AC/DC Switching Regulators

The On-Bright OB2263MP is a highly integrated current-mode PWM controller IC optimised for cost-effective, high-performance offline flyback converter designs in the sub-30W power range, targeting chargers, adapters, and consumer power supply applications. Operating from a VDD supply of 10V to 30V with an externally programmable switching frequency trimmed to 60kHz–70kHz and a maximum duty cycle of 75%, the OB2263MP achieves low standby power through extended burst mode operation at no-load and light-load conditions. On-Bright’s proprietary frequency shuffling technique delivers excellent EMI performance, while internal slope compensation, leading-edge blanking on the CS input, and a complete protection suite — including OCP, OLP, UVLO, and 18V gate drive clamp — minimise external component count and system cost. ABL Semi supplies the OB2263MP as a 100% authentic On-Bright product in SOT-23-6, SOP-8, and DIP-8, with flexible MOQ and pin-to-pin compatibility to popular Western flyback PWM controllers.

The Chipown PN8034 is a highly integrated non-isolated AC/DC switching regulator IC that combines a PFM controller with an integrated 650V high-avalanche-capability intelligent power MOSFET and a built-in high-voltage startup circuit — delivering a complete, ultra-compact offline power supply solution with an extremely low external component count. In the DIP-7 package it delivers up to 3.6W at 230VAC, and up to 3.0W at 230VAC in SOP-7, making it ideal for low-power non-isolated SMPS designs in consumer electronics and smart home devices. A built-in frequency reduction modulation technique improves EMI performance, while integrated OCP, OTP, and UVLO protection functions and ultra-low standby power consumption satisfy modern energy efficiency requirements. ABL Semi supplies the PN8034 as a 100% authentic Chipown product in SOP-7 and DIP-7 packages, with flexible MOQ and pin-to-pin compatibility to TNY and NCP series AC/DC regulators.

The Chipown PN8161 is a high-performance quasi-resonant AC/DC converter IC that integrates a current-mode controller and power MOSFET in a compact SOP-8 package, making it ideal for chargers, adapters, and open-frame switching power supplies. With a built-in 690V high-avalanche-capability MOSFET, a maximum switching frequency of 125kHz, and a wide supply voltage range of 9V to 38V, the PN8161 delivers high efficiency across the full load range while keeping external component count to a minimum — no start-up resistors or CS sense resistors required. Its hybrid QR-PWM / QR-PFM / Burst-mode modulation achieves standby power consumption below 50mW at 230VAC, meeting stringent energy efficiency standards. ABL Semi supplies the PN8161 with flexible MOQ for prototyping and production, fully authenticated from Chipown’s original factory.

The Chipown PN8162 is a highly integrated quasi-resonant AC/DC switching regulator that combines a current-mode controller and a built-in 690V high-avalanche-capability power MOSFET in a thermally efficient PDFN-8 (5×6mm) package, purpose-built for chargers, adapters, and open-frame switching power supplies. Operating across a wide supply voltage range of 9V to 38V with a maximum switching frequency of 125kHz, the PN8162 delivers high conversion efficiency with minimal external components — no start-up resistor or CS sense resistor required. Its hybrid QR-PWM / QR-PFM / Burst-mode modulation scheme achieves standby power consumption below 50mW at 230VAC, while integrated Soft Driver and frequency modulation technologies ensure excellent EMI performance. ABL Semi supplies the PN8162 direct from Chipown’s original factory with flexible MOQ for both prototyping and volume production.

The Chipown PN8328 is a highly integrated primary-side constant-current LED driver IC that combines a high-accuracy CC controller and a built-in 650V high-avalanche-capability power MOSFET in a DIP-8 package, designed for isolated dual-winding LED lighting power supplies with an ultra-minimal external component count. Operating across a universal AC input range of 90VAC to 265VAC, the PN8328 achieves ±3% constant current accuracy while eliminating the optocoupler, TL431, transformer auxiliary winding, and high-voltage start-up resistor through Chipown’s patented fast DMOS self-supply and primary-side regulation technologies. Output current is user-adjustable via the R_s resistor on the CS pin, offering flexible luminous flux targeting without circuit redesign. ABL Semi supplies the PN8328 as 100% authentic Chipown product with flexible MOQ and compliance-ready trade documentation for both prototype and production orders.

The Silergy SY50213W is a primary-side regulated (PSR) flyback AC/DC switching regulator designed for compact, cost-efficient constant current / constant voltage (CC/CV) power supply applications. By integrating an 800V breakdown voltage bipolar NPN transistor directly into a compact SO-8 package, the SY50213W eliminates the need for an opto-isolator and secondary-side feedback circuitry, reducing overall BOM cost and board space. It delivers up to 2.1A output current with a power dissipation of 1.1W, and accepts an input voltage range of 6V to 14V on the control side, with quasi-resonant PWM/PFM operation achieving high average efficiency and low EMI. ABL Semi supplies the SY50213W as a 100% authentic Silergy product with flexible MOQ, suitable as a pin-to-pin alternative to comparable flyback controllers from Power Integrations and onsemi.