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参数资料
| 型号： | MAX16815ASA+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 8/11页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER 100MA 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 拓扑： | 线性（LDO），PWM |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 车载，背光 |
| 类型 - 次要： | 高亮度 LED（HBLED） |
| 电源电压： | 6.5 V ~ 40 V |
| 输出电压： | 5V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm Width）裸露焊盘 |
| 供应商设备封装： | 8-SOICN 裸露焊盘 |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 125°C |
High-Voltage, 100mA/200mA Adjustable Linear
High-Brightness LED Drivers with PWM Dimming
D1
STOP
D2
TAIL
R1
IN
MAX16815
OUT
R2
D3
C1
MAX16828
V5
+5V REG
C2
LEDs
DIS
IN
D4
R3
C2
TH
TRG
ICM7555
OUT
GND
R4*
DIM
GND
CS+
CS-
R SENSE
*R4 < 300k ?
Figure 1. PWM Dimming Operation with ICM7555 Timer
Two Brightness Levels for
TAIL/STOP Lights
Figure 1 shows PWM dimming operation for the
MAX16815/MAX16828 with an ICM7555 timer. The
V IN
IN
OUT
ICM7555 provides 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
C1
PWM
DIMMING
MAX16815
MAX16828
V5
C2
RT
LEDs
cycle of the ICM7555. When V STOP is present, DIM is
pulled up to V STOP . The PWM dimming operation is dis-
abled and the LEDs light up to full brightness. See the
ICM7555 data sheet for formulas to calculate the dim-
ming frequency and the duty cycle.
LED Current Thermal Foldback
With a minimum number of external components, the
DIM
GND
CS+
CS-
R2
R1
MAX16815/MAX16828 provide LED current thermal
foldback using a negative temperature coefficient
(NTC) thermistor. Figure 2 shows a thermistor connect-
ed to V5 and the CS+ of the MAX16815/MAX16828. As
the temperature increases, the voltage drop across R2
increases, causing the LED current to decrease.
I LED = [V RSNS - (R2 / R T ) (V V5 - V RSNS )]/R1
Other Applications
The application circuit in Figure 3 implements a two-
level brightness current for TAIL/STOP lights. In TAIL
operation, Q1 is off and R1 sets the output current. In
Figure 2. LED Current Thermal Foldback with an NTC
Thermistor
STOP operation, Q1 turns on and the output current is
set by a parallel combination of R1 and R2. Figure 4
shows an application circuit with the MAX16815/
MAX16828 using a single BJT to provide high output
current. For proper operation:
V IN(MIN) > V CESAT(MAX) + V FT(MAX) + V RSNS
where V CESAT(MAX) is the maximum saturation voltage
of the external BJT and V FT(MAX) is the total forward
voltage of all series connected LEDs.
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16815ASA+ | 功能描述:LED照明驱动器 High-Voltage 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 |
| MAX16815ASA+T | 功能描述:LED照明驱动器 High-Voltage 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 |
| MAX16815ATT/V+T | 制造商:Maxim Integrated Products 功能描述:HIGH-VOLTAGE, 100MA/200MA ADJUSTABLE LINEAR HIGH-BRIGHTNESS - Tape and Reel |
| MAX16815ATT+T | 功能描述:LED照明驱动器 High-Voltage 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 |
| MAX16816ATJ+ | 功能描述:LED照明驱动器 Prog Switch-Mode w/Alog-Ctrld 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 |
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