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Texas Instruments UC2845P — Analog & Data Acquisition

UC2845P PWM Controller, 48% Duty Cycle, 500kHz, 8-PDIP

MPNUC2845P
End of Life

UC2845P current-mode PWM controller, 8-DIP through hole, 48% max duty cycle, up to 500kHz switching, boost/buck/flyback/forward topologies, -40°C to 85°C, RoHS non-compliant.

$1.14Ref. price · indicative, final on quote
Texas Instruments UC2845P datasheet (PDF)
Packaging8-DIP (0.300", 7.62mm)
RoHSRoHS non-compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

UC2845P specifications
ParameterValue
Output typeTransistor Driver
MountingThrough Hole
Voltage - supply (Vcc (Vdd))12V ~ 28V
Frequency - switchingUp to 500kHz
I/O channels1
Output phases1
Duty cycle48%
Operating temperature-40°C ~ 85°C (TA)
PackageBulk
FunctionStep-Up, Step-Down, Step-Up/Step-Down
TopologyBoost, Buck, Flyback, Forward
Clock syncNo
Case8-DIP (0.300\", 7.62mm)
Control featuresFrequency Control
Output configurationPositive, Isolation Capable
Synchronous rectifierNo

Product details

UC2845P — current-mode PWM controller for single-ended topologies

The UC2845P is a current-mode PWM controller supporting boost, buck, flyback, and forward topologies. The 48% maximum duty cycle ensures transformer reset in single-ended forward converters. Switching frequency runs up to 500 kHz. Output is a single transistor driver with positive, isolation-capable configuration.

RoHS compliance — critical for EU and green-markets

That means it contains lead (Pb) in the solder finish or die attach, and cannot be used in products sold into EU RoHS jurisdictions without an exemption. For military, aerospace, or industrial applications with a RoHS waiver, the non-compliant status is acceptable and may even be preferred for reliability in high-temperature or high-vibration environments.

Housed in an 8-pin PDIP (0.300" width, 7.62 mm body) with through-hole mounting. The package is listed as Bulk.

Frequently asked questions

What is the maximum duty cycle of UC2845P?

The maximum duty cycle is 48%. This is a current-mode controller limit that prevents transformer saturation in single-ended topologies.

What is UC2845P's listed function?

The UC2845P functions as a step-up, step-down, and step-up/step-down PWM controller, supporting boost, buck, flyback, and forward converter topologies.