SI9110 Vishay, SI9110 Datasheet

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SI9110

Manufacturer Part Number
SI9110
Description
High-voltage Switchmode Controllers
Manufacturer
Vishay
Datasheet

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DESCRIPTION
The Si9110/9111 are BiC/DMOS integrated circuits designed
for use as high-performance switchmode controllers. A
high-voltage DMOS input allows the controller to work over a
wide range of input voltages (10- to 120-VDC). Current-mode
PWM control circuitry is implemented in CMOS to reduce
internal power consumption to less than 10 mW.
A push-pull output driver provides high-speed switching for
MOSPOWER devices large enough to supply 50 W of output
Document Number: 70004
S-42037—Rev. H, 15-Nov-04
FEATURES
D 10- to 120-V Input Range
D Current-Mode Control
D High-Speed, Source-Sink Output Drive
D High Efficiency Operation (> 80%)
FUNCTIONAL BLOCK DIAGRAM
V
+V
BIAS
V
REF
CC
IN
10
1
6
2
Pre-Regulator/Start-Up
Current
Sources
Gen
Ref
FB
+
14
4 V
High-Voltage Switchmode Controllers
+
Amplifier
8.1 V
Error
8.6 V
Internal
Circuits
COMP
To
13
2 V
DISCHARGE
+
1.2 V
Undervoltage
Comparator
+
+
D Internal Start-Up Circuit
D Internal Oscillator (1 MHz)
D SHUTDOWN and RESET
9
Current-Mode
Comparator
Comparator
C/L
OSC
8
IN
OSC
power. When combined with an output MOSFET and
transformer, the Si9110/9111 can be used to implement
single-ended power converter topologies (i.e., flyback,
forward, and cuk).
The Si9110/9111 are 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.
OSC
OUT
Clock (
R
S
7
1
Q
/
2
f
OSC
Q
)
S
R
V
CC
D Reference Selection
V
Si9110 − "1%
Si9111 − "10%
To
12
11
CC
Vishay Siliconix
4
5
3
Si9110/9111
SHUTDOWN
RESET
OUTPUT
−V
SENSE
IN
www.vishay.com
1

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SI9110 Summary of contents

Page 1

... D Internal Start-Up Circuit D Internal Oscillator (1 MHz) D SHUTDOWN and RESET power. When combined with an output MOSFET and transformer, the Si9110/9111 can be used to implement single-ended power converter topologies (i.e., flyback, forward, and cuk). The Si9110/9111 are 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 − ...

Page 2

... Si9111 V = −V REF OSC R = 330 k, See Note f OSC R = 150 k, See Note f OSC Df/f=f(13.5 V) − f(9.5 V)/ f(9 Tied to COMP Si9110 OSC IN = OSC IN = − Si9111 (OSC Disabled) OSC IN = − OSC IN = − V OSC IN = − (OSC Disabled) Source ( ...

Page 3

... Room Room Room Room Room IN Room I = −10 mA OUT Room OUT Room mA, Source or Sink OUT Room 500 pF = 500 Room Si9110/9111 Vishay Siliconix D Suffix −40 to 85_C Min Typ Max 1.0 1.2 1.4 100 150 120 7.8 8.6 9.4 7.0 8.1 8.9 0.3 0.6 0.45 0.6 1.0 10 ...

Page 4

... Si9110/9111 Vishay Siliconix TIMING WAVEFORMS 1.5 V − 50% SENSE OUTPUT 0 − FIGURE 50% SHUTDOWN 0 − RESET 0 − TYPICAL CHARACTERISTICS +V vs Start- 140 V = − 120 100 (mA) IN FIGURE 4. www.vishay.com SHUTDOWN r 90% ...

Page 5

... Figure 6 gives the typical pre-regulator current at BiC/DMOS as a function of input voltage. BIAS (pin 2) will IN To properly set the bias for the Si9110/9111, a 390-kW resistor should be tied from BIAS (pin 1) to −V and V (pin 6). This determines the magnitude of bias current in all of the analog ...

Page 6

... Si9110/9111 Vishay Siliconix DETAILED DESCRIPTION (CONT’D) Applications which use a separate external reference, such as non-isolated converter topologies and circuits employing optical coupling in the feedback loop, do not require a trimmed voltage reference with 1% accuracy. accommodates the requirements of these applications at a lower cost, by leaving the reference voltage untrimmed. The 10% accurate reference thus provided is sufficient to establish a dc bias point for the error amplifier ...

Page 7

... Si9110 390 FIGURE 6. 5-Watt Power Supply for Telecom Applications For related documents such as package/tape drawings, part marking, and reliability data, see Si9110/9111 Vishay Siliconix 1N5822 220 1N5819 1N4148 To Pin 6 V 2N7004 Feedback To Pin 14 ...

Page 8

... Information contained herein is intended to provide a product description only. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right ...

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