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SI9112DY-T1-E3

P1-P3P4-P6P7-P9
Si9112
Vishay Siliconix
Document Number: 70005
S-42036—Rev. H, 15-Nov-04
www.vishay.com
1
High-Voltage Switchmode Controller
FEATURES
9- to 80-V Input Range
Current-Mode Control
High-Speed, Source-Sink Output Drive
High Efficiency Operation (> 80%)
Internal Start-Up Circuit
Internal Oscillator (1 MHz)
SHUTDOWN and RESET
DESCRIPTION
The Si9112 is a BiC/DMOS integrated circuit designed for use
in high-efficiency switchmode power converters. A
high-voltage DMOS input allows this controller to work over a
wide range of input voltages (9- to 80-VDC). Current-mode
PWM control circuitry is implemented in CMOS to reduce
internal power consumption to less than 10 mW.
A CMOS output driver provides high-speed switching of
MOSPOWER devices large enough to supply 50 W of output
power. When combined with an output MOSFET and
transformer, the Si9112 can be used to implement
single-ended power converter topologies (i.e., flyback,
forward, and cuk).
The Si9112 is available in both standard and lead (Pb)-free
14-pin plastic DIP and SOIC packages which are specified to
operate over the industrial temperature range of −40
C to
85
C.
FUNCTIONAL BLOCK DIAGRAM
+
−
−
+
+
−
+
−
+
−
FB COMP DISCHARGE
OSC
14 13 9 8 7
2 V
Ref
Gen
R
S
Q
R
S
Q
SENSE
3
11
12
Current-Mode
Comparator
C/L
1.2 V
Undervoltage Comparator
RESET
8.1 V
8.7 V
BIAS
Current
Sources
To
Internal
Circuits
10
1
6
2
Comparator
Error
Amplifier
V
REF
V
CC
+V
IN
V
CC
SHUTDOWN
4 V (2%)
OSC
OUT
OSC
IN
Pre-Regulator/Start-Up
5
4
−V
IN
OUTPUT
To
V
CC
Clock (
1
/
2
f
OSC
)
Applications information, see AN703.
End of Life. Last Available Purchase Date is 31-Dec-2014
Si9112
Vishay Siliconix
www.vishay.com
2
Document Number: 70005
S-42036—Rev. H, 15-Nov-04
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to −V
IN
(V
CC
< +V
IN
+ 0.3 V)
V
CC
15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
+V
IN
80 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Logic Inputs
(RESET, SHUTDOWN
, OSC IN) −0.3 V to V
CC
+ 0.3 V. . . . . . . . . . . . . . . . .
Linear Inputs (FEEDBACK, SENSE) −0.3 V to V
CC
+ 0.3 V. . . . . . . . . . . . . .
HV Pre-Regulator Input Current (continuous) 25 mA. . . . . . . . . . . . . . . . . . . .
(Power Dissipation Limited)
Storage Temperature −65 to 150_C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature −40 to 85_C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Junction Temperature (T
J
) 150_C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation (Package)a
14-Pin Plastic DIP (J Suffix)
b
750 mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14-Pin SOIC (Y Suffix)
c
900 mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Impedance (
JA
)
14-Pin Plastic DIP 167_C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14-Pin SOIC 140_C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Notes
a. Device mounted with all leads soldered or welded to PC board.
b. Derate 6 mW/_C above 25_C.
c. Derate 7.2 mW/_C above 25_C.
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
Voltages Referenced to −V
IN
V
CC
9 V to 13.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
+V
IN
9 V to 80 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
f
OSC
40 kHz to 1 MHz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
R
OSC
25 k to 1 M. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Linear Inputs 0 to V
CC
− 3 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Digital Inputs 0 to V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPECIFICATIONS
a
Test Conditions
Unless Otherwise Specified
DI
SC
HAR
G
E = −V
IN
=
0
V
Limits
D Suffix −40 to 85_C
Parameter Symbol
DISCHARGE
=
−
V
IN
=
0 V
V
CC
= 9 V, +V
IN
= 12 V
R
BIAS
