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STMicroelectronics STCH03 | Demoboard STEVAL-USBPD27S
Offline PWM controller for low standby adapters
Overview
| Topology | Flyback Converter |
| Input voltage | 245 V |
| Switching frequency | 145-196 kHz |
| IC revision | 1 |
Description
The STCH03 current-mode controller is designed for an offline quasi-resonant ZVS (zerovoltage-switching at switch turn-on) flyback converter. It combines a high-performance low-voltage PWM controller chip and a 650V HV start-upcell in the same package.The device features a unique characteristic: it is capable of providing constant output current (CC) regulation using primary-sensing feedback. This eliminates the need fordedicated current reference IC, as well as the current sensor, still maintaining quite accurate output current regulation.The quasi-resonant operation is achieved by means of a transformer demagnetization sensing input that triggers the turn-on of the MOSFET, connected on the ZCD pin. This inputserves also as both output voltage monitor, to achieve mains-independent CC regulation (line voltage feedforward), and to implement OVP and UVP.
Features
- Advanced power management for ultra-low standby power consumption (under 10 mW at 230 VAC)
- Fully integrated primary side constant current output regulation (CC)
- 650 V embedded HV start-up circuit with zero power consumption.
- Quasi-resonant (QR) zero-voltage-switching (ZVS) operation
- Accurate and adjustable output OVP with options auto-restart (STCH03) or latched (STCH03L) after fault
- Output undervoltage protection (UVP) with auto-restart
- Input voltage feedforward compensation for mains-independent CC regulation
- Embedded thermal shutdown
- Intelligent frequency jitter for EMI suppression
- SO8 package
Typical applications
- Quick charger
- AC-DC chargers for smartphones, tablets, camcorders and other handheld equipment
- AC/DC adapters for STB, notebooks and auxiliary power supplies
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | Tol. C | VR(V (DC)) | Size | Operating Temperature | DF(%) | RISO | L(mm) | W(mm) | H(mm) | Fl(mm) | Ceramic Type | Packaging | Qmin. | Q(%) | L(µH) | IR(mA) | ISAT,10%(A) | fres(MHz) | Version | VIN | VOut1(V) | IOut1(A) | Vaux(V) | ISAT(A) | VT(V (AC)) | fswitch(kHz) | NPRI : NSEC : NAUX | Mount | Interface Type | Gender | Pins | PCB Thickness(mm) | Working Voltage(V (DC)) | G(mm) | Z @ 100 MHz(Ω) | Zmax(Ω) | Test Condition Zmax | IR 2(mA) | RDC max.(Ω) | Type | VRMS(V) | VDC(V) | VBR(V) | IPeak(A) | Wmax(J) | PDiss(W) | VDE Approval | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WCAP-CSGP MLCCs 50 V(DC), 150 pF, ±10% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | Capacitance150 pF | Capacitance±10% | Rated Voltage50 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor2.5 % | Insulation Resistance10 GΩ | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | Ceramic TypeX7R Class II | Packaging7" Tape & Reel | Q-Factor [1]600 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), 220 pF, ±10% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | Capacitance220 pF | Capacitance±10% | Rated Voltage50 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor2.5 % | Insulation Resistance10 GΩ | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | Ceramic TypeX7R Class II | Packaging7" Tape & Reel | Q-Factor [1]600 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 25 V(DC), 330 pF, ±10% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 25 V(DC) | Capacitance330 pF | Capacitance±10% | Rated Voltage25 V (DC) | Size0402 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor3.5 % | Insulation Resistance10 GΩ | Length1 mm | Width0.5 mm | Height0.5 mm | Pad Dimension0.25 mm | Ceramic TypeX7R Class II | Packaging7" Tape & Reel | Q-Factor [1]600 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), 470 pF, ±5% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | Capacitance470 pF | Capacitance±5% | Rated Voltage50 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | – | Insulation Resistance10 GΩ | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | Ceramic TypeNP0 Class I | Packaging7" Tape & Reel | – | Q-Factor1000 % | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 100 V(DC), 1 nF, ±10% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 100 V(DC) | Capacitance1 nF | Capacitance±10% | Rated Voltage100 V (DC) | Size0805 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor2.5 % | Insulation Resistance10 GΩ | Length2 mm | Width1.25 mm | Height0.8 mm | Pad Dimension0.5 mm | Ceramic TypeX7R Class II | Packaging7" Tape & Reel | Q-Factor [1]600 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
