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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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RT5002 датащи(PDF) 1 Page - Richtek Technology Corporation |
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RT5002 датащи(HTML) 1 Page - Richtek Technology Corporation |
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1 / 40 page  RT5002 1 DS5002-00 November 2011 www.richtek.com 7 + 1 Channel DC/DC PMU with Li-Ion Battery Charger for DSC General Description The RT5002 is a complete power supply solution for digital still cameras and other handheld devices. It includes a 7+1 channel DC/DC power converter unit, a single-cell Li- ion battery charger, and an I 2C control interface. The power converter unit includes one synchronous step- up converter and three synchronous step-down converters for DSP core, I/O, Motor, and memory power supply, one synchronous high voltage step-up converter and one asynchronous inverting converter for CCD ± bias, one WLED driver in either synchronous high voltage step-up or current source operation, and one low quiescent LDO for RTC application. All converters are internally frequency compensated and integrate power MOSFETs. The power converter unit provides complete protection functions: over current, thermal shutdown, over voltage, over-load, and under voltage protection. The battery charger includes Auto Power Path Management (APPM). No external MOSFETs are required. The charger enters sleep mode when power is removed. Charging tasks are optimized by using a control algorithm to vary the charge rate, including pre-charge mode, fast charge mode and constant voltage mode. The charge current can also be programmed with an external resistor and modified via the I 2C control interface. The scope that the battery regulation voltage can be modified via the I 2C interface depends on the battery temperature. The internal thermal feedback circuitry regulates the die temperature to optimize the charge rate for all ambient temperatures. The charging task will always be terminated in constant voltage mode when the charging current reduces to the termination current of 10% x ICHG_FAST. The charger includes under voltage and over-voltage protection for the supply input voltage, VIN. Features Power Converter Unit : One Channel LV Sync Step-Up and Three Channel LV Sync Step-Down Up to 95% Efficiency One Sync Step-Up and One Async Inverting for CCD ±±±±± bias One WLED Driver in either Sync Step-Up or Current Source Operation WLED Driver with Dimming Control Step-Up Mode with LED Open Protection (OVP7) One Low Quiescent LDO with Reverse Leakage Prevention for RTC Power Supply Preset On/Off Sequence of CH1, CH2, CH3, CH4 (1 → 3 → 4 → 2) Two Preset On/Off Sequence of CH5, CH6 (5 → 6 or 6 →5) All Power Switches Integrated with Internal Compensation All Step-Up Converters with Load Disconnect Wake Up Impulse to Monitor BAT and VIN Plug-In Charger Unit : 28V Maximum Rating for VIN Power Selectable Power Current Limit (0.1A / 0.5A / 1.5A) Auto Power Path Management (APPM) and Integrated Power MOSFETs Battery Charging Current Control Battery Regulation Voltage Control Programmable Charging Current and Safe Charge Timer Under Voltage and Over Voltage Protection Optimized Charge Rate via Thermal Feedback Interrupt Indicator to Fault/Status Events I 2C Control Interface : Support Fast Mode up to 400kb/s Voltage Divider for Sensing Battery Voltage Level Small 40-Lead WQFN Package RoHS Compliant and Halogen Free Applications DSC |
Аналогичный номер детали - RT5002 |
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Аналогичное описание - RT5002 |
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