= 270 k , R
OSC
= 330 k
Temp
b
Min
d
Typ
c
Max
e
Unit
Reference
Output Voltage V
R
OSC IN = − V
IN
(OSC Disabled)
R
L
= 10 M
Room
Full
e
3.88
3.82
4.0 4.12
4.14
V
Output Impedance
e
Z
OUT
Room 15 30 45 k
Short Circuit Current I
SREF
V
REF
= −V
IN
Room 70 100 130 A
Temperature Stability
e
T
REF
Full 0.5 1.0 mV/_C
Oscillator
Maximum Frequency
e
f
MAX
R
OSC
= 0 Room 1 3 MHz
Initial Accuracy
f
OSC
R
OSC
= 330 k, See Note f Room 80 100 120
kHz
Initial Accuracy f
OSC
R
OSC
= 150 k, See Note f Room 160 200 240
kHz
Voltage Stability f/f f/f = f(13.5 V) − f(9.5 V) / f(9.5 V) Room 9 15 %
Temperature Coefficient
e
T
OSC
Full 200 500 ppm/_C
Error Amplifier
Feedback Input Voltage V
FB
FB Tied to COMP
OSC IN = − V
IN
(OSC Disabled)
Room 3.92 4.00 4.08 V
Input Offset Voltage V
OS
OSC IN = − V
IN
(OSC Disabled) Room "15 "40 mV
Input BIAS Current I
FB
OSC IN = − V
IN
, V
FB
= 4 V Room 25 500 nA
Open Loop Voltage Gain
e
A
VOL
OSC IN = − V
IN
Room 60 80 dB
Unity Gain Bandwidth
e
BW OSC IN = − V
IN
(OSC Disabled) Room 1 1.5 MHz
Dynamic Output Impedance
e
Z
OUT
Error Amp Configured for 60 dB gain Room 1000 2000
Output Current
I
OUT
Source V
FB
= 3.4 V Room −2.0 −1.4
mA
Output Current I
OUT
Sink V
FB
= 4.5 V Room 0.12 0.15
mA
Power Supply Rejection
e
PSRR 9 V v V
CC
v 13.5 V Room 50 70 dB
Si9112
Vishay Siliconix
Document Number: 70005
S-42036—Rev. H, 15-Nov-04
www.vishay.com
3
SPECIFICATIONS
a
Limits
D Suffix −40 to 85_C
Test Conditions
Unless Otherwise Specified
DISCHARGE = −V
IN
= 0 V
V
CC
= 9 V, +V
IN
= 12 V
R
BIAS
= 270 k , R
OSC
= 330 k
Parameter UnitMax
e
Typ
c
Min
d
Temp
b
Test Conditions
Unless Otherwise Specified
DISCHARGE = −V
IN
= 0 V
V
CC
= 9 V, +V
IN
= 12 V
R
BIAS
= 270 k , R
OSC
= 330 k
Symbol
Current Limit
Threshold Voltage V
SOURCE
V
FB
= 0 V Room 1.1 1.3 1.5 V
Delay to Output
e
t
d
V
SENSE
= 1.5 V, See Figure 1 Room 100 150 ns
Pre-Regulator/Start-Up
Input Voltage +V
IN
I
IN
= 10 A Room 80 V
Input Leakage Current +I
IN
V
CC
w 9.4 V Room 10 A
Pre-Regulator Start-Up Current I
START
+V
IN
= 48 V Room 12 20 mA
Pre-Regulator Dropout Voltage V
CC
+V
IN
= 10 V, R
LOAD
= 4 k at Pin 6 Room
V
UVLO
+0.1
V
CC
Pre-Regulator Turn-Off
Threshold Voltage
V
REG
I
PRE-REGULATOR
= 10 A Room 8.0 8.7 9.4
V
Undervoltage Lockout V
UVLO
See Detailed Description Room 7.2 8.1 8.9
V
REG
−V
UVLO
V
DELTA
Room 0.3 0.6
Supply
Supply Current I
CC
C
L
v 75 pF (Pin 4) Room 0.6 1.0 mA
Bias Current I
BIAS
Room 15 A
Logic
SHUTDOWN Delay
e
t
SD
C
L
= 500 pF
V
SENSE
= −V
IN
, See Figure 2
Room 50 100
SHUTDOWN Pulse Width
e
t
SW
Room 50
ns
RESET Pulse Width
e
t
RW
See Fi
g
ure 3
Room 50
ns
Latching Pulse Width
SHUTDOWN
and RESET Low
e
t
LW
See Figure 3
Room 25
Input Low Voltage V
IL
Room 2.0 V
Input High Voltage V
IH
Room 7.0
Input Current Input Voltage High I
IH
V
LOGIC
= V
CC
Room 1 5 A
Input Current Input Voltage Low I
IL
V
IN
= 0 V Room −35 25
Output
Output High Voltage V
OH
I
OUT
= −10 mA
Room
Full
8.7
8.5
V
Output Low Voltage V
OL
I
OUT
= 10 mA
Room
Full
0.3
0.5
V
Output Resistance
e
R
OUT
I
OUT
= 10 mA, Source or Sink
Room
Full
20
25
30
50
Rise Time
e
t
r
C
L
= 500 pF
Room 40 75
ns
Fall Time
e
t
f
C
L
=
5
00
p
F
Room 40 75
ns
Notes
a. Refer to PROCESS OPTION FLOWCHART for additional information.
b. Room = 25_C, Full = as determined by the operating temperature suffix.
c. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
d. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum.
e. Guaranteed by design, not subject to production test.
f. C
STRAY
Pin 8 = v 5 pF.
P1-P3P4-P6P7-P9

SI9112DY-T1-E3

Mfr. #:
Buy SI9112DY-T1-E3
Manufacturer:
Vishay / Siliconix
Description:
Switching Controllers Hi-Eff/Hi-Voltage Switchmode
Lifecycle:
New from this manufacturer.
Delivery:
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