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What is LD7660J?

This electronic component, produced by the manufacturer "Leadtrend", performs the same function as "Low Power Off-line Switcher".


LD7660J Datasheet PDF - Leadtrend

Part Number LD7660J
Description Low Power Off-line Switcher
Manufacturers Leadtrend 
Logo Leadtrend Logo 


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LD7660J
5/21/2009
Low Power Off-line Switcher
P03 (Internal use only)
General Description
The LD7660J integrated a 600V power MOSFET and a
current mode PWM controller in a DIP-8 package. It’s
operating at fixed frequency of 65 kHz. It provides important
functions needed for a low output power applications such
as leading-edge blanking of the current sensing, internal
slope compensation, and green-mode power-saving
operation under light load or no load condition. This highly
integrated device provides the users a high efficiency, low
external component counts, and low cost solution for low
power adaptor or charger applications.
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 LD7660J is operating under light load or
no load condition.
Features
z Built-in 600V/1A Power MOSFET
z Secondary-side/Primary-side feedback control
z Switching Frequency at 65KHz
z Fixed Internal Frequency Trembling
z Built-in Load Regulation Compensation
z Built-in Slope Compensation with 75% max duty-cycle
z Low Startup Current (<20μA)
z Current Mode Control with Cycle-by-Cycle Current
Limit
z Non-audible-noise Green Mode Control
z UVLO (Under Voltage Lockout)
z LEB (Leading-Edge Blanking) on CS Pin
z OVP (Over Voltage Protection) on Vcc
z OLP (Over Load Protection)
Applications
z Switching AC/DC Adaptor
z LCD TV or PC Standby Power
Typical Application
Secondary-side Feedback
Leadtrend Technology Corporation
LD7660J-DS-P03 May. 2009
1

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LD7660J equivalent
Absolute Maximum Ratings
Supply Voltage VCC
FB, S
Drain
Continuous drain current1, TC=25°C
LD7660J
Single Pulse Avalanche Energy2
LD7660J
Total Power Dissipation of DIP-8, Ta=25°C
Package thermal resistance (DIP-8)
θJA
θJA
θJC
Maximum Junction Temperature
Operating Junction Temperature Range
Operating Ambient Temperature Range
Storage Temperature Range
Lead temperature (DIP-8, Soldering, 10sec)
ESD Voltage Protection, Human Body Model
ESD Voltage Protection, Machine Model
1. Repetitive rating: Pulse width limited by maximum junction temperature
2. L=60mH, IDS=1A, VDD=150V, Starting TJ=25°C
3. w/o heat-sink, under natural convection
4. Infinite cooling Condition, refer to SEMI G30-88
5. Measured on the package top surface
LD7660J
30V
-0.3 ~7V
-0.3~600V
1.3A
30mJ
1.2W
80°C/W3
20°C/W4
35°C/W5
150
-40°C to 125
-40°C to 85°C
-50°C to 150°C
260°C
2.5 KV
250 V
Caution:
Stresses beyond the ratings specified in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only
rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not
limited.
Leadtrend Technology Corporation
LD7660J-DS-P03 May. 2009
5


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1. - Low Power Off-line Switcher

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LD7660JThe function is Low Power Off-line Switcher. LeadtrendLeadtrend

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