Diodes introduced mode programmable synchronous boost converter to improve energy efficiency of consumer devices

     Diodes introduced a high efficiency synchronous boost converter. The AP72250 provides boost conversion capability and is designed for compact consumer and industrial product applications, including battery powered devices, USB power supplies, mobile power supplies, super capacitor charging devices, and metering systems.the AP72250 is packaged in WLCSP-12 (1.75mm x 1.35mm x 0.45mm).

     The AP72250 supports 900kHz switching frequency and 20 µ A static current (IQ), and covers a wide input voltage range of 0.6V to 5.5V. The minimum starting voltage is 1V, and the output voltage range is 1.7V to 5.5V. This boost converter also incorporates 20m Ω high side and 26m Ω low side power MOSFETs.

     AP72250 can select multiple operation modes and program according to user requirements. The modes include pulse frequency modulation (PFM), ultrasound (USM) and forced pulse width modulation (FPWM). In the case of heavy load or light load, engineers can choose the mode to adjust the operation to achieve maximum efficiency. Therefore, even under light load, the maximum efficiency can still be maintained at 89%. The ultrasonic mode (USM) can prevent switching within the audible frequency range.

     With excellent line and load transient response, the AP72250 can seamlessly switch between boost and pass through modes in product applications where necessary. The peak current mode control mechanism of the AP72250 enables it to handle various input and output ratios. Therefore, compared with other solutions in the industry, it can significantly reduce the number of external components required, thereby reducing the bill of materials (BOM) cost. In addition, there are undervoltage locking, overheating protection, peak current limit, negative current limit, and output short circuit protection functions.