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Vishay Siliconix SI9102DN02-T1-E3
- Part No.:
- SI9102DN02-T1-E3
- Manufacturer:
- Vishay Siliconix
- Package:
- 20-LCC (J-Lead)
- Datasheet:
-
SI9102DN02-T1-E3.pdf
- Description:
- IC REG FLYBACK 20PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,836
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Product details
Overview
SI9102DN02-T1-E3 from Vishay Siliconix is a high-voltage, current-mode switchmode regulator IC integrating a 200 V, 7 Ω DMOS power switch, internal 1 MHz oscillator, and error amplifier for isolated flyback/forward DC-DC converters up to 3 W. It operates directly from 10–120 V unregulated input and delivers stable regulation in telecom power supplies.
For engineers reviewing the SI9102DN02-T1-E3 datasheet, SI9102DN02-T1-E3 pinout, SI9102DN02-T1-E3 application, or SI9102DN02-T1-E3 equivalent, key selection considerations include its integrated high-voltage MOSFET, undervoltage lockout (8.8 V), 4 V reference accuracy (±1%), shutdown/reset latching logic, and PLCC-20 package thermal performance (θJA = 90 °C/W).
Technical Context
The SI9102DN02-T1-E3 implements current-mode control using an internal oscillator (adjustable 40 kHz–1 MHz via ROSC), a 4 V precision reference with ±1% initial accuracy, and a high-gain error amplifier (AVOL = 60–80 dB, BW = 0.7–1 MHz) for tight output regulation. Its pre-regulator draws constant start-up current until VCC reaches 9.4 V, then transitions to regulated bias.
It features dual logic inputs-SHUTDOWN and RESET-with latching behavior defined by truth table: simultaneous low on both pins forces latched OFF state. The integrated 200 V DMOS switch includes intrinsic body-diode but isolates body contact from SOURCE, enabling robust operation in high-side configurations of single-ended topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 10–120 V DC - enables direct connection to rectified AC lines or telecom battery stacks without external pre-regulation. |
| Integrated MOSFET | 200 V VBR(DSS), 7 Ω rDS(on) - supports primary-side switching in flyback converters up to 3 W with minimal external components. |
| Oscillator Frequency | Adjustable 40 kHz–1 MHz via external ROSC resistor - allows optimization of transformer size, EMI, and efficiency trade-offs. |
| Reference Voltage | 4.00 V ±1% (25 °C), 0.5–1.0 mV/°C drift - provides precise feedback threshold for stable closed-loop regulation across industrial temperature range. |
| Undervoltage Lockout | 8.8 V (typical) with 0.6 V hysteresis - ensures reliable startup and prevents erratic switching during brownout or soft-start conditions. |
| Thermal Resistance | θJA = 90 °C/W (PLCC-20) - supports continuous 3 W operation at ambient ≤60 °C with standard PCB copper area. |
| Shutdown/Reset Logic | Latching behavior when both pins low - enables fail-safe system-level fault holdoff without external supervision circuitry. |
Pinout & Package
SI9102DN02-T1-E3 is housed in a 20-pin PLCC (Power IC) package (JEDEC MS-018AC), measuring 10.03 mm × 10.03 mm × 3.04 mm, with gull-wing leads and 1.27 mm pitch. Thermal pad is not present; power dissipation relies on leadframe conduction and PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 6, 13, 15, 19 | No Connect | Internally unconnected; must remain floating or grounded per layout best practice - no electrical function. |
| 2 (+VIN) | High-Voltage Input | Accepts 10–120 V unregulated DC; powers internal pre-regulator and bias network during startup. |
| 3 (DRAIN) | MOSFET Drain Terminal | Connects to primary winding of flyback/forward transformer; switches full input voltage at up to 2 A peak. |
| 5 (SOURCE) | MOSFET Source Terminal | Return path for switch current; referenced to -VIN; used for current-sense feedback in primary-side regulation schemes. |
| 7 (VCC) | Bias Supply Rail | Internal 9.4 V regulated supply; powers control circuitry; requires ≥10 µF bypass capacitor for stability. |
| 8 (OSC OUT) | Oscillator Output | Drives external ROSC resistor; frequency set jointly with OSC IN; open-drain CMOS output. |
| 11 (OSC IN) | Oscillator Input | Accepts external sync pulses or ROSC return; enables remote synchronization or frequency trimming. |
| 12 (DISCHARGE) | Oscillator Discharge Control | Must be tied to -VIN for internal oscillator operation; disconnecting enables external timing control. |
| 14 (VREF) | Reference Output | 4.00 V ±1% source; high-impedance (15–45 kΩ); can be overridden by external voltage for programmable regulation. |
