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參數(shù)資料
| 型號： | 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同步整流控制DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 4/16頁 |
| 文件大?。?/td> | 175K |
| 代理商： | SI9124 |
Si9124
Vishay Siliconix
New Product
www.vishay.com
4
Document Number: 72099
S-03638—Rev. B, 20-Mar-03
SPECIFICATIONS
a
Limits
-40 to 85 C
Typ
c
Test Conditions Unless Specified
V
INDET
= 4.8 V; 10 V
V
CC
13.2 V, V
CC2
= V
CC
Parameter
Unit
Max
b
Min
b
CS1 = CS2 = 0 V, f
NOM
= 500 kHz, V
IN
= 48 V
Symbol
PWM Operation
Duty Cycle
e
D
MAX
D
MIN
f
OSC
= 500 kHz
V
EP
= 0 V
V
EP
= 1.85 V
90
92
95
%
15
Pre-Regulator
Input Voltage (Continuous)
V
IN
I
LKG
I
REG1
I
REG2
I
START
I
IN
= 10 A
72
V
Input Leakage Current
V
IN
= 72 V, V
CC
V
IN
= 72 V, V
INDET
V
IN
= 72 V, V
INDET
V
CC
V
REG
V
SD
V
REF
10
200
7.5
A
Regulator Bias Current
86
4.5
mA
Pre-Regulator Drive Capacility
V
REG
20
7.4
8.5
V
Pre-R
Threshold Voltage
P
l t T
Off
V
REG1
V
INDET
V
REF
9.1
9.1
9.2
8.6
8.6
0.5
10.4
9.7
T
A
= 25 C
V
REG2
V
INDET
= 0 V
V
Undervoltage Lockout
d
V
UVLO
V
CC
Rising
7.15
8.1
9.8
9.3
T
A
= 25 C
V
UVLO
Hysteresis
Soft-Start
V
UVLOHYS
Soft-Start Current Output
I
SS1
I
SS2
0
V
SS
V
SS
2 V
be
4.8 V
12
20
28
A
2 V
be
Normal Operation
60
100
200
Soft-Start Completion Voltage
V
SS_COMP
7.35
8.1
8.85
V
Shutdown
V
INDET
Shutdown FN
V
INDET
Hysteresis
V
INDET
Input Threshold Voltages
V
INDET
- V
IN
Under Voltage
V
INDET
Hysteresis
Over Temperature Protection
V
SD
V
INDET
Rising
V
INDET
350
550
720
mV
200
V
UV
V
INDET
Rising
V
INDET
3.13
3.3
3.46
V
0.3
Activating Temperature
T
J
Increasing
T
J
Decreasing
160
C
De-Activating Temperature
130
Converter Supply Current (V
CC
)
Shutdown
Switching Disabled
Switching w/o Load
f
Switching with C
LOAD
I
CC1
I
CC2
I
CC3
I
CC4
Shutdown, V
INDET
= 0 V
V
INDET
V
INDET
V
REF
, f
NOM
= 500 kHz
V
CC
= 12 V, OUT
A
=
OUT
B
= 3 nF, C
SEC_SYNC
= 0.3 nF
CS2 - CS1 = 200 mV, C
= C
OUTB
= 3 nF
C
SEC_SYNC
= 0.3 nF
50
1.8
3.0
140
2.8
4.4
15.2
350
3.8
6.8
A
V
REF
mA
V
CC
Hiccup Current
I
HCUP
4.3
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