LM3530
- Drives up to 11 LEDs in series
- 1000:1 Dimming Ratio
- 90% Efficient
- Programmable Dual Ambient Light Sensor Inputs
with Internal ALS Voltage Setting Resistors - I2C Programmable Logarithmic or
Linear Brightness Control - External PWM Input for Simple Brightness
Adjustment - True Shutdown Isolation for LEDs and Ambient
Light Sensors - Internal Soft-Start Limits Inrush Current
- Wide 2.7-V to 5.5-V Input Voltage Range
- 40-V and 25-V Overvoltage Protection Options
- 500-kHz Fixed Frequency Operation
- 839-mA Peak Current Limit
The LM3530 current mode boost converter supplies the power and controls the current in up to 11 series white LEDs. The 839-mA current limit and 2.7-V to 5.5-V input voltage range make the device a versatile backlight power source ideal for operation in portable applications.
The LED current is adjustable from 0 mA to 29.5 mA via an I2C-compatible interface. The 127 different current steps and 8 different maximum LED current levels give over 1000 programmable LED current levels. Additionally, PWM brightness control is possible through an external logic level input.
The device also features two Ambient Light Sensor inputs. These are designed to monitor analog output ambient light sensors and provide programmable adjustment of the LED current with changes in ambient light. Each ambient light sensor input has independently programmable internal voltage setting resistors which can be made high impedance to reduce power during shutdown. The 500-kHz switching frequency allows for high converter efficiency over a wide output voltage range accommodating from 2 to 11 series LEDs. Finally, the support of Content Adjusted Backlighting maximizes battery life while maintaining display image quality.
The LM3530 operates over the −40°C to 85°C temperature range.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 |
|---|---|---|---|---|---|
| * | 데이터 시트 | LM3530 High-Efficiency White-LED Driver with Programmable Ambient Light Sensing Capability and I2C-Compatible Interface datasheet (Rev. L) | PDF | HTML | 2014. 12. 23 | |
| 백서 | Common LED Functions and LED Driver Design Considerations | 2020. 9. 21 | |||
| 선택 가이드 | Power Management Guide 2018 (Rev. R) | 2018. 6. 25 | |||
| 애플리케이션 노트 | Analog PWM Dimming in White-LED Drivers | 2016. 12. 21 | |||
| 애플리케이션 노트 | Inductor Selection in Boost Converters for LCD Backlight Applications | 2016. 10. 24 | |||
| 애플리케이션 노트 | Schottky Diode Selection in Asynchronous Boost Converters | 2016. 9. 6 | |||
| 사용 설명서 | AN-1991 LM3530 Evaluation Kit (Rev. A) | 2013. 4. 30 |
설계 및 개발
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LM3530SW-LINUX — LM3530용 Linux 드라이버
The Linux driver supports the LM3530 White LED Driver. The Linux driver supports communication through the I2C bus and interfaces with the LED sub-system.
Linux Mainline Status
Available in Linux Main line: Yes
Available through git.ti.com: N/A
Supported Devices:
- lm3530
Linux Source Files
The files (...)
SNVC045 — LM3530 Graphical User Interface
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| DSBGA (YFQ) | 12 | Ultra Librarian |
| DSBGA (YFZ) | 12 | Ultra Librarian |
주문 및 품질
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.