In the context of increasingly stringent energy efficiency requirements for displays, server power supplies and high-end AC/DC devices, the CXSU63307 critical conduction mode active power factor correction (PFC) controller has become an ideal solution for the design of small and medium power switching power supplies due to its ultra-low harmonic distortion and multiple intelligent protection features.
-
[ CXSU63307 ]"
CXSU63307: Innovation of high efficiency PFC controller for small and medium power supply
In the context of increasingly stringent energy efficiency requirements for monitors, server power supplies, and high-end AC/DC devices,CXSU63307 critical conduction mode active power factor correction (PFC) controllerWith its ultra-low harmonic distortion and multiple intelligent protection features, it is an ideal solution for small and medium power switching power supply design.
1. Core Advantage: Redefining Power Efficiency Standards
1. Harmonic optimization core technology
Built-in original harmonic optimization multiplier, through the special structure design of the AC input current harmonic distortion to a very low level. Power factor over wide input voltage (90V-265V AC) and dynamic load rangeInfinitely close to 1far beyond the traditional PFC scheme.
2. Energy efficiency breakthrough design
a. Low starting current50μA(VCC = 11V), support high resistance start resistance, reduce standby loss
B. Working current only2.3mA(typical), significantly reducing the power supply capacitor capacity
c. Critical conduction mode (CrM) architecture to optimize energy efficiency in small and medium power scenarios
3. Six-fold protection system
| Type of protection | trigger mechanism | response speed |
|---|---|---|
| Dynamic Overvoltage (DYN OVP) | COMP current> 32μA step down power | microsecond level |
| Static Overvoltage (STAT OVP) | COMP voltage <2.3V shutdown output | nanosecond level |
| Output Open Loop | INV<0.2V OFF/>0.45V RECOVERY | Cycle level |
| VCC Undervoltage Lockout | 9.7V ON/12.5V OFF | Hardware level |
| drive clamp | 18V Gate Voltage Clamp | instantaneous trigger |
| Cycle-by-cycle current limiting | Peak current = 1.08V/Rs | Each switching cycle |
Analysis of 2. Intelligent Control Mechanism
1. Accurate current tracking
Real-time monitoring of the zero-crossing of the inductor current through the ZCD pin (trigger threshold: falling edge 0.7V/rising edge 1.4V), combined with the multiplier output:
(V) -2.5 (V) // K = 0.38 typical)
The MOSFET turn-on timing is dynamically modulated so that the input current perfectly tracks the voltage waveform.
A. leading edge blanking (LEB) technology: 200ns masking period to eliminate false triggering of switch spikes
B. ZCD dual voltage clamp: 5.7V high clamp/0V low clamp, resistant to ± 10kV surge interference
c. Current detection anti-offset: CS pin ± 34mV automatic compensation
3. key electrical characteristics (25 ℃/VCC = 15V)
| Module | Parameters | Minimum | Typical value | Maximum |
|---|---|---|---|---|
| error amplifier | Reference voltage accuracy | 2.46V | 2.5V | 2.54V |
| gain-bandwidth product | - | 1MHz | - | |
| Gate Drive | Peak pull/sink current | - | 800mA | - |
| Rise time (1nF load) | 60ns | - | 110ns | |
| Temperature Adaptability | UVLO threshold (-45~125 ℃) | ±3% | - | ±5% |
4. typical application scenarios
1. LCD TV/monitor power supply:Ensure backlight drive voltage stability with its ± 1.5% reference accuracy
2. Server redundant power supply:Dynamic OVP function effectively suppresses hot-swap voltage surge
3.LED high-end driverCrM mode natural matching LED dimming requirements, with ZCD detection to achieve no stroboscopic
Design attention: CS sampling resistor should be close to the chip (<5mm) during layout, COMP pin compensation network adopts RC series structure (recommended value: R = 10kΩ C = 10nF), and bandwidth should be controlled below 20Hz to optimize PF value.
