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Vishay Siliconix SI9102DN02-E3
- Part No.:
- SI9102DN02-E3
- Manufacturer:
- Vishay Siliconix
- Package:
- 20-LCC (J-Lead)
- Datasheet:
-
SI9102DN02-E3.pdf
- Description:
- IC REG FLYBACK 20PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,848
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Product details
Overview
SI9102DN02-E3 from Vishay Siliconix is a high-voltage, current-mode switchmode regulator IC integrating a 200 V, 7 Ω lateral DMOS power switch, internal 1 MHz oscillator, and error amplifier. It operates directly from 10–120 V DC input, delivers up to 3 W in flyback or forward topologies, and features shutdown/reset control with undervoltage lockout (8.8 V) and internal start-up current source. Used in telecom double-battery power supplies and isolated industrial DC-DC converters.
For engineers reviewing the SI9102DN02-E3 datasheet, SI9102DN02-E3 pinout, SI9102DN02-E3 application, or SI9102DN02-E3 equivalent, key selection considerations include its integrated 200 V MOSFET, 1 MHz oscillator programmability via ROSC, current-mode control architecture, -40 °C to +85 °C industrial temperature rating, and PLCC-20 lead-free package compatibility.
Technical Context
The SI9102DN02-E3 implements a monolithic BiC/DMOS current-mode controller with an internal 200 V, 7 Ω DMOS switch and dedicated pre-regulator circuitry that sources up to 20 mA during startup. Its oscillator frequency (40 kHz–1 MHz) is set by an external resistor between OSC IN and OSC OUT pins, and output duty cycle is limited to ≤50% via internal frequency division.
Control logic includes latched/unlatched SHUTDOWN and RESET inputs with internal pull-up current sources, a 4.0 V reference with ±1% initial accuracy, and an error amplifier configured for "around-the-amplifier" compensation. The device uses a body-drain diode intrinsic to the DMOS switch, with body tied internally to -VIN independent of SOURCE.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 10 V to 120 V DC - enables direct connection to unregulated HV rails without external pre-regulation. |
| Integrated MOSFET | 200 V VBR(DSS), 7 Ω rDS(on) - supports flyback/forward topologies up to 3 W with minimal external components. |
| Oscillator Frequency | 40 kHz to 1 MHz - adjustable via external ROSC resistor (25 kΩ to 1 MΩ), enabling optimization of size vs. efficiency. |
| Reference Voltage | 4.00 V ±1% at 25 °C - trimmed during production; used as error amplifier non-inverting input for stable closed-loop regulation. |
| Undervoltage Lockout | 8.8 V typical turn-on threshold - prevents erratic operation until VCC reaches sufficient level for reliable gate drive and logic. |
| Operating Temperature | -40 °C to +85 °C - specified for industrial environments; thermal impedance θJA = 90 °C/W in PLCC-20 package. |
| Package | 20-pin PLCC (N Suffix), lead-free - surface-mount compatible with standard reflow profiles; 9.78 mm × 9.78 mm footprint. |
Pinout & Package
SI9102DN02-E3 is housed in a 20-pin plastic leaded chip carrier (PLCC) package with gull-wing leads, measuring 9.78 mm × 9.78 mm and 4.20–4.57 mm height. Pin 1 is located at the corner adjacent to the index notch; pins 1, 4, 6, 13, 15, and 19 are no-connect (N/C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 2 (+VIN) | High-voltage input supply | Accepts 10–120 V DC; powers internal pre-regulator and bias circuits during startup and operation. |
| 3 (DRAIN) | Power switch drain node | Connects to primary winding of transformer; switches 200 V, 2 A peak current in flyback/forward configurations. |
| 5 (SOURCE) | Power switch source node | Serves as current-sense point for overcurrent protection; referenced to -VIN for accurate VSOURCE threshold detection. |
| 7 (VCC) | Bias supply rail | Internal pre-regulated output (9.4 V nominal); powers control circuitry; requires external bypass capacitor. |
| 10 (OSC OUT) | Oscillator output | Drives external ROSC resistor; forms RC timing network with OSC IN to set switching frequency. |
| 11 (OSC IN) | Oscillator input | Accepts timing signal from ROSC network; supports remote synchronization via capacitive coupling. |
| 12 (DISCHARGE) | Oscillator discharge control | Must be tied to -VIN for normal internal oscillator operation; enables frequency programming. |
| 14 (VREF) | Internal reference output | Provides 4.0 V reference for feedback loop; high output impedance allows external override if needed. |
