P1817A

P1817A, P1817B Product Preview Low-Power Mobile VGA EMI Reduction IC Description The P1817 is a versatile spread spectrum frequency modulator designed specifically for input clock frequencies. The P1817 reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of down stream clock and data dependent signals. The P1817 allows significant system cost savings by reducing the number of circuit board layers, ferrite beads, shielding and other passive components that are traditionally required to pass EMI regulations. The P1817 modulates the output of a single PLL in order to “spread” the bandwidth of a synthesized clock, and more importantly, decreases the peak amplitudes of its harmonics. This results in significantly lower system EMI compared to the typical narrow band signal produced by oscillators and most frequency generators. Lowering EMI by increasing a signal’s bandwidth is called ‘spread spectrum clock generation.’ The P1817 uses the most efficient and optimized modulation profile approved by the FCC and is implemented in a proprietary all digital method. http://onsemi.com SOIC−8 S SUFFIX CASE 751BD TSSOP−8 T SUFFIX CASE 948AL PIN CONFIGURATION 1 CLKIN / XIN XOUT VSS VDD SR0 REF SSON / SBM ModOUT Applications The P1817 is targeted towards notebook LCD displays, and other displays using an LVDS interface, PC peripheral devices, and embedded systems. Features FCC Approved Method of EMI Attenuation Generates a Low...