(China (Mainland))
Product Summary
The LD7552BS is a low cost, low startup current, current mode PWM controller with green-mode power-saving operation. The integrated functions such as the leading-edge blanking of the current sensing, internal slope compensation and the small package provide the users a high efficiency, minimum external component counts, and low cost solution for AC/DC power applications. The applications of the LD7552BS include Switching AC/DC Adaptor and Battery Charger, Open Frame Switching Power Supply, 384X Replacement.
Parametrics
LD7552BS absolute maximum ratings: (1)Supply Voltage VCC: 36V; (2)COMP, RT, CS: -0.3 to 7V; (3)Operating Junction Temperature: 150℃; (4)Storage Temperature Range: -65 C to 150℃; (5)Package thermal resistance (DIP-8): 100℃/W; (6)Package thermal resistance (SOP-8): 160℃/W; (7)Lead temperature (LD7552IS & LD7552IN, Soldering, 10sec): 230℃; (8)Lead temperature (LD7552BS & LD7552BN, Soldering, 10sec): 260℃.
Features
LD7552BS features: (1)High-Voltage CMOS Process with Excellent ESD; (2)Protection; (3)Very Low Startup Current (Typical 5 A); (4)Under Voltage Lockout (UVLO); (5)Current Mode Control with Cycle-by-Cycle Peak; (6)Current Limiting; (7)Leading-Edge Blanking on CS Pin; (8)Programmable Switching Frequency; (9)Internal Slope Compensation; (10)Proprietary Green-Mode Control for Power Saving; (11)Non-audible-noise Green Mode Control; (12)500mA Driving Capability.
Diagrams
