SI9122 Vishay Siliconix, SI9122 Datasheet - Page 4

• Manufacturer Part Number: SI9122
• Description: 500-kHz Half-Bridge DC-DC Converter With Integrated Secondary Synchronous Rectification Drivers
• Manufacturer: Vishay Siliconix

Si9122
Vishay Siliconix
www.vishay.com
4
SPECIFICATIONS
Current Sense Amplifier
Input amplifier Offset Voltage
CL_CONT Current
CL_CONT Current
Lower Current Limit Threshold
Upper Current Limit Threshold
Hysteresis
CL_CONT Clamp Level
PWM Operation
Duty Cycle
Pre-Regulator
Input Voltage
Input Leakage Current
Regulator Bias Current
Regulator Bias Current
Regulator Comp
Regulator_Comp
Pre-Regulator Drive Capacility
V
V
Threshold Voltage
Threshold Voltage
Undervoltage Lockout
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
CC
UVLO
INDET
INDET
INDET
INDET
INDET
y y
P
Pre-Regulator Turn Off
Hysteresis
Hysteresis
Shutdown FN
Hysteresis
− V
R
Input Threshold Voltages
Parameter
e
IN
Under Voltage
l t
LOAD
g
T
Off
a
C
CC
V
Symbol
V
L_CONT(min)
I
I
I
CL_CONT
CL_CONT
SS_COMP
SOURCE
UVLOHYS
I
V
V
V
V
V
V
V
D
I
I
)
START
D
D
I
+V
V
I
REG1
REG2
I
I
I
I
SINK
V
V
REG1
REG1
REG2
UVLO
UVLO
TLCL
THCL
LKG
I
CC1
CC2
CC3
CC4
MAX
SS
MIN
MIN
OS
SD
UV
IN
V
V
Unless Otherwise Specified
Unless Otherwise Specified
INDET
INDET
f
f
V
V
OSC
OSC
V
V
INDET
INDET
V
V
V
INDET
INDET
f
f
V
CC
NOM
NOM
CC
CC
V
I
V
IN
Shutdown, V
V
PD
= 500 kHz
= 500 kHz
= 7.2 V; 10 V v V
= 7.2 V; 10 V v V
IN
C
Test Conditions
Test Conditions
IN
CS2
= 12 V, C
Rising
Rising
= 72 V, V
u V
u V
SRH
Start-Up Condition
= 72 V, V
Normal Operation
V
u V
= I
= 72 V, V
= 500 kHz, V
= 500 kHz, V
= 0 V
dV
dV
T
INDET
V
V
I
T
See Figure 6
I
V
PU
− V
PU
I
PU
V
V
J
I
INDET
INDET
PD
J
CS
CS
CC
REF
REF
IN
= C
dV
Decreasing
REF
CC
CC
Increasing
V
V
t 500 mA
CS1
− I
= 500 mA
= 10 mA
u 2 mA
INDET
INDET
CS
= 100 mV
= 170 mV
t V
SRL
DH
t V
= 12 V
= 12 V
, f
INDET
CL_CONT
INDET
CC
INDET
Rising
Rising
NOM
u 150 mV
= 0
= C
REG
= 0.3 nF
u V
IN
IN
REF
u V
DL
= 500 kHz
t V
CC
CC
= 0 V
= 72 V
= 72 V
V
REG
= 3 nF
T
T
= 0
V
EP
v 13.2 V
v 13.2 V
REF
A
A
SD
EP
= 1.75 V
= 25_C
= 25_C
= 0 V
Min
7.15
7.35
3.13
−29
350
0.6
7.4
8.5
8.1
90
50
20
12
50
4
5
b
−40 to 85_C
Limits
Typ
t15
8.05
120
100
150
−50
−19
550
200
160
130
"5
u2
9.1
9.1
9.2
8.8
8.8
0.5
3.3
0.3
92
86
82
20
10
21
0
3
8
8
c
S-41944—Rev. F, 18-Oct-04
Document Number: 71815
Max
10.4
8.85
3.46
200
110
720
350
1.5
9.7
9.8
9.3
95
72
10
14
−9
28
12
14
b
Unit
mV
mA
mV
mA
mA
mV
mV
mA
mA
_C
_C
mA
mA
mA
mA
mA
mA
mA
mA
%
V
V
V
V
V
V
V
V