| 16 (SHUTDOWN) | Logic-Controlled Disable | Active-low input; latched or unlatched depending on RESET state; internal pull-up current ~15 µA. |
| 17 (RESET) | Reset Latch Control | Active-low input; determines SHUTDOWN latching behavior; internal pull-up enables default normal operation. |
| 18 (COMP) | Error Amplifier Output | Compensation node for Type II/III networks; drives gate of external optocoupler transistor in isolated feedback loops. |
| 20 (FB) | Error Amplifier Inverting Input | Connected to secondary-side feedback divider; compares output voltage against internal 4 V reference. |
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 <3 W isolated supplies. |
| Current-Mode Control Architecture | Provides inherent cycle-by-cycle current limiting, improves transient response, and simplifies loop compensation vs. voltage-mode designs. |
| Programmable 40 kHz–1 MHz Oscillator | Enables EMI spread-spectrum tuning and transformer optimization - e.g., 100 kHz for cost-sensitive telecom adapters. |
| 4 V Reference with ±1% Accuracy | Supports ±2% output voltage tolerance in final design without post-production trimming, improving yield in volume production. |
| Latching SHUTDOWN/RESET Logic | Allows hardware-level fault holdoff (e.g., overtemperature or overvoltage) without microcontroller intervention or additional latch ICs. |
| Internal Start-Up Current Source | Delivers up to 15 mA constant current from +VIN to charge VCC capacitor - enables self-powered startup from high-voltage rails. |
Applications
| Telecom Power Supplies | Flyback DC-DC Converters |
|---|---|
|
Use Scenario: Dual-output (±5 V) power for legacy telecom line cards operating from -48 V or -96 V battery banks. IC Role / Device Role / Timing Role: Primary-side controller and high-voltage switch in discontinuous conduction mode (DCM) flyback topology. Use Value: Enables compact, low-component-count isolated supply meeting Telcordia GR-1089 immunity requirements without external HV FET. |
Use Scenario: Low-power auxiliary supply for industrial PLC I/O modules requiring 5 V/100 mA from 24–48 V DC bus. IC Role / Device Role / Timing Role: Self-oscillating current-mode controller regulating output via optocoupler feedback to FB pin. Use Value: Reduces bill-of-materials by integrating switch, oscillator, and reference - cuts PCB area by >35% vs. discrete controller+FET solution. |
| Industrial Sensor Transmitters | Medical Isolated Bias Supplies |
|
Use Scenario: 4–20 mA loop-powered sensor with isolated analog front-end requiring 3.3 V/50 mA from loop voltage (12–36 V). IC Role / Device Role / Timing Role: High-side switch controller in forward converter configuration with auxiliary winding bias. Use Value: Supports wide input range and maintains regulation down to 10 V input - critical for low-voltage loop operation during brownouts. |
Use Scenario: Patient-isolated auxiliary supply for ultrasound probe electronics requiring 5 V/200 mA with 4 kV reinforced isolation. IC Role / Device Role / Timing Role: Primary-side controller in transformer-coupled flyback delivering isolated output with creepage/clearance compliance. Use Value: Integrated 200 V switch eliminates external HV gate driver, reducing common-mode noise and easing EN 60601-1 creepage validation. |
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 |
|---|---|---|---|
| UCC38C42DR | 80 V max input, external MOSFET required, no integrated HV switch; 1 MHz fixed oscillator; SOIC-8 package. | Suitable only for ≤60 V input systems; demands external 200 V FET and driver, increasing layout complexity and component count. | Choose UCC38C42DR only if lower input voltage and SOIC footprint are mandatory - not a drop-in replacement for SI9102DN02-T1-E3. |
| ICE2A265 | 700 V avalanche-rated switch, 1.25 A peak, 65 kHz fixed frequency, DIP-8 package; lacks programmable oscillator and latching logic. | Targeted at universal-input offline SMPS (>100 VAC); higher voltage rating trades off efficiency and thermal performance at 48–120 V DC inputs. | Select ICE2A265 for AC/DC applications with surge immunity needs; SI9102DN02-T1-E3 remains superior for clean, regulated HV DC inputs. |
Compared with UCC38C42DR and ICE2A265, SI9102DN02-T1-E3 uniquely combines 120 V input capability, integrated 200 V switch, programmable frequency, and latching fault logic in a single PLCC-20 package - optimizing size, reliability, and design simplicity for dedicated HV DC-DC conversion.
