MAXREFDES1275
Reference Guide
描述
The MAXREFDES1275 has three main blocks: the microcontroller, ADC/DAC IC MAX11311, and three LED drivers. The brightness of each LED string can be set by applying an industry standard 0V to 10V dimming signal. The LED brightness should scale linearly to this signal. A conversion is required as the range and offset of the analog DIM input on the LED driver is different from this 0V to 10V signal. The microcontroller manages this by sampling the 0V to 10V DIM signals with the ADCs, calculating the new values, and forwarding them as analog voltages to the LED drivers with the DACs. A PC can be connected for a calibration procedure as the offset and maximum current can vary between the channels. The new constants are stored in the flash memory after calibration.
特征
- Active low-fault (FLT) indicator
- Output short-circuit protection
- High-side current regulation eliminates one connection to the LED string
- 5V, 10mA LDO output provides bias to other circuits
- Ultra-low shutdown current (5μA typ)
示意图
PCB布局
物料清单(BOM)
参数化
| 输入类型 | Vin(Min) | Vin(Max) | Iout(Max) | 单路/多路输出 | Vout(V) | Pout(W) | 隔离/非隔离 | 拓扑 |
|---|---|---|---|---|---|---|---|---|
| DC | 36 | 54 | 1 | Multiple Output | - | - | - | Buck |
参数化
| 输入类型 | DC |
| Vin(Min) | 36 |
| Vin(Max) | 54 |
| Iout(Max) | 1 |
| 单路/多路输出 | Multiple Output |
| Vout(V) | - |
| Pout(W) | - |
| 隔离/非隔离 | - |
| 拓扑 | Buck |
Maxim设备 (1)
器件号
|
名称
|
产品线
|
购买
|
设计套件和评估模块 |
|---|---|---|---|---|
| MAX17632 | 4.5V至36V、2A、高效、同步降压型DC-DC转换器 | 开关稳压器 | 立即购买 | Design Kits |
设计资料 (3)
| 标题
|
类型
|
尺寸
|
日期
|
|---|---|---|---|
 MAXREFDES1275 BOM |
CSV | 4KB | 2021-11-21 |
| MAXREFDES1275 Schematic |
33KB | 2021-11-21 | |
| MAXREFDES1275 PCB |
957KB | 2021-11-21 |
| 日期
|
类型
|
|---|---|
| 2021-11-21 |
(CSV, 4KB) |
| 2021-11-21 |
(PDF, 33KB) |
| 2021-11-21 |
(PDF, 957KB) |
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