LM5021MMX-1/NOPB
Power Management - Specialized
Technical Specifications
| Type | Description |
|---|---|
| Output Current | 0.7 A |
| Working Voltage V | 18.625 V |
| Switching Freq Hz | 145 kHz |
| Voltage - Breakdown | - |
| Duty Cycle(Max) | 80% |
| Feedback System | Secondary-Side Feedback |
| Working Mode | DCM;CCM |
| Type | Description |
|---|---|
| Operating Temp | -40°C ~ +125°C |
| Pd W | - |
| Topology | Flyback;Forward |
| Features | Over Voltage Protection;Short Circuit Protection;Overtemperature protection (OTP);Over Current Protection;Under Voltage Protection |
| Output Voltage | - |
| Package / Case | VSSOP-8-0.65mm |
Product Introduction
The LM5021 offline PWM controller contains all the features necessary to implement a high-efficiency offline single-ended flyback/forward power converter using current-mode control. The LM5021 features an ultra-low (25μA) startup current to minimize power dissipation in the high-voltage startup network. Skip-cycle mode reduces power consumption under light-load conditions, enabling energy-saving applications (ENERGY STAR, CECP, etc.). Additional features include undervoltage lockout, cycle-by-cycle current limiting, discontinuous mode overload protection, slope compensation, soft-start, and oscillator synchronization. This high-performance 8-pin IC has a total propagation delay of less than 100ns and allows the oscillator to be set to 1MHz with a single resistor.
Features
- Ultra-low startup current (25μA maximum)
- Current mode control
- Cycle-skip mode for reduced standby power
- Single-resistor programmable oscillator
- Synchronous oscillator
- Adjustable soft-start
- Integrated 0.7A peak current gate driver
- Direct optocoupler interface
- Maximum duty cycle limiting (80% for LM5021-1, 50% for LM5021-2)
- Slope compensation (LM5021-1 only)
- UVLO protection with hysteresis
- Cycle-by-cycle overcurrent protection
- Hiccup mode for sustained overload protection
- Leading-edge blanking of current sense signal
- Package: VSSOP-8 or PDIP-8
Applications
- - DCM/CCM flyback converters - Industrial power conversion - SMPS for smart meters and audio amplifiers - Building automation and white goods SMPS - Isolated telecom power supplies
Datasheet
Alternative Parts
Common LM5021MMX-1/NOPB alternatives overseas buyers search for:
Compliance & Export Codes
| Type | Details |
|---|---|
| RoHS | ROHS3 |
| ECCN | EAR99 |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| Type | Details |
|---|---|
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |
Sourcing Information
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