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Power ICs - DC-DC Isolated Power Supplies - PWM Controllers

Power ICs - DC-DC Isolated Power Supplies - PWM Controllers
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Power ICs - DC-DC Isolated Power Supplies - PWM Controllers - 1

Si9110/9111 Vishay Siliconix Document Number: 70004 S-42037—Rev. H, 15-Nov-04 www.vishay.com 1 High-Voltage Switchmode Controllers FEATURES 10- 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% 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. FUNCTIONAL BLOCK DIAGRAM + - - + + - + - + - FB COMP DISCHARGE OSC 14 13 9 8 7 2 V Ref Gen R S Q R S Q SENSE 3 5 4 11 12 Current-Mode Comparator C/L 1.2 V Undervoltage 8.1 V RESET 8.6 V BIAS Current Sources To Internal Circuits 10 1 6 2 Comparator Error Amplifier VREF VCC +VIN VCC SHUTDOWN 4 V OSC OUT OSC IN -VIN Pre-Regulator/Start-Up OUTPUT To VCC Comparator Clock (1/2 fOSC)

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Power ICs - DC-DC Isolated Power Supplies - PWM Controllers - 2

Si9110/9111 Vishay Siliconix www.vishay.com 2 Document Number: 70004 S-42037—Rev. H, 15-Nov-04 ABSOLUTE MAXIMUM RATINGS Voltages Referenced to -VIN (Note: VCC < +VIN + 0.3 V) VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 V +VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 V Logic Inputs (RESET, SHUTDOWN, OSC IN, OSC OUT) . . . . . . . . . . . . . . . -0.3 V to VCC + 0.3 V Linear Inputs (FEEDBACK, SENSE, BIAS, VREF) . . . . . . . . . . . . . . . -0.3...

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Power ICs - DC-DC Isolated Power Supplies - PWM Controllers - 3

Si9110/9111 Vishay Siliconix Document Number: 70004 S-42037—Rev. H, 15-Nov-04 www.vishay.com 3 SPECIFICATIONSa D Suffix -40 to 85C Test Conditions Unless Otherwise Specified DISCHARGE = -VIN = 0 V VCC = 10 V, +VIN = 48 V Parameter RBIAS = 390 k , ROSC = 330 k Tempb Mind Typc Maxd Unit Symbol Current Limit Threshold Voltage VSOURCE VFB = 0 V Room 1.0 1.2 1.4 V Delay to Outpute td VSENSE = 1.5 V, See Figure 1 Room 100 150 ns Pre-Regulator/Start-Up Input Voltage +VIN IIN = 10 A Room 120 V Input Leakage Current +IIN VCC 9.4 V Room 10 A Pre-Regulator Start-Up Current ISTART Pulse Width 300 s,...

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Power ICs - DC-DC Isolated Power Supplies - PWM Controllers - 4

Si9110/9111 Vishay Siliconix www.vishay.com 4 Document Number: 70004 S-42037—Rev. H, 15-Nov-04 TIMING WAVEFORMS 90% OUTPUT SENSE 1.5 V - 50% 0 90% OUTPUT 0 - 0 - 50% 50% 50% RESET 50% 50% 0 - td tr 10 ns VCC VCC VCC tSW tLW tRW tf 10 ns VCC VCC tSD SHUTDOWN SHUTDOWN tr, tf 10 ns 50% 0 - 0 - FIGURE 1. FIGURE 2. FIGURE 3. TYPICAL CHARACTERISTICS +VIN vs. +IIN at Start-Up Output Switching Frequency vs. Oscillator Resistance (V) 140 120 100 80 60 40 20 0 10 15 20 VCC = -VIN +IIN (mA) +V IN (Hz) 1 M 10 k 100 k 10 k 100 k 1 M rOSC () f OUT FIGURE 4. FIGURE 5.

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Power ICs - DC-DC Isolated Power Supplies - PWM Controllers - 5

BIAS FB +VIN COMP SENSE RESET OUTPUT SHUTDOWN -VIN VREF VCC DISCHARGE OSC OUT OSC IN Dual-In-Line and SOIC 1 2 3 4 5 6 7 14 13 12 11 10 9 8 Top View Si9110/9111 Vishay Siliconix Document Number: 70004 S-42037—Rev. H, 15-Nov-04 www.vishay.com 5 PIN CONFIGURATIONS AND ORDERING INFORMATION ORDERING INFORMATION Part Number Temperature Range Package Si9110DY Si9110DY-T1 Si9110DY-T1—E3 SOIC-14 Si9111DY Si9111DY-T1 -40 to 85C Si9111DY-T1—E3 Si9110DJ Si9110DJ-—E3 PDIP 14 Si9111DJ PDIP-Si9111DJ-—E3 DETAILED DESCRIPTION Pre-Regulator/Start-Up Section Due to the low quiescent current requirement of...

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Power ICs - DC-DC Isolated Power Supplies - PWM Controllers - 6

Si9110/9111 Vishay Siliconix www.vishay.com 6 Document Number: 70004 S-42037—Rev. H, 15-Nov-04 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. 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...

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Power ICs - DC-DC Isolated Power Supplies - PWM Controllers - 7

Si9110/9111 Vishay Siliconix Document Number: 70004 S-42037—Rev. H, 15-Nov-04 www.vishay.com 7 APPLICATIONS Si9110 GND FEEDBACK -48 V 240 k 390 k 13 14 6 10 1 5 9 2 8 7 4 3 150 k 3 k 100 pF 2N7004 18 k 12 k 1N5822 1N5819 1N4148 VCC 0.1 F 20 F 0.022 F 0.1 F 1 F 220 F 47 F OSC SYNC PULSE (If Needed) +5 V @ 0.75 A -5 V @ 0.25 A To Pin 6 VCC Feedback To Pin 14 FIGURE 6. 5-Watt Power Supply for Telecom Applications 1 1/2 W Vishay Siliconix maintains worldwide manufacturing capability. Products may be manufactured at one of several qualified locations. Reliability data for Silicon Technology and...

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Power ICs - DC-DC Isolated Power Supplies - PWM Controllers - 8

Document Number: 91000 www.vishay.com Revision: 18-Jul-08 1 Disclaimer Legal Disclaimer Notice Vishay All product specifications and data are subject to change without notice. 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 herein or in any other disclosure relating to any product. Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any information...

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