Deliver Your News to the World

TI High-Efficiency Charge Pump With 12C I nterface Drives Seven White Leds


Texas Instruments Incorporated (TI) (NYSE: TXN) introduced today a high-efficiency, constant-frequency charge pump DC/DC converter that uses dual-mode conversion to maximize efficiency over the input voltage range. The tiny 3 mm x 3 mm device provides a fully programmable current with I2C interface for applications, such as cellular phones, PDAs and multi-display handheld devices. See:

TIís TPS60250 drives up to five white LEDs for a main display and up to two white LEDs for a sub-display with regulated constant current for uniform intensity. By utilizing adaptive charge pump modes and very low-dropout current regulators, the TPS60250 achieves high efficiency over the full one-cell lithium-battery input voltage range. Four enable inputs, available through I2C, are used for simple on/off controls for the independent displays. To lower operating current when using one sub-display LED, the device provides completely separate operation in sub-display LEDs.
Key Features:
3-V to 6-V input voltage range
1x and 1.5x charge pump
Fully programmable current with I2C
64 dimming steps with 25 mA maximum (sub and main display banks)
4 dimming steps with 80 mA maximum (DM5 for auxiliary application)
Two percent current matching for sub-LEDs at light load condition (each 100 ¬ĶA)
750-kHz charge pump frequency
Continuous 230-mA maximum output current
Auto-switching between 1x and 1.5x mode for maximum efficiency
Built-in soft start and current limit
Open lamp detection
16-pin, 3 mm x 3 mm QFN
Pricing and Availability
The TPS60250 is shipping in volume production today from TI and its worldwide network of distributors and packaged in a 3 mm x 3 mm, 16-pin QFN packaging. Suggested resale price starts at $1.40 in 1,000-unit quantities.
Lighting and Display Solutions
TI provides the broadest portfolio of high-performance products for todayís LED design requirements, along with local support and applications expertise to help designers get to market faster. TIís LED products include power management, such as AC/DC, power factor correction, DC/DC and linear power conversion; RF transceivers; digital signal processors (DSPs); and ultra-low-power microcontrollers (MCUs). TIís products support applications ranging from ultra-small portable displays to the largest lighting and display panels in the industry.


This news content was configured by WebWire editorial staff. Linking is permitted.

News Release Distribution and Press Release Distribution Services Provided by WebWire.