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TPS61200 Datasheet(PDF) 11 Page - Texas Instruments |
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TPS61200 Datasheet(HTML) 11 Page - Texas Instruments |
11 / 33 page VOUT VIN Device Control GND Gate Control V FB Thermal Shutdown Oscillator UVLO FB PGND PGND PGND L Modulator PS Current Sensor VAUX VCC Control VOUT VCC EN TPS61200, TPS61201, TPS61202 www.ti.com SLVS577E – MARCH 2007 – REVISED DECEMBER 2014 10 Detailed Description 10.1 Overview The TPS6120x is a low input voltage synchronous boost converter family. The devices support 0.3-V to 5.5-V input voltage range, so can provide power supply solutions for products powered by either a single-cell, two-cell, or three-cell alkaline, NiCd or NiMH, or one-cell Li-Ion or Li-polymer battery. It is also used in fuel cell or solar cell powered devices where the capability of handling low input voltages is essential. The devices provide output currents of up to 600 mA at a 5-V output, while using a single-cell Li-Ion or Li-Polymer battery and discharges it down to 2.6 V. The boost converter is based on a fixed frequency, pulse-width-modulation (PWM) controller using synchronous rectification to obtain maximum efficiency. At low load currents, the converter enters the Power Save mode to maintain a high efficiency over a wide load current range. The Power Save mode can be disabled, forcing the converter to operate at a fixed switching frequency. The average input current is limited to a maximum value of 1500 mA. The output voltage is programmed by an external resistor divider, or is fixed internally on the chip. The converter can be disabled to minimize battery drain. During shutdown, the load is completely disconnected from the battery. 10.2 Functional Block Diagram Copyright © 2007–2014, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: TPS61200 TPS61201 TPS61202 |
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