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Texas Instruments LM2588T-12/NOPB
- Part No.:
- LM2588T-12/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-7 Formed Leads
- Datasheet:
-
LM2588T-12/NOPB.pdf
- Description:
- IC REG BST FLYBCK 12V 5A TO220-7
- Quantity:
- Payment:
- Shipping:
Inventory:3,990
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Product details
Overview
LM2588T-12/NOPB from Texas Instruments is a monolithic 5A flyback/boost switching regulator IC with fixed 12V output, integrated 5.0A NPN switch rated for 65V standoff, wide 4V–40V input range, adjustable 100–200 kHz switching frequency, and external shutdown capability. It delivers up to 1.2A load current in flyback configuration with ±4% system output voltage tolerance over line and load conditions, used in isolated DC-DC power supplies for industrial control systems.
For engineers reviewing the LM2588T-12/NOPB datasheet, LM2588T-12/NOPB pinout, LM2588T-12/NOPB application, or LM2588T-12/NOPB equivalent, key selection criteria include its 5A internal NPN switch voltage rating, thermal shutdown protection, current-mode control for transient response, soft-start function to limit in-rush current, and compatibility with standard flyback transformers such as Schott 67141450 and Renco RL-5530.
Technical Context
The LM2588T-12/NOPB implements current-mode PWM control with an internal error amplifier (transconductance = 0.328 mmho, gain = 70 V/V) referenced to a 12.0V internal feedback threshold. Its oscillator supports frequency adjustment via external resistor or synchronization to external clock signals.
Protection features include cycle-by-cycle current limiting, thermal shutdown, undervoltage lockout (3.30V threshold), and soft-start initiated by 11.0 μA internal current source. The device operates across −40°C to +125°C junction temperature and requires no external compensation for basic flyback designs using recommended transformers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12.0V ±4% over line/load/temperature - ensures stable rail for downstream logic or analog circuitry without external feedback resistors. |
| Switch Current Rating | 5.0A continuous, 6.5A peak - supports high-power flyback topologies delivering ≥1.2A at 12V with proper transformer selection. |
| Input Voltage Range | 4V to 40V - enables direct operation from 5V, 12V, 24V, or 36V industrial bus rails without pre-regulation. |
| Switching Frequency | Adjustable 100–200 kHz - balances efficiency vs. magnetics size; higher frequencies reduce transformer volume but increase switching losses. |
| Shutdown Current | <60 μA - enables ultra-low-power standby mode in battery-backed or energy-sensitive applications. |
| Thermal Resistance | θJA = 65°C/W (TO-220, minimal copper); 45°C/W (TO-220, 4 in² copper) - dictates heatsink requirements for 5A switching under full load. |
| Reference Voltage | 12.0V at FB pin - sets regulated output directly; eliminates need for resistor divider network required by adjustable versions. |
Pinout & Package
The LM2588T-12/NOPB uses a 7-pin TO-220 package (package number NDZ0007B), with vertical mounting and ½-inch leads soldered to PCB for thermal performance. Pins are arranged in bent configuration with exposed tab electrically connected to Pin 2 (Emitter).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Freq Adj / Sync) | Oscillator control input | Accepts resistor to ground for frequency setting (100–200 kHz) or external clock signal for synchronization. |
| Pin 2 (Emitter) | NPN switch emitter | Internally tied to exposed metal tab; must be connected to ground plane for thermal and electrical reference. |
| Pin 3 (Ground) | Analog ground reference | Separate low-noise ground return for error amplifier and feedback network; routed separately from power ground where possible. |
| Pin 4 (Feedback) | Voltage sense input | Monitors output via direct connection to 12V rail; internal 12.0V reference eliminates external resistor divider. |
| Pin 5 (Compensation) | Error amplifier output | Provides access to transconductance amplifier output for loop compensation with RC network. |
| Pin 6 (Switch) | NPN collector output | Drives primary winding of flyback transformer or boost inductor; rated for 65V standoff and 5A current. |
| Pin 7 (ON/OFF) | Enable/shutdown control | Logic-level input: <2.4V disables regulator, >1.6V enables; draws ≤65 μA when active. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5A NPN power switch | Eliminates need for external transistor and driver, reducing BOM count and layout complexity in flyback/boost converters. |
| Current-mode PWM control | Improves line and load transient response, enables inherent cycle-by-cycle current limiting, and simplifies loop compensation design. |
| Internal soft-start | Reduces in-rush current during startup by gradually ramping peak switch current, preventing input rail sag and output overshoot. |
| External frequency synchronization | Allows multiple LM2588T-12/NOPB units to operate at identical switching frequencies, minimizing beat frequencies and EMI interference. |
| Thermal shutdown & UVLO | Protects against overheating and brownout conditions; UVLO activates at 3.30V typical, ensuring reliable start-up only above minimum input threshold. |
Applications
| Industrial Flyback Power Supply | Automotive DC-DC Converter |
|---|---|
Use Scenario: Isolated 12V auxiliary supply in PLC backplane modules powered from 24V DC bus. IC Role / Device Role / Timing Role: Primary-side controller regulating isolated 12V output using Schott 67141450 transformer in flyback topology. Use Value: Delivers 1.2A at ±4% regulation with built-in current limiting and thermal protection, eliminating need for discrete protection circuitry. | Use Scenario: Boost converter generating stable 12V rail from variable 5–16V automotive battery input during cold-crank conditions. IC Role / Device Role / Timing Role: Step-up regulator driving Renco RL-5472-5 inductor to maintain 12V output during low-battery events. Use Value: Operates down to 4V input, sustaining regulated output without dropout; shutdown pin enables microcontroller-controlled power gating. |
| Telecom Line Card Supply | Test Equipment Auxiliary Rail |
