OB2263MP Overview
The On-Bright OB2263MP is a highly integrated current-mode PWM control IC purpose-designed for offline flyback switching power supplies in the sub-30W output range. Targeting cost-sensitive, high-volume applications such as mobile phone chargers, tablet adapters, set-top box power supplies, and consumer electronics adapters, the OB2263MP integrates all the control and protection functions needed for a complete flyback converter into a single compact IC. The switching frequency at normal operation is externally programmable and factory-trimmed to a tight 60kHz–70kHz band, providing consistent converter performance across production units and simplifying EMI filter design. A maximum duty cycle of 75% gives the OB2263MP sufficient control headroom for efficient conversion across a wide input voltage range.
On-Bright’s OB2263MP incorporates several key features that differentiate it from basic PWM controllers in terms of efficiency, EMI, and system cost. At no-load and light-load conditions, the device enters an extended burst mode, dramatically reducing switching frequency and associated switching losses to minimise standby power consumption — a critical requirement for compliance with energy efficiency standards such as EU ErP Lot 6 and US DoE Level VI. The proprietary frequency shuffling technique spreads switching harmonics across a band rather than concentrating them at fixed frequencies, significantly reducing conducted and radiated EMI without additional filter components. Internal slope compensation improves large-signal stability and suppresses sub-harmonic oscillation at high duty cycle, while leading-edge blanking (LEB) on the current sense (CS) input eliminates the need for external RC filtering on the CS pin — reducing component count and PCB complexity.
The OB2263MP provides comprehensive protection with automatic self-recovery: cycle-by-cycle current limiting (OCP), overload protection (OLP), VDD overvoltage clamp, and undervoltage lockout (UVLO) are all integrated. The gate drive output is internally clamped to a maximum of 18V, protecting the external power MOSFET from over-gate-voltage damage across the full VDD operating range of 10V to 30V. Audio noise is eliminated through soft switching control on the totem-pole gate drive output, ensuring tonal energy below 20kHz is minimised. The OB2263MP is available in SOT-23-6, SOP-8, and DIP-8 packages. ABL Semi stocks it as a fully authentic On-Bright factory product with flexible MOQ and compliance documentation for UK and European customers.
Key Specifications
| Parameter | Value |
|---|---|
| Device Type | Current-Mode PWM Controller — Offline Flyback |
| VDD Supply Range | 10V to 30V |
| Switching Frequency (Normal Operation) | 60kHz to 70kHz (externally programmable, factory-trimmed) |
| Maximum Duty Cycle | 75% |
| Control Mode | Current-mode PWM modulation |
| Light / No-Load Operation | Extended burst mode (minimises standby switching loss) |
| EMI Technique | On-Bright proprietary frequency shuffling |
| Slope Compensation | Internal (suppresses sub-harmonic oscillation) |
| Leading-Edge Blanking (CS) | Yes — integrated on current sense input |
| Gate Drive Output Clamp | Maximum 18V |
| Protection Features | OCP (cycle-by-cycle), OLP, VDD OVP clamp, UVLO — all auto-recovery |
| Audio Noise | Eliminated — soft switching gate drive, tonal energy <20kHz minimised |
| Target Application Power Range | Sub-30W offline flyback |
| Package Options | SOT-23-6, SOP-8, DIP-8 |
Applications
The OB2263MP is optimised for cost-effective, high-volume offline flyback power supply designs in the sub-30W range where low standby power, EMI compliance, and minimal external component count are the primary design objectives. Primary application areas include mobile phone and tablet chargers, laptop adapter power stages, set-top box and smart TV auxiliary power supplies, LED lighting drivers, and USB power adapter controllers. The device is equally well-suited to smart home device power supplies, IoT gateway adapters, and small industrial SMPS designs targeting EU ErP, DoE Level VI, or COC Tier 2 energy efficiency compliance requirements.
