CXAC85266: breakthrough solution for high-power noise-free PWM controller
CXAC85266 current mode PWM controller, designed for medium and high power flyback power supply below 60W, realizes noise-free operation through cutting-edge blanking, oblique wave compensation and other innovative technologies, and the standby power consumption is less than 75MW, becoming a charger, ideal choice for Adapter and motor drive power supply.
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[ CXAC85266 ]"
CXAC85266: breakthrough solution for high-power noise-free PWM controller
Designed for medium and high power flyback power supply below 60WCXAC85266 current mode PWM controller, realize noise-free operation through innovative technologies such as cutting-edge blanking and oblique wave compensation, and the standby power consumption is less than 75MW, making it an ideal choice for charger, adapter and motor drive power supply.
Six core technology advantages
1. Extreme mute and EMI optimization
a. Built-inFrontier blanking circuit(300ns), eliminating the current detection spike noise when MOS tube is turned on
B. ± 4% frequency jitter technology(Jitter cycle 32ms), significantly reducing EMI interference
c. Working frequency60-70kHz(Formula:Fosc(kHz)=1560/RI(kΩ)), support 12-60 Kohm wide range resistance adjustment
2. Breakthrough improvement of energy efficiency
a. Ultra-low power consumption: starting current6. A, work current only3mA
B. Green/hiccup dual mode: light load automatic switching25kHzLow frequency operation, standby power consumption <75MW (60W application)
3. Triple key protection mechanism
a. Precise over-temperature protection: The RT pin is connected to the NTC (80μa constant flow source), and the trigger/recovery threshold is reached.1V/1.1V
B. VDD overvoltage protection: Trigger Point27.8V, recovery point27V(Zener clamp32V)
c. Cycle-By-Cycle current limit: CS pin detection threshold0.88V ± 8%, response latency120ns
4 anti-interference strengthening design
a. Built-in slope compensation: eliminate subharmonic oscillation when the duty cycle is greater than 50%
B. Resistance to voltage mutation: Overload protection delay65MS, FB pin open circuit/short circuit multiple detection
5. Industrial reliability
a. Operating temperature-45 ℃ ~ 125 ℃, support 300 ℃(10s) welding process
B. Driving capability: output rise/fall time110ns/40ns(1nF load)
6. Simplify design
a. Dual encapsulation options:SOP8/DIP8(Compatible with standard SOP 266.66cm-inch: 4.7 × 6.2)
B. Few peripheral devices, Built-in oscillator and equalizing circuit
Analysis of typical application scenarios
| Application Field | Solution advantages |
|---|---|
| Quick Charge adapter | Supports a maximum duty cycle of 80% and reduces ripple noise with cutting-edge blanking technology. |
| Lithium battery charger | FB pin to achieve power limit (threshold 4.6V), overload protection is more reliable |
| Motor drive power supply | -45 ℃ low temperature start, VDD withstand voltage 30V, strong voltage fluctuation resistance |
Design skills:
When the RI resistance is 24 Kohm, the typical frequency is 65kHz (temperature stability ± 2kHz)
RT pin wiring is far away from the heat source to ensure the accuracy of NTC temperature detection.
Performance upgrade with previous generation products
| Parameter | CXAC85266 | CXAC85265 | Improvement effect |
|---|---|---|---|
| Working frequency | 60-70kHz | 48-63kHz | Power density + 15% |
| Temperature detection current | 80% A | 75% A | Sensitivity + 7% |
| Frontier blanking | Built-in 300ns | None | 40dB noise reduction |
| Driving speed | 110ns/40ns | 130ns/50ns | Switching Loss-18% |
Summary
CXAC85266Noise-free operation, industrial reliability, and extreme energy efficiencyThree core advantages: redefine the power supply design standards below 60W. Its innovative cutting-edge blanking technology and enhanced protection mechanism are especially suitable for high-end scenarios such as noise-sensitive fast charging equipment and medical instrument power supply, helping developers easily pass EMC certification and improve system stability.
Extended resources:
With CXLB73136, intelligent charging management can be realized. Visit the official website for reference design kit.
Technical Specification (product PDF)
For detailed PDF specifications, please scan WeChat and contact us. You can also get free samples and technical support.!
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