Data Sheet

© 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSQ-Series • Rev. 1.1.3 7
FSCQ-Series — Green Mode Fairchild Power Switch (FPS™)
Electrical Characteristics
T
A
= 25°C unless otherwise specified.
Symbol
Parameter
Condition
Min.
Typ.
Max.
Unit
SenseFET Part
BV
DSS
Drain-Source Breakdown Voltage
V
GS
= 0 V, I
D
= 250 μA
650
V
I
DSS
Zero Gate Voltage Drain Current
V
DS
= 650 V,V
GS
= 0 V
250
μA
R
DS(ON)
Drain-Source On-State Resistance
FSCQ0565RT
V
GS
= 10 V, I
D
= 1 A
1.76
2.20
Ω
FSCQ0765RT
V
GS
= 10 V, I
D
= 1 A
1.40
1.60
FSCQ0965RT
V
GS
= 10 V, I
D
= 1 A
1.00
1.20
FSCQ1265RT
V
GS
= 10 V, I
D
= 1 A
0.75
0.90
FSCQ1565RT
V
GS
= 10 V, I
D
= 1 A
0.53
0.70
C
ISS
Input Capacitance
FSCQ0565RT
V
GS
= 0 V, V
DS
= 25 V,
f = 1 MHz
1080
pF
FSCQ0765RT
1415
FSCQ0965RT
1750
FSCQ1265RT
2400
FSCQ1565RT
3050
C
OSS
Output Capacitance
FSCQ0565RT
V
GS
= 0 V, V
DS
= 25 V,
f = 1 MHz
90
pF
FSCQ0765RT
100
FSCQ0965RT
130
FSCQ1265RT
175
FSCQ1565RT
220
Control Section
f
OSC
Switching Frequency
V
FB
= 5 V, V
CC
= 18 V
18
20
22
kHz
Δf
OSC
Switching Frequency Variation
(7)
-25°C ≤ T
A
≤ 85°C
0
±5
±10
%
I
FB
Feedback Source Current
V
FB
= 0.8 V, V
CC
= 18 V
0.50
0.65
0.80
mA
D
MAX
Maximum Duty Cycle
V
FB
= 5 V, V
CC
= 18 V
92
95
98
%
D
MIN
Minimum Duty Cycle
V
FB
= 0 V, V
CC
= 18 V
0
%
V
START
UVLO Threshold Voltage
V
FB
= 1 V
14
15
16
V
V
STOP
8
9
10
t
SS
Soft-Start Time
(6)
18
20
22
ms
Burst Mode Section
V
BEN
Burst Mode Enable Feedback Voltage
0.25
0.40
0.55
V
I
BFB
Burst Mode Feedback Source Current
V
FB
= 0 V
60
100
140
μA
t
BS
Burst Mode Switching Time
V
FB
= 0.9 V,
Duty = 50%
1.2
1.4
1.6
ms
t
BH
Burst Mode Hold Time
V
FB
= 0.9 V → 0 V
1.2
1.4
1.6
ms
Protection Section
V
SD
Shutdown Feedback Voltage
V
CC
= 18 V
7.0
7.5
8.0
V
I
DELAY
Shutdown Delay Current
V
FB
= 5 V, V
CC
= 18 V
4
5
6
μA
V
OVP
Over-Voltage Protection
V
FB
= 3 V
11
12
13
V
V
OCL
Over-Current Latch Voltage
(6)
V
CC
= 18 V
0.9
1.0
1.1
V
TSD
Thermal Shutdown Temperature
(7)
140
°C
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