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参数资料
| 型号： | MAX16840ATB+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 8/12页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR MR16 12/24VAC 10TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 拓扑： | SEPIC，降压（降压），升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 通用 |
| 频率： | 300kHz |
| 电源电压： | 6.5 V ~ 40 V |
| 输出电压： | 48V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 供应商设备封装： | 10-TDFN-EP（3x3） |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 125°C |
| 其它名称： | MAX16840ATB+TDKR |
MAX16840
LED Driver with Integrated MOSFET
for MR16 and Other 12V AC Input Lamps
COMP
INPUT
CONTROL
L1
LED+
RCF
VOLTAGE
MAX16840
CP
CZ
g m
PWMC
DRIVER
Figure 1. Control Loop
2V P-P
10pF
5k I
SOURCE
FB
RCS
Peak-Limit Comparator
The IC has a peak-limit comparator that limits the peak
current in the switching MOSFET. If the current-sense
voltage on FB exceeds 0.65V, the peak-limit comparator
terminates switching for that switching cycle. This limits
the peak current in the switching MOSFET and the induc-
tor during transients.
PWM Comparator
The PWM comparator (PWMC) determines the on-time of
the switching MOSFET on a cycle-by-cycle basis by com-
paring the output of the g m amplifier to a 2V P-P ramp sig-
nal. At the start of each clock cycle, an RS flip-flop resets
and the gate driver turns on the switching MOSFET. The
comparator sets the flip-flop as soon as the ramp signal
exceeds the COMP voltage, thus terminating the on cycle.
8
Current-Reference Input (REFI)
The IC has a current-reference input (REFI). For V REFI >
1.2V, an internal reference sets the input average cur-
rent to 200mV/RCS. For V REFI < 1.2V, the input current
is reduced proportionally to V REFI , and it can be reduced
down to zero. The maximum withstand voltage of this
input is 6V. REFI has an internal current source of 50 F A,
and the voltage on REFI can also be set with a resistor to
ground on REFI. This pin can also be used with an NTC
resistor on the pin to achieve thermal foldback.
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16840ATE+ | 功能描述:LED照明驱动器 MR16 LED Driver w/Int 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 |
| MAX16840ATE+T | 功能描述:LED照明驱动器 MR16 LED Driver w/Int 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 |
| 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 |
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