ST1843

Active

Rad-tolerant current mode PWM controller

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Product overview

Description

The ST1843 and ST1845 ICs are rad-hard 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.
  • All 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 (<0.5 mA) and operating current
    • Ceramic hermetic package Flat-8 metallic lid floating
    • ST1843 50 krad (Si)
    • ST1845 100 krad (Si)
    • SEL free @ 120 MeV/cm2/mg at 125 °C
    • ESCC qualified as 9108/020 and 9108/021

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EDA Symbols, Footprints and 3D Models

STMicroelectronics - ST1843

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
ST1843FKG
Active
Flat-8 Industrial N/A
ST1843FKT
Active
Flat-8 Industrial N/A
ST1843K1
Active
Flat-8 Industrial N/A

ST1843FKG

Package:

Flat-8

Material Declaration**:

Marketing Status

Active

Package

Flat-8

Grade

Industrial

RoHS Compliance Grade

N/A

ST1843FKT

Package:

Flat-8

Material Declaration**:

Marketing Status

Active

Package

Flat-8

Grade

Industrial

RoHS Compliance Grade

N/A

ST1843K1

Package:

Flat-8

Material Declaration**:

Marketing Status

Active

Package

Flat-8

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.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) SMD PIN/Detailed Spec
Budgetary Price (US$)*/Qty
More info
min
max
ST1843K1 No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Carrier Tape Flat-8 - - -
MORE INFO

Quality Level:

ESCC Flight

Lead Finish:

Gold

Package: Product Marking:

ST1843K1

Country of Origin:

FRANCE

ST1843FKG No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Carrier Tape Flat-8 - - 9108/020/01F
MORE INFO

Quality Level:

ESCC Flight

Lead Finish:

Gold

Package: Product Marking:

9108/020/01F

Country of Origin:

FRANCE

ST1843FKT No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Carrier Tape Flat-8 - - 9108/020/02F
MORE INFO

Quality Level:

ESCC Flight

Lead Finish:

Solder dip

Package: Product Marking:

9108/020/02F

Country of Origin:

FRANCE

ST1843K1

Marketing Status

Active

ECCN (US)

EAR99

ECCN (EU)

NEC

Packing Type

Carrier Tape

Package

Flat-8

Operating Temperature (°C)

(min)

-

(max)

-

SMD PIN/Detailed Spec

-

Quality Level

ESCC Flight

Lead Finish

Gold

Package: Product Marking

ST1843K1

Country of Origin

FRANCE

ST1843FKG

Marketing Status

Active

ECCN (US)

EAR99

ECCN (EU)

NEC

Packing Type

Carrier Tape

Package

Flat-8

Operating Temperature (°C)

(min)

-

(max)

-

SMD PIN/Detailed Spec

9108/020/01F

Quality Level

ESCC Flight

Lead Finish

Gold

Package: Product Marking

9108/020/01F

Country of Origin

FRANCE

ST1843FKT

Marketing Status

Active

ECCN (US)

EAR99

ECCN (EU)

NEC

Packing Type

Carrier Tape

Package

Flat-8

Operating Temperature (°C)

(min)

-

(max)

-

SMD PIN/Detailed Spec

9108/020/02F

Quality Level

ESCC Flight

Lead Finish

Solder dip

Package: Product Marking

9108/020/02F

Country of Origin

FRANCE

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