What are the key differences between UC3845B and UC3844B?

The UC3845B is designed for lower voltage applications with UVLO thresholds of 8.5V (on) and 7.6V (off), whereas the UC3844B has higher thresholds of 16V (on) and 10V (off).

What should be considered during PCB layout?

High-frequency layout techniques are critical. Use a ground plane, keep high-current loops short, and place compensation components close to the IC to minimize noise pickup.

Is this part suitable for automotive applications?

Yes, the NCV prefix (if applicable) and the wide operating temperature range (-40°C to +125°C) make it suitable for demanding environments.

What is the pinout of UC3845BVD1R2G?

Use the UC3845BVD1R2G datasheet for the official pinout diagram and pin names. In PartGenie, ask Datasheet AI about UC3845BVD1R2G pinout to locate pins, power rails, and interface signals before layout.

UC3845BVD1R2G Datasheet, Specs, Alternatives & ECAD | onsemi

AI summary

The UC3845BVD1R2G is a high-performance current-mode PWM controller from onsemi, optimized for DC-DC and off-line power supplies with lower voltage requirements.

Best for

DC-DC converters
Off-line power supplies
Automotive power management

Avoid if

Applications requiring high-voltage startup thresholds (use UC3844B instead)

Check before use

Timing component values (RT/CT)
Current sense resistor sizing

Key specifications

Switching Frequency: 500 kHz
UVLO (On): 8.5 V
Max Duty Cycle: 50%
Temp Range: -40°C to +125°C

Compliance & Environment

RoHS: ROHS3 Compliant
REACH: REACH Unaffected
MSL: 1 (Unlimited)
ECCN: EAR99
HTSUS: 8542.31.0001

Application

Power SupplyIndustrialAutomotive

Datasheet

ON-Semiconductor-company-79.pdf

800 KB

Datasheet AI

CAD Models

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PCB Footprint

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3D Model

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Where to Buy

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Alternative components

Alternatives are being enriched. Analyze this part in PartGenie for the latest matches.

Design and risk insights

Questions & answers

It is a fixed-frequency current-mode controller IC designed for efficient power supply designs, featuring a totem-pole output for driving MOSFETs.

AI summary

Best for

Avoid if

Check before use

Key specifications

Compliance & Environment

Application

Datasheet

CAD Models

Where to Buy

Alternative components

Design and risk insights

Questions & answers

What is the UC3845BVD1R2G?+×

What are the key differences between UC3845B and UC3844B?+×

What should be considered during PCB layout?+×

Is this part suitable for automotive applications?+×

What is the pinout of UC3845BVD1R2G?+×