Texas Instruments TPS60250-185 Evaluation Board TPS60250EVM-185 TPS60250EVM-185 Scheda Tecnica
Codici prodotto
TPS60250EVM-185
1
FEATURES
DESCRIPTION
APPLICATIONS
C1-
C2+
C2-
C1+
DM1
DM5
DS2
DS1
DM3
DM4
DM2
GND
SDAT
SCLK
VIN
C1
4.7mF
C2
1mF
1mF
C3
1mF
1mF
Main Display
C4
4.7mF
4.7mF
Sub Display
I
2
C Interface
On/Off, Digital Dimming
VOUT
95
90
85
80
75
70
65
60
55
50
3
3.5
4
4.5
5
5.5
6
V - Input Voltage - V
I
Efficiency-%
4 Main LED - 15 mA,
V = 3.1 V
V = 3.1 V
F
www.ti.com
............................................................................................................................................................
SLVS769C – APRIL 2007 – REVISED APRIL 2008
HIGH EFFICIENCY CHARGE PUMP FOR 7 WLEDs WITH I
2
C INTERFACE
•
3.0 V to 6.0 V Input Voltage Range
• ×
1 and
×
1.5 Charge Pump
The
TPS60250/2
are
high
efficiency,
constant
•
Fully Programmable Current with I
2
C
frequency charge pump DC/DC converters that use
–
64 Dimming Steps with 25mA Maximum
dual mode 1
×
and 1.5
×
conversions to maximize
(Sub and Main Display Banks)
efficiency over the input voltage range. The devices
drive up to five white LEDs for the main display and
drive up to five white LEDs for the main display and
–
4 Dimming Steps with 80mA Maximum
up to two white LEDs for the sub display with
(DM5 for Auxiliary Application)
regulated constant current for uniform intensity. By
•
2% Current Matching for Sub LEDs at Light
utilizing adaptive 1
×
/1.5
×
charge pump modes and
Load Condition (Each 100
µ
A)
very low-dropout current regulators, the TPS60250/2
•
750 kHz Charge Pump Frequency
achieve
high
efficiency
over
the
full
1-cell
lithium-battery input voltage range.
•
Continuous 230mA Maximum Output Current
Four enable inputs, ENmain, ENsub1, ENsub2, and
•
Auto Switching Between
×
1 and
×
1.5 Mode for
ENaux, available through the I
2
C, are used for simple
Maximum Efficiency
on/off controls for the independent main, sub1, sub2,
•
Built-in Soft Start and Current Limit
and
DM5
displays,
respectively.
To
lower
the
•
Open Lamp Detection
operating current when using one sub display LED,
the devices provide completely separate operation for
the devices provide completely separate operation for
•
16-Pin 3mm x 3mm QFN
the sub display LEDs.
•
TPS60250 (I
2
C Slave Address: 1110111)
The TPS60250/2 are available in a 16-pin 3mm x
•
TPS60252 (I
2
C Slave Address: 1110110)
3mm thin QFN.
•
Cellular Phones
•
PDA, PMP, GPS (Up To 4 Inch LCD Display)
•
Multidisplay Handheld Devices
Figure 2. Typical Application for Sub and Main
Figure 1. Efficiency vs Input Voltage
ORDERING INFORMATION
(1)
PART NUMBER
PACKAGE
T
A
TPS60250RTE
16-Pin 3 mm
×
3 mm QFN (RTE)
–40
°
C to +85
°
C
TPS60252RTE
(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.
web site at www.ti.com.
1
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.
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 © 2007–2008, 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.
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.