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参数资料
| 型号： | MAX16834ATP+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 11/23页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVR HIGH BRIGHT 20-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 特色产品： | MAX16834 High-Power LED Driver |
| 标准包装： | 75 |
| 拓扑： | PWM，SEPIC，降压（降压），升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 无 |
| 类型 - 主要： | 车载，背光 |
| 类型 - 次要： | 高亮度 LED（HBLED），RGB |
| 频率： | 100kHz ~ 1MHz |
| 电源电压： | 4.75 V ~ 28 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WFQFN 裸露焊盘 |
| 供应商设备封装： | 20-TQFN-EP |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 125°C |
MAX16834
High-Power LED Driver with Integrated High-Side LED
Current Sense and PWM Dimming MOSFET Driver
V IN
C1
L1
R1
LV
FLT
D1
LED+
C3
IN
UVEN
NDRV
Q1
LEDs
C2
HV
SC
MAX16834
CS
ON
R4
R3
PWMDIM
OFF
LED-
R2
C5
C4
RT/SYNC
V CC
REF
DIMOUT
SENSE+
Q2
OVP+
R5
R6
CLV
REFI
SGND
COMP
PGND
C7
C6
R8
R9
R10
C8
R7
Figure 2. Boost LED Driver
Programming the LED Current
Calculate maximum duty cycle using the below equation.
The LED current is programmed using the voltage on
REFI and the LED current-sense resistor R10 (see
Figure 2). The current is given by:
D MAX =
V LED + V D ? V INMIN
V LED + V D ? V FET
I LED =
V REF × R 5
R 10 × ( R 6 + R 5 ) × 9 . 9
( A )
where V LED is the forward voltage of the LED string in
volts, V D is the forward drop of the rectifier diode D1 in
where V REF is 3.7V and the resistors R5, R6, and R10
are in ohms. The regulation voltage on the LED current-
sense resistor must not exceed 0.3V to prevent activa-
tion of the LED short-circuit protection circuit.
Boost Configuration
In the boost converter (Figure 2), the average inductor
current varies with the line voltage. The maximum aver-
age current occurs at the lowest line voltage. For the
boost converter, the average inductor current is equal
to the input current.
Maxim Integrated
volts (approximately 0.6V), V INMIN is the minimum input
supply voltage in volts, and V FET is the average drain to
source voltage of the MOSFET Q1 in volts when it is on.
Use an approximate value of 0.2V initially to calculate
D MAX . A more accurate value of the maximum duty
cycle can be calculated once the power MOSFET is
selected based on the maximum inductor current.
Use the following equations to calculate the maximum
average inductor current IL AVG , peak-to-peak inductor
current ripple ? I L , and the peak inductor current IL P in
amperes:
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16834ATP/V+ | 功能描述:LED照明驱动器 w/Int Hside Crnt Sns & PWM Dim MOSFET 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 |
| MAX16834ATP/V+CEU | 制造商:Maxim Integrated Products 功能描述:HIGH-POWER LED DRIVER WITH INTEGRATED HIGH-SIDE LED CURRENT - Rail/Tube |
| MAX16834ATP/V+T | 功能描述:LED照明驱动器 w/Int Hside Crnt Sns & PWM Dim MOSFET 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 |
| MAX16834ATP/V+TCEU | 制造商:Maxim Integrated Products 功能描述:HIGH-POWER LED DRIVER WITH INTEGRATED HIGH-SIDE LED CURRENT - Tape and Reel |
| MAX16834ATP+ | 功能描述:LED照明驱动器 w/Int Hside Crnt Sns & PWM Dim MOSFET 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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