NJW4814 Series

Dual H-Bridge Driver with Boost Converter

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Description

The NJW4814 is a dual H-bridge driver with boost converter IC. It can boost the output voltage from Li-ion battery and/or a 5V power supply and drives a piezo device by two H- bridge drivers. 48ms of internal fixed soft start function of the boost circuit sets a limit to startup current. The dual H-bridge drivers have independent signal inputs and a fault output function, therefore the NJW4814 improves controllability from a microcomputer.The input frequency of H-bridge driver is up to 300kHz.

Spec

	Consumer
Channels	4(Half)
Output Rise/Fall Time	Typ. 400nsec / 340nsec
Structure	Bi-CMOS Technology
Wide Operating Temperature	-40℃ to +85℃
Junction Temp.	+150℃
Package	EQFN24-LE
Boost Converter	Block Output Switch Voltage (40V max.) Switching Current (1.5A min.) PWM Control Oscillation Frequency Range (380k to 1MHz) Soft Start Function (48ms typ.) Over Current Protection Over Voltage Protection
H-Bridge Driver Block	Internal 2 Channel H-Bridge Each Channel Operates Individually Over Current Protection (±300mA typ.) Switching Frequency (300kHz max.) Output Shut Down Control Fault Indicator Output
Note	Under Voltage Lockout Built-in Thermal Shutdown Standby Function

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UVLO	OCP	TSD	Reverse

Functional Description

Quality &
Packages

Product Name	Compatibility	Package	Marking	Reliability
NJW4814MLE		EQFN24-LE	-	NJW-1-s-r

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.

UVLO	Undervoltage Lockout Protection
OCP	Overcurrent Protection
TSD	Thermal Shutdown Function
Reverse Current Protection	Reverse Current Protection

	Sub Ctegory	Boost Converter
	No.of Circuit	4
	Drive Circuit	Half
	Supply Voltage min(V)	2.7
	Supply Voltage max(V)	5.5
	Output Peak Current typ(A)	±0.3
	Switching Current min(A)	1.5
	Switching Current (Boost) min (A)	1.5