SG2843M Microsemi Analog Mixed Signal Group, SG2843M Datasheet
SG2843M
Manufacturer Part Number
SG2843M
Description
IC PWM CURRENT MODE 8DIP
Manufacturer
Microsemi Analog Mixed Signal Group
Datasheet
1.SG3842M.pdf
(14 pages)
Specifications of SG2843M
Pwm Type
Current Mode
Number Of Outputs
1
Frequency - Max
500kHz
Duty Cycle
100%
Voltage - Supply
8.2 V ~ 30 V
Buck
No
Boost
No
Flyback
Yes
Inverting
No
Doubler
No
Divider
No
Cuk
No
Isolated
Yes
Operating Temperature
-25°C ~ 85°C
Package / Case
8-DIP
Frequency-max
500kHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Copyright © 2000
Rev. 1.6b 2010-03-15
-25 to 85
STD/883
The SG1842/43 family of control IC's provides all
the necessary features to implement off-line fixed
frequency, current-mode switching power supplies
with a minimum number of external components.
Current-mode architecture demonstrates improved
line regulation, improved load regulation, pulse-
by-pulse current limiting and inherent protection
of the power supply output switch. The bandgap
reference is trimmed to ±1% over temperature.
Oscillator discharge current is trimmed to less
than ±10%. The SG1842/43 has under-voltage
T
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. SG2843DM-TR)
Plastic packages are RoHS compliant
0 to 70
DESC
-55 to
A
MIL-
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
125
(°C)
M
RoHS / Pb-free Transition DC: 0503
TM
SG3842M
SG3843M
SG2842M
SG2843M
Plastic DIP
8-Pin
INPUT
AC
N
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
SG3842N
SG3843N
SG2842N
SG2843N
Plastic DIP
14-Pin
P R O D U C T H I G H L I G H T
D E S C R I P T I O N
DM
SG3842DM
SG3843DM
SG2842DM
SG2843DM
Plastic SOIC
8-Pin
RoHS / Pb-free Transition DC:0440
lockout, current limiting circuitry and start-up
current of less than 1mA. The totem-pole output
is optimized to drive the gate of a power
MOSFET. The output is low in the off state to
provide direct interface to an N channel device.
The SG1842/43 is specified for operation over
the full military ambient temperature range of -
55°C to 125°C. The SG2842/43 is specified for
the industrial range of -25°C to 85°C, and the
SG3842/43 is designed for the commercial range
of 0°C to 70°C.
PACKAGE ORDER INFO
Analog Mixed Signal Group
D
SG3842
®
V
SG3842D
SG3843D
SG2842D
SG2843D
Plastic SOIC
14-Pin
Microsemi
CC
R
I
ST
ST
SG1842Y/DESC
SG1843Y/DESC
C
SG1842Y/883B
SG1843Y/883B
Y
U R R E N T
SG3842Y
SG3843Y
SG2842Y
SG2843Y
SG1842Y
SG1843Y
Ceramic Dip
8-Pin
P
R O D U C T I O N
M
J
SG1842J/DESC
SG1843J/DESC
SG1842J/883B
SG1843J/883B
O D E
Ceramic DIP
14-Pin
SG3842J
SG3842J
SG2842J
SG2843J
SG1842J
SG1843J
SG1842/SG1843 Series
P W M C
D
A T A
SG1842F/DESC SG1842L/DESC
SG1843F/DESC SG1843L/DESC
F
SG1842F/883B
SG1843F/883B
OPTIMIZED FOR OFF-LINE
CONTROL
LOW START-UP CURRENT (<1mA)
AUTOMATIC FEED FORWARD
COMPENSATION
TRIMMED OSCILLATOR
DISCHARGE CURRENT
PULSE-BY-PULSE CURRENT
LIMITING
ENHANCED LOAD RESPONSE
CHARACTERISTICS
UNDER-VOLTAGE LOCKOUT
WITH 6V HYSTERESIS (SG1842
only)
DOUBLE-PULSE SUPPRESSION
HIGH-CURRENT TOTEM-POLE
OUTPUT (1AMP PEAK)
INTERNALLY TRIMMED BANDGAP
REFERENCE
500KHZ OPERATION
UNDERVOLTAGE LOCKOUT
SG1842 - 16 volts
SG1843 - 8.4 volts
LOW SHOOT-THROUGH
CURRENT <75mA OVER
TEMPERATURE
AVAILABLE TO MIL-STD-883B AND
SCHEDULED FOR MIL-M38510
RADIATION DATA AVAILABLE
Microsemi LEVEL "S" PROCESSING
DSCC
QPL LISTING
AVAILABLE
K E Y F E A T U R E S
H I G H R E L I A B I L I T Y
SG1842F
SG1843F
Cer Flatpack
10-Pin
O N T R O L L E R
S
F E A T U R E S
H E E T
L
SG1842L/883B
SG1843L/883B
SG1842L
SG1842L
Ceramic LCC
20-Pin
1
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SG2843M Summary of contents
Page 1
... A RoHS / Pb-free Transition DC: 0503 SG3842M SG3842N SG3843M SG3843N SG2842M SG2842N - SG2843M SG2843N -55 to 125 MIL- STD/883 DESC Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. SG2843DM-TR) Plastic packages are RoHS compliant Copyright © 2000 Rev. 1.6b 2010-03-15 11861 Western Avenue, Garden Grove, CA ...
Page 2
SG1842/SG1843 Series ...
Page 3
...
Page 4
SG1842/SG1843 Series ...
Page 5
34V GROUND** 16V (1842) 8.4V (1843) OSCILLATOR ERROR AMP ...
Page 6
SG1842/SG1843 Series GRAPH / CURVE INDEX Characteristic Curves FIGURE # 1. DROPOUT VOLTAGE vs. TEMPERATURE 2. ...
Page 7
FIGURE 1. — DROPOUT VOLTAGE vs. TEMPERATURE 10.0 SG1842 9.6 9.2 8.8 8.4 8.0 SG1843 -75 ...
Page 8
SG1842/SG1843 Series FIGURE 5. — START-UP CURRENT vs. TEMPERATURE 0.7 SG1842 0.6 0.5 0.4 0.3 SG1843 ...
Page 9
FIGURE 9. — OSCILLATOR DISCHARGE CURRENT vs. TEMPERATURE 8.2 8.0 7.8 7.6 7.4 7.2 -75 -50 ...
Page 10
SG1842/SG1843 Series OSCILLATOR The oscillator of the 1842/43 family of PWM's is designed such that many ...
Page 11
Pin numbers referenced are for 8-pin package and pin numbers in parenthesis are for 14-pin package. ...
Page 12
SG1842/SG1843 Series ...
Page 13
...
Page 14
SG1842/SG1843 Series ...