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Vishay Siliconix SI9113DY-T1-E3
- Part No.:
- SI9113DY-T1-E3
- Manufacturer:
- Vishay Siliconix
- Category:
- Special Purpose Regulators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI9113DY-T1-E3.pdf
- Description:
- IC REG CTRLR ISDN 1OUT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,066
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Product details
Overview
SI9113DY-T1-E3 from Vishay Siliconix is a high-voltage current-mode PWM controller IC designed for ISDN power supplies, featuring 23.5–200 V input range, 500 kHz max oscillator frequency, 50% max duty cycle, 1.3 V internal reference, and integrated start-up circuitry with programmable START/STOP thresholds. It implements single-switch flyback topology with built-in gate driver and Power_Good output.
For engineers reviewing the SI9113DY-T1-E3 datasheet, SI9113DY-T1-E3 pinout, SI9113DY-T1-E3 application, or SI9113DY-T1-E3 equivalent, key selection considerations include high-input-voltage capability (up to 200 V), depletion-mode MOSFET integration for direct bus powering, soft-start current (11 µA), fast over-current protection (0.6 V threshold), and industrial temperature range (−40 °C to +85 °C).
Technical Context
The SI9113DY-T1-E3 employs current-mode control architecture with a dedicated SENSE pin for cycle-by-cycle peak current limiting and a 1.3-MHz error amplifier bandwidth for fast transient response. Its oscillator frequency (30–500 kHz) is set by a single external resistor between OSCIN and OSCOUT pins, and includes capacitor-coupled external synchronization capability.
It integrates a 200-V depletion-mode MOSFET start-up circuit enabling direct operation from high-voltage DC bus without auxiliary winding or external bias supply. The START and STOP inputs allow user-programmable UVLO hysteresis via resistive dividers, with typical thresholds at 8.8 V for both turn-on and turn-off.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 23.5 V to 200 V - supports direct connection to ISDN line-derived DC bus without pre-regulator |
| Oscillator Frequency | 30 kHz to 500 kHz - externally resistor-programmable; enables optimization of transformer size and efficiency |
| Max Duty Cycle | 50% - limits switch conduction time per cycle to ensure stable operation in flyback topologies |
| Reference Voltage | 1.3 V ±25 mV - precision internal reference for FB comparator; decoupled with 0.1 µF capacitor |
| Soft-Start Current | 11 µA - constant-current source charges external SS capacitor for controlled output voltage ramp-up |
| Over-Current Threshold | 0.6 V - fast, fixed threshold on SENSE pin triggers immediate cycle termination for robust short-circuit protection |
| Operating Temperature | −40 °C to +85 °C - rated for industrial ambient conditions without derating |
| Supply Current (VIN <18 V) | <5 µA - ultra-low quiescent current during UVLO state minimizes standby losses |
Pinout & Package
SI9113DY-T1-E3 is housed in a 14-pin SOIC (Narrow) package with exposed thermal pad (Y suffix), measuring 8.75 mm × 4.00 mm × 1.75 mm (D × E × A), rated for 900 mW power dissipation at 25 °C with 140 °C/W junction-to-ambient thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (STOP) | UVLO stop threshold input | Resistive divider node setting turn-off voltage; hysteresis prevents oscillation near threshold |
| 2 (+VIN) | High-voltage input supply | Direct connection to 23.5–200 V DC bus; powers internal start-up circuit and UVLO comparators |
| 3 (SENSE) | Current sense amplifier input | Monitors primary-side current via sense resistor; triggers fast OCP at 0.6 V peak |
| 4 (PWR_GOOD) | Open-collector status output | Logic-high when FB and VCC are in regulation; sinks up to 2.5 mA; rise/fall times programmable with capacitor |
| 5 (−VIN) | Power ground reference | Common return for high-voltage input circuitry and internal bias networks |
| 6 (DRIVER) | MOSFET gate drive output | Capable of sourcing/sinking 200 mA peak at VCC = 12 V; drives low-side N-channel MOSFET directly |
| 7 (VCC) | Internal supply rail | Internally regulated ~9.0 V; can be overridden by external 10–14 V supply; disabled if VCC < 7.9 V |
| 8 (OSCIN) | Oscillator timing input | ROSC connection point; sets switching frequency with external resistor to OSCOUT |
| 9 (OSCOUT) | Oscillator timing output | ROSC connection point; square-wave output synchronized with internal clock |