 | WCAP-CSMH Mid and High Voltage, 1 nF, ±10% | Downloads8 files | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSMH Mid and High Voltage | Capacitance1 nF | Capacitance±10% | Rated Voltage1000 V (DC) | Size1206 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor2.5 % | Insulation Resistance10 GΩ | Length3.2 mm | Width1.6 mm | Height1.25 mm | Pad Dimension0.6 mm | Ceramic TypeX7R Class II | Packaging7" Tape & Reel | – | Q-Factor600 % | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||
| WCAP-CSGP MLCCs 10 V(DC), 6.8 nF, ±10% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 10 V(DC) | Capacitance6.8 nF | Capacitance±10% | Rated Voltage10 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor5 % | Insulation Resistance10 GΩ | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | Ceramic TypeX7R Class II | Packaging7" Tape & Reel | Q-Factor [1]600 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 10 V(DC), 10 nF, ±10% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 10 V(DC) | Capacitance10 nF | Capacitance±10% | Rated Voltage10 V (DC) | Size0402 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor5 % | Insulation Resistance10 GΩ | Length1 mm | Width0.5 mm | Height0.5 mm | Pad Dimension0.25 mm | Ceramic TypeX7R Class II | Packaging7" Tape & Reel | Q-Factor [1]600 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), 33 nF, ±10% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | Capacitance33 nF | Capacitance±10% | Rated Voltage50 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor2.5 % | Insulation Resistance10 GΩ | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | Ceramic TypeX7R Class II | Packaging7" Tape & Reel | Q-Factor [1]600 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 10 V(DC), 100 nF, ±20% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 10 V(DC) | Capacitance100 nF | Capacitance±20% | Rated Voltage10 V (DC) | Size0402 | Operating Temperature -55 °C up to +85 °C | Dissipation Factor5 % | Insulation Resistance5 GΩ | Length1 mm | Width0.5 mm | Height0.5 mm | Pad Dimension0.25 mm | Ceramic TypeX5R Class II | Packaging7" Tape & Reel | Q-Factor [1]600 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 25 V(DC), 100 nF, ±20% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 25 V(DC) | Capacitance100 nF | Capacitance±20% | Rated Voltage25 V (DC) | Size0402 | Operating Temperature -55 °C up to +85 °C | Dissipation Factor10 % | Insulation Resistance5 GΩ | Length1 mm | Width0.5 mm | Height0.5 mm | Pad Dimension0.25 mm | Ceramic TypeX5R Class II | Packaging7" Tape & Reel | Q-Factor [1]600 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), 100 nF, ±10% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | Capacitance100 nF | Capacitance±10% | Rated Voltage50 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor3 % | Insulation Resistance5 GΩ | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | Ceramic TypeX7R Class II | Packaging7" Tape & Reel | Q-Factor [1]600 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 10 V(DC), 220 nF, ±20% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 10 V(DC) | Capacitance220 nF | Capacitance±20% | Rated Voltage10 V (DC) | Size0402 | Operating Temperature -55 °C up to +85 °C | Dissipation Factor5 % | Insulation Resistance2.3 GΩ | Length1 mm | Width0.5 mm | Height0.5 mm | Pad Dimension0.25 mm | Ceramic TypeX5R Class II | Packaging7" Tape & Reel | Q-Factor [1]600 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 25 V(DC), 1 µF, ±20% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 25 V(DC) | Capacitance1 µF | Capacitance±20% | Rated Voltage25 V (DC) | Size0603 | Operating Temperature -55 °C up to +85 °C | Dissipation Factor10 % | Insulation Resistance0.5 GΩ | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | Ceramic TypeX5R Class II | Packaging7" Tape & Reel | Q-Factor [1]600 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 25 V(DC), 1 µF, ±10% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 25 V(DC) | Capacitance1 µF | Capacitance±10% | Rated Voltage25 V (DC) | Size0805 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor5 % | Insulation Resistance0.5 GΩ | Length2 mm | Width1.25 mm | Height1.25 mm | Pad Dimension0.5 mm | Ceramic TypeX7R Class II | Packaging7" Tape & Reel | Q-Factor [1]600 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
 | WCAP-CSST Soft Termination, 2.2 µF, ±10% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSST Soft Termination | Capacitance2.2 µF | Capacitance±10% | Rated Voltage100 V (DC) | Size1210 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor5 % | Insulation Resistance0.05 GΩ | Length3.2 mm | Width2.5 mm | Height2.5 mm | Pad Dimension0.75 mm | Ceramic TypeX7R Class II | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | ||||
