A teardown of iRiver's H10 5 GByte MP3 player

Apple's iPod has become a synonym for MP3 player and dominates the global portable audio player stage with an estimated 70 percent market share. But there are choices for those who look for an alternative to carry their music around. Semiconductor Insights took a detailed look at the components of iRiver's iRiver H10 5 GByte MP3 player.

The iRiver H10 5 GByte MP3 player is the real challenger out there for Apple's mini lineup, or for that matter most of Apple's similar MP3 products at competing densities. The only design details that the H10 has similar to Apple is it's compelling 'look and feel' styling, as you can appreciate as soon as you pick up the H10. Not to be outdone, iRiver has also used touch control for the interface and ups the ante by including voice recording capabilities and FM radio. Although the mini has since been removed from Apple's MP3 Player line up, the iRiver H10 was a solid competitor to the best available MP3 player at the time.

The H10 recently won Semiconductor Insights' prestigious 2005 Insight Award for "Best MP3 Player Technology". The following outlines a detailed analysis of the various components used in iRiver's design of the H10 MP3 player.

The LTC4055 USB Power Controller and Li-Ion Charger from Linear Technology takes the lead role in the design win on the iRiver H10 under power control, with support from the Philips TEA1211 DC/DC converter. The LTC4055's main purpose is in monitoring and managing USB power through the system and charging the Li-Ion battery. On the USB front, the LTC4055 manages the current used via the USB peripheral during operation and battery charging functions. It also includes several power management features such as inrush current limiting, automatic battery switchover (when input supply is removed) undervoltage lockout and thermal shutdown. The LTC4055 also includes a complete constant-current/constant-voltage linear charger for single cell Li-Ion batteries.

iRiver's H10 uses the Wolfson Microelectronics WM8731 Audio CODEC to complete the audio capabilities. The WM8731 is ideal for both the MP3 functionality as well audio recording and playback, which is supported with stereo line and mono microphone level audio inputs. It boasts solid 24-bit sigma-delta ADCs and DACs with oversampling digital interpolation decimation filters included. To complete the audio experience, the WM8731 comes equipped with buffered stereo audio outputs (for driving headphones) as well as anti-thump mute and power up/down circuitry.

The iRiver H10 features two flash memory products, one from Silicon Storage Technology (SST) and the other from Samsung. The SST39VF800 from SST is one of three from the SST39VF family and is configured for 8 Mbit X 16 / 16 MByte. It is SST's CMOS Multi-Purpose Flash (MPF) manufactured with SST's proprietary high performance CMOS SuperFlash technology. The device uses a split-gate cell design and a thick oxide tunneling injector that allows SST to attain better reliability and manufacturability compared to other vendors. Possibly used in the H10 for program configuration and updating, the SST39VF800 uses less energy (power) during erase and program cycles, which is a well-balanced feature for use in portable products.

Samsung's role in the memory domain for this MP3 player is the K4S561633F - Mobile 4M X 16Bit X 4 Banks (256 Mbit / 32 MByte) SDRAM. Most likely used to store encoded bitstreams, the K4S561633F features a low-voltage supply with four-bank operation. Its synchronous design offers programmable burst length and latencies, which is useful for high bandwidth and high permanence systems.

Article content extracted from Semiconductor Insights' MP3 Player Design Win subscription service. Visit Semiconductor Insights at www.semiconductor.com.