Pin-to-Pin Compatible Alternatives
The OB2263MP’s SOT-23-6, SOP-8, and DIP-8 packages and current-mode flyback PWM architecture are compatible with widely deployed offline PWM controllers from established Western suppliers, enabling engineers to adopt the OB2263MP as a cost-competitive direct replacement without PCB or circuit redesign.
| Reference Part Number | Original Manufacturer | Why Choose OB2263MP |
|---|---|---|
| UC3842BDR2G | onsemi | Classic current-mode PWM controller in SOP-8 and DIP-8; OB2263MP provides a modern, higher-integration replacement with burst mode standby, LEB, frequency shuffling EMI, and full auto-recovery protection not present in the UC3842 |
| NCP1014AP065G | onsemi | Integrated flyback controller in DIP-7; OB2263MP offers equivalent offline flyback control in SOP-8 and SOT-23-6 with proprietary EMI shuffling and extended burst mode for improved standby efficiency compliance |
| TNY268PG | Power Integrations | EcoSmart integrated switcher in DIP-8; OB2263MP provides an externally flexible current-mode PWM alternative with separate power MOSFET selection, frequency programmability, and 18V gate clamp protection |
| STR-W6765 | Sanken Electric | Integrated quasi-resonant flyback controller; OB2263MP offers a discrete-MOSFET compatible alternative with programmable frequency, internal slope compensation, and proprietary burst mode in a smaller SOT-23-6 or SOP-8 package |
| FAN6300H | onsemi (Fairchild) | Green-mode current-mode PWM controller in SOP-8; OB2263MP provides a pin-compatible alternative with On-Bright’s frequency shuffling EMI technique and auto-recovery protection suite at a more competitive unit cost |
Frequently Asked Questions
Is OB2263MP RoHS compliant?
Yes. The OB2263MP is fully RoHS compliant. On-Bright manufactures the OB2263MP in accordance with EU RoHS Directive 2011/65/EU, ensuring the device is free from restricted hazardous substances including lead and mercury. ABL Semi can provide full compliance and trade documentation upon request to support UK and European regulatory and procurement requirements.
What are the pin-to-pin replacements for OB2263MP?
The OB2263MP is a functional and footprint-compatible alternative to several widely deployed current-mode PWM flyback controllers, including the onsemi UC3842B, onsemi NCP1014, onsemi FAN6300H, Power Integrations TNY268, and Sanken STR-W6765 — offering equivalent or superior integration in SOP-8, DIP-8, and SOT-23-6 packages. Refer to the compatibility table above for a detailed comparison.
What is the minimum order quantity (MOQ) for OB2263MP?
ABL Semi offers flexible MOQ for OB2263MP, supporting both prototype quantities and mass production orders. Contact us for current stock and pricing.
What package options are available for OB2263MP?
The OB2263MP is available in three package options: SOT-23-6 (compact 6-pin SMD, suited to space-constrained charger and adapter PCBs), SOP-8 (standard 8-pin small outline SMD, compatible with UC3842 and FAN6300 footprints), and DIP-8 (8-pin through-hole, suited to prototype, repair, and legacy production designs). All three packages are supported by On-Bright and stocked by ABL Semi — contact us to confirm availability for your preferred package variant.
How does the OB2263MP achieve low standby power, and what energy efficiency standards does it support?
The OB2263MP achieves low standby power through two complementary mechanisms. First, at no-load and light-load conditions, the controller enters extended burst mode — suspending switching entirely during idle periods and restarting only when the output voltage falls below a threshold, dramatically reducing switching frequency and associated losses. Second, the low VDD startup current and low operating current allow a high-value startup resistor to be used in the supply circuit, minimising the resistive power loss in the startup network that contributes significantly to no-load power in conventional designs. Together, these features support compliance with EU ErP Lot 6 (no-load power <0.1W for chargers <51W), US DoE Level VI, and CoC Tier 2 standby power limits — making the OB2263MP a strong platform choice for energy-label-compliant consumer power supply designs.
For complete product specifications, please refer to: