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TK11880FTL-G Fiches technique(PDF) 2 Page - TOKO, Inc

No de pièce TK11880FTL-G
Description  Step-Up DC-DC Converter
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Fabricant  TOKO [TOKO, Inc]
Site Internet  http://www.toko.com
Logo TOKO - TOKO, Inc

TK11880FTL-G Fiches technique(HTML) 2 Page - TOKO, Inc

  TK11880FTL-G Datasheet HTML 1Page - TOKO, Inc TK11880FTL-G Datasheet HTML 2Page - TOKO, Inc  
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POWER&RF
2005 FALL
V
IN=3V, TA=25°C
Value
Parameter
項目Symbol 記号
MIN.
TYP.
MAX.
Unit
単位 Conditions
条件
Threshold voltage
スレッショルド電圧
V
EA
475
495
515
mV
Input bias current
V
FB端子入力電流
I
EAIN
-1.0
-0.2
1.0
µA
V
FB=0V
Voltage gain
電圧利得
A
V
-
40
-
dB
Gain band width
周波数帯域幅
GBW
-
2
-
MHz
A
V=0dB
Output high voltage
出力ハイ電圧 V
EAOUT,HIGH
0.78
0.87
-
V
V
FB=0V
Output low voltage
出力ロー電圧 V
EAOUT,LOW
-
0.05
0.2
V
V
FB=1.0V
Output source current
出力ソース電流 I
EAOUT,SOURCE
-
-36
-21
µA
V
EAOUT=0.45V
Output sink current
出力シンク電流
I
EAOUT,SINK
21
36
-
µA
V
EAOUT=0.45V
Dead time control section
休止期間調整部
Maximum duty cycle
最大デューティサイクル
D
MAX
88
93
-
%
V
FB=0V
Shutdown section (En pin)
シャットダウン部 (EN 端子)
En input voltage +
EN端子入力ハイ電圧
V
EN,HIGH
1.2
-
20
V
On mode
En input voltage -
EN端子入力ロー電圧
V
EN,LOW
0
-
0.3
V
Shutdown mode
En pin input bias current
EN端子入力電流
I
ENIN
-25
55
µA
V
EN=3V
Output switch section (Sw pin)
出力部 (SW 端子)
Switch current limit
スイッチ制限電流
I
SW,LIMIT
0.6
1.3
1.8
A
Switch saturation voltage
スイッチ飽和電圧
V
SW,SAT
-
0.12
0.2
V
I
SW=200mA
Switch leakage current
スイッチオフ時リーク電流
I
SW,OFF
-
0.01
2.0
µA
V
FB=1V, VSW=24.5V
Open-circuit protection section (OVP pin)
LEDオープン保護回路 (OVP 端子)
Open-circuit voltage
OVP端子電圧
V
OVP
25.0
26.6
28.6
V
I
z=0.6mA
V
in section (vin pin)
電源電圧部 (V
IN 端子)
Low voltage stop
低入力停止電圧
V
IN,LOW
2.20
2.45
2.65
V
Quiescent supply current
静止動作消費電流
I
IN,ON
2.4
3.9
5.4
mA
V
FB=1V
Shutdown supply current シャットダウン消費電流
I
IN,OFF
-
0.01
1.0
µA
V
EN=0V
BLOCK DIAGRAM
PWM
comp
Output
drive
control
7
6
5
8
2
3
4
1
0.495V
Err amp
Over
current
detector
Oscillator
0.6V
Reference
PGND
4
8
1
2
3
TK11880F
5
6
7
V
IN
GND
V
FB
E
A.OUT
SW
OVP
En
6 W-LEDs DRIVER APPLICATION
Designed Performance
Parameter
Value
Input Voltage
V
IN=3.0 to 9.0V
LED Current
I
LED=20mA
Oscillation Frequency
1.0MHz
Inductor Peak Current
300mA
Coil (TOKO)
Type DB318C 15
µH A997AS-150M
Type D52LC 10
µH
A914BYW-100M
R
LED
24
L
4.7
µF
C
IN
I
LED
PGND
4
8
1
2
3
TK11880F
5
6
7
V
IN
GND
V
FB
E
A.OUT
SW
OVP
En
V
IN
on/off
SBD
2.2
µF
C
OUT
1.0
µF
C
EA


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