STCMB1

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Transition mode (TM) PFC with X-cap discharge and LLC resonant combo controller

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  • The STCMB1 device embodies a transition mode (TM) PFC, a high voltage double-ended controller for LLC resonant half-bridge, an 800 V-rated high voltage section and the glue logic that supervises the operation of these three blocks.

    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.
    It includes also a complete set of protections: a cycle-by-cycle overcurrent (OCP), an output overvoltage (OVP), a feedback failure (FFP, latch-mode), an ac brown-out, boost inductor saturation and inrush current detection both at the start-up and after mains sags or missing cycles.
    The half-bridge (HB) section provides two complementary outputs that drive the high-side and low-side MOSFET 180° out-of-phase. The deadtime inserted between the turn-off of an either switch and the turn-on of the other is automatically adjusted to ensure zero voltage switching and higher efficiency from low to full load.
    A proprietary control method, timeshift control - TSC, improves dynamic behavior and input ripple rejection resulting in a cleaner output voltage.
    At the light-load the IC can be forced to enter a controlled burst mode operation where both the HB and the PFC work intermittently synchronized one to another. This helps to reduce the average switching frequency, thus keeping converter input consumption as low as possible.
    At the start-up, in addition to the traditional soft-start based on the frequency-shift, a proprietary hard switching prevention (HSP) function controls the half-bridge to prevent hard switching in the initial cycles. Additionally, the HSP function prevents the converter from working in or too close to the capacitive mode to ensure soft-switching.
    The HB is provided with a two-level OCP. The first level is with the frequency shift and delayed shutdown with an automatic restart. A fast shutdown with an automatic restart occurs if this first-level protection cannot limit the primary current. Finally, the device embeds the logic circuitry to coordinate the operation of the PFC, HB and HV start-up generator; in particular: the power-on/off sequencing, X-capacitor discharge, fault handling and synchronous burst mode operation. For the application debug purposes it is possible to externally disable one section at a time and have the other section working standalone.

    Key Features

    • Common features
      • SO20W package
      • 800 V high voltage start-up with integrated input voltage sensing
      • Active input filter capacitor discharge circuitry for reduced standby power compliant with IEC 62368-1 and UL Demko certified
      • Independent debug mode for both converters
    • PFC controller features
      • Enhanced constant on-time PFC with input voltage feedforward, THD optimizer
      • Complete set of protections: ac brown-in/out, inrush control, OVP, OCP, inductor saturation, feedback disconnection
    • LLC controller features
      • Proprietary timeshift control for improved input ripple rejection and dynamic response
      • Half-bridge operation up to 750 kHz with self-adjusting deadtime
      • Complete set of protections: dc brown-out, two-level OCP, hard switching prevention (HSP) function for anti-capacitive mode protection and safe start-up
      • Synchronous burst mode operation with PFC enhances light-load efficiency

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      EVLCMB1-90WADP

      Description:

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STMicroelectronics - STCMB1

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STCMB1
Active
SO-20 Industrial Ecopack2
STCMB1TR
Active
SO-20 Industrial Ecopack2

STCMB1

Package:

SO-20

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-20

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STCMB1TR

Package:

SO-20

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-20

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
STCMB1 Available at 3 distributors

Distributor availability ofSTCMB1

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 374 1 Order Now
RS COMPONENTS EUROPE 764 1 Order Now
MOUSER WORLDWIDE 400 1 Order Now

Distributor reported inventory date: 2020-11-29

Distributor Name

DIGIKEY

Stock

374

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

764

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

400

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-11-29

Buy Direct
Active
EAR99 NEC Tube SO-20 - - PHILIPPINES 1.337 / 1k
STCMB1TR Available at 3 distributors

Distributor availability ofSTCMB1TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 795 1 Order Now
AVNET AMERICA 1000 0 Order Now
MOUSER WORLDWIDE 1121 1 Order Now

Distributor reported inventory date: 2020-11-29

Distributor Name

DIGIKEY

Stock

795

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

1000

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

1121

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-11-29

Buy Direct
Active
EAR99 NEC Tape And Reel SO-20 - - PHILIPPINES 1.337 / 1k

STCMB1

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.337 / 1k

Distributor availability ofSTCMB1

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 374 1 Order Now
RS COMPONENTS EUROPE 764 1 Order Now
MOUSER WORLDWIDE 400 1 Order Now

Distributor reported inventory date: 2020-11-29

Distributor Name

DIGIKEY

Stock

374

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

764

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

400

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-11-29

ECCN (EU)

NEC

Packing Type

Tube

Package

SO-20

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

1.337 / 1k

Country of Origin

PHILIPPINES

STCMB1TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.337 / 1k

Distributor availability ofSTCMB1TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 795 1 Order Now
AVNET AMERICA 1000 0 Order Now
MOUSER WORLDWIDE 1121 1 Order Now

Distributor reported inventory date: 2020-11-29

Distributor Name

DIGIKEY

Stock

795

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

1000

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

1121

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-11-29

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SO-20

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

1.337 / 1k

Country of Origin

PHILIPPINES

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors