- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385493 > LP3936SLX (NATIONAL SEMICONDUCTOR CORP) Lighting Management System for Six White LEDs and One RGB or FLASH LED PDF資料下載
參數(shù)資料
| 型號(hào)： | LP3936SLX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 顯示驅(qū)動(dòng)器 |
| 英文描述： | Lighting Management System for Six White LEDs and One RGB or FLASH LED |
| 中文描述： | LED DISPLAY DRIVER, QCC32 |
| 封裝： | 4.5 X 5.5 MM, 0.80 MM HEIGHT, 0.50 PITCH, CSP-32 |
| 文件頁(yè)數(shù)： | 12/20頁(yè) |
| 文件大?。?/td> | 520K |
| 代理商： | LP3936SLX |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)當(dāng)前第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)
A/D Converter for Ambient Light Measurement
(Continued)
20081416
Magnetic Boost DC/DC Converter
The LP3936 Boost DC/DC Converter generates a 4.1V–5.3V supply voltage for the LEDs from single Li-Ion battery (3V … 4.5V).
The output voltage is controlled with an 8-bit register in 9 steps. The converter is a magnetic switching PFM/PWM mode DC/DC
converter with a current limit. The converter has a 1 MHz switching frequency when timing resistor RT is 82 k
.
The topology of the magnetic boost converter is called CPM control, current programmed mode, where the inductor current is
measured and controlled with the feedback. The user can program the output voltage of the boost converter. The control changes
the resistor divider in the feedback loop.
The following figure shows the boost topology with the protection circuitry. Three different protection schemes are implemented:
1) Over voltage protection, limits the maximum output voltage
a. Keeps the output below breakdown voltage.
b. Prevents boost operation if battery voltage is much higher than desired output.
2) Over current protection, limits the maximum inductor current
a. Voltage over switching NMOS is monitored; too high voltages turn the switch off.
3) Duty cycle limiting, done with digital control.
20081417
L
www.national.com
12
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LP3939 | Power Amplifier Driver For Dual Band CDMA Handsets |
| LP3939ILQ | Power Amplifier Driver For Dual Band CDMA Handsets |
| LP3939ILQX | Power Amplifier Driver For Dual Band CDMA Handsets |
| LP3943 | RGB/White/Blue 16-LED Fun Light Driver |
| LP3943ISQ | RGB/White/Blue 16-LED Fun Light Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP3936SLX/NOPB | 功能描述:LED照明驅(qū)動(dòng)器 RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| LP3937ILQ-AL | 制造商:Texas Instruments 功能描述:Electronic Component |
| LP3939 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Power Amplifier Driver For Dual Band CDMA Handsets |
| LP3939-ES1 | 制造商:Texas Instruments 功能描述:TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, PQCC16 |
| LP3939ILQ | 制造商:Texas Instruments 功能描述:TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, PQCC16 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。