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Texas Instruments TL3845P — Discrete Semiconductors

Texas Instruments TL3845P PWM Controller, 100kHz, 8-DIP

MPNTL3845P
End of Life

Texas Instruments Automotive, AEC-Q100 series PWM controller, TL3845P, step-up/step-down, boost/flyback/forward topology, 100kHz switching, 48% duty, 8-DIP through-hole, tube package.

$1.04Ref. price · indicative, final on quote
Texas Instruments TL3845P datasheet (PDF)
Packaging8-DIP (0.300", 7.62mm)
RoHSROHS3 Compliant
SeriesAutomotive, AEC-Q100
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

TL3845P specifications
ParameterValue
SeriesAutomotive, AEC-Q100
Output typeTransistor Driver
MountingThrough Hole
Voltage - supply (Vcc (Vdd))7.6V ~ 30V
Frequency100kHz
I/O channels1
Output phases1
Duty cycle48%
Operating temperature0°C ~ 70°C (TA)
PackageTube
FunctionStep-Up, Step-Up/Step-Down
TopologyBoost, Flyback, Forward Converter
Clock syncNo
Case8-DIP (0.300\", 7.62mm)
Control featuresFrequency Control
Output configurationPositive
Synchronous rectifierNo

Product details

PWM controller for isolated and non-isolated power stages

The TL3845P from Texas Instruments is a current-mode PWM controller that drives a single transistor output in boost, flyback, or forward converter topologies. Its 100 kHz fixed switching frequency and 48% maximum duty cycle suit it for medium-power DC-DC stages where isolation is handled by a transformer or optocoupler. The operating temperature range of 0°C to 70°C covers commercial and industrial indoor environments.

Automotive-grade qualification and lifecycle

Listed under the Automotive, AEC-Q100 series, the TL3845P carries the qualification for automotive-grade IC reliability, including temperature cycling and ESD sensitivity testing per JEDEC. This makes it suitable for under-hood or cabin electronics that demand PPAP-level traceability.

Package and board-fit for through-hole assembly

The tube packaging suits manual assembly or low-volume pick-and-place with a tube feeder. The single-output transistor driver provides a positive output configuration with frequency control via an external RC network. No clock synchronization or synchronous rectification is integrated, so the designer manages external rectification and switching noise filtering.

Frequently asked questions

Will TL3845P drop into a panel that was specified around UCC2806DWTR without rewiring?

No, the TL3845P will not drop into a panel specified for UCC2806DWTR without rewiring. The TL3845P is a single-output controller in an 8-DIP package, while the UCC2806DWTR is a dual-output controller in a surface-mount SOIC package. The pinouts, supply voltage range, and output configuration differ significantly. A board-level redesign is required.

What compliance documentation does Texas Instruments provide for TL3845P (RoHS, REACH, UL, IEC)?

Texas Instruments confirms the TL3845P is ROHS3 Compliant. No REACH, UL, or IEC certification is listed in the available documentation. For specific compliance certificates or declarations, request them at quote time.