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Overview
| Topology | Buck Converter |
| Switching frequency | 200-2000 kHz |
Description
It is an LT Journal, Synchronous, Low EMI LED DriverFeatures Integrated Switches andInternal PWM Dimming
Features
±2% LED Current Regulation±2% Output Voltage Regulation5000:1 PWM Dimming at 100Hz128:1 Internal PWM DimmingSpread-Spectrum Frequency ModulationSilent Switcher® Architecture for Low EMIOperates in Boost, Buck Mode and Buck-Boost Mode2.8V to 36V Input Voltage RangeUp to 34V LED String Voltage2A, 40V Internal Switches200kHz to 2MHz with SYNC FunctionAnalog or Duty Cycle LED Current ControlOpen/Short LED Protection and Fault IndicationThermally Enhanced 28-Pin (4mm × 5mm) QFN
Typical applications
- Machine Vision
- Automotive and Industrial Lighting
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | L (µH) | IRP,40K (A) | ISAT (A) | Size | Version | ISAT,10% (A) | ISAT,30% (A) | Mount | Z @ 100 MHz (Ω) | Zmax (Ω) | Test Condition Zmax | IR 2 (A) | RDC max. (mΩ) | Type | L1 (µH) | L2 (µH) | IR (A) | ISAT (A) | RDC1 typ (Ω) | RDC2 typ (Ω) | RDC1 max (Ω) | RDC2 max (Ω) | fres (MHz) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 74437324047 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-LHMI SMT Power Inductor | 4.7 | 2.95 | – | 4020 | – | 2.45 | 5.4 | SMT | – | – | – | – | 105 | – | – | – | – | – | – | – | – | – | 31 | ||
 | 74477710 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PD SMT Power Inductor | 10 | 3.55 | 2.6 | 7345 | Standard | 2.6 | 3.2 | SMT | – | – | – | – | 49 | – | – | – | – | – | – | – | – | – | 26 | ||
 | 744877100 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-DD SMT Shielded Coupled Inductor | 10 | – | 2.8 | 7345 | – | – | – | – | – | – | – | 1.1 | 120 | Straight | 10 | 10 | 1.1 | 2.8 | 0.11 | 0.11 | 0.12 | 0.12 | 27 | ||
 | 7427920415 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | 0805 | SMT | – | – | SMT | 600 | 660 | 150 MHz | 1.5 | 300 | Wide Band | – | – | 0.5 | – | – | – | – | – | – | ||
| 742792040 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | 0805 | SMT | – | – | SMT | 600 | 700 | 150 MHz | 2 | 150 | High Current | 52000000 | – | 1.5 | – | – | – | – | – | – | ||
| 742792097 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | 0805 | SMT | – | – | SMT | 1500 | 1800 | 70 MHz | 1 | 300 | High Current | – | – | 0.7 | – | – | – | – | – | – | ||
| 750316134 | SPEC | – | – | Active i| Production is active. Expected lifetime: >10 years. | Power Transformer | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 74437324047 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | |
| 74477710 | SPEC | |
| 744877100 | SPEC | |
| 7427920415 | SPEC | |
| 742792040 | SPEC | |
| 742792097 | SPEC | |
| 750316134 | SPEC | – |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | L (µH) | IRP,40K (A) | ISAT (A) | Size | Version | ISAT,10% (A) | ISAT,30% (A) | Mount | Z @ 100 MHz (Ω) | Zmax (Ω) | Test Condition Zmax | IR 2 (A) | RDC max. (mΩ) | Type | L1 (µH) | L2 (µH) | IR (A) | ISAT (A) | RDC1 typ (Ω) | RDC2 typ (Ω) | RDC1 max (Ω) | RDC2 max (Ω) | fres (MHz) | Samples |
|---|