NJM2815, NJM2816, NJW4119

New JRC provides 3 new power management products “NJM2815, NJM2816, NJW4119” that have entered into mass production. These power-supply ICs with built-in voltage correction function are available for USB charge.
[General Description]
In recent years, smart phones, tablet PCs and other portable equipment have been becoming increasingly intelligent, which makes the battery capacity bigger also. Conventionally charging these equipment by USB interface connection needs 500mA charging current. Recently the quick charging mobile equipment increases gradually, so needs high output charging current. But the charging current gets high, the resistance of the cable between the USB interface and mobile equipment will cause greater voltage drop. The charging voltage for these mobile equipment will not satisfy USB charging specification. To solve this problem, New JRC has developed 2 linear regulators NJM2815, NJM2816 and 1 switching regulator NJW4119, that have entered mass production already. You can choose the best suitable products depending on your purpose of use.
1. The high precision voltage correction function (NJM2815/NJM2816/NJW4119)
To correct the voltage drop from the cable between the USB interface and mobile equipment, we have developed 3 power-supply ICs with the high precision voltage correction function. This function has been applied for patent.
2. Built-in an Error Flag output function (NJM2815/NJM2816/NJW4119) and a Power Good output function (NJW4119)
When using the USB charge, if an exception error occurred, the Error Flag output function in 3 products will notify microprocessor immediately. Therefore the fail-safe reliability design will become easier. Moreover the Power Good function in NJW4119 will notify the status that output voltage reaches the setting value properly to the microprocessor.
3. Built-in constant current mode overcurrent protection circuit (NJW4119), that is set to the current value with flat temperature characteristic
Built-in overcurrent protection circuit can be set to constant current with flat temperature characteristic. Even if the ambient temperature changes, the setting current can be kept stable, so the circuit is not affected by temperature and well works.
All application equipment with USB interface: Car AV, Consumer Equipment etc. Applications according to output current capability:
  • NJM2815 (IO=1A All USB Applications)
  • NJM2816 (IO=1.5A The Quick Charging Smartphone etc.)
  • NJW4119 (IO=2.4A Tablet Terminal etc.)

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