5. packaging and reliability
ProvideSOP-8(4.8 × 3.8mm) andDIP-8(9.4 x 6.35mm) Dual options, support -65°C to 150°C storage temperature. Through 300 ℃(10s) reflow soldering certification, in line with industrial equipment reliability requirements.
Conclusion
Through the cooperation of THD optimization architecture and intelligent protection mechanism, the CXSU63307 solves the balance problem of harmonic distortion and system reliability of small and medium power supply. Its 3mA ultra-low operating current feature provides chip-level support for the next generation of energy-saving equipment in line with DoE VI-level energy efficiency, helping power supply design to break through the 90% + energy efficiency bottleneck.
Technical Specification (Product PDF):If you need detailed PDF specifications, please scan WeChat and contact us. You can also get free samples and technical support.!
Related Chip Selection GuideMore similar products......
| PFC control chip | ||||||||||
| Model | VCC starting voltage | VCC Shutdown Voltage | Starting current | Quiescent current | Voltage accuracy | Switching frequency | MOS transistor drive current | Encapsulation | Features | |
| CXSU63307 | 12.5 | 9.7 | 50uA | 2.3mA | 1% | FM | 800mA | SOP8/DIP8 | Boost synchronous rectifier DCDC power chipcritical conduction modePFC Controller | |
| CXSU63306 | 10.5 | 9.5 | 17uA | 2m | 1.5% | 65KHz | 1.5A | SOP8 | Continuous Conduction Mode PFC Controller | |
| High Power AC-DC High Power AC-DC Quasi-Resonant Primary Side Control Constant Current Constant Voltage LLC Forward Flyback Power Supply | ||||||||||
| Model | VCC starting voltage | VCC Shutdown Voltage | Starting current | Quiescent current | Switching frequency | MOS transistor drive current | Encapsulation | Features | ||
| CXAC85202 | 8V | - | - | 17mA | Peripheral can be set | 500mA | SOP16/DIP16 | Current Mode Push-Pull Half-Bridge PWM Control High Power AC-DC Quasi-Resonant Primary Side Control Constant Current Constant Voltage LLC Forward Flyback Power Supply | ||
| CXAC85199 | 7V | - | - | 6mA | Peripheral can be set | 200mA | SOP16/DIP16 | Push-pull half-bridge PWM control high-power AC-DC quasi-resonant primary-side control constant current constant voltage LLC forward-flyback power supply | ||
| CXAC85197S | 8V | - | - | 14mA | Peripheral can be set | 500mA | SOP16/DIP16 | Push-pull half-bridge PWM control high-power AC-DC quasi-resonant primary-side control constant current constant voltage LLC forward-flyback power supply | ||
| CXAC85255 | 16V | 8V | 200uA | 2mA | Peripheral capacitance can be set | 2A | SOP16 | 600V half-bridge drive PWM controller high power AC-DC quasi-resonant primary side control constant current constant voltage LLC forward and back power supply | ||
| CXAC85255S | 8.5V | 7.5V | 200uA | 2mA | Peripheral capacitance can be set | 2A | SOP16 | Integrated 600V Half-bridge Drive PWM Controller High Power AC-DC Quasi-resonant Primary Side Control Constant Current Constant Voltage LLC Forward Flyback Power Supply | ||
| CXAC85256 | 16.5V | 8V | 200uA | 2mA | Peripheral capacitance can be set | 2A | SOP16 | Integrated 600V half-bridge driveDual-Tube Forward Power SupplyChip High Power AC-DC Quasi-Resonant Primary Side Control Constant Current Constant Voltage LLC Forward Flyback Power Supply | ||
| CXAC85257 | 10.5V | 7.9V | 200uA | 2mA | FM | 0.3A/0.8A | SOP16 | Integrated 650V half-bridge drive LLC controller high power AC-DC quasi-resonant primary side control constant current constant voltage LLC forward and back power supply | ||
