Page 128 2010 AUTUMN
TK11859
DCDC Converter, 1ch, Step-up, Inductive
DCDCコンバータ、1ch、昇圧、インダクティブ
Feature
High efficiency 高効率85％
1.2MHz operation 動作周波数 1.2MHz
Internal switching transistor スイッチングトランジスタ内蔵
Maximum duty cycle 90% 最大デューティーサイクル 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=2.30 to 16V 動作電圧範囲VOP=2.30~16V
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
TK11859 - 1.2MHz 2 to 4 LED 20mA
Ordering Guide, Marking
Part Name Ordering Name Marking Description Order
Size
TK11859 TK11859FTL-GH AB4
LOT
TK11859: Part Name
F: SON3024-8 Package
TL: Tape&Reel, Left
-GH:
PB-Free&Halogen Fre
e
3,000
pcs.
/Reel
Block Diagram, Standard Application
3
2
1
Oscillator
Output
Drive
Control
GND OVP
EA
OUT
8
6
V
IN
Reference
Voltage
0.179V
0.6V
Error Amp
PWM Comp
7SW
45
V
FB
Over
Current
Detector
EN PGND
RLED
L
CIN
ILED
PGN
D
4
81
2
3
TK11859F
5
6
7
VIN
GND
VFB EA.OUT
SW
OVP
En
VIN
on/off
SBD
COUT
CEA
