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VVP3120-ADJ の電気的特性と機能

VVP3120-ADJのメーカーはFSCです、この部品の機能は「52KHZ 3A PWM BUCK DC/DC CONVERTER」です。


製品の詳細 ( Datasheet PDF )

部品番号 VVP3120-ADJ
部品説明 52KHZ 3A PWM BUCK DC/DC CONVERTER
メーカ FSC
ロゴ FSC ロゴ 




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VVP3120-ADJ Datasheet, VVP3120-ADJ PDF,ピン配置, 機能
52KHZ 3A PWM BUCK DC/DC CONVERTER
„ FEATURES
z Output voltage: 3.3V, 5.0V, 12V, and adjustable
output version
z Adjustable version output voltage range:1.23V to
37V±4%
z 52KHz±15% fixed switching frequency
z Voltage mode non-synchronous PWM control
z Thermal-shutdown and current-limit protection
z ON/OFF shutdown control input
z Operating voltage can be up to 40V
z Output load current: 3A
z Low power standby mode
z Built-in switching transistor on chip
z TO220-5L,TO263-5L packages
„ APPLICATIONS
z Simple High-efficiency step-down regulator
z On-card switching regulators
z Positive to negative converter
„ PIN CONFIGURATION
(1) TO220-5L
(Top View)
VVP3120
„ GENERAL DESCRIPTION
The VVP3120 series are monolithic IC that design for
a step-down DC/DC converter, and own the ability of
driving a 3A load without additional transistor
component. Due to reducing the number of external
component, the board space can be saved easily.
The external shutdown function can be controlled by
logic level and then come into standby mode. The
internal compensation makes feedback control have
good line and load regulation without external design.
Regarding protected function, thermal shutdown is to
prevent over temperature operating from damage,
and current limit is against over current operating of
the output switch. The VVP3120 series operates at a
switching frequency of 52 KHz thus allowing smaller
sized filter components than what would be needed
with lower frequency switching regulators. Other
features include a guaranteed ±4% tolerance on
output voltage under specified input voltage and
output load conditions, and ±15% on the oscillator
frequency. The output version included fixed 3.3V,
5V, 12V, and an adjustable type. The packages are
available in a standard 5-lead TO-220 package
5-lead TO-263 package.
(2) TO263-5L
(Top View)
5 SD
4 FB
3 GND
2 OUTPUT
1 VIN
5 SD
4 FB
3 GND
2 OUTPUT
1 VIN
Metal Tab Gnd
Metal Tab Gnd
Symbol
1
2
3
4
5
Name
Vin
Output
Gnd
FB
SD
Descriptions
Operating Voltage Input
Switching Output
Ground
Output Voltage Feedback Control
ON/OFF Shutdown
1/9

1 Page





VVP3120-ADJ pdf, ピン配列
52KHZ 3A PWM BUCK DC/DC CONVERTER
VVP3120
„ ELECTRICAL CHARACTERISTICS (ALL OUTPUT VOLTAGE VERSIONS)
Unless otherwise specified, VIN=12V for 3.3V,5V, adjustable version and VIN=24V for the 12V version. ILOAD=0.5A
Symbol
Paramrter
Conditions
Min.
Typ.
Max.
Unit
IB
Feedback bias current
VFB=1.3V(Adjustable
version only)
40
50
100
nA
FOSC Oscillator frequency
44
38
52
60
66
KHz
VSAT
DC
Saturation voltage
Max.Duty Cycle(ON)
Min.Duty Cycle(OFF)
IOUT=3A
no outside circuit
VFB=0V force driver on
VFB=0V force driver on
VFB=12V force driver off
Peak current
0
1.16
1.4
100
V
%
ICL
Current limit
no outside circuit
3.6
6.9 A
VFB=0V force driver on
IL
Output=0
Output no outside circuit
leakage VFB=12V force driver off
50 µA
Output=-1 current VIN=40V
5 30 mA
IQ Quiescent Current
VFB=12V force driver off
7.8 10 mA
ISTBY
Standby Quiesient
Current
ON/OFF Pin=5V
VIN=40V
85 200 µA
VIL ON/OFF pin logic input Low(regultaor ON)
VIH threshold voltage
High(regultaor OFF)
2.0
1.4
0.6
V
IH
ON/OFF pin logic input
current
VLOGIC=2.5V(OFF)
IL
ON/OFF pin input
current
VLOGIC=0.5V(ON)
θJC Thermal Resistence
TO220-5L Junction
TO263-5L to case
Thermal Resistence
θJA
With copper area of
approximately 3 in2
TO220-5L Junction
TO263-5L to ambient
6 15
µA
0.02 5
2.5
3.5
/W
28 /W
30
„ ELECTRICAL CHARACTERISTICS (CONTINUED)
VVP3120-ADJ
Symbol
VFB
η
Parameter
Output Feedback
Efficiency
Conditions
4.5VVIN40V
0.2AILOAD3A
VOUT programmed for
3V
VIN =12V, ILOAD =3A
Typ.
1.23
72
Limit
1.193/1.18
1.267/1.28
VVP3120-3.3V
VOUT
Output voltage
5VVIN40V
0.2AILOAD3A
3.3
3.168/3.135
3.432/3.465
η
Efficiency
VIN =12V, ILOAD =3A
72
VVP3120-5V
VOUT
Output voltage
7VVIN40V
0.2AILOAD3A
5
4.8/4.75
5.2/5.25
η
Efficiency
VIN =12V, ILOAD =3A
79
VVP3120-12V
VOUT
Output voltage
15VVIN40V
0.2AILOAD3A
12
11.52/11.4
12.48/12.6
η
Efficiency
VIN =15V, ILOAD =3A
90
Specifications with boldface type are for full operating temperature range, the other type are for TJ=25ºC.
Unit
V
VMIN
VMAX
%
V
VMIN
VMAX
%
V
VMIN
VMAX
%
V
VMIN
VMAX
%
3/9


