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LD7577B 데이터시트 PDF




Leadtrend에서 제조한 전자 부품 LD7577B은 전자 산업 및 응용 분야에서
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부품번호 LD7577B 기능
기능 High Voltage Green-Mode PWM Controller
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LD7577B 데이터시트, 핀배열, 회로
LD7577B
7/10/2009
High Voltage Green-Mode PWM Controller with
Brown-Out Protection
Rev. 00
General Description
The LD7577B integrates several functions of protections,
and EMI-improved solution in SOP-8/ DIP-8 package. It
minimizes the component counts and the circuit space.
The device provides functions of low startup current,
green-mode power-saving operation, leading-edge
blanking of the current sensing and internal slope
compensation. Also, it features more protections like
OLP (Over Load Protection), OVP (Over Voltage
Protection), and brownout protection to prevent the circuit
from being damaged under abnormal conditions.
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 Pin
z OLP (Over Load Protection)
z Precision Brownout Protection
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
AC
input
EMI
Filter
*
HV VCC OUT
BNO
LD7577B
CS
GND COMP
*
*See Application Information
photocoupler
TL431
Leadtrend Technology Corporation
LD7560-DS-00 July 2009
1
www.leadtrend.com.tw




LD7577B pdf, 반도체, 판매, 대치품
Absolute Maximum Ratings
Supply Voltage VCC
High-Voltage Pin, HV
COMP, BNO, CS
Maximum Junction Temperature
Operating Ambient Temperature Range
Operating Junction Temperature Range
Storage Temperature Range
Package Thermal Resistance (SOP-8)
Package Thermal Resistance (DIP-8)
Power Dissipation (SOP-8, at Ambient Temperature = 85°C)
Power Dissipation (DIP-8, at Ambient Temperature = 85°C)
Lead temperature (Soldering, 10sec)
ESD Voltage Protection, Human Body Model (except HV Pin)
ESD Voltage Protection, Machine Model (except HV Pin)
Gate Output Current
LD7577B
30V
-0.3V~500V
-0.3 ~7V
150°C
-40°C to 85°C
-40°C to 125°C
-65°C to 150°C
160°C/W
100°C/W
400mW
650mW
260°C
2.5KV
250V
500mA
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 implied.
Leadtrend Technology Corporation
LD7577B-DS-00 July 2009
4
www.leadtrend.com.tw

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LD7577B 전자부품, 판매, 대치품
LD7577B
Typical Performance Characteristics
1.5
1.3
1.1
0.9
0.7
-40
0 40 80
Temperature (°C)
120 125
Fig. 1 HV Current Source vs. Temperature (HV=500V, Vcc=0V)
18.0
17.2
16.4
15.6
14.8
14.0 -40
68
0
Fig. 3
40 80
Temperature (°C)
UVLO (on) vs. Temperature
120 125
66
64
62
60
58
57
-40 -20 0 20 40 60 80 100 120
Temperature (°C)
Fig. 5 TC of Switching Frequency
0.90
0.89
0.88
0.87
0.86
0.85 -40
12
11.2
0 40 80
Temperature (°C)
Fig. 2 VCS (off) vs. Temperature
120 125
10.4
9.6
8.8
8
-40
23
22
21
20
19
18
0
Fig. 4
40 80
Temperature (°C)
UVLO (off ) vs. Temperature
120 125
17 - 40
-20 0 20 40 60 80 100
Temperature (°C)
Fig. 6 TC of Green Mode frequency
120
Leadtrend Technology Corporation
LD7577B-DS-00 July 2009
7
www.leadtrend.com.tw

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부품번호상세설명 및 기능제조사
LD7577

High Voltage Green-Mode PWM Controller

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LD7577B

High Voltage Green-Mode PWM Controller

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