Availability
SI9102DN02-T1-E3 is available at Aetrix Electronics and suitable for telecom power supplies, industrial sensor transmitters, medical isolated bias supplies, and flyback DC-DC converters requiring stable component supply despite end-of-life status.
Supply support for SI9102DN02-T1-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 semiconductors, power ICs, and passive components, with emphasis on high-reliability, high-voltage, and thermally optimized solutions.
The Si9102 product line was designed specifically for high-efficiency, low-component-count isolated DC-DC conversion in telecom, industrial, and medical equipment operating from 10–120 V unregulated DC sources.
FAQ
What is the maximum input voltage rating for SI9102DN02-T1-E3?
The SI9102DN02-T1-E3 has an absolute maximum +VIN rating of 120 V DC, with recommended operating range from 10 V to 120 V. This allows direct interface with telecom battery banks (-48 V or -96 V referenced) and industrial HV DC buses without external pre-regulation. Exceeding 120 V risks permanent damage per Absolute Maximum Ratings.
Does SI9102DN02-T1-E3 require an external MOSFET?
No, SI9102DN02-T1-E3 integrates a 200 V, 7 Ω lateral DMOS power switch - eliminating the need for any external high-voltage MOSFET. The DRAIN and SOURCE pins connect directly to the transformer primary, making it a complete controller+switch solution for ≤3 W isolated converters.
How does the SHUTDOWN and RESET logic behave in SI9102DN02-T1-E3?
In SI9102DN02-T1-E3, SHUTDOWN and RESET operate as interlocked logic inputs: when both are low, the output switch enters latched OFF state and remains off until RESET returns high. This behavior is confirmed in the Truth Table (Document 70001, p.6) and enables hardware-level fault holdoff without software intervention.
What package type is used for SI9102DN02-T1-E3?
SI9102DN02-T1-E3 uses a 20-pin PLCC (Plastic Leaded Chip Carrier) package per JEDEC MS-018AC, with dimensions 10.03 mm × 10.03 mm × 3.04 mm and 1.27 mm lead pitch. It is lead (Pb)-free and RoHS-compliant, designated by the "-E3" suffix in the part number.
Is SI9102DN02-T1-E3 still in active production?
No - SI9102DN02-T1-E3 is End of Life (EOL), with last available purchase date of 31-Dec-2014 per Vishay documentation (S-70497-Rev. H). However, Aetrix Electronics maintains verified, traceable inventory with full lot traceability and extended lifecycle support for legacy design continuity.
SI9102DN02-T1-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-T1-E3 FAQ
1.How can I place an order for SI9102DN02-T1-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI9102DN02-T1-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-T1-E3 reliable?
The price and inventory of SI9102DN02-T1-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-T1-E3 is usually 5 days.
3.What payment methods are accepted for SI9102DN02-T1-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI9102DN02-T1-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI9102DN02-T1-E3?
SI9102DN02-T1-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI9102DN02-T1-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-T1-E3?
For technical support, including SI9102DN02-T1-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI9102DN02-T1-E3 requirements.
6.How does Aetrix verify that SI9102DN02-T1-E3 is sourced from the original manufacturer or authorized distributors?
All SI9102DN02-T1-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-T1-E3 meets industry standards.
7.What is the process for return or replacement of SI9102DN02-T1-E3?
All SI9102DN02-T1-E3 units undergo pre-shipment inspection (PSI). If there is an issue with SI9102DN02-T1-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-T1-E3 part is unused and in its original packaging.
Return procedure for SI9102DN02-T1-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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