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UC2843BL-S08-R Arkusz danych(PDF) 4 Page - Unisonic Technologies

Numer części UC2843BL-S08-R
Szczegółowy opis  HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS
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Producent  UTC [Unisonic Technologies]
Strona internetowa  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

UC2843BL-S08-R Arkusz danych(HTML) 4 Page - Unisonic Technologies

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UC2843B
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
4 of 8
www.unisonic.com.tw
QW-R103-048.D
ELECTRICAL CHARACTERISTICS(Cont.)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX UNIT
OSCILLATOR SECTION
Frequency
fOSC
TJ =25°C, RT =62kΩ, CT =1nF,
Min =225 kHz, Max =275 kHz
49
52
55
kHz
TJ = Full range
48
56
kHz
Frequency Change with Voltage
V
f
OSC
VCC = 12V ~ 25V
0.2
1
%
Frequency Change with
Temperature
T
f
OSC
TJ = Full range
5
%
Oscillator Voltage Swing
VOSC
Peak to peak
1.7
V
Discharge Current
IDISC
TJ =25°C, RT/CT =2V
7.8
8.3
8.8
mA
RT/CT =2V
7.5
8.8
mA
ERROR-AMPLIFIER SECTION
Voltage Feedback Input
VFB
COMP =2.5V
2.45
2.5
2.55
V
Input Bias Current
II(BIAS)
-0.3
-1
μA
Open Loop Voltage Gain
GVO
VOUT =2V~4V
65
90
dB
Unity Gain Bandwidth
GBW
0.7
1
MHz
Power Supply Rejection Ratio
PSRR
VCC =12V~25V
60
70
dB
Output Sink Current
ISINK
VFB =2.7V, COMP=1.1V
2
6
mA
Output Source Current
ISOURCE
VFB =2.3V, COMP =5V
-0.5
-0.8
mA
Output Voltage Swing High State
VOH
VFB =2.3V, RL =15kΩ to GND
5
6
V
VOL
VFB =2.7V, RL =15kΩ to GND
0.7
1.1
V
CURRENT-SENSE SECTION
Current Sense Input Voltage Gain
GV
(Note 2,3)
2.85
3
3.15
V/V
Maximum Current Sense Input
Threshold
VTH
COMP =5V (Note 2)
0.9
1
1.1
V
Power Supply Rejection Ratio
PSRR
VCC =12V~25V (Note 2)
70
dB
Input Bias Current
II(BIAS)
-2
-10
μA
Propagation Delay
tD
VFB =0V~2V
150
300
ns
OUTPUT SECTION
High-Level Output Voltage
VOH
IOH =-20mA
13
13.5
V
IOH =-200mA
12
13.5
V
Low-Level Output Voltage
VOL
IOL =20mA
0.1
0.4
V
IOL =200mA
1.5
2.2
V
Under-Voltage Lockout
Output Voltage
VUVLO
VCC =5V, IOL=1mA
0.7
1.2
V
Output Voltage Rise Time
tR
CL =1nF, TJ = 25°C
50
150
ns
Output Voltage Fall Time
tF
CL =1nF, TJ = 25°C
50
150
ns
UNDERVOLTAGE-LOCKOUT SECTION
Startup Threshold
VTH
7.8
8.4
9
V
Minimum Operating Voltage
After Start-Up
VCC(MIN)
7
7.6
8.2
V
PULSE-WIDTH MODULATOR SECTION
Maximum Duty Cycle
DC(MAX)
94
96
100
%
Minimum Duty Cycle
DC(MIN)
0
%
SUPPLY VOLTAGE
Power Startup Supply Current
ICC+IC
0.3
0.5
mA
Power Operating Supply Current
ICC+IC
VFB and ISENSE at 0V
11
17
mA
Power Supply Zener Voltage
VZ
ICC =25mA
30
34
V
Notes: 1. Adjust VCC above the start threshold before setting it to 15V.
2. Measured at the trip point of the latch, with VFB at 0V.
3. Measured between ISENSE and COMP, with the input changing from 0V ~ 0.8V.


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