NJW4814 Datasheet, PDF (1/16 Pages) New Japan Radio – Dual H-Bridge Driver with Boost Converter

NJW4814
Dual H-Bridge Driver with Boost Converter
GENERAL 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.
■ PACKAGE OUTLINE
NJW4814MLE
FEATURES
Boost Converter Block
H-Bridge Driver Block
Under Voltage Lockout
Built-in Thermal Shutdown
Standby Function
Package Outline
Output Switch Voltage
Switching Current
PWM Control
Operating Voltage Range
Oscillation Frequency Range
Soft Start Function
Over Current Protection
Over Voltage Protection
40V max.
1.5A min.
2.7 to 5.5V
380k to 1MHz
48ms typ.
Internal 2 Channel H-Bridge
Each Channel Operates Individually
Over Current Protection
Operating Voltage Range
Switching Frequency
Output Shut Down Control
Fault Indicator Output
300mA typ.
7.0 to 35V
300kHz max.
NJW4814MLE : EQFN24-LE
Ver.2015-04-07
-1-