| WCAP-CSGP MLCCs 10 V(DC), 4.7 µF, ±20% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 10 V(DC) | Capacitance4.7 µF | Capacitance±20% | Rated Voltage10 V (DC) | Size0603 | Operating Temperature -55 °C up to +85 °C | Dissipation Factor10 % | Insulation Resistance0.02 GΩ | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | Ceramic TypeX5R Class II | Packaging7" Tape & Reel | Q-Factor [1]600 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), 4.7 µF, ±10% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | Capacitance4.7 µF | Capacitance±10% | Rated Voltage50 V (DC) | Size1206 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor10 % | Insulation Resistance0.02 GΩ | Length3.2 mm | Width1.6 mm | Height1.6 mm | Pad Dimension0.5 mm | Ceramic TypeX7R Class II | Packaging7" Tape & Reel | Q-Factor [1]600 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 10 V(DC), 22 µF, ±20% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 10 V(DC) | Capacitance22 µF | Capacitance±20% | Rated Voltage10 V (DC) | Size0805 | Operating Temperature -55 °C up to +85 °C | Dissipation Factor10 % | Insulation Resistance0.005 GΩ | Length2 mm | Width1.25 mm | Height1.25 mm | Pad Dimension0.5 mm | Ceramic TypeX5R Class II | Packaging7" Tape & Reel | Q-Factor [1]600 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 25 V(DC), 22 µF, ±20% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 25 V(DC) | Capacitance22 µF | Capacitance±20% | Rated Voltage25 V (DC) | Size1210 | Operating Temperature -55 °C up to +85 °C | Dissipation Factor10 % | Insulation Resistance0.005 GΩ | Length3.2 mm | Width2.5 mm | Height2.5 mm | Pad Dimension0.6 mm | Ceramic TypeX5R Class II | Packaging7" Tape & Reel | Q-Factor [1]600 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
 | WE-CBF SMT EMI Suppression Ferrite Bead, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | Size0402 | Operating Temperature -55 °C up to +125 °C | – | – | Length1 mm | Width0.5 mm | Height0.5 mm | Pad Dimension0.25 mm | – | – | – | – | – | Rated Current250 mA | – | – | VersionSMT | – | – | – | – | – | – | – | – | MountSMT | – | – | – | – | – | – | Impedance @ 100 MHz470 Ω | Maximum Impedance1200 Ω | Maximum Impedance300 MHz | Rated Current 2620 mA | DC Resistance0.45 Ω | TypeHigh Speed | – | – | – | – | – | – | – | ||||
 | WE-VD Disk Varistor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-VD Disk Varistor | – | – | – | Size7 mm | Operating Temperature -40 °C up to +105 °C | – | – | Length9 mm | Width3.9 mm | Height12.5 mm | – | – | – | – | – | – | – | – | – | VersionTHT | – | – | – | – | – | – | – | – | MountTHT | – | – | – | – | – | – | – | – | – | – | – | – | AC Operating Voltage275 V | DC Operating Voltage350 V | (Reverse) Breakdown Voltage430 V | (Reverse) Peak Pulse Current1200 A | Energy Absorption33 J | Power Dissipation0.25 W | VDE ApprovalYes | ||||
 | WE-TI Radial Leaded Wire Wound Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TI Radial Leaded Wire Wound Inductor | – | – | – | Size5075 | Operating Temperature -40 °C up to +125 °C | – | – | Length6 mm | Width6 mm | Height8.5 mm | – | – | – | – | – | Inductance470 µH | Rated Current350 mA | Saturation Current @ 10%0.4 A | Self Resonant Frequency3.4 MHz | VersionHeat Shrinking Tube | – | – | – | – | Saturation Current0.4 A | – | – | – | MountTHT | – | – | – | – | – | – | – | – | – | – | DC Resistance2.4 Ω | – | – | – | – | – | – | – | – | ||||
 | WR-USB Type C Connectors, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-USB Type C Connectors | – | – | – | – | Operating Temperature -40 °C up to +105 °C | – | Insulation Resistance1000 MΩ | – | – | – | – | – | PackagingTape and Reel | – | – | – | Rated Current5000 mA | – | – | – | – | – | – | – | – | – | – | – | MountTHR | Interface TypeType C | GenderReceptacle | Pins24 | PCB Thickness1.6 mm | Working Voltage48 V (DC) | Pin length1.9 mm | – | – | – | – | – | TypeHorizontal | – | – | – | – | – | – | – | |||
 | WR-PHD Pin Header - Single, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | – | – | – | – | Operating Temperature -40 °C up to +105 °C | – | Insulation Resistance1000 MΩ | Length10.16 mm | – | – | – | – | PackagingBag | – | – | – | Rated Current3000 mA | – | – | – | – | – | – | – | – | – | – | – | MountTHT | – | GenderPin Header | Pins4 | – | Working Voltage250 V (DC) | – | – | – | – | – | – | TypeStraight | – | – | – | – | – | – | – | |||
750318501 | Offline Transformer, –, – | Simulation– | Downloads– | Status Activei| Production is active. Expected lifetime: >10 years. | Product series Offline Transformer | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
 | WE-OLSTM Offline Flyback Transformers, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-OLSTM Offline Flyback Transformers | – | – | – | SizeRM8 | Operating Temperature -40 °C up to +125 °C | – | – | Length24.64 mm | Width24.64 mm | Height17.32 mm | – | – | – | – | – | Inductance150 µH | – | – | – | – | Input Voltage 85 - 265 V (AC) | Output Voltage 112 V | Output Current 12.25 A | Auxiliary Voltage12 V | Saturation Current4.8 A | Insulation Test Voltage4000 V (AC) | Switching Frequency 56 - 138 | Turns Ratio5:1:3.5 | MountTHT | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |