能描述:LED照明驱动器 HB w/High-Voltage DC/DC Controller 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
MAX16838AUP+ 功能描述:LED照明驱动器 HB w/High-Voltage DC/DC Controller 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