Dual H-Bridge Driver
NJW4814
Dual H-Bridge Driver with Boost Converter
GENERAL DESCRIPTION The NJW4814 is a dual H-bridge driver with boost...
Description
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-
NJW4814
PIN CONFIGURATION
OUTA1 PGND OUTB1 VDD_HB VOVP OUTB2
18 17 16 15 14 13
SW 19 PGND 20 RADJ 21
FB 22 RT 23 GND 24
12 OUTA2 11 PGND 10 FLT 9 INB2 8 INB1 7 INA2
123456
Exposed PAD on backside connect to GND
INA1 SHDNBb SHDNAb STBYb VDD_SW IN-
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