SI9114A [VISHAY]
High-Frequency Switchmode Controller; 高频开关模式控制器
| 型号： | SI9114A |
| 厂家： | 
VISHAY |
| 描述： | High-Frequency Switchmode Controller |
| 文件： | 总5页 (文件大小：81K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Si9114A
Vishay Siliconix
High-Frequency Switchmode Controller
FEATURES
D 15- to 200-V Input Range
D Current-Mode Control
D Internal Start-Up Circuit
D Latched SHUTDOWN
D Soft-Start
D 1.8-MHz Error Amp
DESCRIPTION
The Si9114A is a BiC/DMOS current-mode pulse width
modulation (PWM) controller IC for high-frequency dc/dc
converters. Single-ended topologies (forward and flyback) can
be implemented at frequencies up to 1 MHz. The oscillator has
an internal divide-by-two that limits the duty ratio to 50%. An
oscillator sync output allows converters to be synchronized in
phase as well as in frequency, in a master/slave configuration.
The high-voltage DMOS transistor allows the IC to interface
directly to bus voltages up to 200 V. Other features include a
1.5% accurate voltage reference, 1.8-MHz (min) bandwidth
error amplifier, shutdown logic control, soft-start and
undervoltage lockout circuits.
The output inverter can typically source 500 mA and sink
700 mA. Shoot-through current is all but eliminated to minimize
supply current requirements.
The Si9114A is available in both standard and lead (Pb)-free
14-pin plastic DIP and SOIC packages, and is specified over
the industrial, D suffix (−40_C to 85_C) temperature range.
FUNCTIONAL BLOCK DIAGRAM
CURRENT
SYNC
10
R
C
OSC
9
FB
5
COMPENSATION SENSE
OSC
6
13
8
OSC
Out
Error
Amplifier
B 2
OSC
−
4
3
NI
+
Enable
2 V
−
+
−
Ref
R
S
V
REF
+
Gen
Q
4.6 V
+
12
11
DRIVER
OUTPUT
20 mA
−
7
SS
1.25 V
−V
IN
V
CC
−V
IN
Substrate
20 mA
2
14
1
SHUTDOWN
S
R
V
CC
Q
+V
IN
−
+
−
Undervoltage
Lockout
0.2 V
9.2 V
−
+
+
Document Number: 70025
S-42044—Rev. E, 15-Nov-04
www.vishay.com
1
Si9114A
Vishay Siliconix
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to −V
Power Dissipation (Package)a
IN
b
14-Pin Plastic Dip (J Suffix) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 750 mW
V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 V
c
14-Pin SOIC (Y Suffix) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 900 mW
+V (Note: V < +V + 0.3 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 V
IN
CC
IN
Logic Input (SHUTDOWN, SYNC) . . . . . . . . . . . . . . . . −0.3 V to V + 0.3 V
Thermal Impedance (Q )
JA
CC
14-Pin Plastic Dip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167_C/W
Linear Inputs (FEEDBACK, SENSE,
SOFT-START) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to V + 0.3 V
14-Pin SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140_C/W
CC
HV Pre-Regulator Input Current (continuous) . . . . . . . . . . . . . . . . . . . . . 5 mA
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65 to 150_C
Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40 to 85_C
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.
