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CXAC85265: High-Performance current mode PWM Controller DetailsE2I嘉泰姆

In the design of small and medium power flyback power supply,CXAC85265 current mode PWM controllerWith its high cost performance and excellent performance, it is an ideal choice. The chip integrates multiple protection mechanisms, supports green energy saving mode, and is widely used in lithium battery charger, lead-acid battery charger, LED screen power supply, adapter and other fields.E2I嘉泰姆

Core features and advantages

1. Efficient and energy-saving designE2I嘉泰姆

a. The starting current is as low6. A, work current only3mA, significantly reduce standby power consumption.E2I嘉泰姆

B. SupportGreen ModeAndBurp Mode, optimize energy efficiency by reducing switching frequency when light load/no load.E2I嘉泰姆

2. Complete protection functionE2I嘉泰姆

a, multiple circuit protection: VCC undervoltage protection (UVLO), overvoltage protection (VOP), cycle-By-Cycle current limit, overload protection, and soft start.E2I嘉泰姆

B. External NTC temperature protection: connect thermistor through RT pin to trigger threshold1v, recovery threshold1.1V.E2I嘉泰姆

c. Output clamp voltage (18V): prevents power breakdown of MOS tube due to high VCC.E2I嘉泰姆

3. Flexible adjustable parametersE2I嘉泰姆

a. Frequency programmable: set the PWM frequency through an external RI resistor (formula:Fosc(kHz)=1485/RI(kΩ)), range48-63kHz.E2I嘉泰姆

B. Maximum duty cycle 80%: Optimize Power transmission efficiency.E2I嘉泰姆

c. Built-in TikTok function: ± 4% frequency jitter range, greatly improving EMI characteristics.E2I嘉泰姆

Pin function analysis

Design attention: pin 2(nc) is suspended design, and interference should be reduced during layout.E2I嘉泰姆

Typical application scenarios

1. Lithium battery/lead-acid battery charger: Supports Constant voltage and constant current (CC/CV) control, and uses CXLB73136 to realize three-stage charging management.E2I嘉泰姆

2. Adapter and LED screen power supply: few peripheral devices, built-in slope compensation, simplify circuit design.E2I嘉泰姆

3. Motor drive power supply: strong anti-interference ability, support-45 ℃ to 125 ℃ industrial temperature range.E2I嘉泰姆

Electrical characteristic highlights

1.VCC withstand voltage range:-0.3V to 30V(Overvoltage protection28.2V/Restore27V).E2I嘉泰姆

2. Fast dynamic response: The over-current detection delay is only120ns, overload protection delay55ms.E2I嘉泰姆

3. Driving capability: output clamp18V, source/irrigation current20mA(Low voltage output0.3V).E2I嘉泰姆

Encapsulation and reliability

ProvideSOP8AndDIP8Dual package option, key dimensions:E2I嘉泰姆

1.SOP8: pad spacing1.27mm(BSC), body size4.7 × 6.2mm.E2I嘉泰姆

2.DIP8: pin spacing2.54mm, compatible with standard PCB process.E2I嘉泰姆

The welding temperature should be ≤ 300℃ (within 10s) to ensure chip reliability.E2I嘉泰姆

SummaryE2I嘉泰姆
CXAC85265Streamlined periphery, excellent energy efficiency, and comprehensive protectionThe three advantages have become the first choice for the design of small and medium power supply. Its unique frequency jitter technology, green energy saving mode and multi-scenario applicability can significantly improve system stability and energy efficiency ratio, and meet increasingly stringent environmental protection standards and cost control requirements.E2I嘉泰姆

Extended application: explore its combination with CXLB73136 to quickly develop intelligent charging equipment and industrial power modules.E2I嘉泰姆

For detailed PDF specifications, please scan WeChat and contact us. You can also get free samples and technical support.!E2I嘉泰姆
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   Product packaging diagramE2I嘉泰姆

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   Circuit Schematic diagramE2I嘉泰姆

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