| 10 (SS) | Soft-start timing input | Receives 11 µA constant current; external capacitor sets soft-start duration and output ramp rate |
| 11 (VREF) | 1.3 V reference output | Stable internal reference; requires 0.1 µF ceramic decoupling capacitor for noise immunity |
| 12 (FB) | Error amplifier inverting input | Compares output voltage feedback against VREF; sets regulation point for isolated secondary |
| 13 (COMP) | Error amplifier output | Provides compensation node for external RC network to stabilize loop dynamics |
| 14 (START) | UVLO start threshold input | Resistive divider node setting turn-on voltage; must be higher than STOP threshold per design |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 200-V depletion-mode start-up FET | Eliminates need for external high-voltage bias supply or auxiliary winding in flyback designs |
| Programmable START/STOP UVLO thresholds | Enables precise hysteresis control via external resistor dividers-supports wide input range operation |
| Capacitor-coupled external oscillator sync | Allows synchronization to system master clock without direct DC coupling or level-shifting circuitry |
| 0.6-V fast over-current protection | Sub-150 ns response time ensures immediate shutdown during fault events, protecting primary switch and transformer |
| 1.3-MHz error amplifier gain-bandwidth | Enables wide closed-loop bandwidth for fast load transient recovery in ISDN-powered systems |
| Power_Good open-collector output | Provides system-level power sequencing and fault indication with configurable rise/fall timing |
Applications
| ISDN Line-Powered Terminal | Dual-Output Flyback Converter |
|---|---|
Use Scenario: Powering ISDN terminal equipment (e.g., NT1, TA) directly from the 28–99 V DC line interface without local AC mains. IC Role / Device Role / Timing Role: Primary-side PWM controller implementing current-mode flyback regulation with programmable UVLO and soft-start. Use Value: Enables compact, self-contained power solution meeting ITU-T I.430/I.431 requirements with <2% output regulation and fast fault response. | Use Scenario: Generating isolated 3.3 V and 5 V outputs from a wide-range DC input in telecom infrastructure modules. IC Role / Device Role / Timing Role: High-voltage controller managing primary-side switching, current sensing, and output regulation via optocoupler feedback. Use Value: Delivers dual regulated outputs with tight cross-regulation using single transformer and minimal external components. |
| Industrial Telecom Power Module | Legacy ISDN Backup Supply |
Use Scenario: Providing reliable 3.3 V/5 V power in DIN-rail mounted industrial gateways requiring −40 °C to +85 °C operation. IC Role / Device Role / Timing Role: Core PWM controller with integrated start-up, thermal-stable reference, and robust OCP for harsh environments. Use Value: Ensures uninterrupted operation under wide temperature swings and input transients common in factory-floor deployments. | Use Scenario: Maintaining backup power to ISDN interfaces during AC mains failure in PBX or central office equipment. IC Role / Device Role / Timing Role: High-efficiency flyback controller operating from battery-backed DC bus (e.g., 48 V nominal, up to 200 V surge). Use Value: Supports extended hold-up time with low quiescent current (<5 µA in UVLO) and fast restart after brownout recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage current-mode PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UC3845BD1R2G | Requires external start-up circuit; 11 V max VIN; no integrated HV start-up FET; 500 kHz max fSW | Suitable only for lower-input-voltage flyback designs (≤25 V); needs auxiliary bias winding or separate supply | Select when cost sensitivity outweighs HV integration need and input stays below 25 V |
| UCC3803D | 200 V start-up capability but not depletion-mode; 1 MHz max fSW; 1.25 V reference; no PWR_GOOD output | Lacks programmable UVLO hysteresis and Power_Good signaling; less suited for ISDN-specific sequencing | Choose for higher-frequency designs where PWR_GOOD and precise UVLO are non-critical |
Compared with UC3845BD1R2G and UCC3803D, SI9113DY-T1-E3 uniquely combines 200-V direct-bus start-up, programmable UVLO hysteresis, and Power_Good output-making it the only option qualified for ISDN line-powered applications without auxiliary circuitry.
