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Texas Instruments TL783CKCE3
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- Part No.:
- TL783CKCE3
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-3
- Datasheet:
-
TL783CKCE3.pdf
- Description:
- IC REG LIN POS ADJ 700MA TO220-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,611
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Product details
Overview
TL783CKCE3 from Texas Instruments is a high-voltage adjustable linear regulator IC with DMOS output transistor, delivering 1.25 V to 125 V output via external resistor divider, 700-mA continuous output current, and full short-circuit, safe-operating-area (SOA), and thermal-shutdown protection - used in medical power supplies and industrial off-line regulators.
For engineers reviewing the TL783CKCE3 datasheet, TL783CKCE3 pinout, TL783CKCE3 application, or TL783CKCE3 equivalent, key selection criteria include input-to-output differential voltage up to 125 V, minimum load current requirement of 15 mA, ADJ pin reference voltage of 1.25 V, ripple rejection of 76 dB at 120 Hz, and TO-220 package thermal resistance of 19°C/W junction-to-ambient.
Technical Context
The TL783CKCE3 integrates bipolar control circuitry with a high-voltage DMOS pass transistor, enabling operation at input-to-output differentials up to 125 V without secondary breakdown - unlike standard bipolar regulators. Its error amplifier compares OUT–ADJ voltage against an internal 1.25-V reference to drive the DMOS output stage.
Protection is implemented via three independent circuits: foldback current limiting, SOA monitoring based on VI–VO and IO simultaneously, and thermal shutdown triggered at 150°C virtual junction temperature. The ADJ pin draws only 83–110 μA, minimizing programming error in high-R2 configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 1.25 V to 125 V - set by external R1/R2 divider; enables single-part coverage from low-voltage instrumentation to high-voltage industrial rails. |
| Max Output Current | 700 mA - sustained under VI–VO ≤25 V; derates to 100 mA at 125 V differential due to power dissipation limits. |
| Reference Voltage (OUT–ADJ) | 1.25 V (typ) - stable over temperature and line/load; forms basis for precise programmable output calculation VO ≈ 1.25 × (1 + R2/R1). |
| Ripple Rejection | 76 dB (typ) at 120 Hz - suppresses rectified AC noise without requiring ADJ bypass capacitor, simplifying layout. |
| Input Voltage Regulation | 0.001%/V (typ) - ensures <1.25 mV output change per 1-V input shift at 25°C, critical for unregulated DC bus applications. |
| Thermal Shutdown Threshold | 150°C junction temperature - protects against sustained overload or inadequate heatsinking in enclosed systems. |
| ESD Rating (HBM) | 2500 V - meets JEDEC JS-001; requires handling precautions but supports standard assembly lines with ESD controls. |
Pinout & Package
TL783CKCE3 is housed in a TO-220 (KC) package with 3 pins, 10.16 mm × 8.70 mm body size, and metal tab electrically connected to the OUT pin for direct heatsink mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 2) | Voltage Output / Power Return | Regulated output node; metal tab is internally tied to OUT - must be isolated from chassis ground unless output is referenced to system ground. |
| IN (Pin 3) | Supply Input | High-voltage DC input; supports up to 125 V differential vs OUT; requires ≥4-inch separation from filter cap unless bypassed with 1-μF tantalum. |
| ADJ (Pin 1) | Voltage Adjustment / Reference Sense | Senses 1.25 V below OUT; connects to R1–R2 divider junction; draws only 83–110 μA - enables high-impedance programming without loading error. |
Key Features
| Feature | Design Value |
|---|---|
| DMOS Pass Transistor | Enables 125-V input-to-output differential without secondary breakdown - eliminates need for external series pass devices in HV designs. |
| Integrated SOA Protection | Monitors simultaneous VI–VO and IO to prevent destructive operating points - allows safe transient overload beyond rated DC current. |
| No ADJ Bypass Required | Achieves 76-dB ripple rejection without capacitor on ADJ pin - avoids degraded transient response and simplifies bill-of-materials. |
| Low ADJ Pin Current | 83–110 μA typical - reduces R2-induced error in high-output-voltage configurations (e.g., VO = 100 V with R2 = 650 kΩ adds only ~68 mV error). |
| Minimum Load Current | 15 mA at VI–VO = 125 V - satisfied by standard 82-Ω R1; ensures regulation stability even with light or no external load. |
Applications
| Medical High-Voltage Bias Supply | Industrial Off-Line Regulator |
|---|---|
Use Scenario: Generating stable 50–100 V bias for photomultiplier tubes or X-ray detector front-ends in portable diagnostic equipment. IC Role / Device Role / Timing Role: Primary HV linear regulator; replaces discrete MOSFET+op-amp solutions with integrated SOA and thermal protection. Use Value: Eliminates external current-sense and shutdown logic; maintains regulation during brief load transients up to 700 mA without derating. |
Use Scenario: Providing regulated 48 V/200 mA output directly from rectified 90–125 VAC mains in factory automation I/O modules. IC Role / Device Role / Timing Role: Adjustable HV regulator in non-isolated buck-derived topology; operates with minimal external components. Use Value: Supports wide input range without transformer redesign; 0.001%/V line regulation ensures consistent sensor excitation across varying line conditions. |
| Electronic Point-of-Sale Printer Power | Test Equipment Auxiliary Rail |
Use Scenario: Delivering 24–36 V at 500 mA to thermal print head drivers and stepper motor controllers in retail kiosks. IC Role / Device Role / Timing Role: Main DC-DC post-regulator; interfaces with upstream switching converter and downstream motor loads. Use Value: Withstands 125-V surge transients from inductive kickback; built-in SOA protection prevents latch-up during print head stall events. |
