LD7750R Datasheet PDF - Leadtrend
Part Number | LD7750R | |
Description | High Voltage Green-Mode PWM Controller | |
Manufacturers | Leadtrend | |
Logo | ||
There is a preview and LD7750R download ( pdf file ) link at the bottom of this page. Total 19 Pages |
Preview 1 page No Preview Available ! 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
|
|
Electrical Characteristics
(TA = +25°C unless otherwise stated, VCC=15.0V)
PARAMETER
CONDITIONS
High-Voltage Supply (HV Pin)
High-Voltage Current Source
Off-State Leakage Current
Supply Voltage (Vcc Pin)
Startup Current
VCC< UVLO(on), HV=500V
VCC> UVLO(off), HV=500V
Operating Current
(with 1nF load on OUT pin)
VCOMP=0V
VCOMP=3V,
OLP tripped
OVP tripped, VCC=OVP
UVLO (off)
UVLO (on)
OVP Level
Voltage Feedback (COMP Pin)
Short Circuit Current
Open Loop Voltage
VCOMP=0V
COMP pin open
Green Mode Threshold VCOMP
Zero Duty
Current Sensing (CS Pin)
Maximum Input Voltage, Vcs_off
Leading Edge Blanking Time
Input impedance
Delay to Output
LD7750R
MIN TYP MAX UNITS
0.5 1.0 1.5 mA
35 μA
200 320 400
1.2
2.3
0.61
0.70
9.0 10.0 11.0
15.0 16.0 17.0
25.0 26.0 27.0
μA
mA
mA
mA
mA
V
V
V
0.20 0.26 0.32
5.5 6.0
2.75
1.8
mA
V
V
V
0.80 0.85 0.90
V
250 ns
1 MΩ
100 ns
Leadtrend Technology Corporation
LD7750R-DS-00 May 2010
5
www.leadtrend.com.tw
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for LD7750R electronic component. |
Information | Total 19 Pages | |
Link URL | [ Copy URL to Clipboard ] | |
Download | [ LD7750R.PDF Datasheet ] |
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