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LD7750R 데이터시트 PDF




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부품번호 LD7750R 기능
기능 High Voltage Green-Mode PWM Controller
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LD7750R 데이터시트, 핀배열, 회로
LD7750R
05/12/2010
High Voltage Green-Mode PWM Controller with
Over Temperature Protection
Rev. 00
General Description
The LD7750R integrates several functions of protections,
and EMI-improved solution in a SOP-7, SOP-8 or DIP-8
package to minimize 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, the LD7750R features more
protections like OLP (Over Load Protection), OVP (Over
Voltage Protection), and OTP (Over Temperature
Protection) to prevent the circuit being damaged under the
abnormal conditions. The LD7750R features built-in
auto-recovery function for OVP on Vcc pin and OLP.
Features
z High-Voltage (500V) Startup Circuit
z Current Mode Control
z Green Mode Control
z UVLO (Under Voltage Lockout)
z LEB (Leading-Edge Blanking) on CS Pin
z Internal Frequency Swapping
z Internal Slope Compensation
z Internal Over Current Protection
z OVP (Over Voltage Protection) on Vcc
z OLP (Over Load Protection)
z External OTP through a NTC
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
LD7750R-DS-00 May 2010
1
www.leadtrend.com.tw




LD7750R pdf, 반도체, 판매, 대치품
Absolute Maximum Ratings
Supply Voltage VCC
High-Voltage Pin, HV
COMP, OTP, CS
OUT
Maximum Junction Temperature
Operating Ambient Temperature
Operating Junction Temperature
Storage Temperature Range
Package Thermal Resistance (SOP-7/ SOP-8)
Package Thermal Resistance (DIP-8)
Power Dissipation (SOP-7/ 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
Gate Output Current
LD7750R
-0.3V~30V
-0.3V~500V
-0.3 ~7V
-0.3 ~Vcc+0.3
150°C
-20°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
LD7750R-DS-00 May 2010
4
www.leadtrend.com.tw

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LD7750R 전자부품, 판매, 대치품
LD7750R
Typical Performance Characteristics
1.5
0.88
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)
1 8. 0
1 7. 2
1 6. 4
0.87
0.86
0.85
0.84
0 .83 - 40
12
11 .2
10 .4
0 40 80
Temperature (°C)
Fig. 2 VCS (off) vs. Temperature
120 125
1 5. 6
1 4. 8
14.0 -40
70
68
66
64
62
60-40
0
Fig. 3
40 80
Temperature (°C)
UVLO (on) vs. Temperature
120 125
0 40 80
Temperature (°C)
Fig. 5 Frequency vs. Temperature
120 125
9. 6
8 .8
8
-40
25
0
Fig. 4
40 80
Temperature (°C)
UVLO (off ) vs. Temperature
120 125
23
21
19
17
15
-40
Fig. 6
0 40 80 120 125
Temperature (°C)
Green Mode Frequency vs. Temperature
Leadtrend Technology Corporation
LD7750R-DS-00 May 2010
7
www.leadtrend.com.tw

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