Gas Detector Block Diagram

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GasDetector

Power Supply Block Transducer Operational Amplifier (Op-Amp.) Speaker Amplifier/Buzzer

(DC/DC) Power Supply Block

products Features
NJW1933 600mA,500kHz,Step-Down Switching Regulator in SOT23
R1245 1.2A 30V Input PWM Step-down DC/DC Converter
NJW4152A Switching Regulator IC for Buck Converter with 40V/1A or 40V/600mA MOSFET
NJW4152B Switching Regulator IC for Buck Converter with 40V/1A or 40V/600mA MOSFET
NJW4153 Switching Regulator IC for Buck Converter Current Mode Control with 40V/1A MOSFET
NJW4170 Current Mode Control High Speed Frequency Internal 1A MOSFET Switching Regulator IC for Buck Converter
RP509 0.5A/1A 6MHz PWM/VFM Step-down DC/DC Converter with Synchronous Rectifier
RM590 400mA Synchronous Step-down DC/DC Module with MODE pin and Inductor
RP402 PWM/VFM Step-up DC/DC Converter with Synchronous Rectifier
RP604 0.3µA IQ Low Quiescent Current 300mA Buck-Boost DC/DC Converter with Synchronous Rectifier
RP605 Low Power Consumption 300mA Buck-Boost DC/DC Converter with Battery Monitor

(LDO) Power Supply Block

products Features
NJM12877 LDO with Reverse Current Protection / Soft Start / Discharge Function
NJW4104 45V Io=200mA Ultra low Quiescent current LDO
NJW4182 High Voltage Ultra low current consumption Io=100mA LDO
RP118 100mA Low Supply Current 0.2µA LDO Regulator
RP122 Low Noise and Low Supply Current 400mA LDO Regulator
RP123 Low Noise and Low Supply Current 250mA LDO Regulator

(AFE) Transducer

products Features
NJU9101 Low Power Analog Front End
NJU9103 Analog Front End with High Gain PGA

(Op-Amp.) Operational Amplifier

products Features
NJU77552 1.7MHz, 50µA/ch, Excellent EMI Immunity, Rail-to-Rail Input/Output, Operational Amplifier

(Speaker Amplifier/Buzzer)

products Features
NJU7089 High-Power & Low-Voltage Audio Power Amplifier
NJU8759 Analog Signal Input Monaural Filter Less 3.0W Class-D Amplifier

(Piezo Buzzer Driver)

products Features
NJU72501 Piezo-sounder Driver with Multi-mode charge pump
NJW1280 High Capacitance Piezo-sounder Driver with charge pump