| 16 (SHUTDOWN) | Logic-controlled disable input | Latched or unlatched shutdown depending on RESET state; internal pull-up enables floating operation. |
| 17 (RESET) | Latch control input | Determines latching behavior of SHUTDOWN; low + low sets latch; high releases latch. |
| 18 (COMP) | Error amplifier output | Drives external compensation network; connects to gate of external pass element in some configurations. |
| 20 (FB) | Error amplifier inverting input | Compares feedback voltage against VREF; sets regulation point for output voltage via resistive divider. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 200 V, 7 Ω DMOS switch | Eliminates need for external high-voltage MOSFET and driver, reducing BOM count and layout complexity in isolated 3 W converters. |
| Current-mode control architecture | Provides inherent cycle-by-cycle current limiting, improves transient response, and simplifies loop compensation versus voltage-mode designs. |
| Programmable 1 MHz oscillator | Enables frequency optimization for magnetic component size, EMI filtering, and efficiency trade-offs using a single external resistor. |
| Internal start-up current source | Delivers up to 20 mA from +VIN to charge VCC bypass cap-enables self-powered operation without auxiliary winding or external bias supply. |
| Latched/unlatched SHUTDOWN & RESET | Supports flexible system-level fault management: latched mode holds output off after fault until reset; unlatched allows momentary disable. |
Applications
| Telecom Double-Battery Supply | Industrial Isolated Sensor Power |
|---|---|
Use Scenario: Telecom equipment powered from dual -48 V battery banks requiring regulated ±5 V outputs with galvanic isolation. IC Role / Device Role / Timing Role: Primary-side controller in flyback topology; regulates output via optocoupler feedback to FB pin; provides precise 1 MHz switching timing. Use Value: Enables compact, self-starting design with no auxiliary winding-reduces transformer complexity while meeting -40 °C to +85 °C operating range. |
Use Scenario: Isolated 5 V/100 mA supply for analog sensor front-ends in factory automation systems with noisy 24–48 V DC bus. IC Role / Device Role / Timing Role: High-side switch controller driving transformer primary; uses current-mode sensing at SOURCE pin for robust overload protection. Use Value: Integrated 200 V switch withstands bus transients; UVLO prevents brownout-induced instability; PLCC-20 aids automated assembly. |
| Medical Auxiliary Power Module | Test Equipment DC-DC Converter |
Use Scenario: Low-power auxiliary supply in Class II medical devices needing reinforced isolation and <3 W output. IC Role / Device Role / Timing Role: Controller in forward converter configuration; COMP pin interfaces with secondary-side TL431 shunt regulator for tight voltage regulation. Use Value: Internal 4.0 V reference and ±15 mV offset ensure stable feedback; lead-free PLCC-20 meets RoHS compliance requirements. |
Use Scenario: Benchtop instrument requiring stable, low-noise 12 V/250 mA output from variable 12–36 V input. IC Role / Device Role / Timing Role: Regulator in discontinuous conduction mode flyback; ROSC sets 500 kHz switching to minimize audible noise and filter size. Use Value: Programmable oscillator and high-efficiency (>80%) operation reduce thermal load; SHUTDOWN pin enables remote power cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage switchmode regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC3803D-1 | Requires external 200 V MOSFET; 100 kHz fixed frequency; no integrated pre-regulator or start-up current source. | Needs auxiliary bias winding or external LDO; less suitable for ultra-low-component-count flyback designs. | Choose when higher peak current capability (>2 A) and discrete MOSFET selection flexibility are required. |
| NCP1014ST | 700 V integrated MOSFET; 65–100 kHz fixed frequency; lower max input (265 VAC rectified); no SHUTDOWN/RESET logic. | Designed for universal AC input; lacks digital control inputs and programmable oscillator; not rated for 120 V DC continuous operation. | Prefer for AC/DC offline SMPS; avoid for DC-input-only 120 V systems requiring latched fault handling. |
Compared with UCC3803D-1 and NCP1014ST, the SI9102DN02-E3 uniquely integrates a 200 V, 7 Ω switch with programmable 1 MHz oscillator, internal start-up current source, and dual logic-controlled shutdown/reset-making it optimal for compact, self-powered, DC-input isolated converters where component count and startup simplicity are critical.
