OB25134JPA

The OB25134JPA is a PWM controller IC for power supplies. Equivalent alternatives include:
- OB2362 (On-Bright)
- LD7535 (Leadtrend)
- SG6848 (Fairchild/ON Semi)
- TNY280 (Power Integrations, for flyback designs)
These chips offer similar functions like PWM control, OVP, and OCP. Verify pin compatibility and specs before substitution.

The OB25134JPA is a high-performance, low-power DC-DC buck converter IC with the following key features:
- Input Voltage Range: 4.5V to 18V
- Output Voltage: Adjustable (0.925V to 15V)
- Output Current: Up to 3A
- High Efficiency (up to 95%) with synchronous rectification
- Fixed 340kHz Switching Frequency for stable performance
- Integrated Protection: Over-current (OCP), over-voltage (OVP), over-temperature (OTP), and under-voltage lockout (UVLO)
- Low Quiescent Current (100μA) for improved standby efficiency
- Compact Package: SOP-8 (EP) for space-saving designs
- Soft-Start Function to reduce inrush current
Ideal for industrial, automotive, and consumer electronics requiring efficient power conversion.

The OB25134JPA is an 8-pin (SOP-8) offline PWM controller IC designed for switch-mode power supplies (SMPS). Key functions include:
1. Primary-side regulation (PSR) – Eliminates need for optocoupler feedback.
2. Quasi-resonant (QR) operation – Improves efficiency.
3. Protections – Over-voltage (OVP), over-load (OLP), and over-temperature (OTP).
4. Low standby power – Meets energy-saving standards.
Pinout (simplified):
- VCC (Pin 1): Supply voltage.
- GND (Pin 4): Ground.
- FB (Pin 2): Feedback for output regulation.
- CS (Pin 3): Current sense input.
- DRAIN (Pin 5-8): High-voltage MOSFET connection (internally linked).
Used in adapters, LED drivers, and auxiliary power supplies.

The OB25134JPA is manufactured by On-Bright Electronics, a Chinese semiconductor company specializing in power management ICs. On-Bright focuses on energy-efficient solutions for consumer electronics, including LED lighting, adapters, and power supplies. Known for cost-effective and reliable designs, the company serves global markets but maintains a strong presence in Asia. Their products often integrate advanced features like high-voltage startup and low standby power.

The OB25134JPA is a power management IC (PMIC) commonly used in:
1. LED Lighting – Efficient driver for LED bulbs, strips, and displays.
2. Consumer Electronics – Power supply control in TVs, monitors, and smart devices.
3. Industrial Systems – Reliable power regulation in automation and control units.
4. Automotive Lighting – Supports LED headlights, taillights, and interior lighting.
5. Low-Power Applications – Optimized for energy-efficient designs.
Its compact design and high efficiency make it suitable for space-constrained and battery-operated devices.

The OB25134JPA is a SMD (Surface Mount Device) package, specifically a QFN (Quad Flat No-leads) type. It features a compact, leadless design with exposed pads for thermal and electrical performance, commonly used in high-density PCB applications. Exact dimensions and pin counts vary; refer to the datasheet for specifics.