SG3844M Microsemi Analog Mixed Signal Group, SG3844M Datasheet

SG3844M

Manufacturer Part Number

SG3844M

Description

IC PWM CURRENT MODE 8DIP

Manufacturer

Microsemi Analog Mixed Signal Group

Datasheet

1.SG3845M.pdf (12 pages)

Specifications of SG3844M

Pwm Type

Current Mode

Number Of Outputs

Frequency - Max

500kHz

Duty Cycle

50%

Voltage - Supply

8.2 V ~ 30 V

Buck

Yes

Boost

Flyback

Inverting

Doubler

Divider

Cuk

Isolated

Yes

Operating Temperature

0°C ~ 70°C

Package / Case

8-DIP

Frequency-max

500kHz

Lead Free Status / RoHS Status

Request inventory verification / Request inventory verification

Current page: 1 of 12
Download datasheet (354Kb)

Rev. 1.6c,2006-02-02

-25 to 85

STD/883

The SG1844/45 family of control ICs

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

improved line regulation, improved load

regulation, pulse-by pulse current limiting

and inherent protection of the power supply

output switch.

trimmed to ±1% over temperature. Oscillator

discharge current is trimmed to less than

±10%. The SG1844/45 has undervoltage

lockout, current-limiting circuitry

H E

0 to 70

DESC

-55 to

MIL-

Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LXSG3844N-TR)

125

IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com

(°C)

N F I N I T E

SG3844M

SG3845M

SG2844M

SG2845M

Plastic DIP

8-Pin

RoHS Compliant / Pb-free

INPUT

Transition DC: 0503

architecture

The bandgap reference is

O W E R

SG28424N

SG3844N

SG3845N

SG2845N

Plastic DIP

14-Pin

11861 W

P R O D U C T H I G H L I G H T

demonstrates

O F

ESTERN

D E S C R I P T I O N

SG3844DM

SG3845DM

SG2844DM

SG2845DM

I N

Plastic SOIC

8-Pin

N N O V A T I O N

VENUE

RoHS Compliant / Pb-free

I N I T Y

Transition DC:0440

, G

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. Both operate up to a

maximum duty cycle range of zero to <50%

due to an internal toggle flip-flop which

blanks the output off every other clock

cycle. The SG1844/45 is specified for

operation over the full military ambient

temperature range of -55°C to 125°C. The

SG2844/45 is specified for the industrial

range of -25°C to 85°C, and the SG3844/45

is designed for the commercial range of 0°C

to 70°C.

PACKAGE ORDER INFO

ARDEN

SG3844

SG3844D

SG3845D

SG2842D

SG2845D

Plastic SOIC

14-Pin

I C R O E L E C T R O N I C S

ROVE

, CA. 92841, 714-898-8121, F

SG1844Y/DESC

SG1842Y/883B

SG1845Y/883B

Ceramic Dip

8-Pin

SG3844Y

SG3845Y

SG2844Y

SG2845Y

SG1844Y

SG1845Y

U R R E N T

R O D U C T I O N

SG1844J/DESC

N C

SG1844J/883B

SG1845J/883

O D E

Ceramic DIP

14-Pin

: 714-893-2570

SG3844J

SG3845J

SG2844J

SG2845J

SG1844J

SG1845J

SG1844/SG1845 Series

P W M C

A T A

SG1844F/DESC SG1844L/DESC

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

(SG1844 only)

DOUBLE PULSE

SUPPRESSION

HIGH-CURRENT TOTEM-POLE

OUTPUT

INTERNALLY TRIMMED

BANDGAP REFERENCE

500kHz OPERATION

UNDERVOLTAGE LOCKOUT

SG1844 - 16 volts SG1845 - 8.4

volts

LOW SHOOT-THROUGH

CURRENT <75mA OVER

TEMPERATURE

AVAILABLE TO MIL-STD-883B

LINFINITY LEVEL "S"

PROCESSING AVAILABLE

H I G H R E L I A B I L I T Y

Cer Flatpack

10-Pin

O N T R O L L E R

K E Y F E A T U R E S

F E A T U R E S

H E E T

SG1844L/883B

SG1845L/883B

SG1844L

SG1845L

Ceramic LCC

20-Pin

Related parts for SG3844M

SG3844M Summary of contents

Page 1

... INPUT Plastic DIP Plastic DIP 8-Pin 14-Pin T (°C) A RoHS Compliant / Pb-free Transition DC: 0503 SG3844M SG3844N SG3845M SG3845N SG2844M SG28424N - SG2845M SG2845N -55 to 125 MIL- STD/883 DESC Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LXSG3844N-TR) L Copyright © ...

Page 2

SG1844/SG1845 Series Supply Voltage (I < 30mA) ............................................................... Self Limiting CC Supply Voltage (Low Impedance Source) ........................................................ 30V Output ...

Page 3

...

Page 4

SG1844/SG1845 Series Parameter Current Sense Section Gain (Notes 5 & 6) Maximum Input Signal (Note 5) Power Supply Rejection Ratio (Note 5) PSRR Input Bias Current Delay to Output (Note 4) Output Section Output Low Level Output High Level Rise ...

Page 5

34V GROUND** 16V (1844) 8.4 (1845) 2.5V OSCILLATOR ERROR ...

Page 6

SG1844/SG1845 Series GRAPH / CURVE INDEX Characteristic Curves FIGURE # 1. DROPOUT VOLTAGE vs. TEMPERATURE 2. OSCILLATOR TEMPERATURE STABILITY 3. CURRENT SENSE TO OUTPUT DELAY vs. TEMPERATURE 4. START-UP CURRENT vs. TEMPERATURE 5. REFERENCE VOLTAGE vs. TEMPERATURE 6. START-UP VOLTAGE ...

Related keywords

sg384
sg3845
sg3844
sg3846
sg3843
sg3842
sg3846n
sg3845m
sg3844m
sg3844dm
sg3843m
sg3842m
SG3844M datasheet
SG3844M data sheet
SG3844M pdf datasheet
SG3844M component
SG3844M part
SG3844M distributor
SG3844M RoHS
SG3844M datasheet download

SG3844M Microsemi Analog Mixed Signal Group, SG3844M Datasheet

SG3844M

Specifications of SG3844M

Related parts for SG3844M

SG3844M Summary of contents

Page 1

Page 2

Page 3

Page 4

Page 5

Page 6

Page 7

Page 8

Page 9

Page 10

Page 11

Page 12

Related keywords