TPS75103YFFT [TI]

Low Dropout, Two-Bank LED Driver with PWM Brightness Control; 低压降,两行LED驱动器的PWM亮度控制
TPS75103YFFT
型号: TPS75103YFFT
厂家: TEXAS INSTRUMENTS    TEXAS INSTRUMENTS
描述:

Low Dropout, Two-Bank LED Driver with PWM Brightness Control
低压降,两行LED驱动器的PWM亮度控制

驱动器
文件: 总15页 (文件大小:364K)
中文:  中文翻译
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TPS7510x  
www.ti.com  
SBVS080CSEPTEMBER 2006REVISED MARCH 2007  
Low Dropout, Two-Bank LED Driver with PWM Brightness Control  
FEATURES  
DESCRIPTION  
Regulated Output Current with 2%  
LED-to-LED Matching  
The TPS7510x linear low dropout (LDO) matching  
LED current source is optimized for low power  
keypad and navigation pad LED backlighting  
applications. The device provides a constant current  
to up to four unmatched LEDs organized in two  
banks of two LEDs each in a common-cathode  
topology. Without an external resistor, the current  
source defaults to factory-programmable, preset  
current level with ±0.5% accuracy (typical). An  
optional external resistor can be used to set initial  
brightness to user-programmable values with higher  
accuracy. Brightness can be varied from off to full  
brightness by inputting a pulse width modulation  
(PWM) signal on each Enable pin. Each bank has  
independent enable and brightness control, but  
current matching is done to all four channels  
concurrently. The input supply range is ideally suited  
for single-cell Li-Ion battery supplies and the  
TPS7510x can provide up to 25mA per LED.  
Drives up to Four LEDs at 25mA Each in a  
Common Cathode Topology  
28mV Typical Dropout Voltage Extends  
Usable Supply Range in Li-Ion Battery  
Applications  
Brightness Control Using PWM Signals  
Two 2-LED Banks with Independent Enable  
and PWM Brightness Control per Bank  
No Internal Switching Signals—Eliminates EMI  
Default LED Current Eliminates External  
Components  
Default values from 3mA to 10mA (in 1mA  
increments) available using innovative  
factory EEPROM programming  
Optional external resistor can be used for  
high-accuracy, user-programmable current  
No internal switching signals are used, eliminating  
troublesome electromagnetic interference (EMI). The  
TPS7510x is offered in an ultra-small, 9-ball, 0.4mm  
ball-pitch wafer chip-scale package (WCSP) and a  
3mm × 3mm QFN package, yielding a very compact  
total solution size ideal for mobile handsets and  
portable backlighting applications. The device is fully  
specified over TJ = –40°C to +85°C.  
Over-Current and Over-Temperature  
Protection  
Available in Wafer Chip-Scale Package  
APPLICATIONS  
Keypad and Display Backlighting  
White and Color LEDs  
Cellular Handsets  
PDAs and Smartphones  
VBATT  
TPS7510x  
TPS7510x YFF  
9-Ball WCSP  
(Top View)  
VIN  
D1A  
VENA  
VENB  
ENA  
ENB  
D2A  
A3 B3  
A2 B2  
A1 B1  
C3  
C2  
C1  
D1B  
D2B  
ISET  
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.  
All trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2006–2007, Texas Instruments Incorporated  
TPS7510x  
www.ti.com  
SBVS080CSEPTEMBER 2006REVISED MARCH 2007  
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with  
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.  
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be  
more susceptible to damage because very small parametric changes could cause the device not to meet its published  
specifications.  
ORDERING INFORMATION(1)  
PRODUCT ID  
OPTIONS(2)  
TPS7510xyyyz  
X is the nominal default diode output current (for example, 3 = 3mA, 5 = 5mA, and 0 = 10mA).  
YYY is the package designator.  
Z is the reel quantity (R = 3000, T = 250).  
(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.  
(2) Default set currents from 3mA to 10mA in 1mA increments are available through the use of innovative factory EEPROM programming.  
Minimum order quantities may apply. Contact factory for details and availability.  
