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SI9120DY-T1-E3

P1-P3P4-P6P7-P9P10-P10
Si9120
Vishay Siliconix
Document Number: 70006
S-42042—Rev. H, 15-Nov-04
www.vishay.com
1
Universal Input Switchmode Controller
FEATURES
D 10- to 450-V Input Range
D Current-Mode Control
D 125-mA Output Drive
D Internal Start-Up Circuit
D Internal Oscillator (1 MHz)
D SHUTDOWN and RESET
DESCRIPTION
The Si9120 is a BiC/DMOS integrated circuit designed for use
in low-power, high-efficiency off-line power supplies.
High-voltage DMOS inputs allow the controller to work over a
wide range of input voltages (10- to 450-VDC). Current-mode
PWM control circuitry is implemented in CMOS to reduce
quiescent current to less than 1.5 mA.
A CMOS output driver provides high-speed switching for
MOSFET devices with gate charge, Q
g
, up to 25 nC, enough
to supply 30 W of output power at 100 kHz. These devices,
when combined with an output MOSFET and transformer, can
be used to implement single-ended power converter
topologies (i.e., flyback and forward).
The Si9120 is available in both standard and lead (Pb)-free
16-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
15 14 10 9 8
2 V
Ref
Gen
R
S
Q
R
S
Q
SENSE
4
12
13
Current-Mode
Comparator
C/L
1.2 V
Undervoltage Comparator
RESET
8.1 V
8.6 V
BIAS
Current
Sources
To
Internal
Circuits
11
16
7
1
Comparator
Error
Amplifier
V
REF
V
CC
+V
IN
V
CC
SHUTDOWN
4 V (1%)
Clock (
1
/
2
f
OSC
)
OSC
OUT
OSC
IN
Pre-Regulator/Start-Up
6
5
−V
IN
OUTPUT
To
V
CC
Applications information, see AN707 and AN708.
Si9120
Vishay Siliconix
www.vishay.com
2
Document Number: 70006
S-42042—Rev. H, 15-Nov-04
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to −V
IN
(Note: V
CC
< +V
IN
+ 0.3 V)
V
CC
15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
+V
IN
450 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Logic Inputs (RESET
SHUTDOWN
, OSC IN, OSC OUT) −0.3 V to V
CC
+ 0.3 V. . . . . . . . . . . . . . .
Linear Input
(FEEDBACK, SENSE, BIAS, V
REF
) −0.3 V to 7 V. . . . . . . . . . . . . . . . . . . . . .
HV Pre-Regulator Input Current (continuous) 5 mA
a
. . . . . . . . . . . . . . . . . . . .
Continuous Output Current (Source or Sink) 125 mA. . . . . . . . . . . . . . . . . . .
Storage Temperature −65 to 150_C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature −40 to 85_C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Junction Temperature (T
J
) 150_C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation (Package)
b
16-Pin Plastic DIP (J Suffix)
c
750 mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16-Pin SOIC (Y Suffix)
d
900 mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Impedance (Q
JA
)
16-Pin Plastic DIP 167_C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16-Pin SOIC 140_C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Notes
a. Continuous current may be limited by the applications maximum input
voltage and the package power dissipation.
b. Device mounted with all leads soldered or welded to PC board.
c. Derate 6 mW/_C above 25_C.
d. 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
9.5 V to 13.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
+V
IN
10 V to 450 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
f
OSC
40 kHz to 1 MHz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
R
OSC
25 kW to 1 MW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Linear Inputs 0 to V
