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What is FA3641N?

This electronic component, produced by the manufacturer "Fuji Electric", performs the same function as "PWM control IC with light load power saving function For Switching Power Supply Control".


FA3641N Datasheet PDF - Fuji Electric

Part Number FA3641N
Description PWM control IC with light load power saving function For Switching Power Supply Control
Manufacturers Fuji Electric 
Logo Fuji Electric Logo 


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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

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FA3641N equivalent
FA3641P(N), FA3647P(N)
s Characteristic curves (Ta=25˚C)
Oscillation frequency (fosc) vs.
timing resistor resistance (RT)
1000
100
VCC = 18V
FB = 1.5V
10
1 10 100
Rt [k]
Oscillation frequency (fosc) vs.
junction temperature (Tj)
105
Rt = 47k
104 FB = 2.5V
103
102
101
100
99
98
97
50
0 50 100
Tj [°C]
Supply current (Icc) vs. supply voltage (Vcc)
Operating mode
2
1000
150
1.95
1.9
1.85
1.8
1.75
10
Rt = 47k
FB = 0V
15
20
Vcc [V]
62
25
30
Oscillation frequency (fosc) vs. supply voltage (Vcc)
105
104
103
102
101
100
99
98
97
96
95
10
OUT = No load
Rt = 47 k
FB = Open, CS = 3V
15 20
Vcc [V]
25
30
L-level output vltage (VOL) vs. supply voltage (Vcc)
1
0.8
0.6
0.4
0.2
Io = 100 mA
0
10 15 20
Vcc [V]
25
30
Supply current (Icc) vs. junction temperature (Tj)
Operating mode
2
1.95
1.9
1.85
1.8
1.75
50
Rt = 47k
Vcc = 18V
FB = 0V
0
50
Tj [°C]
100
150


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Part Details

On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for FA3641N electronic component.


Information Total 21 Pages
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Featured Datasheets

Part NumberDescriptionMFRS
FA3641The function is PWM control IC with light load power saving function For Switching Power Supply Control. Fuji ElectricFuji Electric
FA3641The function is FA3641. Fuji ElectricFuji Electric
FA3641NThe function is PWM control IC with light load power saving function For Switching Power Supply Control. Fuji ElectricFuji Electric

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