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FA551X Datasheet

  • FA551X

  • CMOS IC For Switching Power Supply Control

  • 22頁

  • ETC

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FA551X series
FA5510P (N), FA5511P (N)
FA5514P (N), FA5515P (N)
鈻?/div>
Description
The FA551X series are the PWM type switching power supply
control ICs that can directly drive power MOSFET. These ICs
use a CMOS device with high dielectric strength (30V) to
implement low power consumption. These ICs contain many
function in a small 8-pin package. With these ICs, a high-
performance and compact power supply can be created
because not many external discrete components are needed.
CMOS IC
For Switching Power Supply Control
FA551X
鈻?/div>
Dimensions, mm
SOP-8
8
5
1
4.9
4
+0.1
鈥?.05
6.0
鹵0.2
3.9
鈻?/div>
Features
鈥?Low current consumption by CMOS process with high
dielectric strength (30V)
鈥?Standby current of 2碌A(chǔ) or less (at Vcc=14V), and operating
current of 1.5mA (typ)
鈥?Overvoltage protection function detecting the Vcc voltage
鈥?A drive circuit for connecting a power MOSFET directly
鈥?Output peak current: 鹵1.5A
鈥?Pulse-by-pulse overcurrent limiting function
鈥?Overload protection function (latch or non-latch mode selectable)
鈥?Output ON-OFF function by external signal
鈥?Latch-mode overvoltage shutdown function
鈥?Undervoltage lockout function (16.5V ON / 9V OFF)
鈥?Reference voltage output (5V)
鈥?8-pin package (DIP/SOP)
0.4
鹵0.1
1.27
DIP-8
8
5
1
9.3
4
1.5
鹵0.3
6.4
3.0min 4.5max
3.3
0~8
擄
鈻?/div>
Block diagram
FA5510P (N), FA5511P (N)
CS(8)
REF
(7)
5V VCC
ENB
5V REF
8.5V/7.9V
0.8V
3.5V
ENB
4V
PWM
Dmax
FA5510: 46%
FA5511: 70%
OSC
RT CT
OUT
PUT
0.8V/0.68V 5.2碌A(chǔ)
0.95mA
15.5V
15.5V
UVLO
0.05
0.25
鈥?/div>
7.62
0~15
藲
0~1
5藲
VCC(6)
2.54
0.46
鹵0.1
16.5V/9V
FB
(2)
OUT
(5)
Pin Pin
Function
No. symbol
1
RT
FB
IS
GND
OUT
VCC
REF
CS
Oscillator timing
resistor
Feedback
Overcurrent
detection
Ground
Output
Power supply
Reference voltage
Soft-start and
ON/OFF control
Description
Setting oscillation frequency
Input of PWM comparator
Input of the overcurrent
limiting function
Ground
Output for driving a power
MOSFET
Power supply
Reference voltage output (5V)
Soft-start, ON/OFF function and
latch-mode shutdown operations
R
+0.24V
GND
(4)
2
3
4
5
6
7
8
QB
S Q
FF
5V Controlled block
RT(1)
IS+(3)
FA5514P (N), FA5515P (N)
CS(8)
REF
(7)
5V VCC
ENB
5V REF
8.5V/7.9V
0.8V
3.5V
ENB
4V
PWM
Dmax
FA5514: 46%
FA5515: 70%
OSC
RT CT
OUT
PUT
0.8V/0.68V 5.2碌A(chǔ)
0.95mA
15.5V
15.5V
UVLO
VCC(6)
Type
FA5510P
OUT
(5)
Max. duty
cycle (typ.)
46%
70%
46%
70%
Polarity of overcurrent Package
detection
+
+
鈥?/div>
鈥?/div>
DIP-8
SOP-8
DIP-8
SOP-8
DIP-8
SOP-8
DIP-8
SOP-8
16.5V/9V
FA5510N
FA5511P
FA5511N
FB
(2)
R
-0.17V
GND
(4)
FA5514P
FA5514N
FA5515P
FA5515N
QB
S Q
FF
5V Controlled block
RT(1)
IS-(3)
1.8max
+0.1
0.20
1

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  • 英文版
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  • 英文版
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  • 英文版
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  • 英文版
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