BD6232FP-EVAL-N

ROHM Motor Driver IC Solutions Evaluation Board: H-Bridge Motor Drivers For DC Brush Motors No.0000000012 BD6212FP, BD6222FP, BD6232FP (2A / 5.5V, 15V, 32V) ●Introduction This application note will provide the steps necessary to operate and evaluate ROHM’s H-Bridge motor drivers using the BD62x2 evaluation board. DC brush motors are increasingly required for a broad range of applications. DC brush motor is preferred due to their simplicity, reliability and low cost. H-bridge driver ICs control the motor’s direction, speed, braking and idling. ●Description This evaluation board has been developed for ROHM’s H-Bridge driver customers evaluating the BD62x2FP series. The BD62x2FP series can operate across a wide range of power supply voltages (from 3V to 32V max), supporting output currents of up to 2A. PWM signal control (20 kHz-100 kHz) or VREF control modes are used to vary motor rotation speeds. ROHM’s ICs are complete with over current protection (OCP), over voltage protection (OVP), thermal shutdown (TSD) and under voltage lock out (UVLO) protection circuits while also facilitating a low-power consumption design (10µA max). Overlap (shoot-through) protection to prevent high currents during motor reversal or breaking is also built in. In addition, the devices are designed to withstand up to 4 kV ESD. ●H-Bridge Motor Driver Operation Modes a) Stand-by mode b) Forward mode c) Reverse mode d) Brake mode e) Forward PWM control mode f) Reverse PWM control mode g) Forward VREF control mode h) Reverse VREF control mode ●Applications VCR; CD/DVD players; A/V equipment; optical disc drives; PC peripherals; car audio; car navigation systems; office automation equipment ●Evaluation Board Operating Limits and Absolute Maximum Ratings Limit Parameter Symbol Unit MIN TYP MAX Conditions Supply Voltage BD6212 VCC 3 - 5.5 V BD6222 VCC 6 - 15 V BD6232 VCC 6 - 32 V BD6212 VREF 1.5 - 5.5 V BD6222 VREF 3 - 15 V BD6232 VREF 3 - 32 V Max.Output Current IOMAX - - 2 A VREF bias current IVREF -10 0 10 µA VREF = Vcc Output Frequency FPWM 20 25 35 kHz BD6212 / BD6222 / BD6232 => VREF = 3.75V / 9V / 18V FMAX 20 - 100 kHz FIN / RIN ISTBY - 0 10 µA Stand-by VREF Voltage Electrical Characteristics Input Range Carrier Frequency Stand-by current 1 Application Note ●Evaluation Board Schematic Below is the evaluation board schematic with the BD62x2 as U1 VCC VCC R5_JMP 0 R4_JMP 0 * Fin * Rin SW2 SPDT 1 2 20 19 VCC FIN OUT1 OUT1 RIN RNF RNF BD62X2 C3_DNI VCC SPDT C4_DNI 12 13 EXTERNAL SW1 U1 C2_DNI * While using PWM for speed control, the PWM signal can be connected to FIN or RIN inputs depending on the direction of rotation. Refer to the PWM mode description for the SW1/SW2 positions and jumper R4/R5 positions before feeding the PWM signal. OUT2 OUT2 VREF GND VCC VCC VCC 7 8 17 6 R3 R6_DNI 0 R1_DNI IC 0 C1_DNI BD6212, BD6222, BD6232 VCC VREF R2 SW4 SPDT 232221 C5 10uF C6_DNI DNI ------> DO NOT INSERT JMP ------> JUMPER Figure 1 ●Evaluation Board Labeling Scheme Below are the labeled pictures of a populated evaluation board and the picture of an unpopulated board for reference Figure 3 Figure 2 Page 2 of 8 Application Note ●Evaluation Board I/O Below is a diagram showing the inputs (Vcc, Vref, Rin, and Fin) and outputs (Out1 and Out2) of the evaluation board. Figure 4 ●Evaluation Board Operation Modes (Logic Table) Below is a truth table describing how to obtain the different modes of operations. Figure 5 ●H-Bridge Motor Driver Operation Modes The ranges of VCC and VREF will vary for different ICs as follows: IC BD6212FP BD6222FP BD6232FP VCC (V) 3 ~ 5.5 6 ~ 15 6 ~ 32 VREF (V) 1.5 ~5.5 3 ~ 15 3 ~ 32 I. Stand-by mode a) Both FIN and RIN are set to a low state (2V) and RIN is a low input (2V) and the output is independent of VREF in this state b) In brake mode all the internal circuits are still operating and this mode is used to quickly stop the motor. The power consumption in this mode is greater than the stand-by mode. Page 3 of 8 Application Note V. Forward PWM control mode a) VREF is connected to VCC and RIN is a low input (