ld7578 Leadtrend Technology, ld7578 Datasheet - Page 5

• Manufacturer Part Number: ld7578
• Description: Green-mode Pwm Controller With Hv Start-up Circuit And Otp Protection
• Manufacturer: Leadtrend Technology

Electrical Characteristics
Leadtrend Technology Corporation
LD7578-DS-00 October 2008
(T
High-Voltage Supply (HV Pin)
High-Voltage Current Source
Off-State Leakage Current
Supply Voltage (Vcc Pin)
Startup Current
Operating Current
(with 1nF load on OUT pin)
UVLO (off)
UVLO (on)
OVP Level
Voltage Feedback (Comp Pin)
Short Circuit Current
Open Loop Voltage
Green Mode Threshold VCOMP
Burst Mode Threshold VCOMP
Current Sensing (CS Pin)
Maximum Input Voltage
Leading Edge Blanking Time
Input impedance
Delay to Output
Oscillator for Switching Frequency
Frequency
Green Mode Frequency
Temp. Stability
Voltage Stability
A
= +25
o
C unless otherwise stated, V
PARAMETER
www.leadtrend.com.tw
CC
=15.0V)
Vcc< UVLO(on), HV=500V
Vcc> UVLO(off), HV=500V
V
V
OLP tripped
OVP tripped
V
COMP pin open
COMP>1.9V
(-40°C ~105°C)
(VCC=11V-25V)
COMP
COMP
COMP
=0V
=3V
=0V
CONDITIONS
5
15.0
26.5
0.80
MIN
0.5
9.0
60
1
TYP
0.78
0.88
10.0
16.0
28.0
2.35
0.85
320
250
100
8.9
1.0
3.3
3.3
1.5
6.0
1.4
65
22
LD7578
MAX
11.0
17.0
29.5
0.90
1.5
3.8
3.8
2.2
35
70
5
1
UNITS
KHz
KHz
mA
mA
mA
mA
mA
mA
MΩ
μA
μA
nS
nS
%
%
V
V
V
V
V
V
V