Page 132 2010 AUTUMN
TK11892
DCDC Converter, 1ch, Step-up, Inductive
DCDCコンバータ、1ch、昇圧、インダクティブ
Feature
Built-in three modes 3モード内蔵
- LED dimming and shutdown mode - ライト･フラッシュ･シャットダウン
Wide operating voltage range (2.65 to 8.0V) 動作電圧範囲: 2.65V to 8.0V
2.0MHz operation 動作周波数 2MHz
Internal switching transistor (max 1.0A) スイッチングトランジスタ内蔵
Maximum duty cycle 90% 最大デューティ比90%
Very small inductor available 小型コイル使用可能
Very small package, SON3024-8 0.75mm薄型パッケージSON3024-8
Operating Voltage Range VOP=2.65 to 8.0V 動作電圧範囲VOP=2.65~8.0V
Operating Temp. Range TOP=-30 to +85°C 動作温度範囲TOP=-30~+85°C
Power Dissipation PD=600mW 許容消費電力PD=600mW
Characteristics
Part Name Number of
Current Stabilizer
fOSC Number of LED in
serial connection
ILED Max
TK11892 - 2.0MHz 2 to 4 LED 100mA
Ordering Guide, Marking
Part Name Ordering Name Marking Description Order
Size
TK11892 TK11892FTL-GH AB2
LOT
TK11892: Part Name
F: SON3024-8 Package
TL: Tape&Reel, Left
-GH:
PB-Free&Halogen Fre
e
3,000
pcs.
/Reel
Block Diagram, Standard Application
EA
OUT
V
IN
Error Amp 1
PWM Comp
SW
V
FB1
GND
Error Amp 2
SW1
SW2
CONT2
CONT1
2
Open
Circuit
Protection
8
Oscillator
1
3
4
Output
Drive
Control
7
6
5
V
FB2
Over Current
Detector
Control
Circuit
Referrence
Voltage
R
LED1
3.3
Ω
3.3
μ
H
C
IN
I
LED
4
81
2
3
TK11892F
5
6
7
V
IN
SBD
C
OUT
SW
CONT1
CONT2
V
FB1
V
FB2
GND
V
IN
E
A.OUT
R
LED2
3.3
Ω
C
EA
2.2
μ
F0.1
μ
F
