TB67H452FTG TOSHIBA CD Process Integrated Circuit Silicon Monolithic TB67H452FTG PWM Chopper Type 4 ch H-bridge Motor Driver The TB67H452FTG is a PWM chopper type 4 ch H-bridge motor driver. The TB67H452FTG can drive two steppers, two DC brushed motors and one stepping motor, etc. by combining 4 ch H-bridges. And it can also drive dual DC brushed motors or stepping motors for QFN48-P-0707-0.50 large-current drive by setting Large mode. Moreover, Weight: 0.137 g (typ.) VM power supply voltage can be used 6.3 V or more. Therefore, it is optimal for battery powered applications with 7.2 V power supply for example. Features Single-chip brushed DC motor driver for up to 4 motors Single-chip bipolar stepping motor driver for up to 2 motors Monolithic IC structured by CD process Low ON-resistance: Ron = 0.6 In Large mode, H-bridges can be combined. ON-resistance (Ron) = 0.3 . Over-current detection (ISD), thermal shutdown (TSD), and VM power-on reset circuits Since the IC incorporates a VCC regulator for internal circuit operation, an external logic power supply (5 V) is not required Package: QFN48 Maximum output withstand voltage: 40 V (max) Output current: 3.5 A (peak) in DC Motor (S) mode Chopping frequency can be set by external capacitor and resistor High-speed chopping is possible at 100 kHz or more 1 2017 TOSHIBA Corporation 2017-05-09 TB67H452FTG Block Diagram (Brushed DC motor (S) 4-ch mode) Xch IN1/IN2 SLEEP Xch PWM VMR Detect VCC VCC Voltage Step Decoder Regulator (MODE0) (Input Logic) (MODE1) (MODE2) Chopper OSC OSCM tBLANK set pin OSC ALERT Current Level Set Xch Vref input (Torque Control) (2 bit D/A) CR-CLK Converter Current Feedback (2) VM (VRS1) RS COMP1 RS X Output Control (VRS2) RS COMP2 (Mixed Decay Control) RS X ISD TSD Output Output (H-Bridge 2) (H-Bridge 2) VMR Detect VM Detection Circuit Note: Though pin functions are different depending on the used mode, they are indicated according to the DC(S) 4 mode in this document. Note: means the ellipsis of A, B, C, or D of each Ch. (Xch IN1/IN2, Xch PWM, Xch Vref input, and RS X) Note: Number of RS pins is 8 in total. Note: GND wiring: All the grounding wires of the TB67H452FTG should run on the solder mask on the PCB and be externally terminated at only one point. Also, a grounding method should be considered for efficient heat dissipation. In controlling the setting pins for each mode by SW, those pins should be pulled up to power supply like VCC or pulled down to GND not to go into a high-impedance (Hi-Z) state. Careful attention should be paid to the layout of the output, VM and GND traces, to avoid short circuits across output pins or to the power supply or ground. If such a short circuit occurs, the device may be permanently damaged. Also, the utmost care should be taken for pattern designing and implementation of the device since it has power supply pins (VM, RS, OUT, GND, etc.) through which a 2 2017-05-09