SG6905SZ Fairchild Semiconductor, SG6905SZ Datasheet - Page 10

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SG6905SZ

Manufacturer Part Number
SG6905SZ
Description
IC PWM CTLR PFC/FLYBACK 20-SOP
Manufacturer
Fairchild Semiconductor
Datasheet

Specifications of SG6905SZ

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

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