The MPS MPQ2484 Multi-Topology LED Controllers switching frequency (fSW) is set by the FSET pin, or it can be synchronized by a 100kHz to 2.2MHz external clock signal. Furthermore, the MPQ2484 provides a configurable frequency spread spectrum (FSS) function that periodically allows dither switching to improve EMI. The MPQ2484 Controllers support a dimming switch mode with a P-channel MOSFET. Without a P-channel MOSFET during normal operation, the device can select two-step or PWM dimming.
The devices feature robust fault protections, including thermal shutdown, cycle-by-cycle peak current limiting, output over-voltage protection (OVP), output short-circuit protection (SCP), LED open protection, and LED short protection. The MPQ2484's fault indicator outputs an active logic low signal in case of a fault.
The MPQ2484 is housed in a TSSOP-28EP package.