| CXAC85258 | 10.5V | 9V | 180uA | 2.5mA | FM | 0.8A/1.3A | SOP16 | Integrated 650V half-bridge drive LLC controller high power AC-DCAC-DC quasi-resonant primary side control constant current constant voltage LLC forward and back power supply | ||
| CXAC85259 | 14V | 9V | 18uA | 2.3mA | Peripheral jitter can be set | 0.8A/1.3A | SOP16 | Integration600VHalf-bridge drive forward and flyback control chip high powerAC-DCquasi-resonancePrimary side control constant current constant voltageLLCForward and flyback power supply | ||
| Medium Power AC-DC Forward and Flyback Power Supply Medium Power AC-DC | ||||||||||
| Model | VCC starting voltage | VCC Shutdown Voltage | Starting current | Quiescent current | Switching frequency | Output voltage accuracy | Built-in power tube | Output power | Encapsulation form | Features |
| CXAC85194 | 12V | 6.5V | 3uA | 0.8mA | FM | 4% | Built-in 710V power transistor | 10W | SOP7 | Primary side feedback constant voltage constant current small power AC-DC forward and back power supply |
| CXAC85254L | 9.7V | 7.8V | 6uA | 2.3mA | Peripheral jitter can be set | - | None | Medium power | SOP8/DIP8 | Power AC-DC Forward Flyback Power Supply in Current Mode PWM |
| CXAC85254E | 14V | 9.5V | 18uA | 2.3mA | Peripheral jitter can be set | - | None | Medium power | SOP8/DIP8 | Power AC-DC Forward Flyback Power Supply in Current Mode PWM |
| CXAC85254 | 16V | 10.5V | 6uA | 2.3mA | Peripheral jitter can be set | - | None | Medium power | SOP8/DIP8 | Power AC-DC Forward Flyback Power Supply in Current Mode PWM |
| CXAC85260 | 16V | 10.5V | 6uA | 2.3mA | Peripheral jitter can be set | - | None | Medium power | SOP8/DIP8 | Power AC-DC Forward Flyback Power Supply in Current Mode PWM |
| CXAC85261 | 16V | 10.5V | 6uA | 2.3mA | Peripheral jitter can be set | - | None | Medium power | SOP8/DIP8 | Power AC-DC Forward Flyback Power Supply in Current Mode PWM |
| CXAC85262 | 14V | 9V | 18uA | 2.3mA | Peripheral jitter can be set | - | None | Medium power | SOP8 | Power AC-DC Forward Flyback Power Supply in Current Mode PWM |
| CXAC85263 | 14V | 9V | 18uA | 2.3mA | Peripheral jitter can be set | - | None | Medium power | SOP16 | Integrated 600V Half-Bridge Drive Current Mode PWM Medium Power AC-DC Forward Flyback Power Supply |
| CXAC85264 | 16V | 10.5V | 6uA | 2.3mA | Peripheral jitter can be set | - | None | Medium power | SOP8/DIP8 | Power AC-DC Forward Flyback Power Supply in Current Mode PWM |
| CXAC85265 | 16V | 10.5V | 6uA | 3mA | Peripheral jitter can be set | - | None | Medium power | SOP8/DIP8 | Power AC-DC Flyback Power Supply in Current Mode PWM |
| CXAC85266 | 16V | 10.3V | 6uA | 3mA | Peripheral jitter can be set | - | None | Medium power | SOP8/DIP8 | Power AC-DC Flyback Power Supply in Current Mode PWM |
| Digital power half-bridge charger scheme dedicated chip | ||||||||||
| Model | Drive | Operating frequency | algorithm | Charging management and protection function | Battery | Adjustment mode | Encapsulation | Features | ||
| CXAC85267 | Integrated 2-way drive drive capability ± 2A | 50K | 3p3z Constant Voltage and Constant Current Double Loop Algorithm | Lead acid and lithium battery | PC debugging assistant | LQFP64 | Digital power half-bridge charger scheme dedicated chip Ø * Multi-stage charging strategy Ø * Output voltage current soft start Ø * LED indicator Ø * Battery detection and anti-reverse connection protection Ø * InputDCBus overvoltage and undervoltage protection Ø * Fan and relay control Ø *over-temperature protectionwithtemperature compensation Ø * Output overload,Short circuit protection |
|||
