Document Number: MC34937 NXP Semiconductors Rev. 4.0, 4/2019 Data sheet: Technical Data Three phase field effect transistor 34937A pre-driver Industrial The 34937A is a field effect transistor (FET) pre-driver designed for three phase motor control and similar applications. The integrated circuit (IC) uses SMARTMOS technology. THREE PHASE PRE-DRIVER The IC contains three high-side FET pre-drivers and three low-side FET pre- drivers. Three external bootstrap capacitors provide gate charge to the high- side FETs. The IC interfaces to a MCU via six direct input control signals, an SPI port for device setup and asynchronous reset, enable, and interrupt signals. Both 5.0 V and 3.0 V logic level inputs are accepted and 5.0 V logic level outputs are provided. Features EK SUFFIX (Pb-FREE) Extended supply voltage operating range: 6.0 VV to 58 98ASA99334D Gate drive capability of 1.0 A to 2.5 A 54-PIN SOICW-EP Wide deadtime range (50 ns to 12 s) programmable via the SPI port Charge pump ensures sufficient external FET drive at low supply voltages Applications Device protection against reverse charge-injection from C and C of GD GS 1 2 V to 48 V 3-phase brushless DC (BLDC) motors external FETS and permanent magnet synchronous motors (PMSM) Integrated overcurrent, desaturation, and phase fault-detection E-Bike, hospital beds, electric scooters Immunity against positive or negative transient voltage spikes on the gate CPAPs, inflation pumps, industrial fans driver Portable power tools, commercial fans/blowers Current shoot-through protection built into deadtime control Small kitchen appliances Supports direct 3.3 V and 5.0 V logic interface to MCUs Integrated current sensing amplifier Device configuration and diagnostics through the SPI V SYS 34937 VPUMP VSUP PUMP PA HS G VPWR PB HS G PC HS G VLS VDD PA HS S VSS PB HS S PC HS S 3 PX HS 3 PX LS 3 PHASEX PA LS G CS PB LS G MCU SI PC LS G OR SCLK DSP SO PX LS S RST AMP P INT AMP N EN1 R SEN EN2 GND AMP OUT Figure 1. 34937A simplified application diagram 2019 NXP B.V.1 Orderable parts Table 1. Orderable part variations (1) Notes Temperature (T ) Package Part number A MC34937APEK -40 C to 125 C 54 SOICW-EP Notes 1. To order parts in tape & reel, add the R2 suffix to the part number. 34937A 2 NXP Semiconductors