ABSOLUTE MAXIMUM RATINGS  
PARAMETER  
VALUE  
–0.3V to +7.0V  
–0.3V to VIN  
35mA  
VIN range  
VISET, VENA, VENB, VDX range  
IDX for D1A, D2A, D1B, D2B  
D1A, D2A, D1B, D2B short circuit duration  
Continuous total power dissipation  
Junction temperature (TJ)  
Indefinite  
Internally limited  
–55°C to +150°C  
–55°C to +150°C  
Storage temperature  
DISSIPATION RATINGS  
DERATING FACTOR  
ABOVE  
BOARD  
Low-K(1)  
High-K(2)  
PACKAGE  
YFF  
RθJC  
RθJA  
TA = +25°C  
TA < +25°C  
480mW  
TA = +70°C  
264mW  
TA = +85°C  
192mW  
55°C/W  
55°C/W  
208°C/W  
142°C/W  
4.8mW/°C  
7.0mW/°C  
YFF  
704mW  
387mW  
282mW  
(1) The JEDEC low-K (1s) board used to derive this data was a 3 inch × 3 inch, two-layer board with 2 ounce copper traces on top of the  
board.  
(2) The JEDEC high-K (2s2p) board used to derive this data was a 3 inch × 3 inch, multi-layer board with 1 ounce internal power and  
ground planes and 2 ounce copper traces on top and bottom of the board.  
RECOMMENDED OPERATING CONDITIONS  
PARAMETER  
VIN Input voltage  
MIN  
2.7  
3
TYP  
MAX  
5.5  
UNIT  
V
IDX Operating current per LED  
tPWM On-time for PWM signal  
25  
mA  
µs  
33  
TJ Operating junction temperature range  
–40  
+85  
°C  
2
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TPS7510x  
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SBVS080CSEPTEMBER 2006REVISED MARCH 2007  
ELECTRICAL CHARACTERISTICS  
Over operating junction temperature range (TJ = –40°C to +85°C), VIN = 3.8V, DxA and DxB = 3.3V, RSET = 32.4k, and ENA  
and ENB = 3.8V, unless otherwise noted. Typical values are at TA = +25°C.  
PARAMETER  
Shutdown supply current  
Ground current  
TEST CONDITIONS  
VENA,B = 0V, VDX = 0V  
MIN  
TYP  
0.03  
170  
2
MAX  
1.0  
200  
4
UNIT  
µA  
ISHDN  
IQ  
ISET = open, IDX = 5mA, VIN = 4.5V  
TA = +25°C  
µA  
0
Current matching  
(IDXMAX – IDXMIN/IDXMAX) × 100%  
ID  
%
TA = –40°C to +85°C  
5
IDX%/VIN  
Line regulation  
3.5V VIN 4.5V, IDX = 5mA  
1.8V VDX 3.5V, IDX = 5mA  
IDXnom = 5mA  
2.0  
0.8  
28  
%/V  
%/V  
IDX%/VDX Load regulation  
Dropout voltage of any  
DX current source  
(VDX at IDX = 0.8 × IDX, nom  
100  
VDO  
mV  
IDXnom = 15mA  
70  
)
VISET  
IOPEN  
ISET  
k
Reference voltage for current set  
Diode current accuracy(1)  
ISET pin current range  
1.183  
1.225  
0.5  
1.257  
3
V
%
ISET = open, VDX = VIN – 0.2V  
2.5  
400  
1.2  
62.5  
435  
µA  
ISET to IDX current ratio(1)  
420  
VIH  
Enable high level input voltage  
Enable low level input voltage  
V
V
VIL  
0.4  
6.1  
VENA = 3.8V  
VENA = 1.8V  
VENB = 3.8V  
VENB = 1.8V  
5.0  
2.2  
4.0  
1.8  
IINA  
Enable pin A (VENA) input current  
Enable pin B (VENB) input current  
µA  
µA  
4.9  
30  
IINB  
Delay from ENA and ENB = low to  
reach shutdown current  
tSD  
Shutdown delay time  
5
13  
µs  
(IDX = 0.1 × IDX, nom  
)
Shutdown, temp increasing  
Reset, temp decreasing  
+165  
+140  
TSD  
TJ  
Thermal shutdown temperature  
°C  
°C  
Operating junction temperature range  
–40  
+85  
(1) Average of all four IDX outputs.  
