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TPS60250RTER 데이터시트(PDF) 1 Page - Texas Instruments |
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TPS60250RTER 데이터시트(HTML) 1 Page - Texas Instruments |
1 / 24 page www.ti.com FEATURES DESCRIPTION APPLICATIONS 95 90 85 80 75 70 65 60 55 50 3 3.5 4 4.5 5 5.5 6 V -InputVoltage-V I 4MainLED-15mA, V =3.1V F C1- C2+ C2- C1+ DM1 DM5 DS2 DS1 DM3 DM4 DM2 GND SDAT SCLK VIN C1 1mF C2 1mF C3 1mF MainDisplay C4 4.7mF SubDisplay I 2CInterface On/Off, DigitalDimming VOUT TPS60250 SLVS769 – APRIL 2007 HIGH EFFICIENCY CHARGE PUMP FOR 7 WLEDs WITH I2C INTERFACE • 3.0-V to 6.0-V Input Voltage Range The TPS60250 is a high efficiency, constant frequency charge pump DC/DC converter that uses a • ×1 and ×1.5 Charge Pump dual mode 1 × and 1.5× conversion to maximize • Fully Programmable Current with I2C efficiency over the input voltage range. It drives up to – 64 Dimming Steps with 25mA Maximum five white LEDs for a main display and up to two (Sub and Main Display Banks) white LEDs for a sub display with regulated constant current for uniform intensity. By utilizing adaptive – 4 Dimming Steps with 80mA Maximum 1 ×/1.5× charge pump modes and very low-dropout (DM5 for Auxiliary Application) current regulators, the TPS60250 achieves high • 2% Current Matching for Sub LEDs at Light efficiency over the full 1-cell lithium-battery input Load Condition (Each 100 µA) voltage range. • 750-kHz Charge Pump Frequency Four enable inputs, ENmain, ENsub1, ENsub2, and • Continuous 230-mA Maximum Output Current ENaux, available through I2C, are used for simple • Auto Switching Between ×1 and ×1.5 Mode for on/off controls for the independent main, sub1, sub2, and DM5 displays, respectively. To lower operating Maximum Efficiency current when using one sub display LED, the device • Built-in Soft Start and Current Limit provides completely separate operation in sub • Open Lamp Detection display LEDs. • 16-Pin 3mm x 3mm QFN The TPS60250 is available in a 16-pin 3mmx3mm thin QFN. • Cellular Phones • PDA, PMP, GPS (Up To 4 Inch LCD Display) • Multidisplay Handheld Devices Figure 1. Typical Application for Sub and Main Figure 2. Efficiency vs Input Voltage ORDERING INFORMATION(1) PART NUMBER PACKAGE TA TPS60250RTE 16 Pin 3 mm × 3 mm QFN (RTE) –40 °C to +85°C (1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI web site at www.ti.com. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Copyright © 2007, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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