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SI9124 Datasheet(Fiches technique) 5 Page - Vishay Siliconix

Numéro de pièce SI9124
Description  500-kHz Push-Pull DC-DC Converter With Integrated Secondary Synchronous Rectification Control
Télécharger  16 Pages
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Fabricant  VISHAY [Vishay Siliconix]
Site Internet  http://www.vishay.com
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Si9124
Vishay Siliconix
New Product
Document Number: 72099
S-03638—Rev. B, 20-Mar-03
www.vishay.com
5
SPECIFICATIONSa
Limits
- 40 to 85
_C
Test Conditions Unless Specified
CS1 = CS2 = 0 V, fNOM = 500 kHz, VIN = 48 V
VINDET = 4.8 V; 10 V v VCC v 13.2 V, VCC2 = VCC
Parameter
Unit
Maxb
Typc
Minb
Test Conditions Unless Specified
CS1 = CS2 = 0 V, fNOM = 500 kHz, VIN = 48 V
VINDET = 4.8 V; 10 V v VCC v 13.2 V, VCC2 = VCC
Symbol
Output A Primary Driver
Output High Voltage
VOH
Sourcing 10 mA
VCC2 -
0.3
V
Output Low Voltage
VOL
Sinking 10 mA
PGND2
+ 0.3
V
VCC2 Current
ICC5
0.1
1.55
1.1
mA
Peak Output Source
ISOURCE
VCC2 = 12 V, PGND2 = 0 V
- 1.0
- 0.75
A
Peak Output Sink
ISINK
VCC2
12 V, PGND2
0 V
0.75
1.0
A
Rise Time
tr
TA = 25_C COUTA = 3 nF VCC = 12 V 20 80%
18
28
ns
Fall Time
tf
TA = 25_C, COUTA = 3 nF, VCC = 12 V, 20 - 80%
22
28
ns
Output B Primary Driver
Output High Voltage
VOH
Sourcing 10 mA
VCC -
0.3
V
Output Low Voltage
VOL
Sinking 10 mA
0.3
V
Peak Output Source
ISOURCE
VCC = 12 V PGND = 0 V
- 1.0
- 0.75
A
Peak Output Sink
ISINK
VCC = 12 V, PGND = 0 V
0.75
1.0
A
Rise Time
tr
TA = 25_C COUTB = 3 nF VCC = 12 V 20 80%
19
28
ns
Fall Time
tf
TA = 25_C, COUTB = 3 nF, VCC = 12 V, 20 - 80%
24
28
ns
Secondary_Synchronous Driver
Output High Voltage
VOH
Sourcing 10 mA
VCC -
0.4
V
Output Low Voltage
VOL
Sinking 10 mA
0.4
V
Leading Edge Delays
td1
TA = 25_C VCC = 12 V LX = 48 V See Figure 3
80
110
Leading Edge Delays
td3
TA = 25_C, VCC = 12 V, LX = 48 V, See Figure 3
80
110
ns
Trailing Edge Delays
td2
COUTA = COUTB = 3nF CSEC SYNC = 0 3 nF
80
110
ns
Trailing Edge Delays
td4
COUTA = COUTB = 3nF, CSEC_SYNC = 0.3 nF
80
110
Peak Output Source
ISOURCE
VCC = 12 V
- 100
mA
Peak Output Sink
ISINK
VCC = 12 V
100
mA
Rise Time
tr
TA = 25_C CSEC SYNC = 0 3 nF VCC = 12 V 20 80%
16
28
ns
Fall Time
tf
TA = 25_C, CSEC_SYNC = 0.3 nF, VCC = 12 V, 20 - 80%
17
28
ns
Voltage Mode
Error Amplifier
td1A
Input to A-side switch off
t200
ns
Error Amplifier
td1A
td2B
Input to B-side switch off
t200
ns
Current Mode
Current Amplifier
td3A
Input to A-side switch off
t200
ns
Current Amplifier
td3A
td4B
Input to B-side switch off
t200
ns
Notes
a.
Refer to PROCESS OPTION FLOWCHART for additional information.
b.
The algebraic convention whereby the most negative value is a minimum and the most positive a maximum ( - 40
_ to 85_C).
c.
Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing and are measured at VCC = 12 V unless otherwise noted.
d.
VUVLO tracks VREG1 by a diode drop.
e.
Measured on OUTA or OUTB outputs.
f.
Note total supply current drawn is ICC3 plus ICC5.




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