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参数资料
| 型号： | MAX16835ATE+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 6/8页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVR HIGH BRIGHT 16-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 拓扑： | 线性（LDO），PWM |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 车载 |
| 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： | 16-WQFN 裸露焊盘 |
| 供应商设备封装： | 16-TQFN-EP（5x5） |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 125°C |
MAX16835
High-Voltage, 350mA, Adjustable Linear
High-Brightness LED Driver
power series pass device (see the Functional Diagram).
The regulation point is factory set at (V CS+ - V CS- ) =
200mV ±3.5%. The regulated current is user defined by
the value of R SENSE .
The MAX16835 is a current controller internally opti-
mized for driving the impedance range expected from
one or more HB LEDs.
+5V Regulator
The MAX16835 includes a fixed +5V output regulator
that delivers up to 4mA of load current for low-power
applications throughout the +6.5V to +40V input volt-
age range. Connect a 0.1μF compensation capacitor
from V5 to ground. Shorting V5 to ground disables the
thermal shutdown. When EN is low, V5 is off.
Thermal Protection
The MAX16835 enters a thermal-shutdown mode in the
event of overheating. This typically occurs in overload or
output short-circuit conditions. When the junction tem-
perature exceeds T J = +159°C (typ), the internal ther-
mal-protection circuitry turns off the series pass device.
The MAX16835 recovers from thermal-shutdown mode
once the junction temperature drops by 24°C (typ). The
part therefore protects itself by thermally cycling in the
event of a short-circuit or overload condition. Shorting V5
to ground disables the thermal shutdown.
Applications Information
Programming the LED Current
The MAX16835 uses a sense resistor across CS+ and
CS- to set the LED current. The differential sense amplifier
V EN
connected across R SENSE provides ground-loop immu-
nity and low-frequency noise rejection. The LED current
is given by the equation below:
I LED = V SENSE /R SENSE
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;
However, the output current may not meet the full regu-
lation specification.
Low-Frequency PWM
at the Output
The MAX16835 provides pulsed or chopped current
dimming. Generally, HB LEDs are binned to match at
their full-rated current; however, LEDs from the same
bin exhibit poor matching at currents other than full-
rated current. To achieve uniformity, HB LED manufac-
turers recommend PWM pulsing of the LED current at
their full-rated value. There are two methods for pro-
ducing a PWM output. One method is by pulsing the
enable input (EN) while having a constant voltage at IN.
The other method is to connect EN to IN and pulse both
EN and IN. Both methods generate a regulated-ampli-
tude PWM current (variable duty cycle) that can pro-
vide control over the LED brightness (see Figures 1
and 2).
16
OUT
15
EN
14
N.C.
13
N.C.
16
OUT
15
EN
14
N.C.
13
N.C.
1
OUT
GND 12
I LED
1
OUT
GND 12
I LED
V IN
C1
2
3
IN
IN
MAX16835
V5 11
CS- 10
D1
C2
R SENSE
V IN
C1
2
3
IN
IN
MAX16835
V5 11
CS- 10
D1
C2
R SENSE
4
N.C.
CS+ 9
4
N.C.
CS+ 9
N.C.
5
N.C.
6
N.C.
7
N.C.
8
N.C.
5
N.C.
6
N.C.
7
N.C.
8
Figure 1. Pulse Application with V IN at a Constant Voltage
6
Figure 2. Pulse Application with EN Connected to V IN
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16835ATE/V+ | 制造商:Maxim Integrated Products 功能描述:HIGH-VOLTAGE, 350MA, ADJUSTABLE LINEAR HIGH-BRIGHTNESS LED D - Rail/Tube |
| MAX16835ATE/V+T | 制造商:Maxim Integrated Products 功能描述:HIGH-VOLTAGE, 350MA, ADJUSTABLE LINEAR HIGH-BRIGHTNESS LED D - Tape and Reel |
| MAX16835ATE+ | 功能描述:LED照明驱动器 350mA Adj Linear HB 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 |
| MAX16835ATE+T | 功能描述:LED照明驱动器 350mA Adj Linear HB 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 |
| MAX16836ASA+ | 功能描述:LED照明驱动器 MAX17040B Eval Kit 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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