MC34933EP

Document Number: MC34933 Freescale Semiconductor Rev. 3.0, 9/2014 Technical Data 1.4 A Dual H-Bridge Driver Compatible with 3.0 V Logic 34933 The 34933 is a two channel H-Bridge driver aimed at the digital camera market. There are a variety of applications containing bipolar step motors and/or brush DC motors, such as Auto Focus control for H-BRIDGE DRIVER the digital camera lens. The 34933 uses Freescale s proprietary SMARTMOS process to deliver a low-power device, with a maximum quiescent current of 100 A for the motor drive supply and 400 A for the control logic supply. The 34933 V supply operates from 2.0 V to 7.0 V using an internal M charge pump, with independent control of each H-Bridge driver via the MCU (IN1A, IN1B, IN2A, IN2B). The 34933 has a low total R of DS(on) 1.0 (max. at 25 C). Shoot-through current protection is a built-in feature for the 34933 device. EP SUFFIX (Pb-FREE) The 34933 has four operation modes: forward, reverse, brake, and 98ASA00717D tri-state (high-impedance). The 34933 employs a V detection circuit CC 16-PIN UQFN to sense when the logic supply switches to an off-state with a maximum current of 1.0 A to extend battery life. The H-Bridge drivers can be independently pulse width modulated up to 200 kHz for speed/ torque ORDERING INFORMATION and/or current control. Note that tri-state mode of H-Bridge drivers can Device occur when either V detect is low or the thermal detect is active. Temperature CC Package (For Tape and Reel, add an R2 Range (T ) A Suffix) Features MC34933EP -20 C to 85 C 16-UQFN Built-in 2-channel H-Bridge driver H-Bridge operation voltage 2.0 V to 7.0 V Max. load output current 1.0 A at T = 25 C A Low total R 0.8 (typ), 1.0 (max.) T = 25 C peak DS(ON) A Dual channel parallel driver, R 0.4 (typ.). max. DC current 1.4 A DS(ON) PWM control input frequency up to 200 kHz Built-in shoot-through current prevention circuit Built-in charge pump circuit (external cap type) V low voltage detection for logic power supply voltage CC Thermal detection for H-Bridge driver 3.0 V 5.0 V 34933 VCC VM1 VG VM2 OUT1A CH OUT1B CL IN1A IN1B MCU OUT2A Stepper IN2A M Motor OUT2B IN2B PGND1 PGND2 Figure 1. 34933 Simplified Application Diagram Freescale Semiconductor, Inc., 2012-2014. All rights reserved.INTERNAL BLOCK DIAGRAM INTERNAL BLOCK DIAGRAM VM VCC VG = VM+VCC VCC VG VCCdet VCC DETECTION CH CHARGE PUMP THERMAL DETECTION tdet CL VM1 VCCdet VCC VG VCC VCC High-side Driver tdet VCC OUT1A IN1A OUT1B IN1B LEVEL SHIFTER Low-side Driver CONTROL PRE-DRIVER LOGIC PGND1 VM2 IN2A High-side Driver IN2B OUT2A OUT2B Low-side Driver PGND2 * VM1 and VM2 are connected internally. Both VM1 and VM2 must be tied together on the PCB. PGND1 and PGND2 are connected internally. Both PGND1 and PGND2 must be tied together on the PCB. Figure 2. 34933 Simplified Internal Block Diagram 34933 Analog Integrated Circuit Device Data 2 Freescale Semiconductor