DESCRIPTION

The MPX2003 is an all-in-one flyback controller

with an integrated primary driving circuit,

secondary controller, synchronous rectification

driver, and safety-compliant feedback. It offers

the benefits of both primary-side regulation (PSR)

and secondary-side regulation (SSR).

A feedback circuit is not required, which reduces

system complexity and the total BOM cost. The

synchronous rectifier (SR) can match the driving

signal of the primary-side MOSFET, meaning the

SR can operate safely in continuous conduction

mode (CCM). Meanwhile, the integrated SR

controller regulates the SR MOSFET at a low

threshold, which increases the overall efficiency

and design flexibility. An internal linear regulator

is integrated for the SR power supply, so the

MPX2003 can drive the low-side SR MOSFET

without auxiliary winding, even when the output

is low.

The MPX2003 can run in CCM under heavy

loads, then operate in quasi-resonant (QR)

mode when the load decreases. If the load drops

further, the MPX2003 works in pulse-frequency

modulation (PFM) mode. The switching

frequency (fSW) is fixed at 20kHz when the device

enters burst mode, which can prevent audible

noise. The MPX2003 achieves high efficiency

under most load conditions while improving

electromagnetic interference (EMI) performance.

The MPX2003 features advanced protections,

including VCC over-voltage protection (OVP),

primary over-current protection (POCP),

secondary-sense output overload protection

(OLP), internal brown-in/brownout (B/I, B/O),

short-circuit protection (SCP), current-sense

short protection (SSP), current-sense open

protection (SOP), SR gate open/short protection

(SGOP/SGSP), SRD abnormal protection

(SRDP), FB OVP and under-voltage protection

(UVP), internal thermal shutdown, under-voltage

lockout (UVLO), and an externally triggered

protection (Ext.P).

The MPX2003 is available in SOICW-16 and

TSOICW16-15 packages.

FEATURES

? Isolation Voltage >3750VAC

? 100% Production HIPOT Compliance

Testing

? UL1577 and IEC62368 Safety Approved,

DIN VDE V 0884-17 in Process

? Integrated Multi-Mode: Discontinuous

Conduction Mode (DCM), Quasi-Resonant

(QR) Mode, and Continuous Conduction

Mode (CCM)

? Flyback Controller, Secondary-Side

Synchronous Rectifier (SR) Sensing/Driving

Circuitry, and Safety-Compliant Feedback

Link

? Integrated 650V Primary-Side Current

Source and 150V Secondary-Side Current

Source

? Less than 30mW in Standby Mode

? Improved SR Control for Reliable Operation

and Higher Efficiency

? VCC Over-Voltage Protection (OVP), Primary

Over-Current Protection (POCP),

Secondary-Sense Output Overload

Protection (OLP), Internal BrownIn/Brownout (B/O, B/I), Short-Circuit

Protection (SCP), Current-Sense Short

Protection (SSP), Current-Sense Open

Protection (SOP), SR Gate Open/Short

Protection (SGOP/SGSP), SRD Abnormal

Protection (SRDP), FB OVP and UnderVoltage Protection (UVP), Internal Thermal

Shutdown, Under-Voltage Lockout (UVLO),

and an Externally Triggered Protection

(Ext.P)

? Available in TSOICW16-15 and SOICW-16

Packages

APPLICATIONS

? High-Performance USB PD Adapters

? Offline Battery Chargers

? High Efficiency, High-Current Power

Supplies