圖片僅供參考
規格
| 屬性 | 價值 |
| Manufacturer | OB(On-Bright Elec) |
| Package / Case | SOT-23-6 |
概述
Description
The OB2273MP is an integrated PWM controller IC designed for offline switch-mode power supplies (SMPS). It features high efficiency, low standby power, and robust protection functions like over-voltage (OVP), over-load (OLP), and over-temperature (OTP) protection.
Key characteristics:
- Primary-side regulation (PSR): Eliminates the need for an optocoupler, reducing cost and complexity.
- Quasi-resonant (QR) operation: Enhances efficiency by reducing switching losses.
- Wide input voltage range: Suitable for universal AC input (85–265VAC).
- Low startup current (~3μA): Improves standby power performance.
Commonly used in adapters, LED drivers, and auxiliary power supplies, the OB2273MP offers a compact, reliable solution with minimal external components. Its fixed 65kHz switching frequency ensures stable performance while minimizing EMI.
For detailed specifications, refer to the datasheet from On-Bright Electronics.
Key characteristics:
- Primary-side regulation (PSR): Eliminates the need for an optocoupler, reducing cost and complexity.
- Quasi-resonant (QR) operation: Enhances efficiency by reducing switching losses.
- Wide input voltage range: Suitable for universal AC input (85–265VAC).
- Low startup current (~3μA): Improves standby power performance.
Commonly used in adapters, LED drivers, and auxiliary power supplies, the OB2273MP offers a compact, reliable solution with minimal external components. Its fixed 65kHz switching frequency ensures stable performance while minimizing EMI.
For detailed specifications, refer to the datasheet from On-Bright Electronics.
Equivalent
The OB2273MP is a PWM controller for power supplies. Equivalent alternatives include:
- SD6832
- LD7535
- TNY278PN
- VIPer12A
- FSDM311
These chips offer similar functionality in SMPS designs, though pinouts and specs may vary slightly. Always verify datasheets for compatibility.
- SD6832
- LD7535
- TNY278PN
- VIPer12A
- FSDM311
These chips offer similar functionality in SMPS designs, though pinouts and specs may vary slightly. Always verify datasheets for compatibility.
Pinout
The OB2273MP is an 8-pin (DIP-8) PWM controller IC for offline flyback converters. Key functions per pin:
1. VCC: Power supply input.
2. GND: Ground reference.
3. FB: Feedback input for output voltage regulation.
4. CS: Current sense input for overcurrent protection.
5. GATE: PWM output to drive the power MOSFET.
6. NC: No connection (reserved).
7. HV: High-voltage startup and supply.
8. DEM: Demagnetization detection (auxiliary winding input).
It features built-in protections (overvoltage, overload, short-circuit) and operates in quasi-resonant mode for efficiency.
1. VCC: Power supply input.
2. GND: Ground reference.
3. FB: Feedback input for output voltage regulation.
4. CS: Current sense input for overcurrent protection.
5. GATE: PWM output to drive the power MOSFET.
6. NC: No connection (reserved).
7. HV: High-voltage startup and supply.
8. DEM: Demagnetization detection (auxiliary winding input).
It features built-in protections (overvoltage, overload, short-circuit) and operates in quasi-resonant mode for efficiency.
Manufacturer
The OB2273MP is a PWM controller IC manufactured by On-Bright Electronics, a semiconductor company specializing in power management solutions.
On-Bright (founded in 1998, headquartered in Shanghai, China) designs and produces high-performance analog and mixed-signal ICs, particularly for AC/DC power conversion in consumer electronics, LED lighting, and adapters. The company is known for its cost-effective, energy-efficient solutions and holds numerous patents in power management technology.
The OB2273MP is commonly used in offline switch-mode power supplies (SMPS), offering features like low standby power and high reliability. On-Bright serves global markets, supplying major electronics manufacturers.
On-Bright (founded in 1998, headquartered in Shanghai, China) designs and produces high-performance analog and mixed-signal ICs, particularly for AC/DC power conversion in consumer electronics, LED lighting, and adapters. The company is known for its cost-effective, energy-efficient solutions and holds numerous patents in power management technology.
The OB2273MP is commonly used in offline switch-mode power supplies (SMPS), offering features like low standby power and high reliability. On-Bright serves global markets, supplying major electronics manufacturers.
Application
The OB2273MP is a PWM controller IC primarily used in power supply applications. Key areas include:
1. AC/DC Adapters – For consumer electronics like chargers.
2. LED Drivers – Efficient power management for LED lighting.
3. Auxiliary Power Supplies – In appliances and industrial systems.
4. Open-Frame Power Supplies – For TVs, monitors, and networking devices.
It features high efficiency, low standby power, and protection functions (e.g., OVP, OCP), making it suitable for compact, energy-efficient designs.
1. AC/DC Adapters – For consumer electronics like chargers.
2. LED Drivers – Efficient power management for LED lighting.
3. Auxiliary Power Supplies – In appliances and industrial systems.
4. Open-Frame Power Supplies – For TVs, monitors, and networking devices.
It features high efficiency, low standby power, and protection functions (e.g., OVP, OCP), making it suitable for compact, energy-efficient designs.
Package
The OB2273MP is a power management IC typically available in a DIP-8 (Dual In-line Package, 8-pin) or SOP-8 (Small Outline Package, 8-pin) package. These packages are compact and suitable for offline flyback converters. The exact type may vary by manufacturer, so always check the datasheet for confirmation.
