General Description
The LD7532A is specifically designed for low cost total-system by integrating many functions, protections, and EMI-improved solution in a SOT-26 package which usually need a lot of extra components or circuits on general system designs.
Furthermore, the CT pin latch function by injecting a high above 3.1V provides power circuit designers an easy way to deal with designs for protections, such as OVP and OTP, minimizing component cost and development time.
In order to satisfy different designs, the OVP trig level is adjustable by users adding a Zener diode from VCC pin to CT pin.
Features
• High-Voltage CMOS Process with ESD protection
• Very Low Startup Current (<20μA)
• Current Mode Control
• Non-audible-noise Green Mode Control
• UVLO (Under Voltage Lockout) on VCC Pin
• LEB (Leading-Edge Blanking) on CS Pin
• Programmable OLP Delay Time
• Internal Slope Compensation
• External OVP Latch-off Protection
• OLP (Over Load Protection) Auto-recovery Mode
• External OTP Latch-off Protection
• 300mA Driving Capability
Applications
• Switching AC/DC Adaptor and Battery Charger
• Open Frame Switching Power Supply
Typical Application
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