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UC3550 の電気的特性と機能

UC3550のメーカーはUnisonic Technologiesです、この部品の機能は「PWM/PFM SWITCHABLE STEP-UP DC-DC CONTROLLER」です。


製品の詳細 ( Datasheet PDF )

部品番号 UC3550
部品説明 PWM/PFM SWITCHABLE STEP-UP DC-DC CONTROLLER
メーカ Unisonic Technologies
ロゴ Unisonic Technologies ロゴ 




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UC3550 Datasheet, UC3550 PDF,ピン配置, 機能
UNISONIC TECHNOLOGIES CO., LTD
UC3550
CMOS IC
PWM CONTROLLED
PWM/PFM SWITCHABLE
STEP-UP DC-DC CONTROLLER
DESCRIPTION
The UTC UC3550 series is a compact, high efficiency, step-up
DC/DC controllers includes an error amplifier, oscillator, PWM
comparator, skip cycle comparator, voltage reference, soft-start,
and high speed lower ON-resistance driver for driving external
power devices (NMOS or NPN) ,Additionally, a CE (chip enable)
function that reduces power consumption during shut-down mode.
That typically operated from a single-or dual-cell battery packs. It
have a driver pin ,ext pin, for connecting to an external transistor
NMOS or NPN . a lower ON-resistance external transistor can
obtain larger output current. With only external components, this
series allow a simple means to accommodate high output current
applications.
The UTC UC3550 series goes automatically into skip switching
cycles under light load condition to maintain high efficiency.
www.DataSheet4U.com
FEATURES
* Input voltage range 0.9~8V
* Output voltage range 1.8~6V programmable in 0.1V with high
accuracy ± 2.5%
* High efficiency 88% typ.
* Low start-up voltage of 0.9V typical at IOUT = 1.0mA
* Oscillator frequency: 300kHz. 20%
* Chip enable pin with pull-up current source
* High output current up to 1000mA (VIN = 2.0V, VOUT =3.3V)
1
2
3
5
4
SOT-25
*Pb-free plating product number: UC3550L
ORDERING INFORMATION
Order Number
Normal
Lead Free Plating
UC3550-xx-AF5-R
UC3550L-xx-AF5-R
Package
SOT-25
Packing
Tape Reel
UC3550L-xx-AF5-R
(1)Packing Type
(2)Package Type
(3)Voltage Code
(4)Lead Plating
(1) R: Tape Reel
(2) AF5: SOT-25
(3) xx: reference to Marking Information
(4) L: Lead Free Plating, Blank: Pb/Sn
www.unisonic.com.tw
Copyright © 2005 Unisonic Technologies Co., Ltd
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UC3550 pdf, ピン配列
UC3550
BLOCK DIAGRAM
OUT 2
CMOS IC
NC 3
GND 4
+
- Error
Amplifier
-
~5mV +
Skip
COMP
Voltage reference
and soft start
PWM
COMP
Buffer
driver
Ramp
Oscillator
120nA
CE 1
5 EXT
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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UC3550 電子部品, 半導体
UC3550
TYPICAL STEP-UP CONVERTER APPLICATION
10uH
V IN
10uF
CE
1
OUT
2
NC
0.1µ 3
UTC
UC3550
EXT
5
GND
4
V OUT
220uF
Step -up Converter using external MOSFET
CMOS IC
VIN
10uF
10uH
CE
1
OUT
2
NC
0.1µ 3
UTC
UC3550
EXT
5
GND
4
Cb 3000P
Rb 560
Step -up Converter using external NPN
Recommended components
NmosTr XP161A0390PR/ (Torex) or NTGS3446T1
L 10Uh(sunida CD54 fosc 300kHz)
SD MA737, or MBRM110L
Cin 10V 10uF (tantalum)
CL 16V220uF (tantalum)
ON SEMI
NPN Tr type
Tr 2SD1628(Sanyo) MMJT9410
Rb 500 1000(Adjust according to load and Tr. hFE levels)
Cb 3000p ceramic type
VOUT
220 uF
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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[ UC3550 データシート.PDF ]


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共有リンク

Link :


部品番号部品説明メーカ
UC3550

PWM/PFM SWITCHABLE STEP-UP DC-DC CONTROLLER

Unisonic Technologies
Unisonic Technologies
UC3551

ADVANCED PWM STEP-UP DC-DC CONVERTER

Unisonic Technologies
Unisonic Technologies
UC3552

PWM DC-DC CONVERTER

Unisonic Technologies
Unisonic Technologies


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