STMicroelectronics STCMB1, Power Factor & PWM Controller, 20 V, 75 kHz 20-Pin, SO

Product overview and Technical data sheets
Legislation and Compliance
RoHS Certificate of Compliance
COO (Country of Origin): PH
Product Details

STMicroelectronics PWM Controller

The STMicroelectronics STCMB1 family is a 20V, 75kHz surface mount 20 pins PWM controller. This device is a transition mode (TM) PFC, a high voltage double-ended controller. It has an electrical rating of 800V with 6mA current. The PFC section uses a proprietary constant on-time control methodology that does not require a sinusoidal input reference, thereby reducing the system cost and external component count.

Features and Benefits

• Enhanced constant on-time PFC with input voltage feedforward, THD optimizer
• Half-bridge operation up to 750kHz with self-adjusting dead time
• Independent debug mode for both the converters
• It has a complete set of protection such as dc brown-out, two-level OCP, hard switching prevention (HSP) function for anti-capacitive mode protection and safe start-up
• It is LLC resonant combo controller
• Operation temperature ranges between -40°C and 85°C
• Proprietary time shift control for improved input ripple rejection and dynamic response
• Synchronous burst mode operation with PFC enhances light-load efficiency


• AC-DC adaptors
• LED street lighting
• SMPS for LED TVs

Attribute Value
Maximum Switching Frequency 75 kHz
Start-up Supply Current 100µA
Maximum Source Current 5mA
Maximum Sink Current 100mA
Maximum Supply Current 6 mA
Number of Outputs 1
Mounting Type Surface Mount
Package Type SO
Pin Count 20
Dimensions 13 x 7.6 x 2.35mm
Length 13mm
Width 7.6mm
Height 2.35mm
Maximum Operating Temperature +150 °C
Maximum Operating Supply Voltage 20 V
Minimum Operating Temperature -40 °C
Minimum Operating Supply Voltage 10 V
864 In stock for delivery within 3 working days
Price Each (In a Pack of 2)
Was HK$33.19
HK$ 24.945
(exc. GST)
Per unit
Per Pack*
2 - 8
10 +
*price indicative
Packaging Options:
Related Products
The CM87 can measure AC / DC current ...
The CM87 can measure AC / DC current and can also measure AC / DC voltage plus testing procedures for resistance, capacitance, frequency, duty cycle, type K thermocouple temperature, continuity and diode. Large size clamp meter with 57mm jawsTrue RMS ...
Floating, waterproof, easy to use with replaceable electrodes, ...
Floating, waterproof, easy to use with replaceable electrodes, these meters are a must have piece of measurement equipment. The HI-98311 and HI-98312 combine a sleek pocket sized design with accuracy.Featuring a large LCD display enabling users to read pH and ...
Timer Module Type 198 for PCB mount features ...
Timer Module Type 198 for PCB mount features a 6-digit LCD display and a wide voltage range.The module is extremely robust and suitable for many different applications thanks to its wide temperature range. Hour Meter Module with electrical resetDisplay range ...
RS Pro LX-105 is a great value, versatile, ...
RS Pro LX-105 is a great value, versatile, handheld luxmeter with detachable light cell. It can measure daylight, tungsten, fluorescent and mercury light intensity in either lux or foot-candles. Display hold function3 ranges/times coveredAuto power downRS-232 serial interfaceZero adjustmentDual LCD ...