LT1243 Linear Technology Corporation, LT1243 Datasheet

LT1243

Manufacturer Part Number

LT1243

Description

Manufacturer

Linear Technology Corporation

Datasheets

1.LT1243.pdf (16 pages)

2.LT1243.pdf (16 pages)

Specifications of LT1243

Case

SOP8

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LT1243CN8

Manufacturer:

Quantity:

5 510

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LT1243CN8

Manufacturer:

Quantity:

5 510

Company:

Meier Automation Equipment Co., Limited

Part Number:

LT1243CN8

Manufacturer:

LT/凌特

Quantity:

20 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

LT1243CN8#PBF

Manufacturer:

LINEAR/凌特

Quantity:

20 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

LT1243CS8

Manufacturer:

LINEAR/凌特

Quantity:

20 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

LT1243CS8#PBF

Manufacturer:

LINEAR/凌特

Quantity:

20 000

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LT1243IN8

Manufacturer:

Quantity:

5 510

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LT1243IN8

Manufacturer:

NSC

Quantity:

5 510

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LT1243IN8#PBF

Manufacturer:

Linear Technology

Quantity:

135

Company:

Meier Automation Equipment Co., Limited

Part Number:

LT1243IS8

Manufacturer:

LINEAR/凌特

Quantity:

20 000

Current page: 1 of 16
Download datasheet (335Kb)

BLOCK

FEATURE

, LTC and LT are registered trademarks of Linear Technology Corporation.

PPLICATI

Low Start-Up Current: < 250 A

50ns Current Sense Delay

Current Mode Operation: To 500kHz

Pin Compatible with UC1842 Series

Undervoltage Lockout with Hysteresis

No Cross-Conduction Current

Trimmed Bandgap Reference

1A Totem Pole Output

Trimmed Oscillator Frequency and Sink Current

Active Pull-Down on Reference and Output During

Undervoltage Lockout

High Level Output Clamp: 18V

Current Sense Leading Edge Blanking

Off-Line Converters

DC/DC Converters

COMP

SENSE

I D AGRA

2.5V

–

1mA

5.6V

OSCILLATOR

–

MAIN BIAS

The LT

current mode, pulse width modulators. They are improved

plug compatible versions of the industry standard UC1842

series. These devices have both improved speed and

lower quiescent current. The LT1241 series is optimized

for off-line and DC/DC converter applications. They con-

tain a temperature-compensated reference, high gain er-

ror amplifier, current sensing comparator and a high

current totem pole output stage ideally suited to driving

power MOSFETs. Start-up current has been reduced to

less than 250 A. Cross-conduction current spikes in

the output stage have been eliminated, making 500kHz

operation practical. Several new features have been incor-

porated. Leading edge blanking has been added to the

current sense comparator. Trims have been added to the

oscillator circuit for both frequency and sink current, and

both of these parameters are tightly specified. The output

stage is clamped to a maximum V

on state. The output and the reference output are actively

pulled low during undervoltage lockout.

5V REF

ESCRIPTIO

High Speed Current Mode

1241 series devices are 8-pin, fixed frequency,

REFERENCE PULL-DOWN

REFERENCE ENABLE

Pulse Width Modulators

BLANKING

1.5V

–

PULL-DOWN

OUTPUT

LOCKOUT

18V

LT1241 Series

OUT

of 18V in the

OUTPUT

GND

REF

1241 BD01

Related parts for LT1243

Related keywords

LT1243 datasheet
LT1243 data sheet
LT1243 pdf datasheet
LT1243 component
LT1243 part
LT1243 distributor
LT1243 RoHS
LT1243 datasheet download