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参数资料
| 型号： | MAX8830EWE+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 8/16页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGT 16-UCSP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 拓扑： | 线性（LDO），PWM，升压（升压） |
| 输出数： | 5 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光，闪灯/白光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 750kHz ~ 1.25MHz |
| 电源电压： | 2.7 V ~ 5.5 V |
| 输出电压： | 3.8 V ~ 5.2 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WLP |
| 供应商设备封装： | 16-WLP（2x2） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
LED Light Management IC in
2.5mm x 2.5mm UCSP
L1*
10 μ H
LX
MAX8830
OUT
I OUT
400mA**
V IN
2.7V TO 5.5V
C IN
10 μ F
IN
GND
PGND
CHIP POWER
AND
REFERENCE
nFET
PWM
BOOST
CONVERTER
pFET
-
+
V REF
C OUT
10 μ F
R COMP
COMP
C COMP
1MHz
4
4
320mA
FLASH
MOVIE ON /OFF
MVON
FLED
LED
5
FLASH ON /OFF
FLEN
FLASH
MAX TIMER
2
LED1
(0.5/1.0/1.5/2.0s)
5
SERIAL
INTERFACE
SCL
SDA
I 2 C
PORT
8
REGISTERS
AND
LOGIC
5
LED2
LED3
V LOGIC
V DD
5
C VDD
0.1 μ F
*L1 = TOKO 1098AS-100M
**GUARANTEED OUTPUT CURRENT FOR EXTERNAL CIRCUITRY IS 400mA MINUS THE SUM OF ALL LED CURRENTS.
Figure 1. Block Diagram and Typical Application Circuit
LED4
Detailed Description
The MAX8830 light management IC integrates a 400mA
PWM step-up DC-DC converter, a 320mA white LED
camera flash current sink, and four programmable LED
current sinks. An I 2 C interface controls individual on/off
of all outputs, step-up output voltage setting, movie/
flash current and flash timer-duration settings, and indi-
vidual current sink settings. Figure 1 shows the block
diagram and typical application circuit.
Step-Up Converter (LX, OUT, COMP, PGND)
The MAX8830 includes a fixed-frequency, PWM step-up
converter that supplies power to the LEDs and additional
loads, such as audio amplifiers. The output voltage is
programmable from 3.8V to 5.2V (in 100mV steps)
through the I 2 C port. If the output voltage is not pro-
grammed, the step-up converter remains off; however, if
any of the current regulators are programmed, the boost
converter p-channel synchronous rectifier is turned on.
The step-up converter switches an internal power
MOSFET and synchronous rectifier at a constant 1MHz
frequency with varying duty cycle up to 75% to maintain
constant output voltage as V IN and load vary. Internal
circuitry prevents any unwanted subharmonic switching
by forcing a minimum 4% duty cycle.
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8831EVKIT+ | 功能描述:LED 照明开发工具 High Efficiency White LED Step-Up Converter with I2C Interface in 2mm x 2mm WLP 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: |
| MAX8831EWE+ | 制造商:Maxim Integrated Products 功能描述: |
| MAX8831EWE+T | 功能描述:LED照明驱动器 White LED Step-Up Converter 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 |
| MAX8833ETJ+ | 功能描述:直流/直流开关调节器 Dual 3A 2MHz Step-Down Regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX8833ETJ+T | 功能描述:直流/直流开关调节器 Dual 3A 2MHz Step-Down Regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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