Use Scenario: Dual-output flyback supplying +12V and −12V for op-amp biasing in modular telecom interface cards. IC Role / Device Role / Timing Role: Single-chip controller managing coupled inductor winding polarity and duty cycle to regulate both rails simultaneously. Use Value: Achieves tight cross-regulation between outputs using current-mode control and shared transformer core, reducing component count vs. dual-controller solutions. | Use Scenario: Bench-top test instrument requiring clean, isolated 12V supply for DUT powering with remote enable/disable capability. IC Role / Device Role / Timing Role: Flyback controller with ON/OFF pin interfaced to GPIB or USB host for programmable power sequencing. Use Value: Draws <60 μA in shutdown, enabling low-quiescent power state; soft-start prevents output voltage overshoot during automated test sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flyback/boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2588S-12/NOPB | Same electrical specs; uses TO-263 (KTW) surface-mount package instead of TO-220 (NDZ). | Requires rework of thermal pad layout and solder profile; better suited for automated SMT assembly and higher power density designs. | Select LM2588S-12/NOPB when board space is constrained and thermal management via PCB copper area is preferred over heatsink mounting. |
| UC3845BD1R2G | Controller-only IC (no integrated switch); requires external 5A NPN/MOSFET; fixed 250 kHz oscillator; no integrated soft-start or sync capability. | Suitable for custom high-efficiency designs where switch selection and layout optimization are critical; lacks integrated protection features of LM2588T-12/NOPB. | Choose UC3845BD1R2G only when full control over power stage selection, frequency, and protection architecture is required - not a drop-in replacement. |
Compared with LM2588S-12/NOPB, the LM2588T-12/NOPB offers identical regulation performance but requires through-hole assembly and heatsink integration; versus UC3845BD1R2G, it trades design flexibility for reduced component count, faster time-to-market, and built-in reliability features including thermal shutdown and soft-start.
Availability
LM2588T-12/NOPB is available at Aetrix Electronics and suitable for industrial automation, telecom infrastructure, and test equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM2588T-12/NOPB 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 and embedded processing technologies, with decades of expertise in power management IC design and manufacturing.
The LM2588 series belongs to TI's SIMPLE SWITCHER® portfolio, engineered specifically for cost-effective, easy-to-implement flyback, boost, and forward converter power supplies targeting industrial, automotive, and communications applications.
FAQ
What is the maximum output current achievable with LM2588T-12/NOPB in a flyback configuration?
The LM2588T-12/NOPB supports up to 1.2A output current in flyback topology under specified conditions (VIN = 4V–10V, TJ ≤ +125°C), as confirmed in the LM2588-12 Electrical Characteristics table. This assumes use of recommended transformers like Schott 67141450 and adequate thermal management per θJA = 45°C/W with 4 in² copper. Output current is internally limited in flyback mode but externally limited in boost mode.
Does LM2588T-12/NOPB require external feedback resistors to set the output voltage?
No, the LM2588T-12/NOPB has a fixed 12.0V output with internal feedback reference; the Feedback (Pin 4) connects directly to the output rail without external resistors. This differs from the LM2588-ADJ version, which requires a resistor divider to program VOUT. The fixed 12V version simplifies design and improves accuracy by eliminating resistor tolerance effects.
Can LM2588T-12/NOPB be synchronized to an external clock signal?
Yes, LM2588T-12/NOPB supports external synchronization via Pin 1 (Freq Adj/Sync). When an external clock signal with amplitude ≥0.75V and frequency matching the internal oscillator range (100–200 kHz) is applied, the device locks to that frequency. This feature enables noise reduction in multi-rail systems and avoids beat frequencies in stacked power supplies.
What thermal considerations apply to LM2588T-12/NOPB in TO-220 package?
LM2588T-12/NOPB in NDZ0007B (TO-220) package has θJA = 65°C/W with minimal copper and 45°C/W with 4 in² of 1 oz. copper. At 5A switch current and 12V output, power dissipation can exceed 2W; therefore, a heatsink or large thermal pad is essential. Thermal shutdown activates at 150°C junction temperature, and layout must tie Pin 2 (Emitter/Tab) directly to ground plane for optimal conduction cooling.
Is LM2588T-12/NOPB suitable for boost converter applications?
Yes, LM2588T-12/NOPB is explicitly validated for boost operation per TI's Figure 47 and "Typical Boost Regulator Applications." It generates regulated 12V output from inputs as low as 4V using an external inductor (e.g., Renco RL-5472-5) and diode. However, output current must be externally limited to 5A since internal current limiting applies only in flyback mode per datasheet Section Absolute Maximum Ratings Note 3.
LM2588T-12/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-220-7 Formed Leads
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Step-Up, Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Boost, Flyback, Forward Converter
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 12V
- Voltage - Output (Max):
- -
- Current - Output:
- 5A (Switch)
- Frequency - Switching:
- 100kHz ~ 200kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-7
LM2588T-12/NOPB FAQ
1.How can I place an order for LM2588T-12/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2588T-12/NOPB 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 LM2588T-12/NOPB reliable?
The price and inventory of LM2588T-12/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2588T-12/NOPB is usually 5 days.
3.What payment methods are accepted for LM2588T-12/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2588T-12/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2588T-12/NOPB?
LM2588T-12/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2588T-12/NOPB 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 LM2588T-12/NOPB?
For technical support, including LM2588T-12/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2588T-12/NOPB requirements.
6.How does Aetrix verify that LM2588T-12/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2588T-12/NOPB 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 LM2588T-12/NOPB meets industry standards.
7.What is the process for return or replacement of LM2588T-12/NOPB?
All LM2588T-12/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2588T-12/NOPB, 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 LM2588T-12/NOPB part is unused and in its original packaging.
Return procedure for LM2588T-12/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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