NJW4138 Series
Internal 45V MOSFET Switching Regulator IC for Capacitor Charge Boost Converter
NJW4138 Series
Internal 45V MOSFET Switching Regulator IC for Capacitor Charge Boost Converter
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Description
The NJW4138 is a step up switching regulator with 45V, 1.75A power MOSFET. The NJW4138 has a current mode control, a high frequency oscillating over a wide operating voltage range and an internal phase compensation circuit, so that it provides boost applications with a few external parts. The NJW4138 has built-in overcurrent protection for Pulse-by-Pulse, it is suitable for charging the backup capacitor.
Applications
- Capacitor Charge
- Power supply for VFD
- Low power boost application
Spec
| Standard | |
|---|---|
| Input Voltage Range | 4.5 V to 40 V (45 V) |
| Operating Temperature Range | -40°C to 125°C |
| Supply Current | Typ. 3500 µA |
| Standby Current | 1 (max.) µA |
| Output Voltage Range | 4.5 V to 40 V |
| Output Voltage Accuracy | ± 1 % |
| Output Current | Switching Current 1750 mA |
| Oscillator Frequency | 2MHz typ. (C ver.) |
| Package | SOT-89-5-2 |
| Control | Current Mode Control / PWM Control |
| Function | Standby Function Soft Start Function (10ms typ.) Over Current Protection (Pulse-by-Pulse type) Thermal Shutdown Protection |
| Note | Built-in Compensation Circuit UVLO (Under Voltage Lockout) External Clock Synchronization Correspond to Ceramic Capacitor (MLCC) |
Protections / Functions
| TSD | OCP | OVP | UVLO | OVLO | Reverse | Shutdown | Soft Start | SSCG | PGOOD | Auto Discharge | Anti-ringing | Sequencing | Max Duty | Ext. Phase | LED Adjust |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Functional Description
| TSD | Thermal Shutdown Function |
|---|---|
| OCP | Overcurrent Protection Note: The function previously labeled as "ILX (LX Current Limit Function)" is now shown as "OCP." |
| OVP | Overvoltage Protection |
| UVLO | Undervoltage Lockout Protection |
| OVLO | Overvoltage Lockout Protection |
| Reverse | Reverse Current Protection Circuit |
| Shutdown | Shutdown Function |
| Soft Start | Soft Start Function |
| SSCG | Spread Spectrum Clock Generator Function |
| PGOOD | Power Good Output |
| Auto Discharge | Auto Discharge Function |
| Anti-ringing | Anti-ringing Switch Function |
| Sequencing | Start-up Sequencing Control |
| Max Duty | Maximum Duty Cycle |
| Ext. Phase | Externally Adjustable Phase Compensation |
| LED Adjust | LED High-speed Dimming Control |
Technical Documents
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Related Links
Quality & Packages
| Product Name | Compatibility | Package | Marking | Reliability |
|---|---|---|---|---|
| NJW4138U2-C |
|
SOT-89-5-2 | - | NJW-1-s-fr |
- Refer to the datasheets for the details on the product.
- The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
FAQ
Buy / Contact
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Purchase, Request for samples and documentsSales are made through distributors. Please contact your local distributors for any sales-related inquiry such as price.
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Available from 1 piece!Our electronic device products are available through our authorized online distributors.
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Technical Support
NJW4138 Series