Si9110, Si9111
Vishay Siliconix
High-Voltage Switchmode Controllers
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 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.
FEATURES
• • • • • • • • 10 V to 120 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 Reference Selection Si9110 - ± 1 % Si9111 - ± 10 %
FUNCTIONAL BLOCK DIAGRAM
FB 14 13
COMP
DISCHARGE 9
OSC IN 8
OSC OUT 7
Error Amplifier 10
OSC Clock (1/2 fOSC)
+ 4V 2V Ref Gen
To VCC
VREF
+
Current-Mode Comparator
4 R Q S 5
OUTPUT
- VIN
+
1 BIAS 6 Current Sources To Internal Circuits 1.2 V
C/L Comparator 3 VCC SENSE
VCC
+VIN
2
8.1 V +
Undervoltage Comparator Q
S R
11 12
SHUTDOWN RESET
+ 8.6 V
Pre-Regulator/Start-Up
Document Number: 70004 S11-0975-Rev. I, 16-May-11
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This document is subject to change without notice. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
Si9110, Si9111
Vishay Siliconix
ABSOLUTE MAXIMUM RATINGS
Parameter Voltages Referenced to - VIN (Note: VCC < + VIN + 0.3 V) VCC +VIN Logic Inputs (RESET, SHUTDOWN, OSC IN, OSC OUT) Linear Inputs (FEEDBACK, SENSE, BIAS, VREF) HV Pre-Regulator Input Current (continuous) Storage Temperature Operating Temperature Junction Temperature (TJ) Power Dissipation (Package)a Thermal Impedance (JA) 14-Pin Plastic DIP (J Suffix)b 14-Pin SOIC (Y Suffix)c 14-Pin Plastic DIP 14-Pin SOIC Limit 15 120 - 0.3 to VCC + 0.3 - 0.3 to VCC + 0.3 5 - 65 to 150 - 40 to 85 150 750 900 167 140 Unit
V
mA °C
mW °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
Parameter Voltages Referenced to - VIN VCC + VIN fOSC ROSC Linear Inputs Digital Inputs Limit 9.5 to 13.5 10 to 120 40 kHzto 1 MHz 25 kto 1 M 0 to VCC - 3 0 to VCC Unit
V
V
SPECIFICATIONSa
Test Conditions Unless Otherwise Specified DISCHARGE = - VIN = 0 V VCC = 10 V, + VIN = 48 V RBIAS = 390 k, ROSC = 330 k Si9110 Si9111 Si9110 Si9111 D Suffix - 40 °C to 85 °C Temp.b Room Room Full Full Room Room Full Room Room Room Room Full Min.d 3.92 3.60 3.86 3.52 15 70 30 100 0.5 3 100 200 10 200 Typ.c 4.0 4.0 Max.d 4.08 4.40 4.14 4.46 45 130 1.0 k µA mV/°C MHz 120 240 15 500 kHz % ppm/°C V
Parameter Reference
Symbol
Unit
Output Voltage
VR
OSC IN = - VIN (OSC Disabled) RL = 10 M
Output Short Circuit Current Temperature Stabilitye Oscillator Maximum Frequencye Initial Accuracy Voltage Stability Temperature Coefficiente
Impedancee
ZOUT ISREF TREF fMAX fOSC f/f TOSC
VREF = - VIN
ROSC = 0 ROSC = 330 k, See Note f ROSC = 150 k, See Note f f/f = f(13.5 V) - f(9.5 V)/f(9.5 V)
1 80 160
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Document Number: 70004 S11-0975-Rev. I, 16-May-11
This document is subject to change without notice. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
Si9110, Si9111
Vishay Siliconix
SPECIFICATIONSa
Test Conditions Unless Otherwise Specified DISCHARGE = - VIN = 0 V VCC = 10 V, + VIN = 48 V RBIAS = 390 k, ROSC = 330 k FB Tied to COMP OSC IN = - VIN, (OSC Disabled) OSC IN = - VIN, VFB = 4 V OSC IN = - VIN (OSC Disabled) Source (VFB = 3.4 V) Sink (VFB = 4.5 V) 9.5 V VCC 13.5 V VFB = 0 VSENSE = 1.5 V, See Figure 1 IIN = 10 µA VCC 9.4 V Pulse Width 300 µs, VCC = VULVO IPRE-REGULATOR = 10 µA Si9110 Si9111 D Suffix - 40 °C to 85 °C Temp.b Room Room Room Room Room Room Room Room Room Room Room Room Room Room Room Room Room Room VLOAD 75 pF (Pin 4) Room Room CL = 500 pF, VSENSE = - VIN, See Figure 2 See Figure 3 Room Room Room See Figure 3 Room Room Room VIN = 10 V VIN = 0 V IOUT = - 10 mA IOUT = 10 mA IOUT = 10 mA, Source or Sink Room Room Room Full Room Full Room Full Room - 35 9.7 9.5 0.30 0.50 30 50 75 75 8.0 1 - 25 5 50 50 25 2.0 V µA ns 8 7.8 7.0 0.3 0.45 10 15 8.6 8.1 0.6 0.6 15 50 1.0 20 100 mA µA 9.4 8.9 V 120 10 0.12 50 1.0 60 1 Min.d 3.96 3.60 Typ.c 4.00 4.00 25 ± 15 80 1.3 1000 - 2.0 0.15 70 1.2 100 1.4 150 2000 - 1.4 Max.d 4.04 4.40 500 ± 40 Unit
Parameter Error Amplifier Feedback Input Voltage Input BIAS Current Input OFFSET Voltage Open Loop Voltage Gaine Unity Gain Bandwidth
e
Symbol
VFB IFB VOS AVOL BW ZOUT IOUT PSRR VSOURCE td + VIN + IIN ISTART VREG VUVLO VDELTA ICC IBIAS tSD tSW tRW tLW VIL VIH IIH IIL VOH VOL ROUT tr
