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부품번호 | LD7576 기능 |
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기능 | Green-Mode PWM Controller | ||
제조업체 | Leadtrend | ||
로고 | |||
LD7576/76H/76J/76K
12/5/2007
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
z High-Voltage (500V) Startup Circuit
z Current Mode Control
z Non-Audible-Noise Green Mode Control
z UVLO (Under Voltage Lockout)
z LEB (Leading-Edge Blanking) on CS Pin
z Internal Slope Compensation
z OVP (Over Voltage Protection) on Vcc
z On-Chip OTP (Over Temperature Protection)
z OLP (Over Load Protection)
z Latch Mode Protection by CT pin
z 500mA Driving Capability
z Adjustable OLP delay time
Applications
z Switching AC/DC Adaptor and Battery Charger
z Open Frame Switching Power Supply
z LCD Monitor/TV Power
Typical Application
Leadtrend Technology Corporation
LD7576-DS-03 December 2007
1
www.leadtrend.com.tw
Free Datasheet http://www.datasheet4u.net/
Block Diagram
LD7576/76H/76J/76K
∑
Leadtrend Technology Corporation
LD7576-DS-03 December 2007
4
www.leadtrend.com.tw
Free Datasheet http://www.datasheet4u.net/
4페이지 Electrical Characteristics
(TA = +25oC unless otherwise stated, VCC=15.0V)
PARAMETER
CONDITIONS
Low Frequency Timer (CT Pin)
Low Frequency Period
CT=0.047μF
Temp. Stability
(-40°C ~105°C)
Voltage Stability
(VCC=11V-25V)
Gate Drive Output (OUT Pin)
Output Low Level
VCC=15V, Io=20mA
Output High Level
VCC=15V, Io=20mA
Rising Time
Load Capacitance=1000pF
Falling Time
Load Capacitance=1000pF
OLP (Over Load Protection)
OLP Trip Level
OLP Delay Time
CT=0.1μF
CT=0.047μF
OTP (Over Temperature)
OTP Level
OTP Hysteresis
Latch Protection
CT Pin Trip Level for Latch Protection Low Activated
Timer for Power-on Verification
De-Latch Vcc Level
LD7576/76H/76J/76K
MIN
TYP
MAX UNITS
4.7 mS
5%
1%
1V
8V
50 160 nS
30 60 nS
5.0 V
110 mS
45 mS
140 °C
30 °C
0.8 V
250 mS
7.2 8 8.8 V
Leadtrend Technology Corporation
LD7576-DS-03 December 2007
7
www.leadtrend.com.tw
Free Datasheet http://www.datasheet4u.net/
7페이지 | |||
구 성 | 총 20 페이지수 | ||
다운로드 | [ LD7576.PDF 데이터시트 ] |
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