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参数资料
| 型号： | MAX16840EVKIT+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/12页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR MAX16840 LED DVR |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 5 |
| 输出及类型： | 1，非隔离 |
| 特点： | 可调光 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MAX16840 |
MAX16840
LED Driver with Integrated MOSFET
for MR16 and Other 12V AC Input Lamps
Functional Diagram
IN
200mV
I 0
IN
5V
1/6
1.2V
I 1
S
LDO +
BANDGAP
5V
BG
UVLO
POK
50μA
EXT
REFI
5k I
g m
4pF
PWMC
DRAIN
COMP
2V P-P
0.65V
DRIVER
CSLIMIT
OSCILLATOR
SOURCE
FB
50ns
BLANKING
MAX16840
IN
BG
OVP
GND
Detailed Description
The MAX16840 is an average current-mode control LED
driver IC for buck, boost, and buck-boost topologies in
low-voltage SSL applications. The IC has an integrated
0.2 I (max), 48V switching MOSFET that allows the
device to be used in lighting applications for MR16 and
other SSL applications. The LED driver uses constant-
frequency average current-mode control to control the
duty cycle of the integrated switching MOSFET. The IC
has all the necessary features required for MR16 lighting
applications using LEDs. The IC uses an input-current
control scheme to achieve power factor correction. This
feature allows the IC to be compatible with electronic
transformers and dimmable with trailing-edge (for elec-
tronic transformers).
6
The switch current is sensed on FB. The voltage on FB
goes through an RC filter as shown in the Functional
Diagram . This voltage is then fed to the negative input
of a transconductance amplifier. The positive input of
the g m amplifier is the programmed input current level.
The output voltage of the g m amplifier is compared with
a ramp at the switching frequency to set the duty cycle.
The switching frequency is set at 300kHz. The average
current-mode controller inside the IC regulates the input
current. The IC also features an internal overvoltage
protection of 46V on IN to protect the internal switching
MOSFET from damage if the LED string is open or if the
voltage on the LED string is too high.
Maxim Integrated
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相关代理商/技术参数 |
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| MAX16840EVKIT# | 功能描述:LED 照明开发工具 MAX16840 Eval Kit RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: |
| MAX16840EVKIT+ | 功能描述:LED 照明开发工具 MAX16840 Eval Kit RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: |
| MAX16841ASA+ | 功能描述:LED照明驱动器 Wide Input Offline w/Dimming 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 |
| MAX16841ASA+T | 功能描述:LED照明驱动器 Wide Input Offline w/Dimming 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 |
| MAX16841BEVKIT# | 功能描述:LED 照明开发工具 RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: |
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