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參數(shù)資料
| 型號(hào)： | SG6902SZ |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Green-Mode PFC / Flyback-PWM Controller |
| 中文描述： | POWER FACTOR CONTROLLER, 68 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封裝： | 0.300 INCH, ROHS COMPLIANT, MS-013AC, SOP-20 |
| 文件頁(yè)數(shù)： | 8/22頁(yè) |
| 文件大小： | 863K |
| 代理商： | SG6902SZ |
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Product Specification
Green-Mode PFC / Flyback-PWM Controller
PWM STAGE
SG6902
System General Corp.
Version 1.3.1 (IAO33.0022.B3)
- 8 -
www.sg.com.tw www.fairchildsemi.com
September, 2007
FBPWM
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
A
v-PWM
Z
FB
I
FB
FB
OPEN-LOOP
T
OPEN-PWM
V
PFC-OFF1
V
PFC-OFF2
T
PFC-OFF
FB to Current Comparator Attenuation
Input Impedance
Maximum Source Current
PWM Open-Loop Protection Threshold
PWM Open-Loop Protection Delay Time
PFC Off Voltage at FBPWM
PFC Off Voltage at FBPWM
PFC Off Delay Time
R
I
=24k
RANGE=Ground
RANGE=Open
R
I
=24k
2.5
4
0.8
4.2
45
500
3.1
5
1.2
4.5
56
V
G
+0.2V
V
G
+0.2V
650
V
G
+0.35
V
V
G
+0.35
V
V
G
+0.85
V
V
G
+0.5V
3.5
7
1.5
4.8
70
V/V
K
mA
V
ms
V
V
ms
*
800
V
PFC-ON 1.6
PFC On Voltage at FBPWM
RANGE=Ground V
RMS
=1.6V
V
V
PFC-ON 2.85
PFC On Voltage at FBPWM
RANGE=Ground V
RMS
=2.85V
V
V
PFC-ON 0.8
PFC On Voltage at FBPWM
RANGE=Open V
RMS
=0.8V
V
V
PFC-ON 1.95
PFC On Voltage at FBPWM
Frequency Reduction Threshold on
FBPWM
Green-Mode Modulation Slope
Voltage on FBPWM at F
S
=20KHz
RANGE=Open V
RMS
=1.95V
V
V
N
RANGE=Ground
1.9
2.1
2.3
V
S
G
V
G
*
Not tested in production.
*1
60
1.35
75
1.60
90
1.75
Hz/V
V
PWM-Current Sense
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
T
PD-PWM
V
LIMIT-1
V
LIMIT-2
T
BNK-PWM
Propagation Delay to Output
Peak Current Limit Threshold Voltage1
Peak Current Limit Threshold Voltage2
Leading-Edge Blanking Time
RANGE=Open
RANGE=Ground
△
V
S
=
△
V
SLOPE
x (T
on
/T)
△
V
S
: Compensation Voltage
Added to Current Sense
60
0.65
0.60
270
0.70
0.65
350
120
0.75
0.70
450
ns
V
V
ns
△
V
SLOPE
Slope Compensation
0.45
0.50
0.55
V
PWM Output Driver
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
Z-PWM
V
OL-PWM
V
OH-PWM
Output Voltage Maximum (Clamp)
Output Voltage Low
Output Voltage High
V
DD=
20V
V
DD=
15V; I
O
=100mA
V
DD=
13V; I
O
=100mA
V
DD=
15V; C
L=
5nF; OPWM=2V to
9V
V
DD=
15V; C
L=
5nF; OPWM=9V to
2V
8
16
18
1.5
V
V
V
T
R-PWM
Rising Time
30
60
120
ns
T
F-PWM
Falling Time
30
50
110
ns
DC
MAX-PWM
Maximum Duty Cycle
73
78
83
%
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