MP4021A

MP4021A

NOT RECOMMENDED FOR NEW DESIGNS

Primary Side Control Offline LED Controller with Active PFC

ALTERNATIVE PART

NRFND Datasheet

MP4021A continues to be in production for existing customers. Please consider this alternative for new designs:

MP4027

High Performance, Primary Side Control, Offline LED Controller with Active PFC, NTC and PWM Dimming

Features & Benefits

Real-Current Control without Secondary-Feedback Circuit
<2% Line/Load Regulation
Current Fold back for Over Temperature (NTC)
PWM Dimming Available
High Power Factor (=0.9) over Universal Input Voltage
Boundary Conduction Mode for Improved Efficiency
Brown-Out Protection
Over-Voltage Protection
Short-Circuit Protection
Over-Temperature Protection
Primary-Side Over-Current Protection
Cycle-by-Cycle Current Limit
Input UVLO
Available in FCTSOT-8 Package

… and many more!

Parameters Description

Vac (min) (V)
85
Vac (max) (V)
305
Open LED Protection
Yes
Type
Flyback
Pout (max) (W) (Recommended)
40
Vfb (V)
0.4
fsw (max) (kHz)
333
Iq (mA)
0.75
Ishutdown (µA)
20
Sync
No
Grade
Catalog
Package (mm)
SOIC-8
Power Range Defined
No
Vin (max) (V)
431.3
Vin (min) (V)
120
Active PFC
Yes
Isolated
Yes
Isolated LLC
No
Isolated Flyback
No
Non-Isolated
No
Internal MOSFET
No
High Side Rectification
No
Low Side Rectification
No
Vin (max) (V) AC
305
Vin (min) (V) AC
85
Secondary Synchronous Rectification
No

The MP4021A is a primary-sidecontrol offline LED lighting controller that achieves high power factor and accurate LED current for isolated single-power-stage lighting applications in a single SOIC8 package. The proprietary real-current control method accurately controls LED current from primary-side information. Eliminating the secondary-side feedback components and the optocoupler significantly simplifies the LED lighting system design. The MP4021A integrates power factor correction and works in boundary conduction mode to reduce the MOSFET switching losses. The extremely low start-up current and quiescent current reduces the total power consumption and provides a high-efficiency solution for lighting applications. The multi-protection features of MP4021A greatly enhance system reliability and safety. The MP4021A features over-voltage protection, short-circuit protection, cycle-by-cycle current limiting, VCC UVLO, and auto-restart over-temperature protection.