FA5695 Datasheet, PDF (7/21 Pages) Fuji Electric – Fuji Switching Power Supply Control IC

FA5695
(3)Electrical Characteristics (Unless otherwise specified, Ta=25°C, Vcc=12V, Vfb=1.0V,
Vcomp=5.0V, Rrt=82kΩ、Vovp=1.0V, Vis=100mV)
ERROR AMPLIFIER (FB,COMP Pin)
Item
Voltage Feedback Input
Threshold
Line Regulation
Symbol
Vfb
Regline
Condition
Vcc=10V to 26V
MIN
2.465
-20
TYP
2.500
-10
MAX
Unit
2.535
V
-
mV
Temperature stability
Transconductance
Output current at startup
Output Current
VdT
Gm
Io_ss
Io
Tj=-30°C to +85°C
50
Source:V(FB)=1.0V -20
Source:V(FB)=1.0V -40
Sink:V(FB)=4.0V
30
±0.5
75
100
-40
-60
-60
-80
50
70
mV/°C
umho
uA
uA
RAMP OSCILLATOR (RT Pin)
Item
Symbol
Maximum on range
Tonmax
Maximum on range
(Soft start)
Maximum oscillating frequency
RT output voltage
Tonmax_
soft-start
Fmax
Vrt
Condition
V(COMP)=5.0V
V(FB)=Vfb
V(COMP)=5.0V
V(FB)=1.0V
V(COMP)=1.0V
MIN
24
18
340
0.90
TYP
30
24
400
1.15
MAX
Unit
36
Us
30
us
460
kHz
1.40
V
PWM comparator (COMP Pin)
Item
Symbol
Input threshold voltage
Vthcomp
Condition
MIN
0.6
TYP
0.7
MAX
Unit
0.8
V
SOFT START (FB Pin)
Item
Soft start cancellation voltage
Symbol
Vthsoft
Condition
V(COMP)=5.0V
Ton>Tonmax*90%
MIN
TYP
MAX
Unit
0.94*Vfb
V
OVERVOLTAGE COMPARATER (FB Pin)
Item
Symbol
Static OVP threshold voltage
Vsovph
Vsovpl
Dynamic OVP
threshold voltage
Vsovphys
Vdovp
Condition
V(FB)=2.5V→3.0V
V(FB)=3.0V→2.5V
Vsovph-Vsovpl
V(FB)=2.5V→3.0V
Ton=Tonmax*70%
MIN
TYP
MAX
Unit
1.060*Vfb 1.080*Vfb 1.095*Vfb V
1.020*Vfb 1.040*Vfb 1.060*Vfb V
0.030*Vfb 0.040*Vfb 0.060*Vfb V
1.025*Vfb 1.050*Vfb 1.075*Vfb V
FB SHORT COMPARATOR (FB Pin)
Item
Symbol
Input threshold voltage
Pull-up current
Vthfb
Ipullup
Condition
V(FB)=2.5V
MIN
0.1
1.2
TYP
0.3
1.8
MAX
Unit
0.5
V
2.4
uA
CURRENT SENSE COMPARATOR (IS Pin)
Item
Symbol
Condition
IS threshold voltage
Vthis
IS threshold voltage
temperature characteristics
Output delay
Zero current detection voltage
Vthisdt
Tphl
Vzcd
Tj=-30°C to +85°C
Zero current detection delay
Tzcd
MIN
-0.58
-1.5
-
-15.0
0.3
TYP
-0.60
200
-10.0
0.9
MAX
Unit
-0.62
V
1.5
%
500
ns
-5.0
mV
1.5
us
Fuji Electric Co., Ltd.
AN-073E Rev.1.1
April-2011
7
http://www.fujielectric.co.jp/products/semiconductor/