UC3843ADR2 ON Semiconductor, UC3843ADR2 Datasheet - Page 4
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UC3843ADR2
Manufacturer Part Number
UC3843ADR2
Description
IC CTRLR CURRENT MODE HP 14SOIC
Manufacturer
ON Semiconductor
Type
High Performance Current Mode Controllersr
Datasheet
1.UC2843ADR2.pdf
(18 pages)
Specifications of UC3843ADR2
Pwm Type
Current Mode
Number Of Outputs
1
Frequency - Max
500kHz
Duty Cycle
96%
Voltage - Supply
8.2 V ~ 25 V
Buck
No
Boost
No
Flyback
Yes
Inverting
No
Doubler
No
Divider
No
Cuk
No
Isolated
Yes
Operating Temperature
0°C ~ 70°C
Package / Case
14-SOIC (3.9mm Width), 14-SOL
Frequency-max
500kHz
Output Voltage Range
4.9 V to 5.1 V
Input Voltage Range
30 V
Operating Temperature Range
0 C to + 70 C
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
UC3843ADR2OSTR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
UC3843ADR2
Manufacturer:
MOTOROLA/摩托罗拉
Quantity:
20 000
Part Number:
UC3843ADR2G
Manufacturer:
MOTOROLA/摩托罗拉
Quantity:
20 000
4. Adjust V
5. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
6. This parameter is measured at the latch trip point with V
7. Comparator gain is defined as: A
ELECTRICAL CHARACTERISTICS
unless otherwise noted.)
CURRENT SENSE SECTION
OUTPUT SECTION
UNDERVOLTAGE LOCKOUT SECTION
PWM SECTION
TOTAL DEVICE
Current Sense Input Voltage Gain (Notes 6 & 7)
Maximum Current Sense Input Threshold (Note 6)
Power Supply Rejection Ratio
Input Bias Current
Propagation Delay (Current Sense Input to Output)
Output Voltage
Output Voltage with UVLO Activated
Output Voltage Rise Time (C
Output Voltage Fall Time (C
Startup Threshold
Minimum Operating Voltage After Turn−On
Duty Cycle
Power Supply Current (Note 4)
Power Supply Zener Voltage (I
T
V
Low State (I
Low State
High State
V
UCX842A
UCX843A
UCX842A
UCX843A
Maximum
Minimum
Startup:
(V
(V
High State (I
low
CC
CC
CC
CC
= 0°C for UC3842A, UC3843A
= 12 to 25 V (Note 6)
= 6.0 V, I
= 6.5 V for UCX843A,
=
−25°C for UC2842A, UC2843A
CC
14 V for UCX842A) Operating
above the Startup threshold before setting to 15 V.
(I
(I
Sink
Sink
Sink
Sink
Sink
Characteristics
= 200 mA)
= 20 mA)
= 200 mA)
= 20 mA)
= 1.0 mA
L
L
= 1.0 nF, T
= 1.0 nF, T
CC
= 25 mA)
V
UC3842A, UC3843A, UC2842A, UC2843A
DV Output Compensation
DV Current Sense Input
J
(V
J
= 25°C)
CC
= 25°C)
= 15 V, [Note 4], R
T
high
= +70°C for UC3842A, UC3843A
V
t
PLH(in/out)
Symbol
V
OL(UVLO)
DC
http://onsemi.com
PSRR
DC
+85°C for UC2842A, UC2843A
CC(min)
V
V
FB
I
V
V
A
V
I
CC
IB
OH
t
t
OL
max
V
th
r
f
th
min
Z
= 0 V.
T
= 10 k, C
4
2.85
Min
0.9
7.8
9.0
7.0
13
12
15
94
30
−
−
−
−
−
−
−
−
−
−
−
T
UC284XA
= 3.3 nF, T
−2.0
13.5
13.4
Typ
150
3.0
1.0
0.1
1.6
0.1
8.4
7.6
0.5
70
50
50
16
10
96
12
36
−
A
Max
3.15
−10
300
150
150
= T
1.1
0.4
2.2
1.1
9.0
8.2
1.0
17
11
17
−
−
−
−
0
−
low
to T
2.85
14.5
Min
0.9
7.8
8.5
7.0
13
12
94
30
high
−
−
−
−
−
−
−
−
−
−
−
[Note 5],
UC384XA
−2.0
13.5
13.4
Typ
150
3.0
1.0
0.1
1.6
0.1
8.4
7.6
0.5
70
50
50
16
10
96
12
36
−
Max
3.15
17.5
11.5
−10
300
150
150
1.1
0.4
2.2
1.1
9.0
8.2
1.0
17
−
−
−
−
0
−
Unit
V/V
mA
dB
mA
ns
ns
ns
%
V
V
V
V
V
V