NJW1871A Series
MOSFET Drive Switching Regulator IC for Boost / Fly-Back Converter
NJW1871A Series
MOSFET Drive Switching Regulator IC for Boost / Fly-Back Converter
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Description
The NJW1871A is a MOSFET drive switching regulator IC for boost / fly-back converters that operates wide operating voltage range from 4.5V to 40V. The internal Nch MOSFET driver circuit provides high efficiency driving, makes this device ideal for high output current applications. The protection function is equipped with pulse-by-pulse overcurrent detection to limit the switching current at overload. Automatic recovery of switching is possible upon recovery of load abnormalities. In addition, the high transmit frequency support allows AM band noise avoidance and small inductors to be used. The NJW1871A is suitable for boost / fly-back applications such as automotive and industrial instruments and so on.
Applications
- Consumer Electronics
- Industrial Instruments
- Boost converter for small to middle range power supplies
Spec
| Standard | Automotive | |
|---|---|---|
| Input Voltage Range | 4.5 V to 40 V (45 V) | |
| Operating Temperature Range | -40°C to 125°C | |
| Supply Current | Typ. 1200 µA | Max. 1700 µA |
| Standby Current | 10 µA | Max. 20 µA |
| Output Voltage Accuracy | ± 1 % | ± 2 % |
| Oscillator Frequency | 1000kHz to 2000kHz | |
| Package | MSOP10(VSP10) | |
| Control | Current Mode Control / PWM Control | |
| Function | Standby Function Soft Start (Fixed 20ms typ.) Over Current Protection (Hiccup) Over Voltage Protection Thermal Shutdown |
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| Note | UVLO (Undervoltage Lockout) External Clock Synchronization Adjustable Startup Voltage |
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| AEC-Q100 | AEC-Q100 Grade 1 | |
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 |
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Functional Description
| TSD | Thermal Shutdown Function |
|---|---|
| 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 |
Technical Documents
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Related Links
Quality & Packages
| Product Name | Compatibility | Package | Marking | Reliability |
|---|---|---|---|---|
| NJW1871AR |
|
MSOP10(VSP10) | See datasheet | - |
| NJW1871AR-T1 |
|
MSOP10(VSP10) | See datasheet | - |
- 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
NJW1871A Series