NC-Cap/super-QR/PSR-II^TM CV/CC Power Switch

FEATURES

◆   Built-in High Voltage Power BJT

◆   Proprietary NC-Cap/super-QR/PSR-II^TM (Quasi-Resonant & Primary Side Regulation) Control:

● ±4% CC and CV Precision

● Proprietary “Audio Noise Cancellation” Control

● Built-in “Fast Dynamic Response” Control to Meet USB Charge Requirements

● Proprietary “Zero-Output Startup” Control

● Proprietary “Smart Output Short Protection”

● without External Compensation/Filtering Capacitor Needed

●  Max. 50V Output for AC/DC LED Lighting

◆   Direct Drive of Low Cost BJT

◆   Proprietary Cable Drop Compensation

◆   Multi Mode Control

◆   Frequency Jitter for Better EMI

◆   Dynamic Base Drive for High Efficiency

◆   Wide VDD Operating Range

◆   10.8V UVLO Hysteresis Window

◆   Cycle-by-Cycle Current Limiting

◆   Leading Edge Blanking (LEB)

◆   Built-in Soft Start, Pin Floating Protection

◆   VDD UVLO, OVP, OLP, SCP

APPLICATIONS

◆   Battery chargers

◆   Replaces linear transformer and RCC SMPS

◆   Small power adapter

◆   AC/DC LED lighting

GENERAL DESCRIPTION

SF6038X is a high precision, highly integrated DCM (Discontinuous Conduction Mode) Primary Side Regulation (PSR) power switch for offline small power converter applications. It has built-in power BJT, which can further lower system cost. 

SF6038X has built-in proprietary NC-Cap/super-QR/PSR-II^TM control for CV control, which eliminates external compensation or filtering capacitor. It has built-in cable drop compensation function, which can provide excellent CV performance. The IC uses Multi Mode Control to improve efficiency and reliability and to decrease audio noise energy @ light loadings.

SF6038X integrates proprietary “Audio Noise Cancellation” control for audio noise free operation. The IC has built-in “Fast Dynamic Response” control to meet USB Charge requirements. SF6038X also integrates proprietary “Zero-Output Startup” control to achieve startup when output is near zero voltage. The IC has proprietary “Smart Output Short Protection”, which can protect the system with large leakage inductance when output is short circuit.

SF6038X integrates functions and protections of FB Short Protection, Under Voltage Lockout (UVLO), VDD Over Voltage Protection (VDD OVP), Output Over Load Protection (OLP), Output Short Circuit Protection (SCP), Soft Start, Cycle-by-cycle Current Limiting (OCP), Pin Floating Protection, VDD Clamping.

SF6038X is available SOP8 packages.

TYPICAL APPLICATION