Junction Temperature (T ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150_C
J
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
R
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 kW to 1 MW
IN
OSC
V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.5 V to 16.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 pF to 200 pF
OSC
+V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 V to 200 V
IN
Linear Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to V − 4 V
CC
f
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 kHz to 2 MHz
Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to V
CC
OSC
SPECIFICATIONS
Test Conditions
Limits
D Suffix −40 to 85_C
Unless Otherwise Specified
Oscillator Disabled
Parameter
Reference
Symbol
Mina
Typb
Maxa
Unit
−V = 0 V, V = 10 V
IN
CC
OSC Disabled, T = 25_C
3.94
3.88
4.0
4.0
4.06
4.12
A
Output Voltage
V
R
V
OSC Disabled
c
Over Voltage and Temperature Ranges
Short Circuit Current
Load Regulation
I
V
= −V
IN
−30
−5
mA
mV
SREF
REF
DV /DI
I
= 0 to −1 mA
10
40
R
R
REF
Oscillator
R
= 374 kW, C
= 200 pF
= 200 pF
= 200 pF
90
100
500
110
550
OSC
OSC
OSC
OSC
d
Initial Accuracy
f
kHz
%
OSC
R
= 70 kW, C
450
OSC
R
= 70 kW, C
OSC
c
Voltage Stability
Df/f
4
7
Df/f = [f(16.5 V) − f(9.5 V)] / f(9.5 V)
c
Temperature Coefficient
OSC TC
−40 v T v 85_C, f
= 100 kHz
200
"3.0
"1
500
ppm/_C
mA
A
OSC
Sync Output Current (Master Mode)
Sync Output Current (Slave Mode)
I
V
v 5 V
"1.0
SYNC(M)
ROSC
I
V
ROSC
= V
CC
"500
nA
SYNC(S)
Error Amplifier (COSC = −VIN OSC Disabled)
Input BIAS Current
I
V
FB
= 5 V, NI = V
REF
<1.0
"5
80
"200
"25
nA
mV
dB
FB
Input OFFSET Voltage
Open Loop Voltage Gain
V
OS2
c
A
VOL
65
c
Unity Gain Bandwidth
BW
1.8
2.7
−2.7
2.4
80
MHz
Source (V = 3.5 V, NI = V
)
−1.0
FB
REF
Output Current
I
mA
dB
OUT
Sink (V = 4.5 V, NI = V
)
1.0
50
FB
REF
Power Supply Rejection
PSRR
9.5 V v V v 16.5 V
CC
Document Number: 70025
S-42044—Rev. E, 15-Nov-04
www.vishay.com
2
Si9114A
Vishay Siliconix
SPECIFICATIONS
Test Conditions
Limits
D Suffix −40 to 85_C
Unless Otherwise Specified
Oscillator Disabled
Parameter
Symbol
−V = 0 V, V = 10 V
Mina
Typb
Maxa
Unit
IN
CC
Pre-Regulator/Start-Up
Input Leakage Current
+I
+V = 200 V, V w 10 V
t1
20
10
mA
IN
IN
CC
Pre-Regulator Start-Up Current
I
+V = 48 V, t
v 300 ms, V = V
8
mA
START
IN
PW
CC
UVLO
V
V
Pre-Regulator Voltage
V
+V = 48 V
IN
8.8
0.1
0.18
9.1
9.4
0.7
0.4
CC
PR
PR
−V
UVLO
(Turn-On)
V
0.25
0.28
V
DELTA
Undervoltage Lockout Hysteresis
V
HYST
Supply
f
f
= 100 kHz
= 500 kHz
1.5
2.2
2.5
3.0
OSC
Supply Current
I
C
LOAD
v 50 pF
mA
CC
OSC
Protection
Current Limit Threshold Voltage
V
V
= 0 V, NI = V
REF
1.15
1.23
77
1.30
100
0.5
1.0
30
V
ns
V
SENSE
FB
c
Current Limit Delay to Output
t
d
V
= 1.5 V, See Figure 1
SENSE
SHUTDOWN Logic Threshold
SHUTDOWN Delay to Latched Output
SHUTDOWN Pull-Up Current
Soft-Start Current
V
2.8
0.20
23
SD
SD
SD
SS
c
t
I
I
See Figure 2
ms
V
SD
= 0 V
12
12
mA
23
30
Output Inhibit Voltage
V
SS(off)
Soft-Start Voltage to Disable Driver Output
1.6
0.5
V
MOSFET Driver
Output High Voltage
Output Low Voltage
V
I
= −10 mA
9.85
500
9.9
OH
OUT
V
V
I
= 10 mA
0.05
−400
1000
0.15
OL
SOURCE
OUT
I
V
= 0 V
−200
OUT
c
Peak Output Current
mA
I
V
= V
OUT CC
SINK
Notes
a. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum.
b. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
c. Guaranteed by design, not subject to production test.
d.
