NJW4814MLE-TE1 Nisshinbo

NJW4814 Dual H-Bridge Driver with Boost Converter GENERAL DESCRIPTION PACKAGE OUTLINE 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. NJW4814MLE 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. FEATURES Boost Converter Block Output Switch Voltage 40V max. Switching Current 1.5A min. PWM Control Operating Voltage Range 2.7 to 5.5V 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. Operating Voltage Range 7.0 to 35V Switching Frequency 300kHz max. Output Shut Down Control Fault Indicator Output Under Voltage Lockout Built-in Thermal Shutdown Standby Function Package Outline NJW4814MLE : EQFN24-LE Ver.2015-04-07 - 1 - OUTA1 INA1 PGND SHDNBb OUTB1 SHDNAb VDD HB STBYb VOVP VDD SW OUTB2 IN- NJW4814 PIN CONFIGURATION PIN FUNCTION 1. IN- 13. OUTA1 18 17 16 15 14 13 2. VDD SW 14. PGND 3. STBYb 15. OUTB1 4. SHDNAb 16. VDD HB SW 19 12 OUTA2 5. SHDNBb 17. VOVP PGND 11 20 PGND 6. INA1 18. OUTB2 7. INA2 19. SW RADJ 10 21 FLT 8. INB1 20. PGND 9. INB2 21. RADJ 9 FB 22 INB2 10. FLT 22. FB 8 RT 23 INB1 11. PGND 23. RT 12. OUTA2 24. GND 7 GND 24 INA2 1 2 3 4 5 6 Exposed PAD on backside connect to GND < Top View> NJW4814MLE Ver.2015-04-07 - 2 -