LD7576GS LD7576PS ld7576 LCD Power Supply Chip SMD SOP-8

Description

LD7576GS LD7576PS ld7576 LCD Power Supply Chip SMD SOP-8

The LD7576 series (including LD7576GS and LD7576PS) is a high-performance, green-mode PWM controller IC integrated with a high-voltage startup circuit.  it is widely used as a power supply management chip in LCD monitors, TVs, switching AC/DC adapters, and battery chargers. The “GS” and “PS” suffixes specify variant sub-types, though both utilize the standard SOP-8 surface-mount (SMD) package format for compact PCB design.

• High-Voltage Startup Circuit: Features an integrated 500V startup circuit that draws current directly from the bulk capacitor, providing a near-lossless power startup. 
• Green-Mode Control: Features non-audible-noise green-mode operation to maximize power savings during standby or light-load conditions.
• Circuit Protections: Includes built-in Over-Voltage Protection (OVP) on VCC, Over-Load Protection (OLP) with an adjustable delay time via the CT pin, and on-chip Over-Temperature Protection (OTP).
• Current Sensing: Implements Leading-Edge Blanking (LEB) on the CS pin and internal slope compensation to ensure precise current mode control without false triggers. 
• Driving Capability: Outfitted with a 500mA gate driving capability to efficiently switch external power MOSFETs.

1. GND: Signal ground
2. CT: Programmable over-load protection delay time adjustment via external capacitor
3. COMP: Feedback compensation pin, typically connected to an optocoupler
4. CS: Current sense input pin for peak current limits and LEB
5. OUT: Totem-pole gate driver output to control the external power MOSFET
6. VCC: Supply voltage input pin
7. NC: No internal connection
8. HV: High-voltage startup pin connected to the line or bulk rectified line