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TK11855F-G Datasheet

  • TK11855F-G

  • Step-up DC-DC converter IC

  • 2頁

  • TOKO   TOKO

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POWER&RF
Step-up DC-DC converter IC
鏄囧湩鍨婦C-DC銈熾兂銉愩兗銈縄C
TK11855F-G
DESCRIPTION
The TK11855F-G is a PWM step-up DC-DC converter IC
designed for white LED driver applications suitable for 2 to 4
LEDs in series.
The white LEDs are connected in series and driven at a
constant current, resulting in uniform brightness and high
efficiency.
Its reference voltage is a very low 0.5V, achieving high
efficiency operation with the constant current output.
It can also be used in general applications as a step-up DC-
DC converter.
TK11855F-G銇洿鍒椼伀鎺ョ稓銇曘倢銇?~4鐏伄錕?frac12;鑹睱ED椐嗗嫊銇渶
閬┿仾PWM鏂瑰紡鏄囧湩鍨婦C-DC銈熾兂銉愩兗銈縄C銇с仚銆?/div>
錕?frac12;鑹睱ED鐩村垪鎺ョ稓銆佸畾闆繪祦椐嗗嫊妲嬫垚銇с€佽紳搴︺儬銉┿亴灝戙仾銇忋€?/div>
楂樺姽鐜囥仹鍕曪拷½錕姐仐銇俱仚銆?/div>
鍩烘簴闆誨湩銇?.5V銇拷½錕姐亸銆佸畾闆繪祦鍑哄姏銇ч珮鍔圭巼銇с仚銆?/div>
涓€鑸殑銇槆鍦у瀷DC-DC銈熾兂銉愩兗銈褲仺銇椼仸銈傦拷½錕界敤鍙拷½銇с仚銆?/div>
FEATURES
Very High Efficiency 85%
Operating Voltage Range 2.65V to 16V
Operating Frequency 570kHz
Maximum Duty Cycle 85%
Built in Switching Transistor
Built in Open-circuit protection
On/off Control
Very Small Inductor Available
0.75mm Low Profile Package SON3024-8
楂樺姽鐜?5錛?/div>
鍕曪拷½錕介浕鍦х瘎鍥?/div>
2.65V to 16V
鍕曪拷½錕藉懆娉㈡暟
570kHz
鏈€澶с儑銉ャ兗銉嗐偅銉箋偟銈ゃ偗銉?/div>
85錛?/div>
銈廣偆銉冦儊銉熾偘銉堛儵銉熾偢銈廣偪鍐呰數(shù)
鍑哄姏銈兗銉椼兂淇濊鍥炶礬鍐呰數(shù)
On/off銈熾兂銉堛儹銉箋儷姍燂拷½
灝忓瀷銈熾偆銉拷½錕界敤鍙拷½
0.75mm钖勶拷錕斤拷銉戙儍銈便兗銈窼ON3024-8
APPLICATIONS
The White LED Driving Systems: 2 to 4
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
錕?frac12;鑹睱ED椐嗗嫊銈楓偣銉嗐儬:
銉愩儍銈儵銈ゃ儓, 銉曘儹銉熾儓銉┿偆銉? 銉曘儵銉冦偡銉ャ儵銈ゃ儓銇仼
銉儛銈ゃ儷閫氫俊姍熷櫒:
鎼哄腐闆昏┍銆丳HS銆丏SC銆丳DA銆?/div>
銈熾兂銉斻儱銉箋偪鍛ㄨ競姍熷櫒
銉愩儍銉嗐儶銉奸鍕曟鍣?/div>
鎼哄腐姍熷櫒
鏄囧湩鍨婦C-DC銈熾兂銉愩兗銈?/div>
銈儭銉┿€併儵銈搞偑銆併仢銇粬閫氫俊姍?/div>
VCD銉愩偆銈偣
PACKAGE OUTLINE
Part name
TK11855F-G
Package
Marking Pin configuration
AB0
See next
page
ORDERING INFORMATION
Ordering information
T K 1 1 8 5 5 F T L - G
SON3024-8
Package code
F: SON3024-8
Environment code
G: Lead free
Storage direction
TL: Left type
ABSOLUTE MAXIMUM RATINGS
Parameter
Operating Voltage Range
Operating Temperature Range
Power Dissipation
闋呯洰
Symbol
璦樺彿
鍕曪拷½錕介浕鍦х瘎鍥?/div>
V
OP
鍕曪拷½錕芥俯搴︾瘎鍥?/div>
T
OP
璦卞娑堣不闆誨姏
P
D
Rating
瀹氭牸
2.65 to 16.0
-30 to +85
600
Unit
鍗橈拷½錕?/div>
Remarks
鍌欒€?/div>
V
擄C
mW
Board mount
鍩烘澘瀹熻鏅?/div>
2005 SPRING

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