UC3843D8 UNITRODE, UC3843D8 Datasheet - Page 4

• Manufacturer Part Number: UC3843D8
• Description: PWM CONTROLLER, SMD, 3843, SOIC8
• Manufacturer: UNITRODE

Specifications of UC3843D8

• Input Voltage: 15V
• Output Voltage: 5V
• Output Current: 200mA
• Frequency: 500kHz
• Power Dissipation Pd: 650mW
• Supply Voltage Range: 12V To 25V
• Digital Ic Case Style: SOIC
• No. Of Pins: 8
• Operating: RoHS Compliant

UC1842/3/4/5
UC2842/3/4/5
UC3842/3/4/5
SLUS223C – APRIL 1997 – REVISED JUNE 2007
4
ELECTRICAL CHARACTERISTICS (continued)
Unless otherwise stated, these specifications apply for –55 C
UC284X; 0 C
(5) These parameters, although specified, are not 100% tested in production.
(6) Parameter measured at trip point of latch with V
(7) Gain defined as:
ERROR AMP SECTION
Input Voltage
Input Bias Current
A
Unity Gain Bandwidth
PSRR
Output Sink Current
Output Source Current
V
V
CURRENT SENSE SECTION
Gain
Maximum Input Signal
PSRR
Input Bias Current
Delay to Output
OUTPUT SECTION
Output Low Level
Output High Level
Rise Time
Fall Time
UNDER-VOLTAGE LOCKOUT SECTION
Start Threshold
Min. Operating Voltage After
Turn On
PWM SECTION
Maximum Duty Cycle
Minimum Duty Cycle
TOTAL STANDBY CURRENT
Start-Up Current
Operating Supply Current
V
VOL
OUT
OUT
CC
Zener Voltager
High
Low
PARAMETER
T
A
A + DVPIN 1
70 C for the 384X; V
DVPIN 3
V
2
T
12
V
V
V
V
See
V
12
V
I
I
I
I
T
T
X842/4
X843/5
X842/4
X843/5
X842/3
X844/5
V
I
SINK
SINK
SOURCE
SOURCE
CC
, 0 v VPIN 3 v 0.8 V
J
J
J
PIN 1
PIN 2
PIN 2
PIN 2
PIN 2
PIN 1
PIN 3
PIN 2
= 25 C
= 25°C, C
= 25 C, C
V
= 25 mA
(6) (7)
V
V
O
= 20 mA
= 200 mA
= 2.5 V
CC
= 2.7 V, V
= 2.3 V, V
= 2.3 V, R
= 2.7 V, R
= 5 V
CC
= 0 V to 2 V
= V
4 V
= 20 mA
= 200 mA
PIN 3
TEST CONDITIONS
(5)
25 V
25 V
CC
(6)
L
L
= 15 V; R
= 1 nF
= 1nF
= 0 V
PIN 1
PIN 1
(5) (6)
L
L
PIN 2
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= 15 k
= 15 k
(5)
(5)
= 1.1 V
= 5 V
(5)
= 0.
T
= 10 k ; C
to ground
to Pin 8
T
A
T
= 3.3 nF, T
125 C for the UC184X; –40 C
95%
46%
2.45
–0.5
2.85
MIN
0.7
0.9
7.8
7.0
65
60
13
12
15
30
UC1842/3/4/5
UC2842/3/4/5
2
5
9
A
TYP
2.50
–0.3
–0.8
13.5
13.5
97%
48%
= T
150
0.7
0.1
1.5
8.4
7.6
0.5
90
70
70
–2
50
50
16
10
11
34
1
6
6
3
1
J
.
100%
MAX
50%
2.55
3.15
–10
300
150
150
0%
1.1
1.1
0.4
2.2
9.0
8.2
–1
17
11
17
1
95%
47%
2.42
–0.5
2.85
14.5
MIN
0.7
0.9
7.8
8.5
7.0
65
60
13
12
30
UC3842/3/4/5
2
5
T
A
TYP
2.50
–0.3
–0.8
13.5
13.5
97%
48%
150
0.7
0.1
1.5
8.4
7.6
0.5
85 C for the
90
70
70
–2
50
50
16
10
11
34
1
6
6
3
1
100%
MAX
50%
2.58
3.15
17.5
11.5
–10
300
150
150
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0%
1.1
1.1
0.4
2.2
9.0
8.2
–2
17
1
UNIT
MHz
V/V
mA
mA
dB
dB
dB
ns
ns
V
V
V
V
V
V
A
A