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LD5523T
04/08/2021
5
Leadtrend Technology Corporation
www.leadtrend.com.tw
LD5523T-DS-00 April 2021
Electrical Characteristics
(TA = +25
oC unless otherwise stated, VCC=15.0V)
PARAMETER
CONDITIONS
SYMBOL
MIN
TYP
MAX
UNITS
Supply Voltage (VCC Pin)
Startup Current
ICC_ST
1
A
Operating Current
(with 1nF load on OUT pin)
VCOMP=0V
ICC_OP1
0.295
mA
VCOMP=1.7V,IFB=200AICC_OP2
1.95
mA
Auto current protection
ICC_OPA1
0.6
mA
UVLO(OFF)
VCC_OFF
5.3
6.3
7.3
V
UVLO(ON)
VCC_ON
15.5
16.5
17.5
V
VCC OVP Level
VCC_OVP
30
31
31.9
V
VCC OVP de-bounce time
TVCC_OVP
6
8
10
Cycle
Voltage Feedback (COMP Pin)
Short Circuit Current
VCOMP=0V
ICOMP
0.08
0.116
0.15
mA
Open Loop Voltage
(1)
VCOMP_OPEN
3
3.15
3.3
V
Current Sensing (CS Pin)
Maximum Input Voltage
VCS_LIMIT
0.45
0.5
0.55
V
Leading Edge Blanking Time
TLEB
270
450
630
ns
Internal Slope Compensation
*ton>3
s
to
DMAX.
(Linearly increase)
(1)
VSLP_L
165
mV
QRD (Quasi Resonant Detection, FB Pin)
FB OVP Trip voltage Level
During soft-start
VFB_OVP
1.25
V
FB OVP Trip voltage Level
After soft-start
(1)
VFB_OVP
2.65
2.85
3.05
V
FB UVP Trip voltage Level
VFB_UVP
0.85
V
FB UVP 1 De-bounce Time
After start-up +15ms
(1)
TFB_UVP1
8
Cycle
FB UVP 2 De-bounce Time
After start-up +15ms
(1)
TFB_UVP2
6
Cycle
QRD Trip Level
(1)
IQRD
20
A
Oscillator for Switching Frequency
CCM Frequency
FCCM
60
65
70
kHz
Frequency Swapping
(1)
FSW_MOD
±
8
%
Green Mode Frequency
FSW_GREEN
21
24
27
kHz
Temp. Stability
(1)
FSW_TS
3
5
%
Voltage Stability
VCC =9V~24V
(1)
FSW_VS
1
%
Maximum Duty
(1)
DMAX
81
%



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