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SG3842DM

Description
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8, PLASTIC, SOIC-8
CategoryPower/power management    The power supply circuit   
File Size257KB,14 Pages
ManufacturerLinfinity Microelectronics
Download Datasheet Parametric View All

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SG3842DM Overview

Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8, PLASTIC, SOIC-8

SG3842DM Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
package instructionPLASTIC, SOIC-8
Reach Compliance Codeunknown
Is SamacsysN
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage25 V
Minimum input voltage12 V
Nominal input voltage15 V
JESD-30 codeR-PDSO-G8
JESD-609 codee0
Number of functions1
Number of terminals8
Maximum operating temperature70 °C
Minimum operating temperature
Maximum output current1 A
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Encapsulate equivalent codeSOP8,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Certification statusNot Qualified
surface mountYES
Switch configurationPUSH-PULL
Maximum switching frequency500 kHz
technologyBIPOLAR
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Base Number Matches1
L I N D
O C
# :
1842
SG1842/SG1843 Series
C
URRENT
M
ODE
PWM C
ONTROLLER
T
H E
I
N F I N I T E
P
O W E R
O F
I
N N O VA T I O N
P
R O D U C T I O N
D
A T A
S
H E E T
DESCRIPTION
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 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.
K E Y F E AT U R E S
s
OPTIMIZED FOR OFF-LINE CONTROL
s
LOW START-UP CURRENT (<1mA)
s
AUTOMATIC FEED FORWARD
COMPENSATION
s
TRIMMED OSCILLATOR DISCHARGE
CURRENT
s
PULSE-BY-PULSE CURRENT LIMITING
s
ENHANCED LOAD RESPONSE
CHARACTERISTICS
s
UNDER-VOLTAGE LOCKOUT WITH 6V
HYSTERESIS (SG1842 only)
s
DOUBLE-PULSE SUPPRESSION
s
HIGH-CURRENT TOTEM-POLE OUTPUT
(1AMP PEAK)
s
INTERNALLY TRIMMED BANDGAP
REFERENCE
s
500KHZ OPERATION
s
UNDERVOLTAGE LOCKOUT
SG1842 - 16 volts
SG1843 - 8.4 volts
s
LOW SHOOT-THROUGH CURRENT <75mA
OVER TEMPERATURE
PRODUCT HIGHLIGHT
T
Y P I C A L
A
P P L I C AT I O N
OF
S G 3 8 4 2 I
N
A F
LY B A C K
C
O N V E R T E R
R
ST
HIGH RELIABILITY FEATURES
s
AVAILABLE TO MIL-STD-883B AND DESC
SMD
s
SCHEDULED FOR MIL-M38510 QPL LISTING
s
RADIATION DATA AVAILABLE
s
LINFINITY LEVEL "S" PROCESSING AVAILABLE
AC
INPUT
I
ST
V
CC
SG3842
T
A
(°C)
0 to 70
-25 to 85
-55 to 125
MIL-STD/883
DESC
M
8-pin
Plastic DIP
N
PA C K A G E O R D E R I N F O R M AT I O N
Plastic DIP
Plastic SOIC
Plastic SOIC
Ceramic DIP
Ceramic DIP
DM
8-pin
D
14-pin
Y
8-pin
J
14-pin
14-pin
SG3842N
SG3843N
SG2842N
SG2843N
SG3842DM
SG3843DM
SG2842DM
SG2843DM
SG3842D
SG3843D
SG2842D
SG2843D
SG3842Y
SG3843Y
SG2842Y
SG2843Y
SG1842Y
SG1843Y
SG3842J
SG3843J
SG2842J
SG2843J
SG1842J
SG1843J
F
10-pin
Cer. Flatpack
L
20-pin
Ceramic LCC
SG3842M
SG3843M
SG2842M
SG2843M
SG1842L
SG1843L
SG1842L/883B
SG1843L/883B
SG1842Y/883B SG1842J/883B
SG1843Y/883B SG1843J/883B
SG1842Y/DESC SG1842J/DESC
SG1842F/DESC SG1842L/DESC
SG1843F/DESC SG1843L/DESC
SG1843Y/DESC SG1843J/DESC
Note: All surface-mount packages are available in Tape & Reel.
F O R F U R T H E R I N F O R M AT I O N C A L L ( 7 1 4 ) 8 9 8 - 8 1 2 1
Copyright © 2000
Rev. 1.6 4/00
11861 W
ESTERN
A
VENUE
, G
ARDEN
G
ROVE
, CA. 92841
1
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