- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄375715 > FA5502 (FUJI ELECTRIC HOLDINGS CO., LTD.) POWER SUPPLY CONTROL IC PDF資料下載
參數(shù)資料
| 型號： | FA5502 |
| 廠商： | FUJI ELECTRIC HOLDINGS CO., LTD. |
| 英文描述： | POWER SUPPLY CONTROL IC |
| 中文描述： | 電源控制IC |
| 文件頁數(shù)： | 15/23頁 |
| 文件大小： | 215K |
| 代理商： | FA5502 |
15
Quality is our message
FA5502P/M
Z
P
frequency
v
G1
Fig.8 Voltage gain of CUR.AMP
(4) PWM comparator
Fig.9 shows the configuration of PWM comparator.
Oscillator output V
CT
and current error amplifier output
V
IFB
are compared. While V
CT
< V
IFB
, PWM
comparator output goes High and OUT pin also goes
High. Note that, during the oscillator discharge period,
OUT pin is forced to be Low, thereby determining the
maximum duty cycle. (see characteristics curve).
CS pin (pin 11) is a soft start pin. When start up, an
internal constant current (11μA (typ.)) charges
capacitor C4 for soft start. Priority is given to V
CS
or
V
IFB
whichever is lower. Fig.10 shows PWM
comparator timing chart.
11
11μA
CS
Oscillator output
(CT pin)
CUR.AMP output
(IFB pin)
C4
Output
circuit
V
CT
V
IFB
V
CS
PWM.COMP
7.5V
Fig.9 PWM comparator circuit
V
CT
V
CS
V
IFB
OUT
pin
Normal operation
t
t
V
CT
V
CS
V
IFB
OUT
pin
Operation with Dmax
t
t
Fig.10 PWM comparator timing chart
(5) Multiplier
The multiplier generates a current reference signal.
The rectified line voltage is divided down by resistor
and monitored by VDET pin (pin 3). Considering the
dynamic range of multiplier, design the R6 and R7 in
Fig.11 so that the peak voltage at VDET pin within a
range from 0.65V to 2.4V over the entire range of line
voltage. VFB pin is normally above 1.55V and, at this
status, multiplier output voltage Vm is approximately
expressed by:
VDET
V
VFB
V
)
55
.
(
K
25
.
Vm
×
×
=
(8)
Where
K: Output voltage factor (multiplier section)
When VFB pin is lower than 1.55V, compensation
circuit for light load operates.
As shown in Fig.7, Vm is applied via a resistor of
11 k
to inverting input (IIN-) of current error amplifier
CUR. AMP. (For input/output characteristics of
multiplier, see characteristics curve.)
ER.AMP output
(VFB pin)
MUL
3
V
VFB
V
VDET
VDET
Vm
V
IN
R7
R6
Fig.11 Multiplier circuit
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| FA5530 | Quasi-Resonant IC |
| FA5531 | Quasi-Resonant IC |
| FA5532 | Quasi-Resonant IC |
| FA57SA50LC | RxxP2xx Series - Econoline Unregulated DC-DC Converters; Input Voltage (Vdc): 05V; Output Voltage (Vdc): 12V; Power: 2W; EN 60950 certified, rated for 250VAC; UL-60950-1 / CSA C22.2 certified; 5.2kVDC Isolation for 1 Minute; Optional Continuous Short Circuit Protected; Wide Operating Temperature Range atfull 2 Watts Load, ?40??C to +85??C; Twin Chamber Transformer System; UL94V-0 Package Material; Efficiency to 80% |
| FA7611 | Bipolar IC For Switching Power Supply Control |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FA5502M-H1 | 制造商:Fuji Electric 功能描述: |
| FA5502M-TE1 | 制造商:Fuji Electric 功能描述:1.5 A POWER FACTOR CONTROLLER, 150 kHz SWITCHING FREQ-MAX, 16 Pin Plastic SOP 制造商:Fuji Semiconductors, Inc. 功能描述:1.5 A POWER FACTOR CONTROLLER, 150 kHz SWITCHING FREQ-MAX, 16 Pin Plastic SOP |
| FA5502P/M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:FA5502P/M is a control IC for a power factor correction system. |
| FA5502P-A2 | 制造商:Fuji Electric 功能描述: |
| FA5504P-D1 | 制造商:Fuji Electric 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。