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  • The ST1843 and ST1845 ICs are rad-tolerant current mode PWM controllers providing an industry standard solution for the implementation of off-line or DC to DC fixed frequency current mode control schemes with a minimal external part count.

    Its radiation hardness, hermetic packaging and its ESCC qualification make it an ideal choice for aerospace and other harsh environments.

    Key Features

    • Oscillator frequency guaranteed at 250 kHz
    • Trimmed oscillator for precise frequency control
    • Current mode operation to 500 kHz automatic feed forward compensation
    • Latching PWM for cycle-by-cycle current limiting
    • Internally trimmed reference with undervoltage lockout
    • High current totem pole output
    • Undervoltage lockout with hysteresis
    • Low start-up and operating current
    • Hermetic package
    • 50 krad (Si)
    • SEL free @ 120 MeV/cm2/mg at 125 °C
    • ESCC qualified

Sample & Buy

Part Number
Marketing Status
SMD PIN/Detailed Spec
Quality Level
EPPL
Hi-Rel Package
Lead Finish
Packing Type
Package: Product Marking
More info
Order from Distributors
Order from ST
ST1845K1
Active
- Engineering Model - Flat-8 Gold Carrier Tape ST1845K1
MORE INFO

ECCN (US):

EAR99

Country of Origin:

FRANCE

No availability of distributors reported, please contact our sales office
ST1845RKG
Active
9108/021/01R ESCC Flight true Flat-8 Gold Carrier Tape 9108/021/01R
MORE INFO

ECCN (US):

EAR99

Country of Origin:

FRANCE

No availability of distributors reported, please contact our sales office
ST1845RKT
Active
9108/021/02R ESCC Flight true Flat-8 Solder dip Carrier Tape 9108/021/02R
MORE INFO

ECCN (US):

EAR99

Country of Origin:

FRANCE

No availability of distributors reported, please contact our sales office

ST1845K1

Marketing Status

Active

SMD PIN/Detailed Spec

-

Quality Level

Engineering Model

EPPL

-

Hi-Rel Package

Flat-8

Lead Finish

Gold

Packing Type

Carrier Tape

Package: Product Marking

ST1845K1

ECCN (US)

EAR99

Country of Origin

FRANCE

ST1845RKG

Marketing Status

Active

SMD PIN/Detailed Spec

9108/021/01R

Quality Level

ESCC Flight

EPPL

true

Hi-Rel Package

Flat-8

Lead Finish

Gold

Packing Type

Carrier Tape

Package: Product Marking

9108/021/01R

ECCN (US)

EAR99

Country of Origin

FRANCE

ST1845RKT

Marketing Status

Active

SMD PIN/Detailed Spec

9108/021/02R

Quality Level

ESCC Flight

EPPL

true

Hi-Rel Package

Flat-8

Lead Finish

Solder dip

Packing Type

Carrier Tape

Package: Product Marking

9108/021/02R

ECCN (US)

EAR99

Country of Origin

FRANCE

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

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Related Applications

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS7312
      Rad-tolerant current mode PWM controller
      4.0
      1.38 MB
      PDF
      DS7312

      Rad-tolerant current mode PWM controller

    • Description Version Size Action
      TN1181
      Engineering Model quality level
      2.1
      371.75 KB
      PDF
      TN1181

      Engineering Model quality level

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
ST1845K1
Active
FLAT8 lead 8mm EM Industrial N/A
ST1845RKG
Active
FLAT8 lead 8mm FP Industrial N/A
ST1845RKT
Active
FLAT8 lead 8mm FP Industrial N/A

ST1845K1

Package:

FLAT8 lead 8mm EM

Material Declaration**:

Marketing Status

Active

Package

FLAT8 lead 8mm EM

Grade

Industrial

RoHS Compliance Grade

N/A

ST1845RKG

Package:

FLAT8 lead 8mm FP

Material Declaration**:

Marketing Status

Active

Package

FLAT8 lead 8mm FP

Grade

Industrial

RoHS Compliance Grade

N/A

ST1845RKT

Package:

FLAT8 lead 8mm FP

Material Declaration**:

Marketing Status

Active

Package

FLAT8 lead 8mm FP

Grade

Industrial

RoHS Compliance Grade

N/A

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.