Features
- Electrically screened to DLA SMD # 5962-99558
- QML qualified per MIL-PRF-38535 Requirements
- Radiation environment
- Maximum total dose: 300 krad(SI)
- Vertical architecture provides low dose rate immunity
- DI RSG process provides latch-up immunity
- Low start-up current: 100µA (Typical)
- Fast propagation delay: 80ns (Typical)
- 12V to 30V operation
- 1A (peak) dual output drive capability
- 5.1V reference
- Undervoltage lockout
- Programmable soft-start
- Switching frequencies to 500kHz
- Latched overcurrent comparator with full cycle restart
- Programmable leading edge blanking circuit
Description
The radiation hardened HS-1825ARH, HS-1825AEH pulse width modulator is designed to be used in high-frequency switched-mode power supplies and can be used in either current-mode or voltage-mode. It is well suited for single-ended boost converter applications. Device features include a precision voltage reference, low power start-up circuit, high-frequency oscillator, wide-band error amplifier and fast current-limit comparator. The use of proprietary process capabilities and unique design techniques results in fast propagation delay times and high output current over a wide range of output voltages. Constructed with the Intersil radiation hardened Silicon Gate (RSG) Dielectric Isolation BiCMOS process, the HS-1825ARH, HS-1825AEH have been specifically designed to provide highly reliable performance when exposed to harsh radiation environments.
Parameters
| Attributes | Value |
|---|---|
| Rating | Space |
| Control Mode | Voltage, Peak Current Mode |
| Phases (Max) | 2 |
| No-Load Operating Current | 25 mA |
| Quiescent Current | 55µA |
| Supply Voltage (min) (V) | 12 - 12 |
| Supply Voltage (max) (V) | 30 - 30 |
| Switching Frequency (min) (kHz) | 10 |
| Switching Frequency (max) (kHz) | 3000 |
| Topology | Boost, Flyback, Forward, Full Bridge, Half Bridge, Push-Pull |
| VREF (V) | 5.1 |
| Temp. Range (°C) | -55 to +125°C |
| TID HDR (krad(Si)) | 300 |
| DSEE (MeV·cm2/mg) | 86.3 |
| Flow | RH Hermetic |
| Qualification Level | Class Q, Class V, EM |
| Die Sale Availability? | Yes |
| PROTO Availability? | Yes |
Applications
- Current or voltage mode switching power supplies
- Motor speed and direction control
Knowledge Base
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How can I SYNC (synchronize) the oscillator of the IS-1825, the HS-1825, or the ISL71823 series rad hard PWM controllers to an external clock?
Question: How can I SYNC (synchronize) the oscillator for these rad hard PWM controllers to an external clock? Answer: (This answer applies to the following Rad Hard PWM controllers: HS-1825AEH, HS-1825ARH, IS-1825ASRH, IS-1825BSEH, IS-1825BSRH, ISL71823ASRH and ISL71823BSRH) The normal oscillator frequency is set by choosing ...
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