ST1843：Rad-tolerant current mode PWM controller
The ST1843HR and ST1845HR ICs are rad-tolerant current mode PWM controllers providing an industry standard solution for the implementation of provides the off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count.
Its radiation hardness and hermetic packaging makes 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 and 100 krad (Si)
- SEL free @ 120 MeV/cm2/mg at 125°C
Product Specifications
Technical Notes & Articles
Selection Guides
Sample & Buy
| Part Number | SMD PIN/Detailed Spec | Quality Level | EPPL | Hi-Rel Package | Lead Finish | Packing Type | Package: Product Marking | ECCN (EU) | ECCN (US) | Country of Origin |
|---|
| ST1843K1 | - | Engineering Model | - | Flat-8 | Gold | Carrier Tape | ST1843K1 | NEC | EAR99 | FRANCE |
| ST1843FKG | - | According to ESCC | - | Flat-8 | Gold | Carrier Tape | ST1843FKG | NEC | EAR99 | FRANCE |
Quality & Reliability
| Part Number | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|
| ST1843K1 | FLAT8 lead 8mm EM | Industrial | N/A | |
| ST1843FKG | FLAT8 lead 8mm FP | Industrial | N/A | |
