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FA5304APS の電気的特性と機能

FA5304APSのメーカーはFuji Electricです、この部品の機能は「Bipolar IC For Switching Power Supply Control」です。


製品の詳細 ( Datasheet PDF )

部品番号 FA5304APS
部品説明 Bipolar IC For Switching Power Supply Control
メーカ Fuji Electric
ロゴ Fuji Electric ロゴ 




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FA5304APS Datasheet, FA5304APS PDF,ピン配置, 機能
FA5304AP(S)/FA5305AP(S) Bipolar IC
For SwitcFhAin5g30P4oAwPe(rSS)/uFpAp5l3y0C5oAnPt(rSo)l
s Description
The FA5304AP(S) and FA5305AP(S) are bipolar ICs for
switching power supply control and can directly drive a power
MOSFET. These ICs contain many functions in a small 8-pin
package. With these ICs, a high-performance power supply
can be created compactly because not many external
components are needed.
s Features
• Drive circuit for connecting a power MOS-FET (IO = ±1.5A)
• Wide operating frequency range (5 to 600kHz)
• Pulse-by-pulse overcurrent limiting function
Positive voltage detection: FA5304AP(S)
Negative voltage detection: FA5305AP(S)
• Overload cutoff function (Latch or non-protection mode
selectable)
• Output ON/OFF control function by external signals
• Overvoltage cutoff function in latch mode
• Undervoltage malfunction prevention function (ON at 16V
and OFF at 8.7V)
• Error amplifier for control by tertiary winding detection
• Low standby current (90µA typ.)
• 8-pin package (DIP/SOP)
s Applications
• Switching power supply for general equipment
s Dimensions, mm
SOP-8
8
5
14
6.05
0.4±0.1 1.27±0.2
DIP-8
8
5
1 9.3 4
1.5
0.6
2.54±0.25 0.5±0.1
0~15˚
7.6
0.3 +–00.1.05
0~15˚
1

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FA5304APS pdf, ピン配列
FA5304AP(S)/FA5305AP(S)
s Absolute maximum ratings
Common to FA5304AP(S) and FA5305AP(S)
Item
Supply voltage
Output current
Error amplifier input
voltage
Feedback terminal input voltage
Overcurrent detection
terminal input voltage
CS terminal input current
Total power dissipation
(Ta = 25°C)
Symbol
VCC
IO
VIN
VFB
VIS
ICS
Pd
Operating temperature
Storage temperature
Topr
Tstg
Rating
30
±1.5
4
4
–0.3 to +4
2
800 (DIP-8) *1
550 (SOP-8) *2
–30 to +85
–40 to +150
Unit
V
A
V
V
V
mA
mW
°C
°C
s Recommended operating conditions
Common to FA5304AP(S) and FA5305AP(S)
Item
Symbol
Supply voltage
VCC
Error amplifier feedback resistor RNF
Soft-start capacitor
CS
Oscillation frequency
fOSC
Min.
10
100
0.1
5
Max.
30
1
600
Unit
V
k
µF
kHz
Notes:
*1 Derating factor Ta > 25°C : 8.0mW/°C ( on PC board )
*2 Derating factor Ta > 25°C : 5.5mW/°C ( on PC board )
s Electrical characteristics (Ta=25°C, VCC=18V,fosc=135kHz)
Oscillator section Common to FA5304AP(S) and FA5305AP(S)
Item
Oscillation frequency
Frequency variation 1 (due to supply voltage change)
Frequency variation 2 (due to temperature change)
Symbol
fOSC
fdv
fdT
Test condition
CT = 360pF
VCC = 10 to 30V
Ta = –30 to +85°C
Min.
112
Typ.
135
±1
±4
Max.
148
Unit
kHz
%
%
Error amplifier section Common to FA5304AP(S) and FA5305AP(S))
Item
Reference voltage
Input bias current
Open-loop voltage gain
Unity-gain bandwidth
Maximum output voltage (Pin 2)
Output source current (Pin 2)
Symbol
VB
IB
AV
fT
VOM+
VOM–
IMO+
Test condition
V1 = 2V
RNF = 100k
RNF = 100k
VOM = 1V
Min.
1.90
–500
80
2.70
Typ.
2.00
–50
1.0
–100
Max.
2.10
200
–50
Unit
V
nA
dB
MHz
V
mV
µA
Pulse width modulation circuit section Common to FA5304AP(S) and FA5305AP(S)
Item
Input threshold voltage (Pin 2)
Maximum duty cycle
Symbol
VTH FBO
VTH FBM
DMAX
Test condition
Duty cycle = 0%
Duty cycle = DMAX
Min.
0.80
1.70
42
Typ.
1.00
1.90
45
Max.
1.20
2.10
50
Unit
V
V
%
Soft-start circuit section Common to FA5304AP(S) and FA5305AP(S)
Item
Charge current (Pin 8)
Input threshold voltage (Pin 8)
Symbol
ICHG
VTH CSO
VTH CSM
Test condition
Pin 8 = 0V
Duty cycle = 0%
Duty cycle = DMAX
Min.
–15
0.80
1.70
Typ.
–10
1.00
1.90
Max.
–5
1.20
2.10
Unit
µA
V
V
3


3Pages


FA5304APS 電子部品, 半導体
FA5304AP(S)/FA5305AP(S)
4. CS pin circuit
As shown in Figure 5, capacitor CS is connected to the CS pin.
When power is turned on, the constant current source (10µA)
begins to charge capacitor CS. Accordingly, the CS pin voltage
rises as shown in Figure 6. The CS pin is connected to an
input of the PWM comparator. The device is in soft-start mode
while the CS pin voltage is between 1.0V and 1.9V common to
FA5304A and FA5305A. During normal operation, the CS pin
is clamped at 3.6V by internal zener diode Zn. If the output
voltage drops due to an overload, etc., the clamp voltage shifts
from 3.6V to 8.0V. As a result, the CS pin voltage rises to 8.0V.
The CS pin is also connected to latch comparator C2. If the pin
voltage rises above 7.0V, the output of comparator C2 goes
high to turn off the bias circuit , thereby shutting the output
down. Comparator C2 can be used not only for shutdown in
response to an overload, but also for shutdown in response to
an overvoltage. Comparator C1 is also connected to the CS
pin, and the bias circuit is turned off and the output is shut
down if the CS pin voltage drops below 0.42V. In this way,
comparator C1 can also be used for output on/off control.
As explained above, the CS pin can be used for soft-start
operation, overload and overvoltage output shutdown and
output on/off control.
Further details on the four functions of the CS pin are given
below.
4.1 Soft start function
Figure 7 shows the soft start circuit. Figure 8 is the soft-start
operation timing chart. The CS pin is connected to capacitor
CS . When power is turned on, a 10µA constant-current source
begins to charge the capacitor. As shown in the timing chart,
the CS pin voltage rises slowly in response to the charging
current. The CS pin is connected internally to the PWM
comparator. The comparator output pulse slowly widens as
shown in the timing chart.
The soft start period can be approximately evaluated by the
period ts from the time the IC is activated to the time the output
pulse width widens to 30%. Period ts is given by the following
equation:
tS (mS) = 160CS (µF).................................(2)
Fig. 5 CS pin circuit
Fig. 6 CS pin waveform
Fig. 7 Soft-start circuit
Fig. 8 Soft-start timing chart
6

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部品番号部品説明メーカ
FA5304AP

Bipolar IC For Switching Power Supply Control

Fuji Electric
Fuji Electric
FA5304APS

Bipolar IC For Switching Power Supply Control

Fuji Electric
Fuji Electric


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