3
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TPS7510x  
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SBVS080CSEPTEMBER 2006REVISED MARCH 2007  
Table 1. Recommended (1% Tolerance) Set Resistor Values  
RSET (k)  
511  
ISET (µA)  
2.4  
IDX (mA)(1)  
1.0  
255  
4.8  
2.0  
169  
7.2  
3.0  
127  
9.6  
4.1  
102  
12.0  
14.5  
16.7  
18.9  
21.8  
24.0  
26.4  
29.0  
31.3  
33.6  
36.0  
37.8  
40.7  
42.7  
45.9  
48.0  
50.4  
52.8  
55.4  
57.0  
59.8  
5.0  
84.5  
73.2  
64.9  
56.2  
51.1  
46.4  
42.2  
39.2  
36.5  
34.0  
32.4  
30.1  
28.7  
26.7  
25.5  
24.3  
23.2  
22.1  
21.5  
20.5  
6.1  
7.0  
7.9  
9.2  
10.1  
11.1  
12.2  
13.1  
14.1  
15.1  
15.9  
17.1  
17.9  
19.3  
20.2  
21.2  
22.2  
23.3  
23.9  
25.1  
(1) IDX = (VSET/RSET) × k.  
4
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TPS7510x  
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SBVS080CSEPTEMBER 2006REVISED MARCH 2007  
PIN ASSIGNMENTS  
TPS7510x YFF  
9-Ball WCSP  
(Top View)  
A3 B3  
A2 B2  
A1 B1  
C3  
C2  
C1  
TERMINAL FUNCTIONS  
INPUT/  
NAME  
WCSP  
OUTPUT  
DESCRIPTION  
Enable pin, Bank A. Driving this pin high turns on the current source to Bank A outputs.  
Driving this pin low turns off the current source to Bank A outputs. An applied PWM signal  
reduces the LED current (between 0mA and the maximum current set by ISET) as a function  
of the duty cycle of the PWM signal. ENA and ENB can be tied together. ENA can be left  
OPEN or connected to GND if not used. See the Application Information section for more  
details.  
ENA  
A3  
I
D1A  
D2A  
B3  
C3  
O
O
Diode source current output, Bank A. Connect to LED anode.  
Diode source current output, Bank A. Connect to LED anode.  
Enable pin, Bank B. Driving this pin high turns on the current source to Bank B outputs.  
Driving this pin low turns off the current source to Bank B outputs. An applied PWM signal  
reduces the LED current (between 0mA and the maximum current set by ISET) as a function  
of the duty cycle of the PWM signal. ENA and ENB can be tied together. ENB can be left  
OPEN or connected to GND if not used. See the Application Information section for more  
details.  
ENB  
A2  
I
VIN  
B2  
C2  
I
Supply Input  
Ground  
GND  
An optional resistor can be connected between this pin and GND to set the maximum  
current through the LEDs. If no resistor is connected, ISET defaults to the  
internally-programmed value.  
ISET  
A1  
O
D1B  
D2B  
B1  
C1  
O
O
Diode source current output, Bank B. Connect to LED anode.  
Diode source current output, Bank B. Connect to LED anode.  
5
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SBVS080CSEPTEMBER 2006REVISED MARCH 2007  
FUNCTIONAL BLOCK DIAGRAM  
Controlled Current Source  
D1A  
D2A  
D1B  
Control  
Logic  
ENA  
800kW  
Controlled Current Source  
Controlled Current Source  
ENB  
Control  
Logic  
1MW  
VIN  
D2B  
Controlled Current Source  
Int/Ext  
Set Current  
Sense  
ISET  
Current  
Reference  
GND  
6
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TPS7510x  
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SBVS080CSEPTEMBER 2006REVISED MARCH 2007  
TYPICAL CHARACTERISTICS  
Over operating junction temperature range (TJ = –40°C to +85°C), VIN = 3.8V, DxA and DxB = 3.3V, RSET = 32.4k, and ENA  
and ENB = high, unless otherwise noted. Typical values are at TA = +25°C.  