Availability
SI9113DY-T1-E3 is available at Aetrix Electronics and suitable for ISDN terminal power supplies, telecom infrastructure modules, industrial gateways, and legacy backup power systems requiring stable component supply across extended temperature and input voltage ranges.
Supply support for SI9113DY-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 power devices, analog ICs, and passive components, with leadership in high-voltage, high-reliability, and thermally optimized solutions.
The SI9113DY-T1-E3 belongs to Vishay's high-voltage PWM controller product line, engineered specifically for telecom power applications where direct line-powered operation, robust fault protection, and industrial temperature compliance are mandatory.
FAQ
What is the maximum input voltage rating for SI9113DY-T1-E3?
The SI9113DY-T1-E3 has an absolute maximum input voltage (VIN) rating of 220 V, with a recommended operating range of 23.5 V to 200 V. This allows direct connection to ISDN line-derived DC buses and accommodates transient surges up to 200 V during normal operation. Exceeding 220 V may cause permanent damage per the Absolute Maximum Ratings table in the datasheet.
Does SI9113DY-T1-E3 require an external start-up circuit?
No, SI9113DY-T1-E3 does not require an external start-up circuit. It integrates a 200-V depletion-mode MOSFET that enables direct powering from the high-voltage input bus (23.5–200 V). The internal start-up circuit activates when the START pin voltage exceeds 8.8 V (typical), eliminating the need for auxiliary windings or bias supplies commonly required by controllers like UC3845.
What is the function of the PWR_GOOD pin on SI9113DY-T1-E3?
The PWR_GOOD pin on SI9113DY-T1-E3 is an open-collector output that asserts logic high when both the FB voltage and VCC are within regulation. It provides system-level power sequencing and fault indication, with rise/fall times programmable via an external capacitor (e.g., 100 nF yields ~35 ms rise time). The pin can sink up to 2.5 mA and is used to enable downstream circuitry only after stable regulation is achieved.
Can SI9113DY-T1-E3 operate in pulse-skipping mode?
Yes, SI9113DY-T1-E3 automatically enters pulse-skipping mode when output load current drops near zero. This behavior is inherent to its current-mode PWM architecture and occurs naturally as the duty cycle approaches minimum limits-reducing switching losses and improving light-load efficiency without requiring external control. Pulse skipping is not user-configurable but is guaranteed functional across the full −40 °C to +85 °C range.
What is the soft-start mechanism used in SI9113DY-T1-E3?
SI9113DY-T1-E3 implements a constant-current soft-start: a precise 11 µA current source charges an external capacitor connected to the SS pin. The resulting linear voltage ramp controls the duty cycle ramp-up, ensuring monotonic output voltage rise without overshoot. Soft-start duration is fully determined by the SS capacitor value (e.g., 1 µF ≈ 91 ms), and the DRIVER output remains inhibited until SS reaches 3.3 V.
SI9113DY-T1-E3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Controller, ISDN Power Supplies
- Voltage - Input:
- 23.5V ~ 200V
- Number of Outputs:
- 1
- Voltage - Output:
- Adj to 1.3V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
SI9113DY-T1-E3 FAQ
1.How can I place an order for SI9113DY-T1-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI9113DY-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 SI9113DY-T1-E3 reliable?
The price and inventory of SI9113DY-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 SI9113DY-T1-E3 is usually 5 days.
3.What payment methods are accepted for SI9113DY-T1-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI9113DY-T1-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI9113DY-T1-E3?
SI9113DY-T1-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI9113DY-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 SI9113DY-T1-E3?
For technical support, including SI9113DY-T1-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI9113DY-T1-E3 requirements.
6.How does Aetrix verify that SI9113DY-T1-E3 is sourced from the original manufacturer or authorized distributors?
All SI9113DY-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 SI9113DY-T1-E3 meets industry standards.
7.What is the process for return or replacement of SI9113DY-T1-E3?
All SI9113DY-T1-E3 units undergo pre-shipment inspection (PSI). If there is an issue with SI9113DY-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 SI9113DY-T1-E3 part is unused and in its original packaging.
Return procedure for SI9113DY-T1-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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