VISHAY SI9114ADY

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
FB
5
CURRENT
COMPENSATION SENSE
6
13
SYNC
10
ROSC
8
Error
Amplifier
NI
4
B2
−
+
COSC
9
OSC
Out
OSC
Enable
2V
VREF
3
+
Ref
Gen
−
−
+
R
Q
S
4.6 V
SS
7
+
20 mA
12 DRIVER
OUTPUT
−
11
1.25 V
−VIN
−VIN
VCC
Substrate
20 mA
VCC
+VIN
14
Q
2
SHUTDOWN
R
1
−
−
−
+
Document Number: 70025
S-42044—Rev. E, 15-Nov-04
S
+
+
0.2 V
9.2 V
Undervoltage
Lockout
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Si9114A
Vishay Siliconix
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to −VIN
VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 V
+VIN (Note: VCC < +VIN + 0.3 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 V
Logic Input (SHUTDOWN, SYNC) . . . . . . . . . . . . . . . . −0.3 V to VCC + 0.3 V
Linear Inputs (FEEDBACK, SENSE,
SOFT-START) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to VCC + 0.3 V
HV Pre-Regulator Input Current (continuous) . . . . . . . . . . . . . . . . . . . . . 5 mA
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65 to 150_C
Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40 to 85_C
Junction Temperature (TJ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 (QJA)
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 −VIN
ROSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 kW to 1 MW
VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.5 V to 16.5 V
COSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 pF to 200 pF
+VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 V to 200 V
Linear Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to VCC − 4 V
fOSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 kHz to 2 MHz
Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to VCC
SPECIFICATIONS
Test Conditions
Unless Otherwise Specified
Parameter
Symbol
Limits
D Suffix −40 to 85_C
Oscillator Disabled
−VIN = 0 V, VCC = 10 V
Mina
Typb
Maxa
OSC Disabled, TA = 25_C
3.94
4.0
4.06
OSC Disabled
Over Voltage and Temperature Rangesc
3.88
4.0
4.12
Unit
Reference
Output Voltage
Short Circuit Current
Load Regulation
VR
V
ISREF
VREF = −VIN
−30
−5
mA
DVR/DIR
IREF = 0 to −1 mA
10
40
mV
Oscillator
Initial Accuracy
fOSCd
ROSC = 374 kW, COSC = 200 pF
90
100
110
ROSC = 70 kW, COSC = 200 pF
450
500
550
4
7
%
200
500
ppm/_C
kHz
Df/f
ROSC = 70 kW, COSC = 200 pF
Df/f = [f(16.5 V) − f(9.5 V)] / f(9.5 V)
Temperature Coefficientc
OSC TC
−40 v TA v 85_C, fOSC = 100 kHz
Sync Output Current (Master Mode)
ISYNC(M)
VROSC v 5 V
Sync Output Current (Slave Mode)
ISYNC(S)
VROSC = VCC
"1
"500
VFB = 5 V, NI = VREF
<1.0
"200
nA
"5
"25
mV
Voltage Stabilityc
"1.0
mA
"3.0
nA
Error Amplifier (COSC = −VIN OSC Disabled)
Input BIAS Current
IFB
Input OFFSET Voltage
VOS2
Open Loop Voltage Gainc
AVOL
Unity Gain
Bandwidthc
Output Current
Power Supply Rejection
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2
65
BW
IOUT
PSRR
1.8
Source (VFB = 3.5 V, NI = VREF)
80
dB
2.7
−2.7
Sink (VFB = 4.5 V, NI = VREF)
1.0
2.4
9.5 V v VCC v 16.5 V
50
80
MHz
−1.0
mA
dB
Document Number: 70025
S-42044—Rev. E, 15-Nov-04
Si9114A
Vishay Siliconix
SPECIFICATIONS
Test Conditions
Unless Otherwise Specified
Parameter
Symbol
Oscillator Disabled
