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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > AC DC Converters, Offline Switches

STMicroelectronics TSM006IDT

Name: TSM006IDT
Brand: STMicroelectronics
SKU: TSM006IDT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TSM006IDT

Manufacturer:: STMicroelectronics

Category:: AC DC Converters, Offline Switches

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: TSM006IDT.pdf

Description:: IC OFFLINE SWITCH 14SO

Quantity:: RFQ Add To RFQ list

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Inventory:1,679

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Product details

Overview

TSM006IDT from STMicroelectronics is a fixed-frequency current-mode PWM controller IC designed for offline and DC-DC power supplies, featuring 77% duty cycle limitation, 5 V reference output, thermal shutdown at 130°C, and burst mode operation under zero-load conditions. It drives external Power MOSFETs directly via its totem-pole output and integrates primary overcurrent protection in hiccup mode.

For engineers reviewing the TSM006IDT datasheet, TSM006IDT pinout, TSM006IDT application, or TSM006IDT equivalent, key selection criteria include oscillator frequency accuracy (63–73 kHz), soft-start charge current (10 µA typ.), slope compensation capability, internal leading-edge blanking (280 ns), and latched disable functionality with 2.65 V threshold.

Technical Context

The TSM006IDT implements current-mode control using a COMP pin that sets the current-sense comparator threshold as (V_COMP − 2×V_BE)/3, with internal R/2R attenuation. Its oscillator frequency is set by an external RT/CT network and modulated via FM pin (4.5 kHz jitter) to reduce EMI.

Burst mode activates when COMP voltage falls below 1.25 V (unconnected BL pin), forcing output off and signaling light-load status on BS pin; hiccup mode triggers at CS > 1.25 V, discharging SS capacitor slowly (1 µA discharge current) for ~400 ms off-time with 10% duty cycle.

Key Specifications

Parameter	Value and Actual Design Meaning
Oscillator Frequency	63–73 kHz typical range; sets switching frequency and maximum duty cycle via RT/CT network.
Output Drive Capability	1 A peak sink/source; enables direct gate drive of Power MOSFET without external buffer.
Voltage Reference	5.00 V ±10 mV; stable internal reference for feedback loop and external circuit biasing.
Current Sense Threshold	1.0 V max at CS pin; limits peak primary current to prevent transformer saturation or MOSFET failure.
Soft Start Charge Current	10 µA typical; controls ramp-up rate of PWM duty cycle to limit inrush current during startup.
Thermal Shutdown	130°C junction temperature; latched shutdown with hysteresis ensures stable recovery after cooling.
UVLO Thresholds	8.4 V (turn-on), 12.0 V (turn-off); prevents erratic operation during brown-out or cold-start conditions.

Pinout & Package

Package: SO-14 (Plastic MicroPackage), 8.55–8.75 mm × 5.8–6.2 mm body, 1.27 mm pitch, surface-mount.

Pin/Terminal	Circuit Role	Design Meaning
1 (RT/CT)	Oscillator timing node	Connects external resistor to VREF and capacitor to PGND to set frequency and max duty cycle.
2 (FM)	Frequency modulation input	Accepts external capacitor to inject 4.5 kHz jitter, reducing conducted/radiated EMI.
3 (CS)	Current sense input	Monitors primary-side current via shunt; triggers overcurrent shutdown if >1.25 V.
4 (BL)	Burst level threshold control	Configures COMP threshold (1.25 V/1.75 V) to enter/exit burst mode during light load.
5 (SS)	Soft start & hiccup timing	Capacitor to ground sets soft-start ramp time and hiccup off-time (1 µA discharge current).
6 (COMP)	Error amplifier output interface	Receives optocoupler signal; sets current-limit threshold as (V_COMP − 2×V_BE)/3.
7 (BS)	Burst status output	Open-drain signal indicating burst mode active; used to synchronize standby in multi-rail systems.
8 (CSLOPE)	Slope compensation output	Provides buffered RT/CT ramp signal to compensate subharmonic oscillation in DCM/CCM.
9 (PGND)	Power ground return	Low-impedance return path for OUT driver and internal power circuits; separate from signal ground.
10 (OUT)	Gate drive output	Totem-pole output capable of 1 A peak current; directly drives N-channel MOSFET gate.
11 (VIN)	Main supply input	8–20 V DC input; powers internal circuitry and enables UVLO monitoring.
12 (VREF)	5 V reference output	Stable 5 V source for optocoupler LED, error amplifier, and external biasing networks.
13 (REX)	External current reference	Resistor to ground sets internal current source for precise slope compensation scaling.
14 (DIS)	Latched disable input	Logic-high (>2.65 V) forces permanent shutdown until VIN drops below UVLO threshold.

Key Features

Feature	Design Value
Automatic burst mode	Reduces switching activity at light load via COMP voltage monitoring, lowering no-load power dissipation.
Internal leading-edge blanking	280 ns delay masks current-sense noise during MOSFET turn-on, preventing false overcurrent trips.
Programmable soft start	10 µA charge current and 1 µA hiccup discharge current enable precise control of startup ramp and fault recovery timing.
Frequency modulation for low EMI	4.5 kHz FM dither spreads spectral energy, reducing peak emissions without altering average switching frequency.
77% duty cycle limitation	Hardware-enforced max on-time prevents transformer core saturation and ensures safe operation in flyback topologies.

Applications

AC/DC Adapter

Industrial SMPS

Use Scenario: Compact wall-mounted AC/DC adapter delivering 5–12 V at up to 3 A for consumer electronics.

IC Role / Device Role / Timing Role: Primary-side PWM controller implementing current-mode regulation, burst mode for <100 mW no-load, and hiccup protection against short-circuit.

