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FA3641 の電気的特性と機能

FA3641のメーカーはFuji Electricです、この部品の機能は「PWM control IC with light load power saving function For Switching Power Supply Control」です。


製品の詳細 ( Datasheet PDF )

部品番号 FA3641
部品説明 PWM control IC with light load power saving function For Switching Power Supply Control
メーカ Fuji Electric
ロゴ Fuji Electric ロゴ 




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FA3641 Datasheet, FA3641 PDF,ピン配置, 機能
FA3641P(N), FA3647P(N)FA3641P(N), FA3647P(N)
PWM control IC with light load power saving function
For Switching Power Supply Control
s Description
The FA3641P(N) and FA3647P(N) are the PWM type switching
power supply control ICs that can directly drive power MOSFET.
These ICs use a CMOS device with high dielectric strength
(30V) to implement low power consumption. They feature a
number of functions that are equivalent to those of the FA531X
series consisting of bipolar devices. In addition, they have a
function that reduces the oscillation frequency to suppress loss
of the power supply in light load mode and support an
overvoltage protection detecting Vcc voltage. These ICs are
most suitable for high-performance, energy-saving power
supplies that require low input power in standby or no-load
mode.
s Features
Uses a newly developed CMOS process with high dielectric
strength (30V) for implementing low power consumption
Standby current of 2µA or less (at Vcc=14V), and operating
current of 1.9mA (typ.)
Automatically reduces the oscillation frequency to suppress
loss of the power supply in light load mode
Overvoltage protection function detecting Vcc voltage
A drive circuit for connecting a power MOSFET directly
Output peak current: Source current 500mA
Sink current
+1A
Pulse-by-pulse overcurrent limiting function
Overload cutoff function (latch or non-latch mode selectable)
Output ON/OFF control function by external signal
Latch mode overvoltage shutdown function
Undervoltage lockout function
(16.5V ON / 9V OFF)
Reference voltage output (5V)
8-pin package (DIP/SOP)
s Dimensions, mm
SOP-8
85
14
4.9
0.4±0.1 1.27±0.2
DIP-8
8
5
1 9.3 4
1.5
2.54±0.25 0.46±0.1
7.62
0~15˚
0.25+00.1.05
0~15˚
58

1 Page





FA3641 pdf, ピン配列
FA3641P(N), FA3647P(N)
s Recommended operating condition
Item
Supply voltage
REF pin bypass capacitor
Soft-start capacitor
Oscillation frequency (FB >1.2V)
Min.oscillation frequency at light load mode (FB <1.2V)
Symbol
VCC
Cref
CS
fOSC
fOSCL
Min.
10
0.1
0.01
30
10
Typ.
0.47
Max.
28
1
500
Unit
V
µF
µF
kHz
kHz
s Electrical characteristics (Vcc=18V, RT=47k, Ta=25˚C)
Reference voltage section
Item
Reference voltage
Voltage variation 1 (Line regulation)
Voltage variation 2 (Load regulation))
Voltage variation 3 (Temperature stability)
Symbol
VREF
VdV
VdV
VdT
Test condition
Tj=25˚C
VCC=10 to 28V
IL=0 to 10mA, Vcc=18V
Ta= 30 to +85°C
Min.
4.75
Typ.
5.00
±6
±6
±0.5
Max.
5.25
±20
±20
Unit
V
mV
mV
mV/°C
Oscillator section
Item
Oscillation frequency
Frequency variation 1 (Voltage stability)
Frequency variation 2 (Temperature stability)
Symbol
fOSC
fdV
fdT
Test condition
RT=47k, Tj=25˚C
VCC=10 to 28V
Ta= 30 to +85°C
Min.
92.6
Typ.
100
±1.6
±0.02
Max.
107.4
Unit
kHz
%
% / °C
Pulse width modulation circuit section
Item
FB pin source current
Input threshold voltage (FB pin)
Maximum duty cycle
Symbol
IFB
VTH FBO
VTH FBM
DMAX
Test condition
VFB=0V
Duty cycle =0%
Duty cycle =DMAX
VFB=2.5V
Min.
985
0.95
66
Typ.
750
1.03
2.40
70
Max.
615
74
Unit
µA
V
V
%
Reducing oscillation frequency section
Item
FB pin threshold voltage
Frequency reduction
Minimum oscillation frequency
Symbol
VTH FBS
kfS1
foscS2
Test condition
VFB=1.10 to 1.15V
Min.
Typ.
1.18
16.7
46
Max.
Unit
V
kHZ
kHZ
Overcurrent limiting circuit section
Item
Input threshold voltage (IS pin)
Input terminal source current (IS pin)
Delay time
Symbol
VTH IS
I IS
TPD IS
Test condition
VIS =0V
FA3641P/N
Min. Typ.
215 235
150
FA3647P/N
Unit
Max. Min. Typ. Max.
255 188 168 148 mV
5 20 µA
150 ns
Soft-start circuit section
Item
Charge current (CS pin)
Input threshold voltage (CS pin)
Symbol
ICHG
VTH CSO
VTH CSM
Test condition
VCS =1V, Tj=25˚C
Duty cycle =0%
Duty cycle =DMAX
Min.
4.0
0.95
Typ.
6.5
1.03
2.40
Max.
9.0
Unit
µA
V
V
60


3Pages


FA3641 電子部品, 半導体
Supply current (Icc) vs. supply voltage (Vcc)
Latch mode
200
160
120
80
40
0
10 12 14 16 18 20
Vcc [V]
Supply current (Icc) vs. supply voltage (Vcc)
OFF mode
200
160
120
80
40
0
10 12 14 16 18 20
Vcc [V]
UVLO OFF-to-ON thrreshold voltage (Vcc on) vs.
junction temperature (Tj)
1.7
16.8
16.6
16.4
16.2
16
50
0 50 100 150
Tj [°C]
FA3641P(N), FA3647P(N)
Supply current (Icc) vs. supply voltage (Vcc)
Latch mode
3000
2500
2000
1500
1000
500
0
10 15 20
25 30
Vcc [V]
Supply current (Icc) vs. supply voltage (Vcc)
OFF mode
3000
2500
2000
1500
1000
500
0
10 15 20
25 30
Vcc [V]
UVLO ON-to-OFF thrreshold voltage (Vcc off) vs.
junction temperature (Tj)
9.2
9.1
9
8.9
8.8
50
0 50 100 150
Tj [°C]
63

6 Page



ページ 合計 : 21 ページ
 
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部品番号部品説明メーカ
FA3641

PWM control IC with light load power saving function For Switching Power Supply Control

Fuji Electric
Fuji Electric
FA3641

FA3641

Fuji Electric
Fuji Electric
FA3641N

PWM control IC with light load power saving function For Switching Power Supply Control

Fuji Electric
Fuji Electric
FA3641P

PWM control IC with light load power saving function For Switching Power Supply Control

Fuji Electric
Fuji Electric


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