3Pages


VVP3120-ADJ 電子部品, 半導体
52KHZ 3A PWM BUCK DC/DC CONVERTER
VVP3120
„ FUNCTION DESCRIPTION
Pin Function
VIN
This is the positive input supply for the IC switching regulator. A suitable input bypass capacitor must be present at
this pin to minimize voltage transients and to supply the switching currents needed by the regulator.
Ground
Circuit ground.
Output
Internal switch. The voltage at this pin switches between (VIN – VSAT) and approximately – 0.5V, with a duty cycle
of approximately VOUT / VIN. To minimize coupling to sensitive circuitry, the PC board copper area connected to
this pin should be kept a minimum.
Feedback
Senses the regulated output voltage to complete the feedback loop.
ON/OFF
Allows the switching regulator circuit to be shutdown using logic level signals thus dropping the total input supply
current to approximately 150uA. Pulling this pin below a threshold voltage of approximately 1.3V turns the
regulator on, and pulling this pin above 1.3V (up to a maximum of 25V) shuts the regulator down. If this shutdown
feature is not needed, the ON/OFF pin can be wired to the ground pin or it can be left open, in either case the
regulator will be in the ON condition.
Thermal Considerations
The VVP3120 is available in three packages, a 5-pin TO-220, a 5-pin surface mount TO-263.
The TO-220 package needs a heat sink under most conditions. The size of the heat sink depends on the input
voltage, the output voltage, the load current and the ambient temperature. The VVP3120 junction temperature
rises above ambient temperature for a 3A load and different input and output voltages. The data for these curves
was taken with the VVP3120 (TO-220 package) operating as a buck switching regulator in an ambient
temperature of 25oC (still air). These temperature rise numbers are all approximate and there are many factors that
can affect these temperatures. Higher ambient temperatures require more heat sinking.
The TO-263 surface mount package tab is designed to be soldered to the copper on a printed circuit board. The
copper and the board are the heat sink for this package and the other heat producing components, such as the
catch diode and inductor. The PC board copper area that the package is soldered to should be at least 0.4 in2,
and ideally should have 2 or more square inches of 2 oz. Additional copper area improves the thermal
characteristics, but with copper areas greater than approximately 6 in2, only small improvements in heat
dissipation are realized. If further thermal improvements are needed, double sided, multilayer PC board with large
copper areas and/or airflow are recommended.
The VVP3120 (TO-263 package) junction temperature rise above ambient temperature with a 2A load for
various input and output voltages. This data was taken with the circuit operating as a buck switching regulator
with all components mounted on a PC board to simulate the junction temperature under actual operating
conditions. This curve can be used for a quick check for the approximate junction temperature for various
conditions, but be aware that there are many factors that can affect the junction temperature. When load
currents higher than 2A are used, double sided or multilayer PC boards with large copper areas and/or airflow
might be needed, especially for high ambient temperatures and high output voltages.
For the best thermal performance, wide copper traces and generous amounts of printed circuit board copper
should be used in the board layout. (Once exception to this is the output (switch) pin, which should not have
large areas of copper.) Large areas of copper provide the best transfer of heat (lower thermal resistance) to the
surrounding air, and moving air lowers the thermal resistance even further.
Package thermal resistance and junction temperature rise numbers are all approximate, and there are many
factors that will affect these numbers. Some of these factors include board size, shape, thickness, position,
location, and even board temperature. Other factors are, trace width, total printed circuit copper area, copper
thickness, single or double-sided, multilayer board and the amount of solder on the board. The effectiveness of
the PC board to dissipate heat also depends on the size, quantity and spacing of other components on the board,
as well as whether the surrounding air is still or moving. Furthermore, some of these components such as the
catch diode will add heat to the PC board and the heat can vary as the input voltage changes. For the inductor,
depending on the physical size, type of core material and the DC resistance, it could either act as a heat sink
taking heat away from the board, or it could add heat to the board.
6/9

6 Page



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VVP3120-ADJ

52KHZ 3A PWM BUCK DC/DC CONVERTER

FSC
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