SG6905SZ

Manufacturer Part NumberSG6905SZ
DescriptionIC PWM CTLR PFC/FLYBACK 20-SOP
ManufacturerFairchild Semiconductor
SG6905SZ datasheet
 


Specifications of SG6905SZ

ModeAverage CurrentFrequency - Switching65kHz
Current - Startup10µAVoltage - Supply16 V ~ 20 V
Operating Temperature-40°C ~ 105°CMounting TypeSurface Mount
Package / Case20-SOIC (7.5mm Width)Lead Free Status / RoHS StatusLead free / RoHS Compliant
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Electrical Characteristics
V
=15V, T
=25°C, unless otherwise noted.
DD
A
Symbol
Parameter
PWM Stage
FBPWM Section
A
FB to Current Comparator Attenuation
v-PWM
Z
Input Impedance
FB
I
Maximum Source Current
FB
FB
OPEN-
PWM Open-Loop Protection Voltage
LOOP
t
PWM Open-Loop Protection Delay Time
OPEN-PWM
t
OPEN-PWM-
PWM Off to Turn On Delay Time
DLY
S
Green-Mode Modulation Slope
G
V
Frequency Reduction Threshold on FBPWM
FB-N
V
Voltage on FBPWM at f
FB-G
V
Voltage of FBPWM < V
OZ-NG
PWM-Current Sense Section
t
Propagation Delay to Output
PD-PWM
V
Peak Current Limit Threshold Voltage1
LIMIT
t
Leading-Edge Blanking Time
LEB-PWM
Slope Compensation ΔV
ΔV
ΔV
: Compensation Voltage Added to Current
SLOPE
S
Sense
PWM Oscillator Section
f
PWM Frequency
OSC
f
Minimum Frequency
OSC-MIN
f
Frequency Variation vs. V
DV
Frequency Variation vs. Temperature
f
DT
Deviation
PWM Output Driver Section
V
Output-Voltage Maximum (Clamp)
Z-PWM
V
Output-Voltage Low
OL-PWM
V
Output-Voltage High
OH-PWM
t
Rising Time
r-pwm
t
Falling Time
f-pwm
Maximum Duty Cycle
DCY
MAXPWM
© 2007 Fairchild Semiconductor Corporation
SG6905 • Rev. 1.1.2
Conditions
R
=24kΩ
I
PFC_ON > VOFF
PFC_ON > VOFF
= 20KHz
PFC_ON > VOFF
S
Gate Turn Off
PFC_ON < VOFF
OZ
V
=15V
DD
OPWM ≤ 9V
= DV
x (T
/T)
S
SLOPE
on
R
=24kΩ
I
R
=24kΩ;
I
FBPWM=V
PFC_ON > VOFF
Deviation
V
=11 to 20V
DD
DD
T
=-20 to 85°C
A
V
=20V
DD
V
=15V; I
DD
V
=13V; I
DD
V
=15V; C
DD
O/P=2V to 9V
V
=15V; C
DD
O/P=9V to 2V
10
Min.
Typ.
Max.
2.5
3.1
3.5
4
5
7
0.8
1.2
1.5
4.2
4.5
4.8
45
56
70
450
600
750
80
100
120
1.8
2.0
2.2
1.35
1.60
1.75
0.6
50
120
0.85
0.90
0.95
170
250
350
0.30
0.33
0.36
62
65
68
;
19.0
21.0
23.5
G
2
2
16
18
=100mA
1.5
O
=100mA
8
O
=5nF;
L
30
60
120
=5nF;
L
30
50
110
73
78
83
Continued on the following page…
www.fairchildsemi.com
Units
V/V
kΩ
mA
V
ms
ms
Hz/V
V
V
V
ns
V
ns
V
V
V
%
%
V
V
V
ns
ns
%