V nA mV dB MHz mA dB V ns V µA mA
Dynamic Output Impedancee Output Current Power Supply Rejection Current Limit Threshold Voltage Delay to Output Pre-Regulator/Start-Up Input Voltage Input Leakage Current Pre-Regulator Start-Up Current VCC Pre-Regulator Turn-Off Threshold Voltage Undervoltage Lockout VREG - VUVLO Supply Supply Current Bias Current Logic SHUTDOWN Delaye SHUTDOWN Pulse Widthe RESET Pulse Widthe Latching Pulse Width SHUTDOWN and RESET Lowe Input Low Voltage Input High Voltage Input Current Input Voltage High Input Current Input Voltage Low Output Output High Voltage Output Low Voltage Output Resistance Rise Timee
e e
V ns
CL = 500 pF tf Room Fall Time 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. CSTRAY Pin 8 = 5 pF. Document Number: 70004 S11-0975-Rev. I, 16-May-11
20 25 40 40
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This document is subject to change without notice. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
Si9110, Si9111
Vishay Siliconix
TIMING WAVEFORMS
1.5 V SENSE 0 VCC OUTPUT 0-
50 % td
tr ≤ 10 ns
VCC SHUTDOWN 0-
50 % tSD
tf ≤ 10 ns
90 %
VCC OUTPUT 0 -
90 %
Figure 1.
Figure 2.
tSW VCC SHUTDOWN 0 VCC RESET 0 50 % 50 % tRW 50 % 50 % 50 % tLW tr, tf ≤ 10 ns
-
-
Figure 3.
TYPICAL CHARACTERISTICS
140 VCC = - VIN 120 100 +V IN (V) 80 60 40 20 0 10 15 +IIN (mA) 20 f OUT (Hz)
1M
100 k
10 k 10 k 100 k rOSC (Ω) 1M
Figure 4. + VIN vs. + IIN at Start-Up
Figure 5. Output Switching Frequency vs. Oscillator Resistance
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Document Number: 70004 S11-0975-Rev. I, 16-May-11
This document is subject to change without notice. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
Si9110, Si9111
Vishay Siliconix
PIN CONFIGURATIONS AND ORDERING INFORMATION
Dual-In-Line and SOIC
BIAS +VIN SENSE OUTPUT - VIN VCC OSC OUT 1 2 3 4 5 6 7 Top View 14 FB 13 COMP 12 RESET 11 SHUTDOWN 10 VREF 9 8 DISCHARGE OSC IN
ORDERING INFORMATION
Part Number Si9110DY Si9110DY-T1 Si9110DY-T1-E3 Si9111DY Si9111DY-T1 Si9111DY-T1-E3 Si9110DJ Si9110DJ-E3 Si9111DJ Si9111DJ-E3 PDIP-14 - 40 °C to 85 °C SOIC-14 Temperature Range Package
DETAILED DESCRIPTION
Pre-Regulator/Start-Up Section Due to the low quiescent current requirement of the Si9110/ 9111 control circuitry, bias power can be supplied from the unregulated input power source, from an external regulated low-voltage supply, or from an auxiliary "bootstrap" winding on the output inductor or transformer. When power is first applied during start-up, + VIN (pin 2) will draw a constant current. The magnitude of this current is determined by a high-voltage depletion MOSFET device which is connected between + VIN and VCC (pin 6). This start-up circuitry provides initial power to the IC by charging an external bypass capacitance connected to the VCC pin. The constant current is disabled when VCC exceeds 8.6 V. If VCC is not forced to exceed the 8.6 V threshold, then VCC will be regulated to a nominal value of 8.6 V by the pre-regulator circuit. As the supply voltage rises toward the normal operating conditions, an internal undervoltage (UV) lockout circuit keeps the output driver disabled until VCC exceeds the undervoltage lockout threshold (typically 8.1 V). This guarantees that the control logic will be functioning properly and that sufficient gate drive voltage is available before the MOSFET turns on. The design of the IC is such that the undervoltage lockout threshold will be at least 300 mV less than the pre-regulator turn-off voltage. Power dissipation can be minimized by providing an external power source to VCC such that the constant current source is always disabled. Note: During start-up or when VCC drops below 8.6 V the start-up circuit is capable of sourcing up to 20 mA. This may lead to a high level of power dissipation in the IC (for a 48 V input, approximately 1 W). Excessive start-up time caused by external loading of the VCC supply can result in device damage. Figure 6 gives the typical pre-regulator current at BiC/DMOS as a function of input voltage. BIAS To properly set the bias for the Si9110/9111, a 390 k resistor should be tied from BIAS (pin 1) to - VIN (pin 5). This determines the magnitude of bias current in all of the analog
