- Illumination and Lightning Products
- Power Products
- Audio-rerated Products
- Mobile Phones/Portable Equipment Products
- Products for LCDs
- Power Management Products
- PC/Peripheral Device Products
BD621□ / BD622□ / BD623□series
ROHM's easy-to-use high efficiency H-bridge drivers for DC brush motors enable speed control while driving by performing switching operations of the output MOSFETs via PWM conversion of speed setting voltage inputs.
■High efficiency PWM driving easily achieved
PWM conversion and output MOSFET switching are automatically performed by inputting a speed setting voltage. PWM values can also be input directly via FIN or RIN.
■Low ON-resistance FET with zero standby current
High efficiency motor drivers designed for ease of use
• Built-in output MOSFET with low ON-resistance
• Penetration current prevention circuit
• Zero standby current and standby malfunction prevention circuit
• Reduced circuit current
• Built-in output MOSFET with low ON-resistance
• Penetration current prevention circuit
• Zero standby current and standby malfunction prevention circuit
• Reduced circuit current
Multiple protection circuits and careful layout design ensures high reliability, while PWM drive reduces power consumption. The result is the optimal solution for virtually any application.
ROHM offers the most efficient, coolest class D speaker mplifiers on the market. Optimized for high performance compact equipment with limited space for adequate heat dissipation, ROHM Class D amps provide the ideal solution in a space efficient, energy saving design without sacrificing sound quality.
■ubstantial energy savings for speaker amplifiers
Cutting-edge BiCDMOS processes are used to minimize the output transistor ON-resistance and the wiring resistance, resulting in an industry-best efficiency of 91% (10W + 10W output, 8Ω load).
■No heat sinks or output LC filters required
ROHM’s 2.5W BD5460GUL and BD5461GUL utilize a unique filterless modulation method that eliminates the need for large, expensive output LC filters. Only three external parts are required, realizing significant parts and space savings.
Energy-saving Class D operation, combined with circuit optimization, has resulted in low 6.5mW power consumption for longer battery life, making ROHM’s Hi-fi digital input Class D headphone amps ideal for portable audio devices of all types.
ROHM's ultra-low saturation linear power supply controllers are optimized to provide a high level of precision and excellent responsiveness for power supplies required by chipsets. The external FET allows customization of the output current as well as the difference between the input and output voltages. Replace the multiple excessive switching power supplies prevalent in today’s inefficient PC systems with ROHM’s supply controller.
■Configure high efficiency power supplies comparable to switching systems
A 5V power supply that drives an external
N-channel FET results in ultra-low saturation with a remarkably low input/output voltage difference of 300mA (max. when Io = 10A). Power loss is minimized by lowering the input voltage, making it ideal for lower voltage PC chipsets.
■Safe operation with high-speed load response
Original control technology is utilized for the industry's best responsiveness. Suppresses voltage fluctuations and provides stable power supply to low voltage PC chipsets.
■Eliminate parts, beginning with switching power supplies
Conventional A Class power supplies often exhibit high saturated voltage and considerable heat generation during high current flow - reasons why switching power supplies are often used. However, ROHM offers a more efficient solution with its lineup of ultra-low saturation power supply controllers, featuring low heat generation (high efficiency) even during high current dray several Amperes). Additional advantages include a reduction in the number of parts required along with mounting area.
BU520□□series
Hall ICs enjoy widespread use due to their high sensitivity and low power consumption. ROHM utilizes Hall ICs not for constant sensing, but for detection within a fixed period, resulting in a current consumption of only 5µA (typ.). In addition, CMOS output minimizes power consumption during magnetic detection.
