SG3842D Microsemi Corporation, SG3842D Datasheet

SG3842D

Manufacturer Part Number

SG3842D

Description

Current Mode PWMs

Manufacturer

Microsemi Corporation

Datasheet

1.SG3842D.pdf (14 pages)

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Price

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Bonase Electronics (HK) Co., Limited

Part Number:

SG3842D

Manufacturer:

LINFINITY

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Part Number:

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Current page: 1 of 14
Download datasheet (406Kb)

Rev. 1.6a,2005-03-09

-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

Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. SG2843DM-TR)

RoHS compliant

H E

0 to 70

DESC

-55 to

MIL-

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

125

(°C)

N F I N I T E

RoHS / Pb-free Transition DC: 0503

SG3842M

SG3843M

SG2842M

SG2843M

Plastic DIP

8-Pin

INPUT

O W E R

SG3842N

SG3843N

SG2842N

SG2843N

Plastic DIP

14-Pin

11861 W

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

O F

ESTERN

D E S C R I P T I O N

I N

SG3842DM

SG3843DM

SG2842DM

SG2843DM

N N O V A T I O N

Plastic SOIC

8-Pin

RoHS / Pb-free Transition DC:0440

VENUE

I N I T Y

, G

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

ARDEN

SG3842

SG3842D

SG3843D

SG2842D

SG2843D

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

Plastic SOIC

14-Pin

ROVE

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

SG1842Y/DESC

SG1842Y/883B

SG1843Y/883B

SG3842Y

SG3843Y

SG2842Y

SG2843Y

SG1842Y

SG1843Y

Ceramic Dip

8-Pin

U R R E N T

R O D U C T I O N

SG1842J/DESC

SG1842J/883B

N C

SG1843J/883

O D E

Ceramic DIP

14-Pin

SG3842J

SG2842J

SG2843J

SG1842J

SG1843J

: 714-893-2570

SG1842 / 2842 / 3842

P W M C

A T A

SG1842F/DESC SG1842L/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 (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

DESC SMD

SCHEDULED FOR MIL-M38510

QPL LISTING

RADIATION DATA AVAILABLE

LINFINITY LEVEL "S"

PROCESSING 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

Cer Flatpack

10-Pin

O N T R O L L E R

F E A T U R E S

H E E T

SG1842L/883B

SG1843L/883B

SG1842L

Ceramic LCC

20-Pin

Related parts for SG3842D

SG3842D Summary of contents

Page 1

... SG3842 PACKAGE ORDER INFO Plastic SOIC Plastic SOIC Ceramic Dip D Y 8-Pin 14-Pin 8-Pin RoHS / Pb-free Transition DC:0440 SG3842DM SG3842D SG3842Y SG3843DM SG3843D SG3843Y SG2842DM SG2842D SG2842Y SG2843DM SG2843D SG2843Y SG1842Y SG1843Y SG1842Y/883B SG1843Y/883B SG1842Y/DESC ...

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 ...

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