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U8700 AI Analysis:
Datasheet, Specs, Alternatives & ECAD

AI summary

U8700 product

U8700

MOSFETs - Single

offline flybackPWM controllerprimary-side regulationCC/CVSOT23-665 kHz

U8700 is a SOT23-6 offline flyback PWM controller for external MOSFETs, intended for adapter and charger designs requiring primary-side CC/CV or CV control.

Best for

  • Offline flyback adapters
  • Battery chargers
  • Primary-side controlled CC/CV supplies

Avoid if

  • A documented lifecycle or compliance status is mandatory
  • A controller with an integrated power MOSFET is required
  • The design cannot validate transformer and thermal behavior

Check before use

  • Verify SEL configuration for CC/CV versus CV mode
  • Set the CS resistor and transformer turns ratio for required current
  • Validate VDD auxiliary winding voltage below the OVP threshold

Key specifications

Switching frequency
65 kHz typical
Control modes
Primary-side CC/CV or CV
Constant-current reference
200 mV typical
VDD start / off
21 V / 9 V typical
Package
SOT23-6, 6 pins

Compliance & Environment

RoHS
-
REACH
-
MSL
-
ECCN
-
HTSUS
-

Application

Offline AC/DC adaptersBattery chargersGeneral flyback power supplies

Datasheet

b36e72dc489174a5039d8f84d2c90012_U8700.pdf

800 KB

Datasheet AI

CAD Models

Download ECAD models for U8700: KiCad symbol & footprint, Altium footprint, PCB footprint, and 3D model.

EDA Symbol
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PCB Footprint
Land pattern for PCB layout
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3D Model
STEP file for mechanical design
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KiCad Library
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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

U8700 is a current-mode offline flyback PWM controller from UNI-SEMIC. It drives an external MOSFET and supports primary-side constant-current/constant-voltage control or constant-voltage-only operation.