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TK11840L-G Datasheet, PDF (1/4 Pages) TOKO, Inc – Step-up DC-DC converter / white LED driver IC | |||
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POWER&RF
Step-up DC-DC converter / white LED driver IC
æå§åDC-DCã³ã³ãã¼ã¿ / ç½è²LEDãã©ã¤ãIC
TK11840L-G
DESCRIPTION
The TK11840L-G is a step-up DC-DC converter that drives an
external NPN power transistor using a constant frequency
PWM architecture. The IC works with a wide operating supply
range (1.8V to 10V) and has an adjustable output. The IC
timing oscillator operating frequency is programmable and
can be set up to 1MHz. It also incorporates a soft-start circuit
and a short-circuit detection function of a timer-latch type.
TK11840L-Gã¯PWMæ¹å¼ã®ã¹ã¤ããã³ã°ã¬ã®ã¥ã¬ã¼ã¿ã³ã³
ããã¼ã©ã§ããåä½é»æºé»å§ã¯1.8Vãã10Vã§ããçºæ¯å¨æ³¢
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FEATURES
 Operation from 1.8V to 10.0V supply
 Adjustable output voltage
 High speed adjustable OSC: up to 1MHz
 Incorporates a soft start circuit
 Incorporates a short circuit detection of a timer-latch
 Totem-pole type output in which drive current is
adjustable using an switching resistor: pin 4
 1µA or less shutdown current
 Small package: SOT23L-8
 ä½åä½æä½é»æºé»å§: VOP=1.8~10.0V
 åºåé»å§èª¿æ´å¯è½
 é«éåä½ãå¯è½: æ大1MHz
 ã½ããã¹ã¿ã¼ãåè·¯å
èµ
 ã¿ã¤ãã¼ã©ããå¼ç絡æ¤åºåè·¯å
èµ
 åºåã¯ãã¼ãã ãã¼ã«å½¢å¼ã§ã¹ã¤ããã³ã°Tr.ãã©ã¤ãé»æµèª¿æ´å¯è½
(NPNã¹ã¤ããã³ã°ãã©ã³ã¸ã¹ã¿å¯¾å¿)
 1µA以ä¸ã®ã·ã£ãããã¦ã³é»æµ
 å°åããã±ã¼ã¸: SOT23L-8
APPLICATIONS
 The White LED Driving Systems: 2 to 48 or more
For Back-lighting and Front-lighting, Flashlights etc.
Mobile Communication Systems:
Cellular Phone, PHS, DSC, PDA,
Computer Peripheral Equipment
Battery & Dry Cell Battery Systems
Portable Equipment
 Step-up DC-DC Converter (Voltage Supply)
Camera, Radio, Communications Equipment etc
 VCD Bias
 ç½è²LEDé§åã·ã¹ãã :
 ããã¯ã©ã¤ã, ããã³ãã©ã¤ã, ãã©ãã·ã¥ã©ã¤ããªã©
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ã³ã³ãã¥ã¼ã¿å¨è¾ºæ©å¨
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 VCDãã¤ã¢ã¹
PACKAGE OUTLINE
Part name
Package
TK11840L-G
SOT23L-8
ORDERING INFORMATION
Marking Pin configuration
Ordering information
TK11840LTL - G
D40
See next
page
Package code
L: SOT23L-8
Environment code
G: Lead free
Storage direction
TL: Left type
ABSOLUTE MAXIMUM RATINGS
Parameter
Operating Voltage Range
Operating Temperature Range
Power Dissipation
Operating Frequency Range
é
ç®
åä½é»å§ç¯å²
åä½æ¸©åº¦ç¯å²
許容æ¶è²»é»å
åä½å¨æ³¢æ°ç¯å²
Symbol è¨å·
VOP
TOP
PD
fOP
Rating å®æ ¼
1.8 to 10.0
-20 to +85
400
to 1
Unit åä½
V
°C
mW
MHz
Remarks
åè
2005 SPRING
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