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
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Spec
Consumer 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 ProtectionNote Built-in Compensation Circuit
UVLO (Under Voltage Lockout)
External Clock Synchronization
Correspond to Ceramic Capacitor (MLCC)Protections / Functions
TSD ILX OCP OVP UVLO OVLO Reverse Shutdown Soft Start SSCG PGOOD Auto Discharge Anti-ringing Sequencing Max Duty Ext. Phase LED Adjust -
Technical
Documents-
Related Links
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Quality &
PackagesProduct 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.
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Sample / Buy
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Buy Online
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Buy, Request for Samples, Request for Information Materials
Authorized Distributors
Please contact your local distributors for any sales-related inquiry such as price, stock, delivery, etc.
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Functional Description
TSD | Thermal Shutdown Function |
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ILX | LX Current Limit Function |
OCP | Overcurrent Protection |
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 |