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UC3875AL-S08-R датащи(PDF) 4 Page - Unisonic Technologies

номер детали UC3875AL-S08-R
подробное описание детали  LOW COST POWER-SAVING MODE PWM CONTROLLER
PDF  10 Pages
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производитель  UTC [Unisonic Technologies]
домашняя страница  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

UC3875AL-S08-R датащи(HTML) 4 Page - Unisonic Technologies

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UC3875A
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
4 of 10
www.unisonic.com.tw
QW-R103-127.E
ABSOLUTE MAXIMUM RATINGS (TA=25°C, VDD =15V, unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VDD
35
V
Input Voltage to FB Pin
VFB
-0.3 ~ 7
V
Input Voltage to CS Pin
VCS
-0.3 ~ 7
V
Junction Temperature
TJ
+150
C
Operating Temperature
TOPR
-40 ~ +125
°C
Storage Temperature
TSTG
-50 ~ +150
C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
OPERATING RANGE
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VDD
10 ~ 24
V
ELECTRICAL CHARACTERISTICS (TA=25°C, VDD=15V, RI =100KΩ，unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
HV START
MOSFET Drain-Source break Voltage
BVDSS
600
V
Supply Current from ST Pin
IST
0.75
mA
Start Pin Leakage Current After Startup
IEAKAGE
10
μA
SUPPLY SECTION
Start Up Current
ISTR
VDD=VDD(ON)-0.5V
2
15
μA
IC Operating current
IOP
VFB=3.5V
0.8
1.8
mA
VCC Zener Clamp Voltage
VCC(clamp) IVCC=20mA
31
33
35
V
UNDER-VOLTAGE LOCKOUT SECTION
Start Threshold Voltage
VTHD(ON)
16
18
20
V
Min. Operating Voltage
VDD(MIN)
6
7
8
V
CONTROL SECTION
VFB Open Loop Voltage Level
VFB-OPEN
5.4
V
Burst-Mode Out FB Voltage
VFB(OUT) VSENSE =0
1.5
V
Burst-Mode Enter FB Voltage
VFB(IN)
VSENSE =0
1.35
V
Normal
VFB=3.5V, RI=100KΩ
60
65
70
KHz
Switch Frequency
Power-Saving
FSW
Before enter burst mode
20
KHz
Duty Cycle
DMAX
VFB=3.5V, VSENSE=0
70
78
90
%
Frequency Hopping
FJ(SW)
-9
+9
%
Frequency VDD Stability
FDV
VDD=12V~20V
10
%
Frequency Temperature Stability
FDT
T=-40~85°C
10
%
RI Resistor Value Range
RI
50
100
150
KΩ
PROTECTION SECTION
VCC Over Voltage Protection Threshold
VOVP
VFB=3.9V
25
27
29
V
FB PIN Over Load Protection Threshold
VOLP
4.2
V
Soft start time
TSS
5
mS
Over Load Protection Delay-Time
TDelay
60
88
120
mS
OTP threshold
T(THR)
VFB=3.9V
150
°C
CURRENT LIMITING SECTION
Peak Current Flat Threshold Voltage
VCS-F
0.92
V
Peak Current Valley Threshold Voltage
VCS-V
VFB=4.0V, Duty=0%
0.60
0.65
0.70
V
Lead Edge Blanking Time
TLEB
200
350
550
ns



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