Linear Technology’s new LT8500 is a pulse width modulation (PWM) generator with 48 independent channels.
Each channel has an individually adjustable 12-bit (4096 steps) PWM register and a 6-bit (64 step) ±50% correction register. All controls are programmable via a simple TTL/CMOS 50 MHz serial data interface.
The IC can be used in a wide variety of PWM-intensive applications such as LED control, as well as industrial and robotic applications. For example, it can be used with three LT3595As, 16-channel LED drivers, to deliver 48 independently dimmed LED strings for locally dimmed LED backlighting for large LCD displays. The correction resister allows matching the light output of each LED string.
The LT8500 operates from a 3 V to 5,5 V input range, enabling it to operate from a wide range of standard power buses. For LED applications, each channel has individual 6-bit dot correction current adjustment and 12-bit grey scale PWM dimming. The 40 ns on-time of the device offers very wide dynamic contrast ratios. Both correction and grey scale dimming are accessible via a serial interface in TTL/CMOS logic.
The chip offers two diagnostic information flags: synchronisation error and open LED. The flags are sent with additional state information, on the serial data interface during status read back. The 50 MHz cascadable serial data interface includes buffering and skew balancing, easing the design for PWM-intensive applications such as large screen LCD dynamic backlighting. The combination of minimal externals and a 5 x 9 mm QFN package provide a highly compact solution footprint for multichannel PWM applications.
Cost-effective microcontroller series Altron Arrow
DSP, Micros & Memory
The STM32C5 series from STMicroelectronics delivers an excellent balance of performance, efficiency, and affordability for embedded designs that require more capability without increasing bill of materials cost.
Read more...Understanding two key tools for cleaner serial data Altron Arrow
Editor's Choice Analogue, Mixed Signal, LSI
Understanding how pre-emphasis and equalisation works, and when to use one over the other, is critical when designing reliable high-speed systems.
Read more...Ultra-low jitter clocks Altron Arrow
Telecoms, Datacoms, Wireless, IoT
Skyworks has introduced a new family of ultra-low jitter programmable clocks designed to meet the increasing demands of next-gen connectivity.
Read more...Efficient Bluetooth SoC Altron Arrow
Telecoms, Datacoms, Wireless, IoT
The EFR32BG29 wireless SoC from Silicon Labs is a highly efficient, high memory, low-power, and ultra compact SoC designed for secure and high-performance wireless networking for IoT devices.
Read more...RTOS – The future of embedded systems Altron Arrow
Edge Computing & IIoT
At the heart of the next generation of embedded devices is efficient yet powerful system-level code, often based on an open-source real-time operating system.
Read more...Reference design for NB-IoT plus GNSS Altron Arrow
Design Automation
ST Microelectronics’ STDES-ST87M01IGN is a reference design for the ST87M01 NB-IoT + GNSS module, implemented on a 2-layer FR4 PCB (90 x 60 x 1,6 mm).
Read more...Gen5 Pro enhances power conversion Altron Arrow
Power Electronics / Power Management
The Infineon Technologies CoolSET ICE501XD and ICE502XD PWM Fixed Frequency Gen5 Pro controllers are advanced solutions for auxiliary power supplies in demanding high-voltage applications.
Read more...Compact 6 A automotive buck converter Altron Arrow
Power Electronics / Power Management
Delivering up to 6 A of continuous output current, the DCP0606Y from STMicroelectronics enables efficient regulation of low-voltage rails commonly used in modern vehicle electronics and industrial systems.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version