Use Value: Enables high-efficiency, low-standby-power design meeting Energy Star Level VI requirements with minimal external components.

Use Scenario: 24 V input industrial power supply powering PLC I/O modules with wide ambient temperature range (0–105°C).

IC Role / Device Role / Timing Role: Fixed-frequency current-mode controller providing robust overcurrent and thermal protection in harsh environments.

Use Value: 130°C thermal shutdown and 2 kV ESD rating ensure reliability in factory-floor applications with electrical noise and temperature cycling.

USB-C PD Auxiliary Supply

LED Driver Power Stage

Use Scenario: Auxiliary 5 V/1 A supply inside USB-C PD controllers to power microcontrollers and communication interfaces.

IC Role / Device Role / Timing Role: Secondary-side isolated controller managing low-power auxiliary rail with precise 5 V reference and soft-start sequencing.

Use Value: Integrated 5 V reference eliminates need for external LDO; SS pin enables synchronized startup with main PD controller.

Use Scenario: Constant-current LED driver for architectural lighting with dimming interface and overtemperature protection.

IC Role / Device Role / Timing Role: Primary-side controller regulating LED current via secondary-side feedback, using burst mode for 10–100% dimming range.

Use Value: Burst mode enables smooth low-level dimming without audible noise; hiccup mode protects against open-circuit LED string failure.

Equivalent & Alternatives

The following parts are listed as comparable options for similar current-mode PWM controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
UC3844BD1R2G	Fixed 250 kHz oscillator, no burst mode, no FM, 1 A output drive, 2.5 V reference.	Lacks zero-load efficiency optimization; requires external soft-start and slope compensation.	Preferred where higher fixed frequency simplifies EMI filter design and light-load efficiency is secondary.
KA3845A	52–150 kHz adjustable oscillator, no integrated FM, 1 A output, 5 V reference, no hiccup mode.	Supports wider frequency range but lacks thermal shutdown and latched disable; hiccup replaced by foldback.	Chosen when programmable frequency and basic protection suffice, and thermal margin is managed externally.

Compared with UC3844BD1R2G and KA3845A, the TSM006IDT delivers superior light-load efficiency via automatic burst mode, lower EMI through built-in frequency modulation, and enhanced system safety with thermal shutdown and latched disable - all in a single SO-14 package.

Availability

TSM006IDT is available at Aetrix Electronics and suitable for AC/DC adapters, industrial SMPS, and LED driver power stages requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for TSM006IDT 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in power management, analog, microcontrollers, and automotive ICs.

The TSM006IDT belongs to ST's legacy AC-DC controller product line, engineered specifically for cost-sensitive, high-reliability offline power conversion in consumer and industrial applications.

FAQ

What is the purpose of the CSLOPE pin on the TSM006IDT?

The CSLOPE pin outputs a buffered version of the RT/CT ramp signal to provide external slope compensation. This compensates for subharmonic oscillation in continuous conduction mode (CCM) flyback converters. It must be connected to the current-sense amplifier's compensation node via a resistor to match the required slope ratio, typically 50–100% of the down-slope.

How does the latched disable function operate on the DIS pin?

The DIS pin enters latched disable when voltage exceeds 2.65 V. Once triggered, the device remains disabled until VIN drops below the UVLO bottom threshold (~8.4 V), resetting internal latches. This prevents accidental re-enablement during fault conditions and supports system-level safety interlocks without requiring continuous DIS pin assertion.

Can the TSM006IDT be used in a forward converter topology?

Yes - the TSM006IDT supports forward converters via its current-mode architecture and 77% duty cycle limit. However, external slope compensation (via CSLOPE) and careful RT/CT selection are required to maintain stability at duty cycles above 50%. The integrated hiccup mode also provides robust short-circuit protection for forward transformer windings.

What is the role of the BS (Burst Status) pin in system-level design?

The BS pin is an open-drain output that goes low during burst mode, signaling light-load condition. It can drive the EN pin of auxiliary regulators or put microcontrollers into deep sleep, enabling coordinated system-level power savings. Its logic state directly reflects COMP voltage relative to BL-configured thresholds (1.25 V/1.75 V), making it deterministic for firmware polling or hardware gating.

TSM006IDT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Output Isolation:: Non-Isolated

Internal Switch(s):: -

Voltage - Breakdown:: -

Topology:: -

Voltage - Start Up:: 12 V

Voltage - Supply (Vcc/Vdd):: 8V ~ 20V

Duty Cycle:: 77.5%

Frequency - Switching:: 73kHz

Power (Watts):: -

Fault Protection:: Current Limiting, Over Temperature

Control Features:: Frequency Control, Soft Start

Operating Temperature:: 0°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Supplier Device Package:: 14-SO

Mounting Type:: Surface Mount

TSM006IDT FAQ

1.How can I place an order for TSM006IDT through Aetrix?

Please submit a Request for Quotation (RFQ) for TSM006IDT 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 TSM006IDT reliable?

The price and inventory of TSM006IDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSM006IDT is usually 5 days.

3.What payment methods are accepted for TSM006IDT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSM006IDT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TSM006IDT?

TSM006IDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TSM006IDT 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 TSM006IDT?

For technical support, including TSM006IDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSM006IDT requirements.

6.How does Aetrix verify that TSM006IDT is sourced from the original manufacturer or authorized distributors?

All TSM006IDT 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 TSM006IDT meets industry standards.

7.What is the process for return or replacement of TSM006IDT?

All TSM006IDT units undergo pre-shipment inspection (PSI). If there is an issue with TSM006IDT, 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 TSM006IDT part is unused and in its original packaging.

Return procedure for TSM006IDT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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