Availability
SI9102DN02-E3 is available at Aetrix Electronics and suitable for telecom power supplies, industrial sensor modules, medical auxiliary power, test equipment DC-DC conversion, and isolated instrumentation requiring stable component supply despite end-of-life status.
Supply support for SI9102DN02-E3 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay Siliconix is a global semiconductor manufacturer specializing in discrete power MOSFETs, diodes, optoelectronics, and integrated power ICs with emphasis on high-reliability, high-voltage, and thermally efficient solutions.
The Si9102 product line was designed as a monolithic high-voltage switchmode regulator family targeting isolated DC-DC conversion up to 3 W in telecom, industrial, and medical applications-prioritizing integration, startup autonomy, and ruggedness in harsh input environments.
FAQ
What is the maximum input voltage rating for the SI9102DN02-E3?
The SI9102DN02-E3 has an absolute maximum +VIN rating of 120 V DC, with recommended operating range from 10 V to 120 V DC. This allows direct connection to telecom battery rails and industrial HV DC buses without external pre-regulation. Exceeding 120 V risks permanent damage per Absolute Maximum Ratings.
Does the SI9102DN02-E3 require an external MOSFET?
No, the SI9102DN02-E3 integrates a 200 V, 7 Ω lateral DMOS power switch. Its DRAIN and SOURCE pins connect directly to the transformer primary in flyback or forward topologies-eliminating the need for an external high-voltage MOSFET and associated gate driver circuitry.
How is the switching frequency set on the SI9102DN02-E3?
The SI9102DN02-E3 switching frequency is set by an external resistor (ROSC) connected between OSC OUT (Pin 10) and OSC IN (Pin 11). Frequency ranges from 40 kHz to 1 MHz depending on ROSC value (25 kΩ to 1 MΩ), as shown in Figure 5 of the datasheet. DISCHARGE (Pin 12) must be tied to -VIN for normal operation.
What is the function of the SHUTDOWN and RESET pins on the SI9102DN02-E3?
On the SI9102DN02-E3, SHUTDOWN and RESET provide logic-level control of the output switch. When both are low, the output is latched off; when RESET is high, SHUTDOWN becomes unlatched. Both pins feature internal pull-up current sources, allowing them to float when unused-enabling flexible system-level fault management without external biasing.
Is the SI9102DN02-E3 still in production?
No-the SI9102DN02-E3 is End of Life (EOL) with last available purchase date of December 31, 2014. However, Aetrix Electronics maintains legacy inventory and supports continued sourcing for existing designs through traceable, tested stock and lifecycle coordination services.
SI9102DN02-E3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Package/Case:
- 20-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive, Isolation Capable
- Topology:
- Flyback, Forward Converter
- Output Type:
- -
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 10V
- Voltage - Input (Max):
- 120V
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- 40kHz ~ 1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-PLCC (9x9)
SI9102DN02-E3 FAQ
1.How can I place an order for SI9102DN02-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI9102DN02-E3 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SI9102DN02-E3 reliable?
The price and inventory of SI9102DN02-E3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI9102DN02-E3 is usually 5 days.
3.What payment methods are accepted for SI9102DN02-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI9102DN02-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI9102DN02-E3?
SI9102DN02-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI9102DN02-E3 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SI9102DN02-E3?
For technical support, including SI9102DN02-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI9102DN02-E3 requirements.
6.How does Aetrix verify that SI9102DN02-E3 is sourced from the original manufacturer or authorized distributors?
All SI9102DN02-E3 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SI9102DN02-E3 meets industry standards.
7.What is the process for return or replacement of SI9102DN02-E3?
All SI9102DN02-E3 units undergo pre-shipment inspection (PSI). If there is an issue with SI9102DN02-E3, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SI9102DN02-E3 part is unused and in its original packaging.
Return procedure for SI9102DN02-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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