Document Number: 70004 S11-0975-Rev. I, 16-May-11 www.vishay.com 5
sections and the pull-up current for the SHUDOWN and RESET pins. The current flowing in the bias resistor is nominally 15 µA. Reference Section The reference section of the Si9110 consists of a temperature compensated buried zener and trimmable divider network. The output of the reference section is connected internally to the non-inverting input of the error amplifier. Nominal reference output voltage is 4 V. The trimming procedure that is used on the Si9110 brings the output of the error amplifier (which is configured for unity gain during trimming) to within ± 1 % of 4 V. This compensates for input offset voltage in the error amplifier. The output impedance of the reference section has been purposely made high so that a low impedance external voltage source can be used to override the internal voltage source, if desired, without otherwise altering the performance of the device. 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. The Si9111 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. Error Amplifier Closed-loop regulation is provided by the error amplifier, which is intended for use with "around-the-amplifier" compensation. A MOS differential input stage provides for low input current. The noninverting input to the error amplifier (VREF) is internally connected to the output of the reference supply and should be bypassed with a small capacitor to ground.
This document is subject to change without notice. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
Si9110, Si9111
Vishay Siliconix
DETAILED DESCRIPTION (CONT’D)
Oscillator Section The oscillator consists of a ring of CMOS inverters, capacitors, and a capacitor discharge switch. Frequency is set by an external resistor between the OSC IN and OSC OUT pins. (See Figure 5 for details of resistor value vs. frequency.) The DISCHARGE pin should be tied to - VIN for normal internal oscillator operation. A frequency divider in the logic section limits switch duty cycle to 50 % by locking the switching frequency to one half of the oscillator frequency. Remote synchronization is accomplished by capacitive coupling of a positive SYNC pulse into the OSC IN (pin 8) terminal. For a 5 V pulse amplitude and 0.5 µs pulse width, typical values would be 100 pF in series with 3 k to pin 8. SHUTDOWN and RESET SHUTDOWN (pin 11) and RESET (pin 12) are intended for overriding the output MOSFET switch via external control logic. The two inputs are fed through a latch preceding the output switch. Depending on the logic state of RESET, SHUTDOWN can be either a latched or unlatched input. The output is off whenever SHUTDOWN is low. By simultaneously having SHUTDOWN and RESET low, the latch is set and SHUTDOWN has no effect until RESET goes high. The truth table for these inputs is given in Table 1. Table 1. Truth Table for the SHUTDOWN and RESET Pins
SHUTDOWN H H L L H L L RESET H Output Normal Operation Normal Operation (No Change) Off (Not Latched) Off (Latched) Off (Latched, No Change)
Both pins have internal current source pull-ups and should be left disconnected when not in use. An added feature of the current sources is the ability to connect a capacitor and an open-collector driver to the SHUTDOWN or RESET pins to provide variable shutdown time. Output Driver The push-pull driver output has a typical on-resistance of 20 . Maximum switching times are specified at 75 ns for a 500 pF load. This is sufficient to directly drive MOSFETs such as the 2N7004, 2N7005, IRFD120 and IRFD220. Larger devices can be driven, but switching times will be longer, resulting in higher switching losses. In order to drive large MOSPOWER devices, it is necessary to use an external driver IC, such as the Vishay Siliconix D469A. The D469A can switch very large devices such as the SMM20N50 (500 V, 0.3 ) in approximately 100 ns.
