參數(shù)資料
型號(hào)： SI9124
廠商： Vishay Intertechnology,Inc.
元件分類： DC/DC變換器
英文描述： 500-kHz Push-Pull DC-DC Converter With Integrated Secondary Synchronous Rectification Control
中文描述： 500千赫推挽式直流與集成的次級(jí)同步整流控制DC轉(zhuǎn)換器
文件頁(yè)數(shù)： 3/16頁(yè)
文件大?。?/td> 175K
代理商： SI9124
Si9124
Vishay Siliconix
New Product
Document Number: 72099
S-03638—Rev. B, 20-Mar-03
www.vishay.com
3
ABSOLUTE MAXIMUM RATINGS (ALL VOLTAGES REFERENCED TO GND = 0 V)
V
IN
(Continuous)
V
IN
(100 ms)
V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V
CC2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V
REF
, R
OSC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Logic Inputs
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
75 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
100 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14.5 V
14.5 V
-0.3 V to V
CC
+ 0.3 V
-0.3 V to V
CC
+ 0.3 V
-0.3 V to V
CC
+ 0.3 V
Analog Inputs
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SEC_SYNC Drive Current
35 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HV Pre-Regulator Input Current (continuous)
Storage Temperature
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Junction Temperature
Power Dissipation
a
TSSOP-16 (T
A
= 25 C)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Impedance (
JA
)
TSSOP-16
b
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Notes
a.
Device mounted on JEDEC compliant 1S2P (4 layer) test board.
b.
Derate -10 mW/ C above 25 C.
5 mA
. . . . . . . . . . . . . . . . . . . . .
-65 to 150 C
125 C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.25 W
100 C/W
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation
of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
RECOMMENDED OPERATING RANGE (ALL VOLTAGES REFERENCED TO GND = 0 V)
V
IN
C
VIN1 CVIN2
V
CC
Operating
CV
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
f
OSC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
R
OSC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
R
EXT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
36 to 72 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
100 F/ESR
100 m
and 0.1 F
10 to 13.2 V
4.7 F
200 to 600 kHz
24 to 72 k
1.4 k
C
SS
C
REF
C
BOOST
C
LOAD
Analog Inputs
Digital Inputs
Reference Voltage Output Current
22 nF
1.0 F
0.1 F
150 F
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
0 to V
CC
-0.3 V
0 to V
CC
0 to 2.5 mA
SPECIFICATIONS
a
Test Conditions Unless Specified
CS1 = CS2 = 0 V, f
NOM
= 500 kHz, V
IN
= 48 V
V
INDET
= 4.8 V; 10 V
V
CC
Limits
-40 to 85 C
Typ
c
Parameter
Symbol
13.2 V, V
CC2
= V
CC
Min
b
Max
b
Unit
Reference (3.3 V)
Output Voltage
V
REF
I
SREF
dVr/dlr
V
CC
= 12 V, 25 C Load = 0 mA
V
REF
= 0 V
I
REF
= 0 to -2.5 mA
@ 100Hz
3.2
3.3
3.4
V
Short Circuit Current
-50
mA
Load Regulation
-30
-75
mV
Power Supply Rejection
PSRR
60
dB
Oscillator
Accuracy (1% R
OSC
)
Max Frequency
R
OSC
= 30 k , f
NOM
= 500 kHz
R
OSC
= 24 k
-20
20
%
F
MAX
600
kHz
Error Amplifier
Input Bias Current
I
BIAS
A
V
BW
V
EP
= 0 V
-40
-15
A
Gain
-2.2
V/V
Bandwidth
5
MHz
Power Supply Rejection
PSRR
@ 100Hz
60
dB
Slew Rate
SR
0.5
V/ s
Current Sense Amplifier
Input Voltage CM Range
V
CM
A
VOL
BW
V
CS1
- GND, V
CS2
- GND
150
mV
Input Amplifier Gain
17.5
dB
Input Amplifier Bandwidth
5
MHz
Input Amplifier Offset Voltage
V
CC
Hiccup Threshold
Hysteresis
V
OS
V
THCUP
5
Increase CS2 Until SS Hiccups
Decrease CS2 Until SS Clamps
150
-50
mV
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