C
STRAY
v 5 pF on C
.
OSC
Document Number: 70025
S-42044—Rev. E, 15-Nov-04
www.vishay.com
3
Si9114A
Vishay Siliconix
TYPICAL CHARACTERISTICS
Oscillator Frequency
Output Driver Rise and Fall Time
80
60
40
20
0
1000
47 pF
t for C = 2500 pF
r
L
100 pF
150 pF
200 pF
t for C = 2500 pF
f
L
100
t for C = 1000 pF
r
L
t for C = 1000 pF
f
L
Note: These curves were measured
in a board with 3.5 pF of
external parasitic
t 10% to 90%
t 90% to 10%
r
f
capacitance.
10
10
100
1000
0
9
10
11
12
13
14
15
16 17
r
− Oscillator Resistance (kW)
V
CC
− Supply Voltage (V)
OSC
Supply Current vs. Output Frequency
Supply Current vs. Supply Voltage
12
9
36
32
28
24
V
= 12 V
OSC
CC
R
C
= 127 kW
OSC
OSC
C
= 47 pF
= 47 pF
fs = 500 kHz
C
L
= 1000 pF
C
L
= 2500 pF
20
16
12
6
C
L
= 1000 pF
3
8
4
C
L
= 0 pF
C
L
= 0 pF
0
0
0
200
400
600
800
1000
0
9
10
11
V − Supply Voltage (V)
CC
12
13
14
15
16 17
f
− Output Frequency (kHz)
OUT
Switching Frequency vs. Supply Voltage
1.05
1.00
R
OSC
C
OSC
= 56 kW
= 47 pF
0.95
0.90
0.85
0
8
9
10
11
12
13
14
15
16 17
V
CC
− Supply Voltage (V)
Document Number: 70025
S-42044—Rev. E, 15-Nov-04
www.vishay.com
4
Si9114A
Vishay Siliconix
TIMING WAVEFORMS
V
V
CC
1.5 V−
t v 10 ns
f
t v 10 ns
SHUTDOWN
Current
50%
r
50%
Sense
0
t
t
d
SD
−
CC
Output
V
CC
90%
90%
Output
0
0
FIGURE 1.
FIGURE 2.
PIN CONFIGURATIONS AND ORDERING INFORMATION
Dual-In-Line and SOIC
ORDERING INFORMATION
Part Number
Temperature Range
Package
+V
V
CC
IN
1
2
3
4
5
6
7
14
13
12
11
10
9
SHUTDOWN
CURRENT SENSE
DRIVER OUTPUT
Si9114ADY
V
REF
Si9114ADY-T1
Si9114ADY-T1—E3
Si9114ADJ
SOIC-14
−40 to 85_C
NI
−V
IN
FB
SYNC
PDIP-14
Si9114ADJ—E3
COMPENSATION
SS
C
OSC
R
OSC
8
Top View
APPLICATIONS
V
O
Si9420DY
+V
IN
V
CC
SD
SENSE
OUT
V
REF
NI
−V
IN
FB
SYNC
COMP
SS
C
OSC
R
OSC
TL431
Si9114A
−48 V (−42 to −56 V)
FIGURE 3. 15-W Forward Converter Schematic
Vishay Siliconix maintains worldwide manufacturing capability. Products may be manufactured at one of several qualified locations. Reliability data for Silicon Technology and
Package Reliability represent a composite of all qualified locations. For related documents such as package/tape drawings, part marking, and reliability data, see
http://www.vishay.com/ppg?70025.
Document Number: 70025
S-42044—Rev. E, 15-Nov-04
www.vishay.com
5
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