SRK2001A

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Adaptive synchronous rectification controller for LLC resonant converter

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Product overview

Description

The SRK2001A controller implements a control scheme specific for secondary side synchronous rectification in LLC resonant converters that use a transformer with center tap secondary winding for full wave rectification. It provides two high current gate drive outputs, each capable of directly driving N-channel power MOSFET. Each gate driver is controlled separately, and an interlock logic circuit prevents the two synchronous rectifier MOSFET from conducting simultaneously.
The driver high-level voltage is clamped to 11 V in order to avoid delivering excessive gate charge to the SR MOSFET when the device is supplied at higher VCC voltages.
The control scheme ensures that each synchronous rectifier is switched ON as the corresponding half-winding starts conducting and OFF as its current falls to zero.
The turn-on logic with adaptive masking time (up to 10% of clock cycle) and innovative adaptive turn-off logic allow maximizing the conduction time of the SR MOSFET, eliminating the need for a parasitic inductance compensation circuit.
The low consumption mode of the device allows meeting the most stringent requirement for converter power consumption in light-load and no-load conditions.
A very low external component count required when using this device.
  • All features

    • Secondary side synchronous rectification controller optimized for LLC resonant converter
    • Dual gate driver for N-channel MOSFETs
    • Adaptive turn-off logic
    • Turn-on logic with adaptive masking time
    • Auto-compensation of parasitic inductance
    • Low consumption mode: 50 μA quiescent current
    • VCC operating voltage range 4.5 V to 32 V
    • High voltage drain-to-source Kelvin sensing for each SR MOSFET
    • Operating frequency up to 500 kHz
    • Programmable exit load levels from burst- mode
    • SSOP10 package

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STMicroelectronics - SRK2001A

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
SRK2001A
Active
SSOP 10 Industrial Ecopack2
SRK2001ATR
Active
SSOP 10 Industrial Ecopack2

SRK2001A

Package:

SSOP 10

Material Declaration**:

Marketing Status

Active

Package

SSOP 10

Grade

Industrial

RoHS Compliance Grade

Ecopack2

SRK2001ATR

Package:

SSOP 10

Material Declaration**:

Marketing Status

Active

Package

SSOP 10

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

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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
SRK2001ATR No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tape and Reel SSOP 10 - - CHINA
SRK2001A No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tube SSOP 10 - - CHINA

SRK2001ATR Active

Package:
SSOP 10
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

SRK2001ATR

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-

Max:

-

Country of Origin:

CHINA

No availability of distributors reported, please contact our sales office

SRK2001A Active

Package:
SSOP 10
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

SRK2001A

ECCN (EU):

NEC

Packing Type:

Tube

Operating Temperature (°C)

Min:

-

Max:

-

Country of Origin:

CHINA

No availability of distributors reported, please contact our sales office
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(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors