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PDF ST9902 Data sheet ( Hoja de datos )
| Número de pieza | ST9902 | |
| Descripción | Liquid-Crystal Shutter Glasses Driver | |
| Fabricantes | Sitronix | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ST9902 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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Preliminary
ST9902
Liquid-Crystal Shutter Glasses Driver
1. INTRODUCTION
ST9902 is an integrated circuit for liquid-crystal shutter glasses driver. It combines a DC/DC converter that generates a
specified voltage level as the output voltage source to the four-channel analog switches. Each analog switch has a
dedicated input control pin and a dedicated output analog pin. The analog switches can be used as the lens driver in a 3D
glasses system application. 16K-byte EEPROM is suitable for the MCU-based system, which can use EEPROM as a
code or data storage unit. ST9902 chip is integrated into a 16-pin QFN package and only a few external passive
components are required.
2. FEATURES
DC/DC Converter
♦ Input voltage: 2.5V to 4.2V
♦ High efficiency (max output current =100uA)
♦ Output voltage is 10V
Package and Operating Temperature Range
♦ 3mm x 3mm 16Pin QFN package
♦ Operating temperature range: 0~70℃
Analog Switch
♦ On-resistance match between four channels
♦ Low ON/OFF leakage current
♦ Vop support voltage = 10V
Control Interface
♦ I2C serial interface
♦ Up to 400KHz I2C bus compatibility
♦ Support power down control pin
16K-byte EEPROM
♦ Support byte program and page program
♦ 32 byte page buffer
♦ Self-timed programming cycle (6m sec max.)
♦ Endurance：300K write cycle
♦ Data retention time：more than 10 years
Sitronix Technology Corp. reserves the right to change the contents in this document without prior notice.
Ver 0.5
1/13
2012/05/03
1 page  
ST9902 - Preliminary
6. FUNCTIONS DESCRIPTION
DC/DC Converter
The device adopts the charge pump architecture because the power efficiency of the charge pump is suitable for 100uA
current loading application.
Capacitor Selection
For best performance, it is recommended that low ESR capacitors (ceramic or tantalum) be used for both VOUT and CCSP
to reduce noise and ripple. Increasing the size of VOUT capacitor will reduce output voltage ripple. The recommended
capacitors specification is illustrated in application circuit.
Layout Considerations
Careful of board layout is a must. For best performance, use very short path connections to all capacitors.
Analog Switch
The analog switch is a 4-output high-voltage liquid crystal lens driver. The VOUT support voltage is 10V. With the devices,
data transfers are done through the 4 parallel data bus. Please refer application circuit.
Power Management (nPWDN)
Sitronix recommends the following power control sequence to be implemented by MCU by using GPIO pin to control
nPWDN (SHUTDOWN). When nPWDN pin sets to low level means ST9902 in the power down mode for power saving,
nPWDN pin sets to high level for normal operation.
Ver 0.5
5/13 2012/05/03
5 Page 
ST9902 - Preliminary
9. Package Information
Ver 0.5
11/13
2012/05/03
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet ST9902.PDF ] | |
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