APPLICATIONS
1N5822 GND OSC SYNC PULSE (If Needed) 220 µF +5V at 0.75 A
3k 2 0.022 µF 0.1 µF 20 µF 240 k FEEDBACK VCC 13 14 6 10 0.1 µF 390 k - 48 V 1 100 pF 8 150 k 1N4148 47 µF 1N5819 -5V at 0.25 A
Si9110
7 4 3 1Ω 2N7004 1 µF 18 k 12 k
To Pin 6 VCC Feedback To Pin 14
5
9
1/ W 2
Figure 6. 5 Watt Power Supply for Telecom Applications
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 www.vishay.com/ppg?70004.
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Document Number: 70004 S11-0975-Rev. I, 16-May-11
This document is subject to change without notice. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
Package Information
Vishay Siliconix
SOIC (NARROW): 14-LEAD (POWER IC ONLY)
MILLIMETERS Dim A A1 B C D E e H L Ø
0.25 (GAGE PLANE) H
INCHES Min
0.053 0.004 0.015 0.007 0.336 0.149 0.228 0.020 0_
Min
1.35 0.10 0.38 0.18 8.55 3.8 5.80 0.50 0_
Max
1.75 0.20 0.51 0.23 8.75 4.00
Max
0.069 0.008 0.020 0.009 0.344 0.157 0.244 0.037 8_
14
13
12
11
10
9
8 E
1
2
3
4
5
6
7
1.27 BSC 6.20 0.93 8_
0.050 BSC
D A
ECN: S-40080—Rev. A, 02-Feb-04 DWG: 5914 C ALL LEADS
e
B
A1
L
Ø
0.101 mm 0.004″
Document Number: 72809 28-Jan-04
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Package Information
Vishay Siliconix
PDIP: 14-LEAD (POWER IC ONLY)
14
13
12
11
10
9
8 E1 E
1
2
3
4
5
6
7
D S Q1
A
A1
L 15° MAX eA
B1
e1
B
C
Dim A A1 B B1 C D E E1 e1 eA L Q1 S
MILLIMETERS Min Max
3.81 0.38 0.38 0.89 0.20 17.27 7.62 5.59 2.29 7.37 2.79 1.27 1.02 5.08 1.27 0.51 1.65 0.30 19.30 8.26 7.11 2.79 7.87 3.81 2.03 2.03
INCHES Min Max
0.150 0.015 0.015 0.035 0.008 0.680 0.300 0.220 0.090 0.290 0.110 0.050 0.040 0.200 0.050 0.020 0.065 0.012 0.760 0.325 0.280 0.110 0.310 0.150 0.080 0.080
ECN: S-40081—Rev. A, 02-Feb-04 DWG: 5919
Document Number: 72814 28-Jan-04
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Vishay
Disclaimer
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE. Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other disclosure relating to any product. Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special, consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular purpose, non-infringement and merchantability. Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of typical requirements that are often placed on Vishay products in generic applications. Such statements are not binding statements about the suitability of products for a particular application. It is the customer’s responsibility to validate that a particular product with the properties described in the product specification is suitable for use in a particular application. Parameters provided in datasheets and/or specifications may vary in different applications and performance may vary over time. All operating parameters, including typical parameters, must be validated for each customer application by the customer’s technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed therein. Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining applications or for any other application in which the failure of the Vishay product could result in personal injury or death. Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk and agree to fully indemnify and hold Vishay and its distributors harmless from and against any and all claims, liabilities, expenses and damages arising or resulting in connection with such use or sale, including attorneys fees, even if such claim alleges that Vishay or its distributor was negligent regarding the design or manufacture of the part. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000 Revision: 11-Mar-11
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