NJW1280 Series
High Capacitance Piezo-sounder Driver with charge pump
Download Datasheet
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Description
NJW1280 is a driver for large-capacity piezo-sounder. With the built-in charge pump circuit and differential output, it is enabling to output 30Vpp with 5V single power supply, and can be configure a large-capacity 30nF piezo-sounder with four external capacitors. The operating voltage of NJW1280 is 2.0V to 5.5V, and it can be used with coin type batteries or Li-ion batteries. When not operating (no signal), the built-in input signal detection circuit automatically switches to the shutdown mode (0.5 µA max. at VDD=3V) to reduce battery consumption and realize a long service life of the set. The NJW1280 is available in a leaded MSOP10 package and a 2.3mm x 2.3mm size 0.397mm thick leadless DFN8-G2 package, which can be used for ultra-small wearable devices.
Applications
- Security Alarm
- Fire Alarm
- Smoke Detector
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Spec
Consumer Supply Voltage 2V to 5.5V Channel BTL 1ch. Input Signal PWM/PDM Output Voltage / Vom Typ. 30Vpp Output Voltage / V+ 5V Output Voltage / CL 30nF Stand-by Yes Operating Current - Active: (FIN = 4kHz, CPIEZO = 30nF) 3.5mA typ.- Shutdown 0.5µA max.) Wide Operating Temperature -40°C to 105°C Junction Temp. 150°C Package EQFN16-G2,MSOP10(TVSP10) Features Built in Charge Pump
30Vpp Differential OutputNote 1 Internal 3 times Charge pump Circuit Note 2 Piezo-Sounder Drive Capacity (30nF typ.) Protections / Functions
Stand-by Mute Fine Tune Sensitivity 
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Technical
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Quality &
PackagesProduct Name Compatibility Package Marking Reliability NJW1280MG2 EQFN16-G2 - NJW-1-s-r NJW1280RB2 MSOP10(TVSP10) - 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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Authorized Distributors
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