規格
| 屬性 | 價值 |
| Supplier | Texas Instruments |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Part Status | Active |
| Output Type | Transistor Driver |
| Function | Step-Up, Step-Up/Step-Down |
| Output Configuration | Positive |
| Topology | Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull |
| Number of Outputs | 2 |
| Output Phases | 1 |
| Voltage - Supply (Vcc/Vdd) | 8.4V ~ 22V |
| Frequency - Switching | 400kHz ~ 1MHz |
| Duty Cycle(Max) | 85% |
| Synchronous Rectifier | No |
| Clock Sync | No |
| Control Features | Current Limit, Frequency Control, Ramp, Soft Start |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount |
概述
Description
UC2825AQDWREP is a fixed‑frequency, current‑mode PWM controller IC from TI (Unitrode lineage) used to regulate switch‑mode power supplies. It combines the PWM comparator, error amplifier, oscillator, and a MOSFET gate‑drive interface in one package, simplifying SMPS design for both isolated and non‑isolated topologies (flyback, buck, boost, etc.).
Key features (typical):
- Current‑mode control with built‑in peak current limit
- Internal or external PWM reference for output regulation
- Oscillator with frequency set by external RT/CT components
- Undervoltage lockout and soft‑start to reduce inrush and overshoot
- Protection options such as overcurrent/short‑circuit protection
Applications: commonly used in offline and DC‑DC converters, including flyback and forward converters for adapters and power supplies.
Suffix notes: the “AQDWREP” part code indicates a specific package/production option (and possibly a temperature/grade or tape‑and‑reel packaging). For exact electrical specs, pinout, and recommended circuitry, refer to the TI UC2825A data sheet for the AQDWREP variant.
Key features (typical):
- Current‑mode control with built‑in peak current limit
- Internal or external PWM reference for output regulation
- Oscillator with frequency set by external RT/CT components
- Undervoltage lockout and soft‑start to reduce inrush and overshoot
- Protection options such as overcurrent/short‑circuit protection
Applications: commonly used in offline and DC‑DC converters, including flyback and forward converters for adapters and power supplies.
Suffix notes: the “AQDWREP” part code indicates a specific package/production option (and possibly a temperature/grade or tape‑and‑reel packaging). For exact electrical specs, pinout, and recommended circuitry, refer to the TI UC2825A data sheet for the AQDWREP variant.
Features
UC2825AQDWREP is a fixed‑frequency, current‑mode PWM controller for SMPS (flyback/forward, buck/boost). Key features include:
- External RT/CT for oscillator frequency setting; fixed-frequency operation
- Wide input range with undervoltage lockout (UVLO) and hysteresis
- Internal 5V reference and transconductance error amplifier with external compensation network
- Cycle‑by‑cycle peak current limiting
- Soft‑start to limit inrush and improve startup behavior
- Overload/short‑circuit protection and thermal shutdown
- Fault protection with latch/reset behavior
- Gate‑drive output for external switching device (MOSFET/IGBT)
- Suitable for isolated/non‑isolated topologies; 8‑pin package (AQDWREP)
Note: Always verify exact electrical specs from the official datasheet for your specific lot/version.
- External RT/CT for oscillator frequency setting; fixed-frequency operation
- Wide input range with undervoltage lockout (UVLO) and hysteresis
- Internal 5V reference and transconductance error amplifier with external compensation network
- Cycle‑by‑cycle peak current limiting
- Soft‑start to limit inrush and improve startup behavior
- Overload/short‑circuit protection and thermal shutdown
- Fault protection with latch/reset behavior
- Gate‑drive output for external switching device (MOSFET/IGBT)
- Suitable for isolated/non‑isolated topologies; 8‑pin package (AQDWREP)
Note: Always verify exact electrical specs from the official datasheet for your specific lot/version.
Pinout
- Pin count: 8 pins (DIP-8/SOIC-8).
- Function: A current‑mode PWM controller for switch‑mode power supplies. It provides a 5V reference, inputs for feedback (FB) and current sense (IS), compensation (COMP), timing (RT/CT), an output driver to drive the external switch, plus Vcc and Gnd.
- Function: A current‑mode PWM controller for switch‑mode power supplies. It provides a 5V reference, inputs for feedback (FB) and current sense (IS), compensation (COMP), timing (RT/CT), an output driver to drive the external switch, plus Vcc and Gnd.
Manufacturer
- Manufacturer: Texas Instruments (TI).
- What kind of company: A large American multinational semiconductor company that designs and manufactures analog, mixed-signal, and embedded processing ICs (they acquired Unitrode, the original UC-series maker).
- What kind of company: A large American multinational semiconductor company that designs and manufactures analog, mixed-signal, and embedded processing ICs (they acquired Unitrode, the original UC-series maker).
Application
UC2825AQDWREP is a fixed-frequency, current-mode PWM controller for off-line switch‑mode power supplies. Typical applications include:
- Flyback and forward converters for isolated outputs
- Isolated and non‑isolated DC‑DC supplies in consumer electronics
- AC adapters/wall‑warts, set‑top boxes, televisions/monitors, printers
- Battery chargers and telecom/industrial power supplies
It drives an external MOSFET and provides protections (UVLO, overload/short‑circuit, soft start) suitable for low‑ to mid‑power SMPS.
- Flyback and forward converters for isolated outputs
- Isolated and non‑isolated DC‑DC supplies in consumer electronics
- AC adapters/wall‑warts, set‑top boxes, televisions/monitors, printers
- Battery chargers and telecom/industrial power supplies
It drives an external MOSFET and provides protections (UVLO, overload/short‑circuit, soft start) suitable for low‑ to mid‑power SMPS.
Package
UC2825AQDWREP is an 8-pin package, specifically a Small Outline IC (SOIC) variant (DWR). The trailing REP indicates Tape & Reel packaging.
