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参数资料
| 型号： | MAX16803EVKIT+BJT |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/11页 |
| 文件大小： | 0K |
| 描述： | EVAL KIT FOR MAX16803 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 电流 - 输出 / 通道： | 1A |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 38V |
| 特点： | 可调光，5V 额外输出 |
| 输入电压： | 6.5 ~ 40 V |
| 已供物品： | 板 |
| 已用 IC / 零件： | MAX16803 |
High-Voltage, 350mA, High-Brightness LED
Driver with PWM Dimming and 5V Regulator
Two Brightness Levels for
TAIL/STOP Lights
Figure 4 shows PWM dimming operation for the
MAX16803 with an ICM7555 timer. The ICM7555 pro-
vides adjustable duty cycle using two external resistors
and a capacitor. In TAIL operation, the output of the
ICM7555 feeds into DIM and lights up the LEDs. The
LED ’s brightness depends on the duty cycle of the
ICM7555. When V STOP is present, DIM is pulled up to
V STOP . The PWM dimming operation is disabled and
the LEDs light up to full brightness. See the ICM7555
data sheet for formulas to calculate the dimming fre-
quency and the duty cycle.
D1
STOP
D2
LED Current Thermal Foldback
With a minimum number of external components, the
MAX16803 provides LED current thermal foldback
using a negative temperature coefficient (NTC) thermis-
tor. Figure 5 shows a thermistor connected to V5 and
the CS+ of the MAX16803. As the temperature increas-
es, the voltage drop across R2 increases causing the
LED current to decrease.
I LED = [V SENSE - [R2 / (R2 + RT)] x V5] / R1
TAIL
R1
IN
OUT
R2
D3
C1
EN
MAX16803
V5
+5V REG
C2
LEDs
IN
D4
DIS
OUT
DIM
CS+
R3
TH
TRG
ICM7555
GND
GND
CS-
R SENSE
C3
Figure 4. PWM Dimming Operation with ICM7555 Timer
V IN
IN
OUT
PWM DIMMING
EN
MAX16803
V5
C2
RT
LEDs
C1
DIM
GND
Figure 5. LED Current Thermal Foldback with an NTC Thermistor
CS+
CS-
R2
R1
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16804ATP+ | 功能描述:LED照明驱动器 350mA HB LED Drvr w/analog & PWM Dim 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 |
| MAX16804ATP+T | 功能描述:LED照明驱动器 350mA HB LED Drvr w/analog & PWM Dim 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 |
| MAX16805ATP+ | 功能描述:LED照明驱动器 EEPROM-Prog 350mA w/Current Foldback 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 |
| MAX16805ATP+T | 功能描述:LED照明驱动器 EEPROM-Prog 350mA w/Current Foldback 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 |
| MAX16806ATP+ | 功能描述:LED照明驱动器 EEPROM-Prog 350mA w/Current Foldback 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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