FM FM6356

FM6356/FM6356B is a driver IC specifically designed for full-color LED display applications. The built-in 16-bit shift register converts serial input data into grayscale pixel values for each output channel. The 16 constant-current output channels of FM6356/FM6356B deliver output current unaffected by the load voltage at the output terminals, providing consistent and stable output current independent of PCB variations, with excellent noise immunity. FM6356/FM6356B not only allows output current adjustment via external resistors of different resistance values, but also supports software-controlled channel current gain adjustment for LED display brightness control. FM6356/FM6356B adopts Fumanchu's proprietary EPWM display technology with intelligent PWM functionality, enhancing low-grayscale visual performance. FM6356/FM6356B supports up to 32-scan LED scanning displays. Through technological innovation, it effectively resolves issues such as low-grayscale color blocks, color deviation, mura, first-row dimming, high-contrast coupling, and cross-panel color discrepancy. Via real-time error detection, FM6356/FM6356B can independently detect open-circuit conditions on each individual LED without additional external components. The novel ghost-cross elimination feature addresses erroneous display of surrounding LEDs caused by defective LED pixels. In addition, the built-in blanking/clamping circuit, combined with different configuration bits, significantly enhances blanking/clamping capability, effectively eliminating top/bottom ghosting and text ghosting artifacts. The coupling optimization enhancement feature greatly improves various display defects including cross-panel coupling, high-contrast coupling, and mid-contrast coupling. A black-screen power-saving function further reduces power consumption during black-screen periods.

• Constant current output range: at 5V supply voltage: 0.5~25mA; at 4.2V supply voltage: 0.5~18mA; at 3.3V supply voltage: 0.5~10mA
• Highly accurate current output: maximum channel-to-channel deviation: <±2%; maximum chip-to-chip deviation: <±2%
• Built-in 16K-bit SRAM supporting up to ~32-scan time-multiplexed scanning
• EPWM grayscale control technology for improved low-grayscale visual performance (Funman patent)
• 8-bit current gain adjustment, 12.5%~200%
• Effectively reduces cross-board coupling and high-contrast coupling issues
• 8-level adjustable constant current knee point
• LED fault detection: eliminates cross-pattern artifacts caused by defective LEDs, LED open-circuit detection
• Built-in blanking and enhanced blanking
• GCLK frequency multiplication technology
• Black screen power saving, reduced black screen power consumption
• Clock frequency up to 30MHz
• Package types: SSOP-24 (e = 0.635mm); AN: QFN-24-4×4-0.5mm; BN: QFN-24-4×4-0.5mm