LED CURRENT vs DUTY CYCLE (f = 300Hz)  
LINE TRANSIENT (600mV Pulse)  
25  
20  
15  
10  
5
3.9V  
1V/div  
VIN  
3.6V  
0.5mA/div  
IOUT  
0
20ms/div  
0
10  
20  
30  
40  
50  
60  
70  
80  
90 100  
Duty Cycle (%)  
Figure 1.  
Figure 2.  
LINE TRANSIENT (300mV Pulse)  
DIMMING RESPONSE (Both Channels)  
1.2V  
3.6V  
0.4V  
1V/div  
3.3V  
VIN  
1V/div  
ENA = ENB  
20mA/div  
IOUT  
0.5mA/div  
IOUT  
20ms/div  
20ms/div  
Figure 3.  
Figure 4.  
DIMMING RESPONSE (Single Channel)  
OUTPUT CURRENT vs HEADROOM VOLTAGE  
25  
20  
15  
10  
5
ENA = 3.8V  
-40°C  
1.2V  
0.4V  
1V/div  
ENB  
+25°C  
+85°C  
20mA/div  
IOUT  
0
20ms/div  
0
0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20  
VIN - VOUT (V)  
Figure 5.  
Figure 6.  
7
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TPS7510x  
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SBVS080CSEPTEMBER 2006REVISED MARCH 2007  
TYPICAL CHARACTERISTICS (continued)  
Over operating junction temperature range (TJ = –40°C to +85°C), VIN = 3.8V, DxA and DxB = 3.3V, RSET = 32.4k, and ENA  
and ENB = high, unless otherwise noted. Typical values are at TA = +25°C.  
OUTPUT CURRENT vs RSET  
OUTPUT CURRENT vs RSET  
28  
26  
24  
22  
20  
18  
16  
14  
12  
10  
8
28  
26  
24  
22  
20  
18  
16  
14  
12  
10  
8
Expanded Range  
6
6
4
4
2
2
0
0
20 60 100 140 180 220 260 300 340 380 420 460 500  
20  
30  
40  
50  
60  
70  
80  
90  
100  
RSET (kW)  
RSET (kW)  
Figure 7.  
Figure 8.  
TPS75105 OUTPUT CURRENT vs INPUT VOLTAGE  
RSET = Open  
GROUND CURRENT vs INPUT VOLTAGE  
180  
175  
170  
165  
160  
155  
5.4  
5.3  
5.2  
5.1  
5.0  
4.9  
4.8  
4.7  
4.6  
+25°C  
-40°C  
+85°C  
+85°C  
+25°C  
-40°C  
2.5  
3.0  
3.5  
4.0  
4.5  
5.0  
5.5  
3.4  
3.9  
4.4  
4.9  
5.4  
5.9  
VIN (V)  
VIN (V)  
Figure 9.  
Figure 10.  
TPS75105 OUTPUT CURRENT vs TEMPERATURE  
RSET = Open  
OUTPUT CURRENT vs OUTPUT VOLTAGE  
5.4  
5.3  
5.2  
5.1  
5.0  
4.9  
4.8  
4.7  
4.6  
20  
18  
16  
14  
12  
10  
8
IOUT D1B  
IOUT D2B  
IOUT D2A  
IOUT D1A  
6
+85°C  
+25°C  
-40°C  
4
2
0
-40  
-20  
0
20  
40  
60  
80 85  
0
0.5  
1.0  
1.5  
2.0  
2.5  
3.0  
3.5  
4.0  
Temperature (°C)  
VOUT (V)  
Figure 11.  
Figure 12.  
8
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SBVS080CSEPTEMBER 2006REVISED MARCH 2007  
APPLICATIONS INFORMATION  
SETTING THE OUTPUT CURRENT LEVEL  
LIMITATIONS ON LED FORWARD  
VOLTAGES  
The TPS7510x is a quad matched current source.  
Each of the four current source output levels is set  
by a single reference current. An internal voltage  
reference of 1.225V (nominal) in combination with a  
resistor sets the reference current level. This  
reference current is then mirrored onto each of the  
four outputs with a ratio of typically 420:1. The  
resistor required to set the LED current is calculated  
using Equation 1:  
The TPS7510x is  
a
linear current source  
implementing LDO regulator building blocks.  
