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Overview
| Topology | Buck Converter |
| Input voltage | 90-265 V |
| Output 1 | 19.5 V / 3.33 A |
| IC revision | D |
Description
The LM5023 is a Quasi-Resonant Pulse Width Modulated (PWM) controller which contains all of the features needed to implement a highly efficient off-line power supply. The LM5023 uses the transformer auxiliary winding for demagnetization detection to ensure Critical Conduction Mode (CCM) operation. The LM5023 features a hiccup mode for over current protection with an auto restart to reduce the stress on the power components during an overload. A skip cycle mode which reduces power consumption at light loads for energy conservation applications (ENERGY STAR®, CEPCP, etc.). The LM5023 also uses the transformer auxiliary winding for output overvoltage (OVP) protection, if an OVP fault is detected the LM5023 latches off the controller.
Features
- Critical Conduction Mode
- Peak Current Mode Control Mode
- Skip Cycle Mode for Low Standby Power
- Hiccup Mode for Continuous Overload Protection
- Cycle-by-Cycle Over-Current Protection MaintainsAccuracy over the Universal AC Line
- Line Current Feed Forward
- OVP Protection by Sensing the Aux Winding
- Integrated 0.7 A Peak Gate Driver
- Direct Opto-Coupler Interface
- Leading Edge Blanking of Current Sense Signal
- Maximum Frequency Clamp 130 kHz
- Programmable Soft Start
- Thermal Shutdown
- 8-Pin MSOP Package
Typical applications
- Consumer Electronics
- Universal Input AC-DC Notebook Adapters 10 W to 65 W
- High Efficiency Housekeeping and Auxiliary Power
- Battery Chargers
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Product series | VIN | VOut1 (V) | IOut1 (A) | Vaux (V) | fswitch (kHz) | NPRI : NSEC : NAUX | ISAT (A) | Size | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC (mΩ) | IR (A) | L (µH) | RDC max. (mΩ) | VR (V (AC)) | VT (V (AC)) | Material | L (mm) | W (mm) | H (mm) | Mount | L1 (µH) | L2 (µH) | IR (A) | IR 2 (A) | ISAT (A) | RDC1 typ (Ω) | RDC2 typ (Ω) | RDC1 max (Ω) | RDC2 max (Ω) | fres (MHz) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 750315092 | SPEC | 5 files | MID-OLTI Offline Flyback Transformers for Texas Instruments | 85 - 265 V (AC) | 20 | 3.3 | 12 | 130 | 5.5:1:0.5 | 3.2 | RM10 | – | – | – | – | – | 200 | – | – | 2000 | – | 32.4 | 40 | 20.5 | THT | 200 | – | – | – | 3.2 | – | – | – | – | – | ||
 | 7448251201 | SPEC | 10 files | WE-CMB Common Mode Power Line Choke | – | – | – | – | – | – | – | XL | – | – | – | – | 12 | 1000 | 9 | 250 | 1500 | MnZn | 31 | 22 | 35 | THT | – | – | – | – | – | – | – | – | – | – | ||
 | 7443550230 | SPEC | 8 files | WE-HCI SMT Flat Wire High Current Inductor | – | – | – | – | – | – | – | 1350 | 23.8 | 7 | 17 | 3.7 | – | 2.3 | 3.96 | – | – | WE-PERM | 13 | 12.8 | 4.7 | SMT | – | – | – | – | – | – | – | – | – | 40 | ||
 | 744878100 | SPEC | 8 files | WE-DD SMT Shielded Coupled Inductor | – | – | – | – | – | – | 2 | 7332 | – | – | – | – | 1 | 10 | 150 | – | – | – | 7.3 | 7.3 | 4 | – | 10 | 10 | 1 | 1 | 2 | 0.125 | 0.125 | 0.15 | 0.15 | 30 |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 750315092 | SPEC | |
| 7448251201 | SPEC | |
| 7443550230 | SPEC | |
| 744878100 | SPEC |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Product series | VIN | VOut1 (V) | IOut1 (A) | Vaux (V) | fswitch (kHz) | NPRI : NSEC : NAUX | ISAT (A) | Size | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC (mΩ) | IR (A) | L (µH) | RDC max. (mΩ) | VR (V (AC)) | VT (V (AC)) | Material | L (mm) | W (mm) | H (mm) | Mount | L1 (µH) | L2 (µH) | IR (A) | IR 2 (A) | ISAT (A) | RDC1 typ (Ω) | RDC2 typ (Ω) | RDC1 max (Ω) | RDC2 max (Ω) | fres (MHz) | Samples |
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