For the first time in the industry, ROHM develops an intelligent power
management LSI for portable DVD players with an integrated protective
function and power startup sequence

ROHM has recently completed development of the industry’s first 6ch. Power Management LSI (BD8611EFV) with an integrated protective function and startup sequence for portable DVD players. The new product will ensure high reliability for set systems used in battery-driven equipment including portable DVD players.

· Features

1. Integrated protective function for all output power supplies.
2. Integrated switching path function for power supply.
3. Detection of irregular outputs (rise or drop in supply voltage output, faulty startup sequence, over current, or parts detached)
4. Built-in startup sequence circuit
5. Incorporated 6ch variable power supplies adjusted by external resistors best suited for portable equipment.
6. Two-cell lithium-ion battery charging function.
   

Portable equipment such as DVD players or NAVI require multiple power supply voltages for main chip sets, (e.g. DSP), amplifiers, LCD panels, or drivers, which typically are built-up from independent power supply ICs or in combination with semi integrated power supply ICs with discrete protective circuits. Protective circuits for those power supplies are individually provided, however, if any of the power supplies malfunction, other circuits can be affected depending on system configurations. For example, the malfunction of a single circuit block causes other circuit blocks to malfunction leading to a fatal destruction of the whole set system.

The Power Management LSI (BD8611EFV) ROHM has recently developed, incorporates a 6ch power supply system and integrated protective circuit in a single chip providing protection of the system from various power supply failures while enhancing the reliability of system sets. BD8611EFV detects irregular rise or drop-in output voltages, failure in the startup sequence, shorted output, or disconnected parts of all systems resulting in shutting down all the systems even if the power supply process malfunctions. It also incorporates a power supply startup sequence.

Integrating a startup sequence is absolutely essential for the multi-block circuits and processor cores such as DSP and I/O which require different voltages (1.8V- I/O, 3.3V- DSP core) and sensitive power-up timing sequences, and BD9611EFV LSI allows a substantial reduction in the power system development phase enhancing system reliability.

ROHM offers an extensive lineup of intelligent power management LSIs including BD8611EFV with multi-power supply channel configuration voltages, output current, and packages applicable to portable equipment and circuits.

Sample delivery of BD8611EFV will start in March 2007 (at a sample price of 1,000 yen). Mass production will start in June 2007 at the rate of 800,000 pieces per month.

Production of the front-end process is implemented at ROHM Hamamatsu (Shizuoka Prefecture), and the subsequent process at ROHM Integrated Systems (THAILAND) CO., LTD.

· Glossary

• DSP (Digital Signal Processor):
  A processor specialized in the processing of digital signals.
• Sequence control:
  To exercise control in accordance with an entry schedule preset to achieve a specific objective in any given system.