Therefore, there are some limitations to the forward  
(output) voltages that can be used while maintaining  
accurate operation. The first limitation is the  
maximum LED forward voltage. Because LDO  
technology is employed, there is the dropout voltage  
to consider. The TPS7510x is an ultra-low dropout  
device with typical dropouts in the range of 30mV at  
5mA. Care must be taken in the design to ensure  
that the difference between the lowest possible input  
voltage (for example, battery cut-off) and the highest  
possible forward voltage yields at least 100mV of  
headroom. Headroom levels less than dropout  
decrease the accuracy of the current source (see  
Figure 6).  
K ´ VISET  
RISET  
=
ILED  
(1)  
where:  
K is the current ratio  
VISET is the internal reference voltage  
ILED is the desired LED current  
For example, to set the LED current level to 10mA, a  
resistor value of 51.1kis required. This value sets  
up a reference current of 23.9µA (1.22V/51.1k). In  
turn, this reference current is mirrored to each output  
current source, resulting in an output current of  
10mA (23.9µA × 420).  
The other limitation to consider is the minimum  
output voltage required to yield accurate operation.  
The current source employs NMOS MOSFETs, and  
a minimum forward LED voltage of approximately  
1.5V on the output is required to maintain highest  
accuracy. The TPS7510x is ideal for white LEDs and  
color LEDs with forward voltages greater than 1.5V.  
This range includes red LEDs that have typical  
forward voltages of 1.7V.  
The TPS7510x offers two methods for setting the  
output current levels. The LED current is set either  
by connecting  
a
resistor (calculated using  
Equation 1) from the ISET pin to GND, or leaving ISET  
unconnected to employ the factory-programmed  
RSET resistance. The internal programmed resistance  
is implemented using high-precision processing and  
yields a reference current accuracy of 0.5%, nominal.  
Accuracy using external resistors is subject to the  
tolerance of the external resistor and the accuracy of  
the internal reference voltage.  
USE OF EXTERNAL CAPACITORS  
The TPS7510x does not require the use of any  
external capacitors for stable operation. Nominal  
stray and/or power-supply decoupling capacitance on  
the input is adequate for stable operation. Capacitors  
are not recommended on the outputs because they  
are not needed for stability.  
The TPS7510x automatically detects the presence of  
an external resistor by monitoring the current out of  
the ISET pin. Current levels in excess of 3µA signify  
the presence of an external resistor and the device  
uses the external resistor to set the reference  
current. If the current from ISET is less than 3µA, the  
device defaults to the preset internal reference set  
resistor. The TPS7510x is available with eight preset  
current levels, from 3mA to 10mA (per output) in  
1mA increments. Solutions using the preset internal  
current level eliminate an external component,  
thereby increasing accuracy and reducing cost.  
USE OF UNUSED OUTPUTS OR TYING  
OUTPUTS TOGETHER  
Unused outputs may be left unconnected or tied to  
the VIN supply. While open outputs are acceptable,  
tying unused outputs to the VIN supply increases  
ESD protection. Connecting unused output to ground  
violates the minimum recommended output voltage,  
results in current levels that potentially exceed the  
set/preset LED current and should be avoided.  
Connecting outputs in parallel is an acceptable way  
of increasing the amount of LED current drive. This  
configuration is a useful trick when the higher current  
level is a multiple of the preset value.  
9
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SBVS080CSEPTEMBER 2006REVISED MARCH 2007  
USE OF ENABLE PINS FOR PWM DIMMING  
consumption. Connecting unused enable pins to  
ground increases ESD protection. If connected to  
VIN, a small amount of current drains through the  
enable input (see the Electrical Characteristics  
table).  
The TPS7510x divides control of the LED outputs  
into two banks of two current sources each. Each  
bank is controlled by the use of an independent,  
active-high enable pin (ENA and ENB). The enable  
pin can be used for standard ON/OFF operation of  
the current source, driven by standard logic levels  
from processor GPIO pins, for example. Drive EN  
high to turn on the bank of LEDs; drive EN low to  
turn off the bank of LEDs.  
LOAD REGULATION  
The TPS7510x is designed to provide very tight load  
regulation. In the case of a fixed current source, the  
output load change is a change in voltage. Tight load  
regulation means that output voltages (LED forward  
voltages) with large variations can be used without  
impacting the fixed current being sourced by the  
output or the output-to-output current matching. The  
permissible variation on the output not only allows for  
large variations in white LED forward voltages, but  
even permits the use of different color LEDs on  
different outputs with minimal effect on output  
current.  
