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产品信息
AC-DC 10W-70W绿色模式PWM SOP8和DIP8封装,特色是可高达500VDC直接启动,以降低启动电路的损耗,因而待机功耗更低,可做到0.15W,
LD7552/LD7575/LD7576=SG5841/SG6841/SG6842=OB2268/OB2269=NCP1200/NCP1203/NCP1207
Green-Mode PWM Controller with High-Voltage
Start-Up Circuit and Adjustable OLP Delay Time
REV. 03
General Description
The LD7576X series bring high performance, combines with
highly integrated functions, protections and EMI-improve
solution. It’s an ideal solution for those cost-sensitive system,
reducing component count and overall system cost.
The LD7576X series features near-lossless high voltage
startup circuit, green-mode power-saving operation,
leading-edge blanking of the current sensing and internal
slope compensation. They also consist with more
protections of OLP (Over Load Protection), OVP (Over
Voltage Protection) and OTP (Over Temperature Protection)
to prevent the circuit damage under abnormal conditions.
The LD7576X series are available in DIP-8 and SOP-8
package.
Features
High-Voltage (500V) Startup Circuit
Current Mode Control
Non-Audible-Noise Green Mode Control
UVLO (Under Voltage Lockout)
LEB (Leading-Edge Blanking) on CS Pin
Internal Slope Compensation
OVP (Over Voltage Protection) on Vcc
On-Chip OTP (Over Temperature Protection)
OLP (Over Load Protection)
Latch Mode Protection by CT pin
500mA Driving Capability
Adjustable OLP delay time
Applications
Switching AC/DC Adaptor and Battery Charger
Open Frame Switching Power Supply
LCD Monitor/TV Power
Note:
1. Oscillating frequency:
LD7576/76H: 65KHz (typ.),
LD7576J/76K: 100KHz (typ.).
2. LD7576H/76K features Built-in latch-mode function of OVP on Vcc pin , OLP and On Chip OTP.
3. LD7576/76J features Built-in Auto-Recovery function of OVP on Vcc pin OLP and On Chip OTP.
Absolute Maximum Ratings
Supply Voltage VCC 30V
High-Voltage Pin, HV -0.3V~600V
COMP, CT, CS -0.3 ~7V
Junction Temperature 150°C
Operating Ambient Temperature -40°C to 85°C
Storage Temperature Range -65°C to 150°C
Package Thermal Resistance (SOP-8) 160°C/W
Package Thermal Resistance (DIP-8) 100°C/W
Power Dissipation (SOP-8, at Ambient Temperature = 85°C) 400mW
Power Dissipation (DIP-8, at Ambient Temperature = 85°C) 650mW
Lead temperature (Soldering, 10sec) 260°C
ESD Voltage Protection, Human Body Model (except HV Pin) 3KV
ESD Voltage Protection, Machine Model 300V
Gate Output Current 500mA