Leading chip programming company Acroview Technology announced the release of a new version of its programming software and the further expansion of its compatible chip model portfolio. The company's core product—the universal programming platform AP8000—has now achieved full compatibility with RICHTEK's LED driver RT4540GQW.

The RT4540GQW is a high-efficiency white LED driver suitable for single-cell/two-cell battery input, capable of driving LED strips composed of six parallel strings. It features a built-in constant-current driver chip with a maximum channel-to-channel current matching error of only ±2%, ensuring highly uniform brightness across each LED string. To maintain the necessary voltage headroom for stable operation of the constant-current driver, the boost controller continuously monitors the minimum voltage at the feedback pin and adjusts the output voltage for optimal efficiency.

The RT4540GQW integrates an I²C interface for configuring dimming modes, operating frequency, and LED drive current. It includes a built-in 250mΩ, 36V-rated power switch and employs a current-mode control architecture with overcurrent protection.

The switching frequency of the RT4540GQW can be flexibly adjusted from 100kHz to 1.6MHz, balancing efficiency with the need for miniaturized external components. The device is offered in a compact 3×3mm WQFN-24L package with a 0.4mm pin pitch.

Key Features

• Wide Operating Input Voltage Range: 2.7V to 24V
• High Output Voltage: Up to 36V
• Programmable Channel Current: 6mA to 25mA
• Channel Current Adjustment Accuracy: ±3%, Current Matching: ±2%
• Dimming Control Modes
-Direct PWM Dimming: Up to 25kHz frequency, minimum 1% duty cycle
-PWM-to-Analog Dimming: 12-bit resolution at 2kHz, 11-bit at 4kHz, 10-bit at 8kHz
-PWM-to-Hybrid Dimming: 12-bit resolution at 2kHz, 11-bit at 4kHz, 10-bit at 8kHz
-PWM-to-26kHz Hybrid Dimming: 12-bit resolution at 2kHz, 11-bit at 4kHz, 10-bit at 8kHz
• I²C Bus Programming Support: Configurable LED current, switching frequency, and dimming mode
• Switching Frequency Range: 100kHz to 1.6MHz
• Built-in Multiple-Time Programmable (MTP) Memory
• Protection Features
-LED String Open-Circuit Protection
-Current Limiting Protection
-Programmable Overvoltage Protection
-Overtemperature Protection
-LED String Short-Circuit Detection

Applications

• Tablet and Notebook LED Backlighting

Internal Block Diagram

Independently developed by Acroview Technology, the AP8000 Universal Programmer has become a benchmark professional programming solution in the industry. The device supports flexible and configurable one-to-one and one-to-eight configurations and offers both online and offline operating modes. It features dedicated programming solutions developed specifically for memory chips like eMMC and UFS, fully meeting the offline bare-die and on-board programming requirements for RICHTEK's full range of chips. With its innovative modular design consisting of three core modules—Main Unit, Baseboard, and Adapter Socket—the AP8000 provides excellent compatibility and expandability. As a universal programming platform, it is not only compatible with various programmable chips on the market but also serves as the core component of Acroview's automated mass production programming system, the IPS5800S, delivering stable and efficient performance to handle large-scale chip programming tasks and meet production volume demands.

The AP8000 Main Unit offers flexible connectivity options, featuring both USB and NET interfaces for convenient networking of multiple programmers. The networking function allows users to easily achieve synchronized control of multiple units, enabling efficient parallel programming operations. In terms of safety, the main unit incorporates an intelligent protection circuit that monitors chip placement status and circuit connections in real-time. Upon detecting anomalies such as reversed chip insertion or short circuits, it immediately triggers a power-off protection mechanism, comprehensively safeguarding both the chip and the programmer. The main unit is equipped with a high-speed FPGA chip, significantly enhancing data transfer and processing efficiency to ensure a smooth and fast programming process. To improve user convenience, an SD card slot is located on the back of the main unit. Users can simply save project files generated on a PC to an SD card, insert it into the slot, and then use the physical buttons on the programmer to select, load, and execute programming tasks, enabling standalone operation without a PC. This design not only reduces dependency on computer hardware but also simplifies the setup process, significantly enhancing operational flexibility.

In terms of expandability and compatibility, the AP8000 adopts a modular combination design of baseboard and adapter boards, effectively extending the functional boundaries of the main unit. Currently, the device supports products from all major semiconductor manufacturers, covering well-known brands such as SK hynix, Micron, SANDISK, ASR, and Kingston. It supports a wide range of device types, including NAND, NOR, MCU, CPLD, FPGA, eMMC, etc., and is fully compatible with various industry-standard file formats like Intel Hex, Motorola S, Binary, and POF, providing users with a one-stop, full-scenario chip programming solution.

Company Introduction

About RICHTEK: Founded in 1998, RICHTEK is an international analog IC design company dedicated to providing customers with diverse, competitive products and complete power management solutions. Since its inception, RICHTEK has focused on integrating technological capabilities, insisting on quality, and providing proactive customer service, aiming to deliver value to its customers. Its products are widely used in computers, consumer electronics, network communication devices, large-size panel displays, and other fields.

About Acroview: Acroview is a national-level "Little Giant" enterprise specializing in the R&D, production, and sales of semiconductor chip testing and programming equipment. The company is dedicated to empowering customers across the entire industry chain, including Fabless, IDM, OSAT, Wafer Fab, and end-device manufacturers, through innovative semiconductor testing technologies and solutions. Acroview's pioneering fully automatic aging test ABI (Auto Burn-In) system greatly improves customers' chip aging test efficiency and reduces per-DUT testing costs. The company also provides equipment products and solutions for all stages, from PSV, CP, FT, ABI, SLT to programming. By perfectly integrating product technology leadership, system-level expertise, and a globally distributed R&D and sales service network, Acroview creates value for customers, helping them gain a competitive edge in the market.