FA5626 FUJI [Fuji Electric], FA5626 Datasheet - Page 9

• Manufacturer Part Number: FA5626
• Description: Fuji Switching Power Supply Control IC
• Manufacturer: FUJI [Fuji Electric]

AN-071E Rev.1.2
April-2011
Pulse width modulation section (FB pin)
Over load protection and auto-restart circuit section (FB pin)
Switching oscillator section (FB pin)
*3-1 After IC starts, the voltage at LAT pin rises to Vss1.
*4-1：When input voltage at VH pin is DC, this function doesn’t operate.
Fuji Electric Co., Ltd.
Center oscillation frequency
Voltage stability
Temperature stability *1
Frequency modulation width
*1
Frequency modulation period
*1
FB pin threshold voltage for
stop frequency modulation *1
FB pin threshold voltage for
light load mode
FB pin voltage at minimum
frequency
Oscillation
reduction ratio
Minimum
frequency
Maximum duty cycle
Minimum duty cycle
Input threshold voltage
FB pin source current
Minimum ON pulse width
*4-1
VH voltage detected change
Minimum ON pulse width *1
Over
threshold voltage *1
Over load detection Delay
time *1
Waiting time of auto restart
*1
load
Item
Item
Item
detection
frequency
oscillation
VHVTH1
TdOLP2
VthOLP
Symbol
Symbol
VthFB0
Symbol
Tfmodu
TdOLP
Vfbmst
Tmin1
Tmin2
Tmin3
Dmax
Vfmin
⊿Fdt
Dmin
Fosc
Vfbm
Fmin
Ifb0
Fdv
Fm
Kf
VFB=Increasing
VFB=VthOLP
VFB=VthOLP
VFB=2V
VCC=12 to 24V
VFB=2V
Tj=-30 to 125°C
VFB=2V
VFB=2V
VFB=2V
VFB=Decreasing
VLAT=1.8V *3-1
VFB=Decreasing
VLAT=1.8V *3-1
VFB=Decreasing
⊿f/⊿VFB
VLAT=1.8V *3-1
⊿VFB=Vfbm-Vfmin
VLAT=1.8V *3-1
VFB=0.5V
VFB=4.5V
VFB=0V
VFB=Decreasing
DUTY=0%
VFB=0V,
VLAT=1.8V
Steady
VVH<
VHVTH1 DC *1
Steady
VVH>=
VHVTH1 DC *1
Start (Restart) / over load
*4-1
FA5626
Condition
Condition
Condition
Full & Half-wave
rectification
Full & Half-wave
rectification
9
1200
1200
MIN.
MIN.
MIN.
1.45
0.25
-320
340
900
180
120
1300
7.0
1.7
1.1
3.5
60
±5
80
75
-5
－
-2
60
http://www.fujielectric.co.jp/products/semiconductor/
1700
1250
1700
1530
TYP.
TYP.
TYP.
1.55
0.45
-260
280
210
110
8.0
1.8
1.2
4.2
65
－
±7
85
400
70
－
－
MAX.
MAX.
MAX.
2200
1600
2200
1.65
0.65
-200
140
460
380
260
1760
9.0
1.3
5.0
+5
70
+2
±9
95
1.9
0
80
kHz/V
Unit
kHz
kHz
Unit
Unit
ms
mV
ms
ms
uA
ns
ns
ns
%
%
%
%
%
V
V
V
V
V