TPS60255 Series

7-channel, high efficiency 175-mA charge pump for white LED backlight

Catalog

7-channel, high efficiency 175-mA charge pump for white LED backlight

Part	Voltage - Input [Max]	Voltage - Input [Min]	Utilized IC / Part	Outputs and Type	Outputs and Type	Current - Output / Channel [custom]	Features	Supplied Contents	Dimming	Internal Switch(s)	Current - Output / Channel	Type	Applications	Frequency	Supplier Device Package	Topology	Package / Case	Mounting Type	Voltage - Supply (Max) [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Number of Outputs
Texas Instruments TPS60255EVM-262	6 V	2.7 V	TPS60255	Non-Isolated	7	25 mA	Dimmable	Board(s) Cable(s)
Texas Instruments TPS60255RTET									Single-Wire		25 mA 80 mA	DC DC Regulator	Backlight	750 kHz	16-WQFN (3x3)	Switched Capacitor (Charge Pump)	16-WFQFN Exposed Pad	Surface Mount	6 V	85 °C	-40 °C	7

Catalog

7-channel, high efficiency 175-mA charge pump for white LED backlight

Key Features

• 2.7 V to 6.0 V Input Voltage Range1× and 1.5× Charge PumpAuto Switching Between 1× and 1.5× Modes750 kHz Charge Pump FrequencySeven Individually-regulated WLED Current SinksSingle- Wire Interface for Dimming and ON/OFF Control25 mA max LED Current for Six Current SinksOne 80 mA Current SinkOpen WLED DetectionBuilt-in Soft Start and Current Limit16-pin, 3 mm × 3 mm QFN PackageAPPLICATIONSCellular PhonesPortable Navigation DisplaysMulti-display Handheld Devices2.7 V to 6.0 V Input Voltage Range1× and 1.5× Charge PumpAuto Switching Between 1× and 1.5× Modes750 kHz Charge Pump FrequencySeven Individually-regulated WLED Current SinksSingle- Wire Interface for Dimming and ON/OFF Control25 mA max LED Current for Six Current SinksOne 80 mA Current SinkOpen WLED DetectionBuilt-in Soft Start and Current Limit16-pin, 3 mm × 3 mm QFN PackageAPPLICATIONSCellular PhonesPortable Navigation DisplaysMulti-display Handheld Devices

Description

The TPS60255 is a high-efficiency, constant frequency charge pump DC/DC converter that uses 1× and 1.5× conversion to maximize efficiency for the input voltage range. By using adaptive 1×/1.5× charge-pump modes and very low dropout current regulators, the TPS60255 achieves high efficiency for the entire one-cell lithium battery range. The protection features include soft start, over-current limit, thermal shut down, and over-voltage detection. The device automatically detects and removes unused current sinks from the control loop. This device drives six 25 mA current sinks and one 80 mA current sink. These current regulators are programmed by three independent brightness registers and five ON/OFF bits using a single-wire interface (EasyScale™). This offers flexible applications for a variety of lighting control in portable devices. The TPS60255 is a high-efficiency, constant frequency charge pump DC/DC converter that uses 1× and 1.5× conversion to maximize efficiency for the input voltage range. By using adaptive 1×/1.5× charge-pump modes and very low dropout current regulators, the TPS60255 achieves high efficiency for the entire one-cell lithium battery range. The protection features include soft start, over-current limit, thermal shut down, and over-voltage detection. The device automatically detects and removes unused current sinks from the control loop. This device drives six 25 mA current sinks and one 80 mA current sink. These current regulators are programmed by three independent brightness registers and five ON/OFF bits using a single-wire interface (EasyScale™). This offers flexible applications for a variety of lighting control in portable devices.