CC
− 3 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Digital Inputs 0 to V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPECIFICATIONS
a
Specific Test Conditions
DISCHARGE = −V
IN
= 0 V,
LIMITS
D Suffix −40 to 85_C
Parameter Symbol
DISCHARGE = −V
IN
= 0 V
,
V
CC
= 10 V +V
IN
= 300 V
R
BIAS
= 390 kW, R
OSC
= 330 kW
TEMP
B
MIN
C
TYP
D
MAX
C
Unit
Reference
Output Voltage V
R
OSC IN = − V
IN
(OSC Disabled)
R
L
= 10 MW
Room
Full
3.88
3.82
4.0 4.12
4.14
V
Output Impedance
e
Z
OUT
Room 15 30 45 kW
Short Circuit Current I
SREF
V
REF
= −V
IN
Room 70 100 130 mA
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
C
STRAY
Pin 9 5 pF
R
OSC
= 330 kW
Room 80 100 120
kHz
Initial Accuracy f
OSC
C
STRAY
Pin 9 5 pF
R
OSC
= 150 kW
Room 160 200 240
kHz
Voltage Stability Df/f Df/f = f(13.5 V) − f(9.5 V) / f(9.5 V) Room 10 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 4.08 V
Input BIAS Current I
FB
OSC IN = − V
IN
, V
FB
= 4 V Room 25 500 nA
Input OFFSET Voltage V
OS
OSC IN = − V
IN
Room 15 40 mV
Open Loop Voltage Gain
e
A
VOL
OSC IN = − V
IN
Room 60 80 dB
Unity Gain Bandwidth
e
BW OSC IN = − V
IN
Room 1.0 1.5 MHz
Si9120
Vishay Siliconix
Document Number: 70006
S-42042—Rev. H, 15-Nov-04
www.vishay.com
3
SPECIFICATIONS
a
Specific Test Conditions
DISCHARGE = −V
IN
= 0 V,
LIMITS
D Suffix −40 to 85_C
Parameter Symbol
DISCHARGE = −V
IN
= 0 V
,
V
CC
= 10 V +V
IN
= 300 V
R
BIAS
= 390 kW, R
OSC
= 330 kW
TEMP
B
MIN
C
TYP
D
MAX
C
Unit
Error Amplifier (Cont’d)
Dynamic Output Impedance
e
Z
OUT
Error Amp configured for 60 dB gain Room 1000 2000 W
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 PSRR 9.5 V V
CC
13.5 V Room 50 70 dB
Current Limit
Threshold Voltage V
SOURCE
V
FB
= 0 V Room 1.0 1.2 1.4 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 mA Room 450 V
Input Leakage Current +I
IN
V
CC
9.4 V Room 10 mA
V
CC
Pre-Regulator Turn-Off Threshold
Voltage
V
REG
I
PRE-REGULATOR
= 10 mA Room 7.8 8.6 9.4
V
Undervoltage Lockout V
UVLO
Room 7.0 8.1 8.9
V
V
REG
−V
UVLO
V
DELTA
Room 0.3 0.6
Supply
Supply Current I
CC
C
L
= 500 pF at Pin 5 Room 0.85 1.5 mA
Bias Current I
BIAS
Room 10 15 20 mA
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 8.0
V
Input Current Input Voltage High I
IH
V
IN
= 10 V Room 1 5
mA
Input Current Input Voltage Low I
IL
V
IN
= 0 V Room −35 −25
mA
Output
Output High Voltage V
OH
I
OUT
= −10 mA
Room
Full
9.7
9.5
V
Output Low Voltage V
OL
I
OUT
= 10 mA
Room
Full
0.3
0.5
V
Output Resistance R
OUT
I
OUT
= 10 mA, Source or Sink
Room
Full
20
25
30
50
W
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, Cold and Hot = as determined by the operating temperature suffix.
c. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet.
d. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
e. Guaranteed by design, not subject to production test.
a. 250 V +V
IN
380 V place a 10-kW,
1
/
4
-W resistor in series with a +V
IN
(Pin1).
380 V +V
IN
450 V place a 15-kW,
1
/
4
-W resistor in series with a +V
IN
(Pin1).
Connect a 0.01-mfd capacitor between +V
IN
(Pin 1) and −V
IN
(Pin 6).
P1-P3P4-P6P7-P9P10-P10

SI9120DY-T1-E3

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Manufacturer:
Vishay / Siliconix
Description:
Switching Controllers Univ-Input Swmode Controller
Lifecycle:
New from this manufacturer.
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