Description

The A8504952112W is a backshell and cable clamp electronic component model used in various applications such as thin notebook displays, LCD TVs, portable DVD players, and GPS systems. It is a multi-output WLED driver with a boost converter and eight current-sinks designed for medium display backlighting. This driver is flexible in channel selection control, and the high voltage capability enables a wide range of LED backlight applications.

Specifications and features

The A8504 has several features and benefits, including active current sharing between 6 LED strings for ±1.3% typical current matching, ±1.2% typical current accuracy, and the ability to drive up to 11 series x 8 parallel = 88 LEDs (Vf = 3.5 V, If = 40 mA). It also has an external PWM control for LED dimming and an external resistor for LED current setting. The boost converter is integrated with a 50 V, 2 A DMOS and LED sinks rated for 45 mA. The A8504 has a switching frequency range of 200 kHz to 2 MHz, an open LED disconnect, boost current limit, thermal shutdown, and soft start. Other features include no audible ceramic capacitor noise during PWM dimming and adjustable overvoltage protection (OVP). No pull-up resistors are required for LED modules that use ESD capacitors.

Application Scenarios

The A8504952112W component model can be used primarily in backshells and cable clamps in various applications such as thin notebook displays, LCD TVs, portable DVD players, GPS systems, and RGB backlight.

Comparison

• Flexible channel selection control
• High voltage capability enables a wide range of LED backlight applications
• Active current sharing between 6 LED strings for ±1.3% typical current matching
• External PWM control and resistor for LED dimming and current setting
• Boost converter with integrated 50 V, 2 A DMOS
• Switching frequency range of 200 kHz to 2 MHz
• No audible ceramic capacitor noise during PWM dimming
• Adjustable overvoltage protection (OVP)

• Not suitable for heavy or advanced LED backlight applications
• The maximum number of LEDs that can be driven is limited to 88
• Specifically designed only for medium display backlighting