Another use of the enable pin is for LED dimming.  
LED brightness is a function of the current level  
being driven across the diode and the time that  
current is being driven through the diode. The  
perceived brightness of an LED can be changed by  
either varying the current level or, more effectively,  
by changing the time in which that current is present.  
When a PWM signal is input into the enable pin, the  
duty cycle (high or ON time) determines how long  
the fixed current is driven across the LEDs.  
Reducing or increasing that duration has the effect of  
dimming or brightening the LED, without having to  
employ the more complex method of varying the  
current level. This technique is particularly useful for  
reducing LED brightness in low ambient light  
conditions, where LED brightness is not required,  
thereby decreasing current consumption. The enable  
pins can also be used for LED blinking, varying blink  
rates based on system status.  
LINE REGULATION  
The TPS7510x is also designed to provide very tight  
line regulation. This architecture allows for voltage  
transient events to occur on the power supply  
(battery) without impacting the fixed output current  
levels or the output to output current matching. A  
prime example of such a supply transient event is  
the occurrence of a transmit pulse on the radio of a  
mobile handset. These transient pulses can cause  
variations of 300mV and 600mV on the supply to the  
TPS7510x. The line regulation limitation is that the  
lower supply voltage level of the event does not  
cause the input to output voltage difference to drop  
below the dropout voltage range.  
Although providing many useful applications, PWM  
dimming does have a minimum duty cycle required  
to achieve the required current level. The  
recommended minimum on time of the TPS7510x is  
approximately 33µs. On times less than 33µs result  
in reductions in the output current by not allowing  
enough time for the output to reach the desired  
current level. Also, having both enables switching  
together, asynchronously, or having one enable on at  
all times, impacts the minimum recommended on  
time (see Figure 4 and Figure 5). If one enable is  
already on, the speed at which the other channel  
turns on is faster than if both channel were turning  
on together or if the other channel is off. Therefore,  
connecting one enable on allows for approximately  
10µs to 12µs shorter minimum on times of the  
switching enable channel.  
TPS7510x  
ENA  
ENB  
D1A  
D2A  
D1B  
D2B  
Dimming PWM  
or CPU GPIO  
VIN  
Li-Ion  
Battery  
ISET  
GND  
RSET  
(optional)  
Unused enable pins can be left unconnected or  
connected to ground to minimize current  
Figure 13. Typical Application Diagram  
10  
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TPS7510x  
www.ti.com  
SBVS080CSEPTEMBER 2006REVISED MARCH 2007  
1,213  
1,193  
1,213  
1,193  
Figure 14. YFF Wafer Chip-Scale Package Dimensions (in mm)  
11  
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PACKAGE OPTION ADDENDUM  
www.ti.com  
16-Apr-2007  
PACKAGING INFORMATION  
Orderable Device  
TPS75103YFFR  
TPS75103YFFT  
TPS75105YFFR  
TPS75105YFFT  
Status (1)  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
Package Package  
Pins Package Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)  
Qty  
Type  
Drawing  
DSBGA  
YFF  
9
9
9
9
3000 Green (RoHS &  
no Sb/Br)  
SNAG  
SNAG  
Call TI  
Call TI  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
DSBGA  
DSBGA  
DSBGA  
YFF  
YFF  
YFF  
250 Green (RoHS &  
no Sb/Br)  
3000 Green (RoHS &  
no Sb/Br)  
250 Green (RoHS &  
no Sb/Br)  
(1) The marketing status values are defined as follows:  
ACTIVE: Product device recommended for new designs.  
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.  
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in  
a new design.  
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.  
OBSOLETE: TI has discontinued the production of the device.  
(2)  
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check  
http://www.ti.com/productcontent for the latest availability information and additional product content details.  
TBD: The Pb-Free/Green conversion plan has not been defined.  
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements  
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered  
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.  
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and  
package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS  
compatible) as defined above.  
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame  
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)  
(3)  
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder  
temperature.  
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Addendum-Page 1  
IMPORTANT NOTICE  
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