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TPS60250RTER 데이터시트(PDF) 1 Page - Texas Instruments

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부품명 TPS60250RTER
상세설명  HIGH EFFICIENCY CHARGE PUMP FOR 7 WLEDs WITH I2C INTERFACE
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제조업체  TI [Texas Instruments]
홈페이지  http://www.ti.com
Logo TI - Texas Instruments

TPS60250RTER 데이터시트(HTML) 1 Page - Texas Instruments

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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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