Controller IC Chip - High-Performance Notebook PWM Controller MOSFET APW7138 APW 7138 chip for laptop - Ολοκληρωμένο τσιπ φορητού υπολογιστή (Κωδ.1-CHIP0299) The APW7138 is a single-phase, constant-on-time, and synchronous PWM controller which drives N-channel MOSFETs. The APW7138 steps down high voltage of a battery to generate low-voltage chipset or RAM supplies in notebook computers. The APW7138 provides excellent transient response and accurate DC voltage output in either PFM or PWM Mode. In Pulse Frequency Modulation (PFM) Mode, the APW7138 provides very high efficiency over light load with loading-modulated switching frequencies. When the inductor current is continuous, the operation automatically enters PWM mode with relatively constant switching frequency. For QFN4x4-16A and TQFN3x3-16 packages, the Forced-PWM Mode works nearly at constant frequency for low-noise requirements. The APW7138 is equipped with accurate over-current, output under-voltage, and over-voltage protections

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