STMicroelectronics’ Backlight Driver for High-Tech Handhelds Saves Power, Time and Money

- Miniature control IC for energy-efficient white-LED backlights simplifies circuit design

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2011-10-04 10:27

SEOUL--(뉴스와이어)--STMicroelectronics (NYSE: STM), a global semiconductor leader serving customers across the spectrum of electronics applications, has extended its portfolio of energy-saving solutions for mobile devices with a new IC that simplifies the design of power-efficient LCD and keypad backlights comprising white LEDs.

Backlights built with white LEDs, instead of traditional fluorescent tubes, consume less power enabling longer battery life for portable devices such as smartphones, games and GPS terminals. ST’s new chip, the STLA02, improves backlight design further by performing high-side current sensing, which allows the backlight negative (low-side) terminal to be connected directly to ground with no need for a low-side sensing connection. This simplifies pc-board design, reduces wired connections to the backlight, and increases system reliability.

The STLA02 can drive up to six LEDs and can operate from a supply voltage as low as 2.5V, allowing its use in systems powered by only a single lithium cell. The maximum input voltage of 18V also allows use with a variety of other battery types.

The STLA02 expands ST’s already large portfolio of devices that help reduce size and increase battery life in feature-rich portable products, leveraging in-house process technologies for class-leading integration and power efficiency. These include highly efficient DC-DC converters, audio ICs and class-D amplifiers, ambient light sensors, motion sensors, and high-performance low-power microcontrollers such as the STM8 and STM32 families.

Key features of STLA02:
- Boost (step-up) DC-DC converter topology
- Battery supply voltage range: 2.5V to 18V
- Maximum LED driving voltage: 27V
- Output current: 20mA per LED
- Switching frequency: 2.3MHz
- PWM dimming range: 300:1
- Enable pin with fast response due to current-mode regulation
- Built-in over-temperature and over-voltage protection

The STLA02 is in full production in the 6-lead DFN6 package, priced from $0.892 for orders over 1000 units. Alternative pricing options may be available for larger quantities.

For further information please visit www.st.com/vregs

ST마이크로일렉트로닉스 개요
ST마이크로일렉트로닉스는 혁신적인 반도체 솔루션을 다양한 전자 애플리케이션 분야의 고객들에게 제공하고 있는 세계적인 선도업체이다. ST는 자사의 방대한 기술, 설계 전문기술 및 IP 포트폴리오 통합, 전략적 협력업체와 강력한 제조시설 등을 활용하여 멀티미디어 컨버전스 및 전력 애플리케이션 분야에서 명실상부한 선도업체가 되는 것을 목표로 하고 있다. ST의 2010년도 매출은 103억 5,000만 달러이다. ST에 대한 보다 상세한 정보는 www.st.com를 참조하라.

웹사이트: http://www.st.com