FA5604 Datasheet, PDF (7/31 Pages) Fuji Electric – FUJI Power Supply Control IC

FA5604/5605/5606

(3)Electrical Characteristics (Tj=25°C,VCC=18V,Rt=12kΩ,unless otherwise specified)
Oscillator Section (RT pin)
Item
Symbol
Conditions
MIN.
Switching oscillation frequency
Fosc Rt=12kΩ, Tj=25°C
171
Variation by supply voltage
Fdv VCC=11V to 30V
-2
Variation by temperature
FdT Tj= -40°C to +125°C
-
TYP.
190
-
0.05
MAX.
209
+2
-
Unit
kHz
%
%/°C
Pulse Width Modulation Section (FB pin)
Item
Symbol
Source current of FB pin
IFB
Input threshold voltage
VthFB0
VthFBM
Maximum duty cycle
DMAX
OLP threshold voltage
Hysteresis voltage width
Volpon
Volpoff
Volphys
Conditions
FB=0V
Duty cycle=0%
Duty cycle=DMAX
FB=3.25V
FA5604
FA5605/06
OLP mode OFF  ON
OLP mode ON  OFF
MIN.
-650
0.9
2.7
43
67
3.2
3.0
0.1
TYP.
-500
1.0
3.0
46
70
3.5
3.3
0.2
MAX. Unit
-390
A
1.1
V
3.25
V
49
%
73
3.8
V
3.6
V
0.3
V
Frequency Control Section at Light Load (FB pin)
Item
Symbol
Conditions
Input threshold voltage
Light Load mode
VthFBS1
OFFON
Light Load mode
VthFBS2
ONOFF
FA5604/05
FA5606
FA5604/05
FA5606
Difference of switching frequency
RT=24kΩ
Foscdiff1
FB=VthFBS
FA5604
FA5605/06
Minimum switching frequency
FoscS2 FB=VthFB0
Minimum on pulse width
tminS FB=VthFB0
MIN.
1.65
1.43
1.8
1.53
-15
-10
24
300
TYP.
1.80
1.55
1.95
1.65
-7.5
-5
30
400
MAX. Unit
1.95
1.67
V
2.1
1.77
0
%
0
39
%
500
ns
Current Sense Section (IS pin)
Item
Input threshold voltage
Source current of IS pin
Propagation delay time
Symbol
VthIS
IIS
tpdIS
IS=0V
Conditions
MIN.
-183
-52
100
TYP.
-170
-40
150
MAX. Unit
-157 mV
-28
A
250
ns
ON/OFF, Soft-start Section (CS pin)
Item
Charge current of CS pin
ON/OFF threshold voltage
Hysteresis voltage width
Soft-start input voltage
Symbol
ICS0
Vcson1
Vcsoff1
Vcshys1
VthCS0
VthCSM
Conditions
CS=0V
OFFON
ONOFF
0VVthCSM
Duty cycle = 0%
VthCSM0V
Duty cycle = DMAX
MIN.
-13
0.65
0.50
0.1
0.65
0.5
2.75
TYP.
-10
0.75
0.60
0.15
0.75
0.6
3.0
MAX. Unit
-7
A
0.90
V
0.75
V
0.2
V
0.9
V
0.75
3.25
V
Fuji Electric Co., Ltd.
AN-033E Rev.1.2
April-2011
7
http://www.fujielectric.co.jp/products/semiconductor/