- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383963 > TPS60251RTW (Texas Instruments, Inc.) HIGH EFFICIENCY CHARGE PUMP FOR 7 WLEDs WITH I2C INTERFACE PDF資料下載
參數(shù)資料
| 型號： | TPS60251RTW |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | HIGH EFFICIENCY CHARGE PUMP FOR 7 WLEDs WITH I2C INTERFACE |
| 中文描述： | 高效電荷泵7，帶有I2C接口個WLED |
| 文件頁數(shù)： | 3/28頁 |
| 文件大?。?/td> | 515K |
| 代理商： | TPS60251RTW |
第1頁第2頁當前第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁
www.ti.com
TPS60251
SLVS767–APRIL 2007
ELECTRICAL CHARACTERISTICS (continued)
V
I
= 3.5 V, T
A
= –40
°
C to 85
°
C, R
IS
= 562 k
, typical values are at T
A
= 25
°
C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
V
UVLO2
V
hys
V
ENA_H
V
ENA_L
UVLO Threshold voltage2
(2)
V
I
falling
UVLO1
1.2
1.3
1.5
V
Under-voltage lockout hysterisis
210
mV
Enable high threshold voltage
1.5
V
I
V
Enable low threshold voltage
0.4
V
V
I
= 3 V, C
= 1
μ
F,
I
MAIN_LED
= 15 mA
×
4
T
S
Soft start time
(3)
0.5
ms
CHARGE PUMP
V
out
F
s
Overvoltage limit
6.5
V
Switching frequency
750
kHz
×
1 Mode, (V
I
– V
O
)/I
O
×
1.5 Mode, (V
I
×
1.5 – V
O
)/I
O
V
I
= 3.0V (I
O
=
120mA)
1.2
R
O
Open loop output impedance
3.5
5.0
CURRENT SINK
Current matching of sub LEDs at light
load condition
(4)
I
SUB_LED
= 100
μ
A
×
2, V
DXX
= 0.4 V
K
m_sub
0
±
2%
I
= 15 mA
×
4,
3.0 V
≤
V
I
≤
4.2 V
I
LED
= 15 mA
Main and Sub Display Current Register =
0
×
01&2(111111),
V
DXX
= 0.2 V
Aux Display Current Register = 0
×
03
(XXXX11), V
DM5
= 0.4 V
3.0V
≤
V
I
≤
6.0V
I
LED
= 100
μ
A
(6)
K
m_main
LED to LED Current matching
(5)
±
1%
±
5%
K
a
Current accuracy
±
6%
Maximum LED current of DM1-4 and
DS1-2
I
D_MS
25.5
mA
I
D_DM5
Maximum LED current of DM5
80
mA
V
IS
IS Pin voltage
1.229
1.254
1.279
V
44.8
Output current to current set ratio sub
LEDs
I
sub
6722
I
LED
= 15 mA
(6)
44.8
I
LED
= 100
μ
A
(6)
Output current to current set ratio main
LEDs
I
main
6722
I
LED
= 15 mA
(6)
I
DM5
Output current to current set ratio DM5
35853
I
LED
= 80 mA
(6)
See
(7)
V
DropOut
LED Drop out voltage
80
120
mV
1
×
Mode to 1.5
×
mode transition
threshold voltage
(8)
V
Falling, 15 mA
×
4 measured on the
lowest V
DXX
Measured as V
I
– (V
O
– V
DXX_MIN
), I
MAIN_LED
= 15
mA
×
4
V
TH_GU
85
100
120
mV
Input voltage hysteresis for 1.5
×
to 1
×
mode transition
V
TH_GD
470
mV
SERIAL INTERFACE TIMING REQUIREMENTS
f
max
t
wH(HIGH)
t
wL(LOW)
t
r
t
f
Clock frequency
400
kHz
Pulse duration, clock high time
600
ns
Pulse duration, clock low time
1300
ns
DATA and CLK rise time
300
ns
DATA and CLK fall time
300
ns
High time (repeated) START
condition(after this period the first clock
pulse is generated)
t
h(STA)
600
ns
Setup time for repeated START
condition
t
su(STA)
600
ns
t
h(DATA)
Data input hold time
0
ns
(2)
(3)
(4)
(5)
(6)
(7)
Shut down completely and come up with all 0's after device restart
Measurement Condition: From enabling the LED driver to 90% output voltage after V
I
is already up.
LED current matching is defined as: (I
– I
AVG_SUB
) / I
AVG_SUB
LED to LED Current Matching is defined as: (I
– I
) / I
See the
Setting the LED Current
section of the data sheet for details on calculating LED current given by dimming step and R
.
Dropout Voltage is defined as V
(WLED Cathode) to GND voltage at which current into the LED drops 10% from the LED current at
V
= 0.2 V, WLED current = 15 mA
×
4.
As V
drops, V
eventually falls below the switchover threshold of 100mV, and TPS60251 switches to 1.5
×
mode. See the
Operating
Principle
section for details about the mode transition thresholds.
(8)
3
Submit Documentation Feedback
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPS61026DRC | 96% EFFICIENT SYNCHRONOUS BOOST CONVERTER |
| TPS61029DRC | 96% EFFICIENT SYNCHRONOUS BOOST CONVERTER |
| TPS61026DRCRG4 | 96% EFFICIENT SYNCHRONOUS BOOST CONVERTER |
| TPS61028DRC | 96% EFFICIENT SYNCHRONOUS BOOST CONVERTER |
| TPS61040DRV | LOW-POWER DC/DC BOOST CONVERTER IN SOT-23 AND SON PACKAGES |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS60251RTWR | 功能描述:LED照明驅(qū)動器 High Eff Charge Pump RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| TPS60251RTWRG4 | 功能描述:LED照明驅(qū)動器 High Eff Charge Pump RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| TPS60251RTWT | 功能描述:LED照明驅(qū)動器 High Eff Charge Pump RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| TPS60251RTWT | 制造商:Texas Instruments 功能描述:DC/DC Charge Pump Converter IC |
| TPS60251RTWTG4 | 功能描述:LED照明驅(qū)動器 High Eff Charge Pump RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
發(fā)布緊急采購，3分鐘左右您將得到回復。