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UC3380のメーカーはUnisonic Technologiesです、この部品の機能は「PWM STEP UP DC-DC CONTROLLER」です。 |
部品番号 | UC3380 |
| |
部品説明 | PWM STEP UP DC-DC CONTROLLER | ||
メーカ | Unisonic Technologies | ||
ロゴ | |||
このページの下部にプレビューとUC3380ダウンロード(pdfファイル)リンクがあります。 Total 9 pages
UNISONIC TECHNOLOGIES CO., LTD
UC3380
PWM STEP UP DC-DC
CONTROLLER
CMOS IC
DESCRIPTION
The UC3380 is PWM step up DC-DC switching controller that
operates from 0.9V. The low start up input voltage makes UC3380
specially designed for powering portable equipment from one or two
cells battery packs. This device consist of a soft start circuit, a reference
voltage source, an error amplifier, an oscillator, a phase compensation,
a PWM controller and an output drive circuit for driving external power
transistor.
Additionally, a chip enable feature is provided to power down the
converter for extended battery life. The device features a voltage mode
PWM control loop, providing stable and high efficiency operation over a
broad load current range.
FEATURES
* 0.9V Low Start-Up Input Voltage at 1mA Load
* Low Operation Current
* 0.5uA Low Shutdown Current
* Fix Frequency PWM at 300KHZ
* Built in PWM Switching Control Circuit ,Duty Ratio is 0~78%
* Output Voltage:0.1V Step Setting is Available Between 2.0V and 6.5V
* Soft Start Time: 3ms
* Shutdown Function
APPLICATIONS
*Portable Devices
*Electronic Games
*Portable Audio (MP3)
*Personal Digital Assistant (PDA)
*Digital still Cameras(DSC)
*Camcorders
*White LED Driver
*Single and Dual-Cell Battery Operated Products
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
UC3380L-xx-AF5-R
UC3380G-xx-AF5-R
Package
SOT-25
Packing
Tape Reel
www.unisonic.com.tw
Copyright © 2012 Unisonic Technologies Co., Ltd
1 of 9
QW-R502-099.D
1 Page UC3380
CMOS IC
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATINGS
UNIT
VOUT Pin Voltage
VOUT
12 V
SHUTDOWN Pin Voltage
VSHUTDOWN
VSS-0.3~12
V
EXT Pin Voltage
EXT Pin Current
VEXT
IEXT
-0.3~ VOUT+0.3
±80
V
mA
Power Dissipation
PD
250 mW
Operating Ambient Temperature
Storage Temperature
TOPR
TSTG
-40~+85
-40~ +125
°C
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
ELECTRICAL CHARACTERISTICS
Refer to the test circuit, TOPR=25°C, VIN=VOUT (S)*0.6, IOUT=VOUT (S)/50Ω, unless otherwise specified.
PARAMETER
SYMBOL
TEST
CIRCUIT
TEST CONDITION
MIN TYP
MAX
UNIT
TOTAL DEVICE
Output Voltage
Supply Current 1
VOUT
IS1
Supply Current 2
IS2
Input Voltage
VIN
Operation Holding Voltage VHOLD
Operation Start Voltage
Oscillation Start Voltage
Oscillation Frequency
Duty Ratio
Line Regulation
Load Regulation
Temperature Coefficient
Efficiency
Soft Start time
VST1
VST2
fOSC
Duty
⊿LNR
⊿LDR
ET
EF
Ts
2
VOUT
(S)*0.976
VOUT
(S)
VOUT
(S)*1.024
V
VOUT (S)15 to 19
33.8 56.4
VOUT (S)20 to 29
50.3 83.9
1
VOUT=
VOUT (S)30 to 39
VOUT (S)*0.95 VOUT (S)40 to 49
68.6 114.4
88.4 147.4
uA
VOUT (S)50 to 59
VOUT (S)60 to 65
109.4 182.4
131.6 219.3
VOUT (S)15 to 19
VOUT (S)20 to 29
9.7 19.4
9.9 19.7
1
VOUT=
VIN (S)+0.5V
VOUT (S)30 to 39
VOUT (S)40 to 49
10.0 20.0
10.2 20.4
uA
VOUT (S)50 to 59
10.4 20.7
VOUT (S)60 to 65
10.5 21.0
2 10 V
Measured by decreasing VIN
2 voltage gradually, when
0.7
V
IOUT=1mA.
2 IOUT=1mA
1
Increase the VIN until EXT pin
output the oscillating signal
0.9 V
0.8 V
1 VOUT=VOUT (S)*0.95
255 300 345 KHz
1 VOUT=VOUT (S)*0.95
2 VIN=VOUT (S)*0.4 to *0.6
70 78 85 %
30 60 mV
2 IOUT=10uA to VOUT (S)/50*1.25
2
⊿VOUT/(⊿TOPR*VOUT)
TOPR=-40°C ~ +85°C
2
30 60 mV
±50 ppm/°C
85 %
2 1.5 3.0 6.0 ms
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 9
QW-R502-099.D
3Pages UC3380
CMOS IC
APPLICATION CIRCUIT INFORMATION
The following equations show the relation of the basic design parameters.
1. Refer to the application circuit, the increasing inductor current when the switch is turn on is given by the following
equation
Δi L +
=
1
L
ULTON
=
1
L
(UIN
−
US
)
d
f
( UIN : input voltage: US : transistor saturation voltage)
The decreasing inductor current when the switch is turn off can derive by the equation below
ΔiL−
=
1
L
ULTOFF
=
−
1
L
(UO
+
UD
−
UIN
)
1−
f
d
( UD :diode forward voltage)
according to ΔiL+ + ΔiL− = 0 , the duty ratio is given by
d
=
UO
UO
+ UD
+ UD
− UIN
− US
2. The average current flowing through the inductor is
IL
=
IO
1− d
3. We note that
IO = (1− d )IL
then
we
can
write: IO
=
(1
−
d
)
IL
ΔiL
• ΔiL
substituting
ΔiL
=
1
L
ULTOFF
ΔiL
for equation above, output current is given by
IO
=
(1−
d
)
•
1
ICR
•
1
L
ULTOFF
( ICR = ΔiL )
IL
IO
=
(1−
d
)
•
1
ICR
•
1
L
(Uo
+ UD
−
UIN
)
1
−
f
d
IO
=
(1− d )2
•
UO + UD − UIN
ICR • L • f
derive that
4. The peak current of the inductor is given by
IPK
= IL
+
1
2
ΔiL
IPK
= IL
1
+2
ΔiL
IL
• IL
according to ICR = ΔiL
IL
IPK
= IL
+
1
2
ICR
•
IL
derive that
Then derive the following equation for peak current of inductor
IPK
= IL(1+
1
2
ICR )
5. Charge stores in C3 during charging up is given by ΔQ = IC •TOFF
we can write
ΔQ
=
(IL
−
IO
)
•
1−
f
d
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
6 of 9
QW-R502-099.D
6 Page | |||
ページ | 合計 : 9 ページ | ||
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PDF ダウンロード | [ UC3380 データシート.PDF ] |
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部品番号 | 部品説明 | メーカ |
UC3380 | PWM STEP UP DC-DC CONTROLLER | Unisonic Technologies |
UC3383 | STEP-UP DC/DC CONVERTERS | Unisonic Technologies |