Use Scenario: Creating user-programmable ±15 V to ±100 V auxiliary rails in automated test equipment for DUT biasing and calibration. IC Role / Device Role / Timing Role: Precision adjustable HV source; paired with digital potentiometer or DAC for remote voltage setting. Use Value: 0.15% output voltage regulation and 0.4% drift over 1000 hours enable traceable metrology-grade outputs without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage adjustable regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM317HVH | Max VI–VO = 60 V; 1.25–57 V output range; 500-mA max current; BJT-based, no SOA protection. | Limited to medium-HV applications (<60 V); lacks DMOS ruggedness for 100+ V transients or sustained 125-V operation. | Select when VI–VO ≤60 V and cost sensitivity outweighs SOA/thermal robustness needs. |
| LT1083CP | Max VI–VO = 125 V; 1.25–60 V output; 7.5-A peak current; BJT with external SOA compensation required. | Higher current capability but requires external sensing network for SOA; less integrated than TL783CKCE3's monolithic protection. | Choose for >700 mA DC loads where external SOA design resources are available and footprint permits larger package. |
Compared with LM317HVH and LT1083CP, TL783CKCE3 uniquely combines 125-V differential rating, monolithic SOA/thermal protection, and 76-dB ripple rejection in a TO-220 package - reducing component count and validation effort for true high-voltage linear regulation.
Availability
TL783CKCE3 is available at Aetrix Electronics and suitable for medical imaging bias supplies, industrial off-line regulators, and electronic point-of-sale printer power systems requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for TL783CKCE3 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-reliability power management ICs, with decades of expertise in high-voltage linear regulation and industrial-grade analog design.
The TL783 product line was developed specifically for high-input-voltage linear regulation in safety-critical and space-constrained applications where discrete HV solutions introduce complexity, reliability risk, and board area penalties.
FAQ
What is the maximum input-to-output voltage differential supported by the TL783CKCE3?
The TL783CKCE3 supports a maximum input-to-output differential voltage of 125 V, as specified in its Absolute Maximum Ratings. This allows it to regulate from unfiltered rectified AC inputs up to 125 V while maintaining full protection functionality - including SOA and thermal shutdown - without external components. Operation beyond this limit risks permanent damage.
Does the TL783CKCE3 require an output capacitor for stability?
The TL783CKCE3 is internally compensated and stable without an output capacitor. However, an output bypass capacitor is strongly recommended to improve load transient response and prevent dropout during large current steps. TI specifies a minimum value of Co (μF) = 15 / VO - for example, 300 μF for a 50-V output - using aluminum or tantalum electrolytic types.
What is the purpose of the ADJ pin on the TL783CKCE3, and how is it used?
The ADJ pin on the TL783CKCE3 senses the 1.25-V internal reference relative to the OUT pin. It is connected to the junction of two external resistors (R1 from OUT to ADJ, R2 from ADJ to ground) to program the output voltage as VO ≈ 1.25 × (1 + R2/R1). The ADJ pin draws only 83–110 μA, enabling high-resistance dividers without significant error.
Can the TL783CKCE3 be used in current-source or current-sink configurations?
Yes, the TL783CKCE3 can be configured as a precision current source by connecting the load between IN and OUT, with R1 from OUT to ADJ and R2 from ADJ to ground - yielding ILOAD ≈ 1.25 V / R1. It also supports current-sinking topologies using external op-amps, as shown in Figure 16 of the datasheet, leveraging its stable reference and high-voltage capability.
How does the TL783CKCE3 handle short-circuit conditions?
The TL783CKCE3 provides full short-circuit protection via integrated foldback current limiting and SOA circuitry. During output short, it limits current to ~100 mA at 125 V differential (per Figure 1), then activates thermal shutdown if sustained. Unlike basic current limiters, its SOA protection monitors both voltage and current simultaneously to prevent device destruction under fault conditions.
TL783CKCE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 125V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 125V
- Voltage Dropout (Max):
- -
- Current - Output:
- 700mA
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- 76dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
TL783CKCE3 FAQ
1.How can I place an order for TL783CKCE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL783CKCE3 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 TL783CKCE3 reliable?
The price and inventory of TL783CKCE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL783CKCE3 is usually 5 days.
3.What payment methods are accepted for TL783CKCE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL783CKCE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL783CKCE3?
TL783CKCE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL783CKCE3 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 TL783CKCE3?
For technical support, including TL783CKCE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL783CKCE3 requirements.
6.How does Aetrix verify that TL783CKCE3 is sourced from the original manufacturer or authorized distributors?
All TL783CKCE3 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 TL783CKCE3 meets industry standards.
7.What is the process for return or replacement of TL783CKCE3?
All TL783CKCE3 units undergo pre-shipment inspection (PSI). If there is an issue with TL783CKCE3, 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 TL783CKCE3 part is unused and in its original packaging.
Return procedure for TL783CKCE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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