−VIN = 0 V, VCC = 10 V
Limits
D Suffix −40 to 85_C
Mina
Typb
Maxa
t1
10
Unit
Pre-Regulator/Start-Up
Input Leakage Current
Pre-Regulator Start-Up Current
VCC Pre-Regulator Voltage
+IIN
+VIN = 200 V, VCC w 10 V
ISTART
+VIN = 48 V, tPW v 300 ms, VCC = VUVLO
8
20
VPR
+VIN = 48 V
8.8
9.1
9.4
mA
mA
VPR −VUVLO (Turn-On)
VDELTA
0.1
0.25
0.7
Undervoltage Lockout Hysteresis
VHYST
0.18
0.28
0.4
fOSC = 100 kHz
1.5
2.5
fOSC = 500 kHz
2.2
3.0
V
Supply
Supply Current
ICC
CLOAD v 50 pF
mA
Protection
Current Limit Threshold Voltage
VSENSE
VFB = 0 V, NI = VREF
1.23
1.30
V
Current Limit Delay to Outputc
td
VSENSE = 1.5 V, See Figure 1
77
100
ns
SHUTDOWN Logic Threshold
VSD
2.8
0.5
V
SHUTDOWN Delay to Latched Outputc
tSD
See Figure 2
0.20
1.0
ms
SHUTDOWN Pull-Up Current
ISD
VSD = 0 V
12
23
30
Soft-Start Current
ISS
12
23
30
1.6
0.5
Output Inhibit Voltage
VSS(off)
Soft-Start Voltage to Disable Driver Output
Output High Voltage
VOH
IOUT = −10 mA
Output Low Voltage
VOL
IOUT = 10 mA
1.15
mA
V
MOSFET Driver
Peak Output Currentc
ISOURCE
VOUT = 0 V
ISINK
VOUT = VCC
9.85
500
9.9
0.05
0.15
−400
−200
1000
V
mA
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. CSTRAY v 5 pF on COSC.
Document Number: 70025
S-42044—Rev. E, 15-Nov-04
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Si9114A
Vishay Siliconix
TYPICAL CHARACTERISTICS
Oscillator Frequency
1000
tr for CL = 2500 pF
Output Rise and Fall Time (ns)
100 pF
150 pF
200 pF
f OUT (kHz)
Output Driver Rise and Fall Time
80
47 pF
100
Note: These curves were measured
in a board with 3.5 pF of
external parasitic
capacitance.
60
tf for CL = 2500 pF
40
tr for CL = 1000 pF
tf for CL = 1000 pF
20
tr 10% to 90%
tf 90% to 10%
0
10
10
100
0
1000
9
10
rOSC − Oscillator Resistance (kW)
Supply Current vs. Output Frequency
36
14
15
16
17
16
CL = 1000 pF
12
8
CL = 0 pF
4
9
I CC − Supply Current (mA)
I CC − Supply Current (mA)
CL = 2500 pF
20
13
ROSC = 127 kW
COSC = 47 pF
fs = 500 kHz
28
24
12
Supply Current vs. Supply Voltage
12
VCC = 12 V
COSC = 47 pF
32
11
VCC − Supply Voltage (V)
CL = 1000 pF
6
3
CL = 0 pF
0
0
0
200
400
600
800
1000
0
9
10
11
12
13
14
15
16
17
VCC − Supply Voltage (V)
fOUT − Output Frequency (kHz)
Switching Frequency vs. Supply Voltage
1.05
ROSC = 56 kW
COSC = 47 pF
Switching Frequency (MHz)
1.00
0.95
0.90
0.85
0
8
9
10
11
12
13
14
15
16
17
VCC − Supply Voltage (V)
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Document Number: 70025
S-42044—Rev. E, 15-Nov-04
Si9114A
Vishay Siliconix
TIMING WAVEFORMS
Current
Sense
VCC
1.5 V−
tr v 10 ns
50%
0
Output
SHUTDOWN
tf v 10 ns
50%
tSD
td
VCC
VCC−
90%
90%
Output
0
0
FIGURE 1.
FIGURE 2.
PIN CONFIGURATIONS AND ORDERING INFORMATION
Dual-In-Line and SOIC
ORDERING INFORMATION
Part Number
+VIN
1
14
VCC
SHUTDOWN
2
13
CURRENT SENSE
Si9114ADY
12
DRIVER OUTPUT
Si9114ADY-T1
Si9114ADY-T1—E3
VREF
3
NI
4
11
−VIN
FB
5
10
SYNC
COMPENSATION
6
9
COSC
SS
7
8
ROSC
Temperature Range
Package
SOIC-14
−40 to 85_C
Si9114ADJ
PDIP-14
Si9114ADJ—E3
Top View
APPLICATIONS
VO
Si9420DY
VCC
+VIN
SD
SENSE
VREF
OUT
−VIN
NI
FB
SYNC
COMP COSC
SS
ROSC
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
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