The MPQ3368AGRE is a boost controller with an 8-channel current source, designed to drive white LED (WLED) arrays in small- and medium-sized LCD panel backlight applications. The device employs a peak current mode and pulse-width modulation (PWM) control architecture to regulate the boost converter, and applies the 8-channel current sources to the LED cathodes to regulate LED brightness.

The MPQ3368AGRE regulates the current in each LED string to the value set by an external current-setting resistor, with a current matching accuracy between strings of 2.5%. The device drives an external MOSFET with a powerful gate driver signal and selectable rise/fall times. It also provides an easy-to-use standard I2C digital interface. The switching frequency (fSW) can be configured via resistor, I2C interface, or external clock.

The MPQ3368AGRE offers low headroom voltage to improve efficiency and IC thermal performance. It also provides analog, PWM, and hybrid dimming modes via PWM input or internal registers. The dimming mode can be selected through the I2C interface. The device also features a phase-shift function to reduce inrush current and eliminate audible noise during PWM dimming.

The MPQ3368AGRE includes comprehensive protection features to ensure safe operation, specifically including over-current protection (OCP), over-voltage protection (OVP), over-temperature protection (OTP), VOUT-to-GND short protection, LEDx-to-GND short protection, as well as LED short and open protection. In addition, the LED current (ILEDx) can be automatically reduced based on the NTC pin detection.

The MPQ3368AGRE is available in a QFN-24 (4x4mm) package and is AEC-Q100 Grade 1 qualified.

Product Features and Benefits

• 3.8V to 36V input voltage (VIN) range

• 8 channels, up to 200mA per channel

• Configurable switching frequency (fSW) up to 2.2MHz

• External synchronization switching (SW) function

• Multiple dimming operation modes via PWM input or internal registers, including:

-- Direct and internal PWM dimming (15-bit)

-- Analog dimming (10-bit)

-- Hybrid dimming with 25%/12.5% switching points

• In direct PWM dimming mode, dimming ratio ≥10000:1 when PWM frequency (fPWM) ≤200Hz

• Excellent EMI performance with spread spectrum (FSS) function

• 4 configurable I2C addresses via I2C interface

• Phase-shift function for PWM dimming

• 2.5% current matching accuracy

• Cycle-by-cycle current limit

• Output voltage (VOUT) disconnect from VIN

• External temperature sensing via negative temperature coefficient (NTC)

• LED short/open protection, OCP, OVP, OTP, and inductor/diode short protection

• VOUT-to-GND short protection and LEDx-to-GND short protection

• Configurable OVP threshold and LED short protection threshold

• Fault indicator signal output

• QFN-24 (4x4mm) package

• AEC-Q100 Grade 1 qualified

Internal Block Diagram

The AP8000 universal programmer independently developed by Acroview 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 provides both online and offline operating modes. It has developed dedicated programming solutions for memory chips such as eMMC and UFS, and can fully cover the offline bare-chip programming and on-board programming requirements of MPS’s full range of chips. The AP8000 adopts an innovative modular design with three core modules – mainframe, baseboard, and adapter – endowing the device with excellent compatibility and expandability. As a universal programming platform, it not only adapts to various programmable chips on the market, but also, with its stable and efficient performance, serves as the core component of Acroview’s automated batch programming system IPS5800S, efficiently handling large-scale chip programming tasks to meet mass production requirements.

The AP8000 mainframe features flexible connectivity, equipped with both USB and NET interfaces, enabling convenient networking of multiple programmers. Through the networking function, users can easily achieve synchronized control of multiple programmers and efficiently carry out parallel programming operations. In terms of security, the mainframe incorporates an intelligent safety protection circuit that monitors chip placement status and circuit connections in real time. Once abnormal conditions such as chip reverse insertion or short circuits are detected, it immediately triggers a power-off protection mechanism, safeguarding the chip and programmer throughout operation. The mainframe is equipped with a high-speed FPGA chip that greatly enhances data transmission and processing efficiency, ensuring a smooth and efficient programming process. To enhance user convenience, an SD card slot is provided on the rear of the mainframe. Users simply store the project files generated on a PC to an SD card, insert it into the slot, and then use the programmer’s physical buttons to select, load, and execute programming operations, enabling standalone operation without a PC. This design not only reduces dependency on computer hardware configurations but also simplifies the workspace setup process, significantly improving operational flexibility.

In terms of expandability and compatibility, the AP8000 adopts a modular combination design of baseboard and adapter board, effectively extending the mainframe’s functional boundaries. Currently, the device supports products from all major semiconductor manufacturers, covering well-known brands such as SK hynix, Micron, SANDISK, ASR, and Kingston. The supported device types are extensive, including NAND, NOR, MCU, CPLD, FPGA, EMMC, etc., and it is fully compatible with a variety of industry-standard file formats such as Intel Hex, Motorola S, Binary, and POF, providing users with a one-stop, full-scenario chip programming solution.

Company Introduction

About MPS: Monolithic Power Systems (MPS) is a globally renowned high-performance analog semiconductor company headquartered in San Jose, California, USA. Founded in 1997, the company possesses proprietary innovative process technologies and focuses on designing and defining high-performance power management solutions as an analog and mixed-signal semiconductor company. It currently has over 4,000 self-developed power management products widely used in industrial, communications infrastructure, cloud computing, automotive, and consumer electronics applications.

About Acroview: Acroview Technology is a national-level "Little Giant" specialized and innovative enterprise engaged in the R&D, production, and sales of semiconductor chip testing and programming equipment. The company is committed to empowering the entire industrial chain – including Fabless, IDM, OSAT, wafer fabs, and end-device manufacturers – through innovative semiconductor testing technologies and solutions. Acroview’s pioneering automated burn-in system ABI (Auto Burn-In) has significantly improved customers’ chip burn-in testing efficiency and reduced per-DUT testing costs. Additionally, the company provides equipment products and solutions across various stages including PSV, CP, FT, ABI, SLT, and programming. By perfectly integrating its leading technological advantages, system-level expertise, and globally distributed R&D and sales service networks, Acroview creates value for customers to gain a competitive edge in the market.