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.
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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
Recommended for you
EDA Symbols, Footprints and 3D Models
STMicroelectronics - ST1845
Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.
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Symbols
Footprints
3D models
All resources
| Resource title | Version | Latest update |
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CAD Symbol & Footprint models (1)
| Resource title | Version | Latest update | ||
|---|---|---|---|---|
| ZIP | 1.0 | 08 Oct 2020 | 08 Oct 2020 |
Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| ST1845K1 | Active | Flat-8 | Industrial | N/A | |
| ST1845RKG | Active | Flat-8 | Industrial | N/A | |
| ST1845RKT | Active | Flat-8 | Industrial | N/A | |
ST1845K1
Package:
Flat-8Material Declaration**:
ST1845RKG
Package:
Flat-8Material Declaration**:
ST1845RKT
Package:
Flat-8Material Declaration**:
(**) 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 | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating Temperature (°C) (min) | Operating Temperature (°C) (max) | Package: Product Marking | SMD PIN/Detailed Spec | Quality Level | Lead Finish | |
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| ST1845K1 | | | distributors No availability of distributors reported, please contact our sales office |
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| ST1845RKG | | | distributors No availability of distributors reported, please contact our sales office |
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| ST1845RKT | | | distributors No availability of distributors reported, please contact our sales office |
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ST1845K1 Active
ST1845RKG Active
ST1845RKT Active
(*) 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