SI9122A_08 VISHAY [Vishay Siliconix], SI9122A_08 Datasheet - Page 5

• Manufacturer Part Number: SI9122A_08
• Description: 500-kHz Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification Drivers
• Manufacturer: VISHAY [Vishay Siliconix]

Document Number: 73492
S-80038-Rev. D, 14-Jan-08
SPECIFICATIONS
Parameter
Pre-Regulator
V
Threshold Voltage
Undervoltage Lockout
V
Soft-Start
Soft-Start Current Output
Soft-Start Completion Voltage
Shutdown
V
V
V
V
V
Over Temperature Protection
Activating Temperature
De-Activating Temperature
Converter Supply Current (V
Shutdown
Switching Disabled
Switching w/o Load
Switching with C
Output MOSFET DH Driver (High-Side)
Output High Voltage
Output Low Voltage
Boost Current
L
Peak Output Source
Peak Output Sink
Rise Time
Fall Time
Output MOSFET DL Driver (Low-Side)
Output High Voltage
Output Low Voltage
Peak Output Source
Peak Output Sink
Rise Time
Fall Time
X
CC
UVLO
INDET
SD
INDET
INDET
UV
Current
Hysteresis
Hysteresis
Pre-Regulator Turn Off
Hysteresis
Shutdown
Input Threshold Voltages
- V
IN
Under Voltage
LOAD
g
a
CC
)
V
V
I
I
Symbol
SS_COMP
UVLOHYS
SOURCE
SOURCE
V
V
V
I
I
I
I
I
I
V
I
V
V
V
V
V
SINK
SINK
REG1
REG2
UVLO
I
CC1
CC2
CC3
CC4
BST
I
SS
LX
OH
t
t
OH
t
t
SD
UV
OL
OL
r
f
r
f
V
INDET
V
V
V
Unless Otherwise Specified
V
V
INDET
V
INDET
f
CC
LX
LX
NOM
CC
Shutdown, V
= 7.5 V; 10.5 V ≤ V
C
= 75 V, V
= 75 V, V
= 12 V, C
Rising
SRH
Start-Up Condition
Normal Operation
Test Conditions
> V
= 500 kHz, V
Sourcing 10 mA
Sourcing 10 mA
> V
V
Sinking 10 mA
Sinking 10 mA
T
V
V
T
V
V
V
J
INDET
C
C
INDET
INDET
J
= C
CC
CC
REF
INDET
REF,
Decreasing
DH
DL
Increasing
V
V
INDET
INDET
= 10.5 V
= 10.5 V
BST
BST
SRL
DH
= 3 nF
= 3 nF
f
< V
NOM
Rising
Rising
INDET
= 0 V
= C
= 0.3 nF
= V
= V
REF
IN
= 500 kHz
DL
LX
LX
= 0 V
= 75 V
CC
= 3 nF
+ V
+ V
≤ 13.2 V
T
T
CC
CC
A
A
= 25 °C
= 25 °C
V
V
BST
CC
Min.
7.15
7.35
3.13
0.23
- 1.3
0.75
0.75
350
7.4
8.5
8.1
1.3
12
50
4
5
- 0.3
- 0.3
b
- 40 to 85 °C
Limits
Vishay Siliconix
Typ.
- 0.7
- 1.0
- 1.0
8.05
550
200
160
130
9.1
9.1
9.2
8.8
8.8
0.5
3.3
0.3
1.9
1.0
1.0
20
10
21
35
35
35
35
8
c
V
Si9122A
Max.
LX
- 0.75
- 0.75
www.vishay.com
- 0.4
10.4
8.85
3.46
0.35
720
350
9.7
9.8
9.3
2.7
0.3
28
12
15
+ 0.3
b
Unit
mV
mA
mA
µA
µA
°C
ns
ns
V
V
V
V
A
V
A
5