Integrated Circuits (ICs)

STCH03

Active

STMicroelectronics

CURRENT MODE PWM CONTROLLER 50MA 8-PIN SOIC TUBE

Deep-Dive with AI

Search across all available documentation for this part.

DocumentsDatasheet

Integrated Circuits (ICs)

STCH03

Active

STMicroelectronics

CURRENT MODE PWM CONTROLLER 50MA 8-PIN SOIC TUBE

Deep-Dive with AI

DocumentsDatasheet

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	STCH03

Duty Cycle	50 %
Fault Protection	Over Voltage, Over Current
Frequency - Switching	196 kHz
Internal Switch(s)	False
Mounting Type	Surface Mount
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	-25 °C
Output Isolation	Isolated
Package / Case	0.154 in
Package / Case	8-SOIC
Package / Case	3.9 mm
Supplier Device Package	8-SOIC
Topology	Flyback
Voltage - Start Up	17 V
Voltage - Supply (Vcc/Vdd) [Max]	23 V
Voltage - Supply (Vcc/Vdd) [Min]	11.5 V

STCH03 Series

45W / 12V power supply based on STCH03 QR flyback controller and SRK1000B adaptive synchronous rectification controller

Part	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Topology	Fault Protection	Duty Cycle	Frequency - Switching	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Start Up	Output Isolation	Package / Case	Package / Case	Package / Case	Supplier Device Package	Mounting Type	Outputs and Type	Outputs and Type	Power - Output	Supplied Contents	Board Type	Main Purpose	Current - Output	Voltage - Output	Contents	Regulator Topology	Voltage - Input [Min]	Voltage - Input [Max]	Utilized IC / Part
STMicroelectronics STCH03	11.5 V	23 V	Flyback	Over Current Over Voltage	50 %	196 kHz	125 °C	-25 °C	17 V	Isolated	0.154 in	8-SOIC	3.9 mm	8-SOIC	Surface Mount
STMicroelectronics STCH03LTR	11.5 V	23 V	Flyback	Over Current Over Voltage	50 %	196 kHz	125 °C	-25 °C	17 V	Isolated	0.154 in	8-SOIC	3.9 mm	8-SOIC	Surface Mount
STMicroelectronics EVAL-STCH03-45W						154 kHz										1 Isolated Output Isolated	1	45 W	Board(s)	Fully Populated	AC/DC Primary and Secondary Side	3.75 A	12 V	Board(s)	Flyback	90 VAC	265 VAC	STCH03
STMicroelectronics STCH03TR	11.5 V	23 V	Flyback	Over Current Over Voltage	50 %	196 kHz	125 °C	-25 °C	17 V	Isolated	0.154 in	8-SOIC	3.9 mm	8-SOIC	Surface Mount

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	N/A	1476	$ 3.24
	Tube	1	$ 1.39
		10	$ 1.01
		25	$ 0.92
		100	$ 0.82
		300	$ 0.76
		500	$ 0.74
		1000	$ 0.71
		2500	$ 0.69
		5000	$ 0.67

Description

General part information

STCH03 Series

The STCH03 current-mode controller is designed for an offline quasi-resonant ZVS (zero-voltage-switching at switch turn-on) flyback converter.

It combines a high-performance low-voltage PWM controller chip and a 650V HV start-up cell in the same package.

Constant output voltage (CV) regulation loop is achieved by secondary side feedback, the output voltage information is transfered via an optocoupler on the FB pin of the STCH03 to get the selected output voltage.

Documents

Technical documentation and resources