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Numéro de référence | LD7520 | ||
Description | Smart Green-Mode PWM Controller | ||
Fabricant | Leadtrend Technology | ||
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LD7520
11/29/2007
Smart Green-Mode PWM Controller with Multiple Protections
Spec. 02a
General Description
The LD7520 is a low startup current, current mode PWM
controller with green-mode power-saving operation. The
SOP-8/DIP-8 package integrated functions such as the
leading- edge blanking of the current sensing, internal slope
compensation, line compensation, and several protection
features. The protection functions include cycle-by-cycle
current limit, OVP, OTP, and OLP. It provides the users a
high efficiency, low external component counts solution for
AC/DC power applications.
Furthermore, to satisfy various protection requirements,
both latch-mode protection and auto-recoverable protection
can be easily achieved by configuring LD7520 in different
operation modes.
The special green-mode control is not only to achieve the
low power consumption but also to offer a non-audible-noise
operation when the LD7520 is operating under light load or
no load condition.
Features
z High-Voltage CMOS Process with Excellent ESD
protection
z Very Low Startup Current (< 35μA)
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 Programmable Line Compensation
z OVP (Over Voltage Protection)
z OLP (Over Load Protection)
z OTP (Over Temperature Protection) through a NTC
z Flexibility on Latch/Auto-Recoverable Protection Mode
z 500mA Driving Capability
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
LD7520-DS-02a November 2007
1
www.leadtrend.com.tw
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Pages | Pages 17 | ||
Télécharger | [ LD7520 ] |
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