| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
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7,232 pcs
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7232 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
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The UC1845A from Texas Instruments is a radiation-hardened current-mode PWM controller designed for demanding applications such as satellite buses and space launch vehicles. It is a pin-for-pin compatible version of the UC184x family, offering improved features for harsh environments.
Key electrical specifications include a low start-up current of less than 0.5 mA and a trimmed oscillator discharge current of 8.3 mA. The device supports operation up to 500 kHz and includes features like pulse-by-pulse current limiting and undervoltage lockout (UVLO) with hysteresis. It is qualified over the military temperature range of -55°C to 125°C.
The UC1845A is available in CDIP (JG) and LCCC (FK) packages, suitable for through-hole mounting. Its radiation-hardened nature makes it ideal for space and defense applications requiring reliable performance under extreme conditions.
This controller is optimized for DC-to-DC converter applications and supports various topologies including flyback, forward, buck, and boost converters.
| Qty | Low | High |
|---|---|---|
| 1+ | $0.78 | $0.78 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The maximum operating frequency is 500 kHz.
The operating temperature range is -55°C to 125°C.
It is available in CDIP (JG) and LCCC (FK) packages.
The start-up current is less than 0.5 mA.
Yes, for RHA device type 11, it is rad-hard to 30 krad (Si) total ionizing dose and functional to 45 krad at low dose rate.
The output can sink at least 10 mA at less than 1.2 V for VCC over 5 V.
Yes, the UCC2803-EP from Texas Instruments is an alternate part.
