Shenzhen CXW Technology., Co Ltd
15 years of experience
Overview
The CX7503BX series is a high-performance quasi-resonant, high-precision constant-voltage and constant-current output performance primary-side power supply chip with built-in high-voltage power MOS tubes.
The CX7503BX series provides extremely comprehensive and high-performance intelligent protection functions, including cycle-by-cycle over-current protection, soft start, chip over-temperature protection, output over-voltage protection, VDD under-voltage lockout protection, VDD over-voltage lockout protection.
The CX7503BX series provides accurate constant voltage, constant current (CV/CC) output without optocoupler and secondary control circuitry and loop compensation while maintaining good stability, good output voltage regulation and high average efficiency, as well as less than 75mW standby power consumption.
The CX7503BX seriesbuilt-inoutputlineloss compensationfunction,lineloss compensationcanbeadjusted byadjustingtheFbdividerresistorresistancetoadjustthePWM/PFMmode of operation to minimize the audio energy, no audio noise in the full load.
The CX7503BX series in SOP-8 package provides an excellent design platform for cost-effective flyback switchingpower supply systemswith ultra-lowstandby power consumption,meeting Level 6 and European Energy Efficiency Standard Eur2.0 applications
Features
Built-inhigh-voltage MOSFETpower switching tubes
High efficiency quasi-resonant operation mode multi-mode primary edge control mode
Using raw-side feedback control, the optocoupler and TL431 can be eliminated
Optimized dynamic response
Standby power consumption <75mW
±4% Constant current, ±2% constant voltage accuracy
Adjustable line loss compensation
Built-in line voltage and primary winding inductance compensation
Built-in adaptive current peak adjustment
Output short-circuit load protection
Work without noise
Power-up soft start
Built-in Leading Edge Blanking (LEB) function
Cycle-by-cycle current limit protection (OCP)
Short-circuit protection for output secondary tubes
Under voltage protection (UVLO), over voltage protection (OVP), VDD voltage clamping protection
| Model | Built-in Mos /RdsON(Ω) | Package | Single Voltage (230V) | Full Voltage (90-264V) |
| CX7503BA | 5.0 | SOP-8 | 10W | 7.5W |
| CX7503BB | 4.0 | SOP-8 | 15W | 12W |
| CX7503BC | 2.2 | SOP-8 | 20W | 16.5W |
Applications
Charger
PDA, digital camera, video camera power adapter
Set-top box power supply
Open Frame Switching Power Supply
Auxiliary power supply for personal computers
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Overview
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