ROHM Manuals

This document describes the features and characteristics of the BD623xxx series DC brush motor drivers produced by ROHM. These drivers are full bridge drivers for brush motor applications, with selectable one channel or two channels configuration, VREF voltage setting pin for PWM duty control, cross-conduction prevention circuit, and four protection circuits. The product is suitable for applications such as VTR, CD/DVD players, audio-visual equipment, optical disc drives, PC peripherals, and OA equipment.

BD62321HFP is a full bridge driver for brush motor applications. This IC can operate at a wide range of power-supply voltages (from 6V to 32V), supporting output currents of up to 3A. MOS transistors in the output stage allow for PWM signal control. The replacement is also easy because of the pin compatible with BD623XHFP series.

This document describes H-bridge drivers for brush motor applications. Each IC can operate at a range of power supply voltages (from 3.0V to 5.5V), supporting output currents of up to 2A. MOS transistors in the output stage allow for PWM signal control, while the integrated VREF voltage control function of previous models offers direct replacement of deprecated motor driver ICs. These highly efficient H-bridge driver ICs facilitate low-power consumption design.

This datasheet introduces ROHM's 1ch spindle motor driver IC BA6859AFP-Y,BA6664FM,BD6671FM, including 3-phase full-wave pseudo-linear system, 180° electrifying direct PWM drive system, power saving, TSD (thermal shutdown), current limiting, Hall bias circuit, FG output, 3-phase component FG output, circuit direction detection function, reverse rotation prevention circuit, short brake pin, brake mode selection pin, DSP 3.3 V etc.

This document describes a half-wave motor driver for fan motor. It features a built-in reverse current protection diode and several absolute maximum ratings such as supply voltage, power dissipation, operating temperature, etc. The product also has characteristics like output current, AL signal output current and voltage, FG signal output current and voltage, etc.

BA6950FS, BA6951FS are reversible motor drivers that can directly drive forward and reverse rotations brushes motors. Motor rotating speed can be optionally set through the control terminal, and the motor can be driven at a constant speed by the built-in current feedback amplifier.

This product is a single motor reversible motor driver that can output 1.0A. The output mode can be set to four modes: normal, reverse, stop (idling), and braking according to the logic input (2 inputs).

The BA00DD0/CC0 series is a low-saturation regulator with a maximum output current of 2A/1A. The output voltage can be arbitrarily configured using the external resistance. These series of LDO regulators are offered in a broad packaging lineup. This IC has a built-in over-current protection circuit that prevents the destruction of the IC due to output short circuits and a thermal shutdown circuit that protects the IC from thermal damage due to overloading.

The BA3258HFP, BA33D15HFP, BA33D18HFP are fixed 2-output low-saturation regulators with a voltage accuracy at both outputs of ±2%. These series incorporate both overcurrent protection and thermal shutdown (TSD) circuits in order to prevent damage due to output short-circuiting and overloading, respectively. The features include output current capacity of 1A (BA3258HFP) and 0.5A (BA33D□□ Series), the ability to use a ceramic capacitor to prevent output oscillation (BA3258HFP), high ripple rejection (BA33D□□ Series). The applications include FPDs, TVs, PCs, DSPs in DVDs and CDs.

The BD3550HFN, BD3551HFN, and BD3552HFN are a series of high-performance regulator ICs designed for PCs. They feature ultra-low dropout and linear regulation, making them ideal for low input voltage to low output voltage applications. These ICs incorporate a built-in N-MOSFET power transistor to minimize the voltage differential and achieve high current output with reduced conversion loss. This eliminates the need for a switching regulator and its components, resulting in package profile downsizing and cost reduction.

BD3540NUV, BD3541NUV are low voltage output linear 1ch series chipset regulator ICs that operate from a very low input supply, and offer ideal performance in low input voltage to low output voltage applications. It incorporates a built-in N-MOSFET power transistor to minimize the input-to-output voltage differential to the ON resistance (RON=200mΩ～ 400mΩ) level. By lowering the dropout voltage in this way, the regulator realizes high current output (Iomax=0.5A～1.0A) with reduced conversion loss, and thereby obviates the switching regulator and its power transistor, choke coil, and rectifier diode. Thus, the BD3540NUV, BD3541NUV are designed to enable significant package profile downsizing and cost reduction. An external resistor allows the entire range of output voltage configurations between 0.65 and 2.7V, while the NRCS (soft start) function enables a controlled output voltage ramp-up, which can be programmed to whatever power supply sequence is required.

BD3539FVM/NUX is a termination regulator compatible with JEDEC DDR1-SDRAM, DDR2-SDRAM, DDR3-SDRAM which functions as a linear power supply incorporating an N-channel MOSFET and provides a sink/source current capability up to 1A respectively.

This is a specification document for the BD3538FVM model, a regulator IC for memory termination. The product features a built-in push-pull amplifier for termination (VTT), a built-in reference voltage circuit (VREF), and dual channels (DDR-Ⅱ). The absolute maximum ratings include input voltage, enable input voltage, termination input voltage, and VDDQ reference voltage. The operating conditions for the product include input voltage, termination input voltage, VDDQ reference voltage, and enable input voltage. Additionally, this product is designed for protection against radioactive rays.

BD3538F / HFN is a termination regulator compatible with JEDEC DDR-SDRAM, which functions as a linear power supply incorporating an N-channel MOSFET and provides a sink / source current capability up to 1A respectively. A built-in high-speed OP-AMP specially designed offers an excellent transient response. Requires 3.3 volts or 5.0 volts as a bias power supply to drive the N-channel MOSFET. Has an independent reference voltage input pin (VDDQ) and an independent feedback pin (VTTS) to maintain the accuracy in voltage required by JEDEC, and offers an excellent output voltage accuracy and load regulation. Also has a reference power supply output pin (VREF) for DDR-SDRAM or a memory controller. When EN pin turns to “Low”, VTT output becomes “Hi-Z” while VREF output is kept unchanged, compatible with “Self Refresh” state of DDR-SDRAM.