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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > DC DC Switching Controllers

STMicroelectronics TSM007ID

Name: TSM007ID
Brand: STMicroelectronics
SKU: TSM007ID
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TSM007ID

Manufacturer:: STMicroelectronics

Category:: DC DC Switching Controllers

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: TSM007ID.pdf

Description:: IC REG CTRLR 8SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:1,711

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Product details

Overview

TSM007ID from STMicroelectronics is a fixed-frequency current-mode PWM controller IC designed for offline and DC-DC power supplies, featuring internal UVLO (7.9 V turn-on / 7.3 V turn-off), programmable soft start (10 µA source current), 2 kV ESD protection, and a totem-pole output capable of 1 A peak drive for direct MOSFET gate control. It operates from 12–25 V supply and targets PC SMPS applications.

For engineers reviewing the TSM007ID datasheet, TSM007ID pinout, TSM007ID application, or TSM007ID equivalent, key selection criteria include oscillator frequency stability (±0.5% over input voltage), brown-out threshold (2.50 V ±0.08 V), current-sense gain (3.00 V/V), soft-start timing control, and SO-8 package compatibility with PCB layout constraints.

Technical Context

The TSM007ID implements current-mode control using a COMP pin that sets the current-sense comparator threshold as (V_COMP − 2×V_BE)/3, with leading-edge blanking (280 ns) to suppress switching noise. Its oscillator uses CT pin charge/discharge currents (400 µA/600 µA) and a 1.6 V amplitude swing to set frequency (100 kHz typ. with 1.5 nF).

Brown-out detection disables all bias circuits when BRNOUT falls below 2.5 V, forcing standby mode with 350 µA supply current; recovery requires V_BRNOUT > 2.5 V, followed by V_REF enable and soft-start initiation. Internal 5 V reference (400 µA sink capability) feeds error amplifier and status logic.

Key Specifications

Parameter	Value and Actual Design Meaning
Oscillator Frequency	100 kHz typical (84–116 kHz range); sets primary switching period in SMPS designs
UVLO Threshold	7.9 V turn-on / 7.3 V turn-off (1.6 V hysteresis); prevents erratic startup during low-line conditions
Current Sense Gain	3.00 V/V (2.85–3.15 V/V); converts CS pin voltage to precise current threshold for cycle-by-cycle limiting
Soft Start Current	10 µA source (8–12 µA); linearly charges external capacitor to ramp duty cycle from 0% to full
Output Drive Capability	1 A peak sink/source (200 mA continuous); directly drives power MOSFET gates without buffer stage
Brown-Out Threshold	2.50 V ±0.08 V; disables IC when bulk voltage drops below safe operating level (e.g., <200 V)
ESD Protection	2 kV HBM; protects CT, SS, CS, and COMP pins during handling and board assembly

Pinout & Package

Package: SO-8 (Plastic Small Outline, 150 mil width), compliant with JEDEC MS-012, 1.27 mm pitch.

Pin/Terminal	Circuit Role	Design Meaning
1 - COMP	Analog input	Sets current-sense comparator reference; connected to optocoupler collector for feedback loop compensation
2 - BRNOUT	Analog input	Monitors bulk voltage via resistor divider; triggers full shutdown if <2.5 V
3 - CS	Analog input	Receives primary-side current sense signal; stops PWM if voltage exceeds 1.0 V
4 - CT	Timing capacitor	Sets oscillator frequency via external capacitor (1.5 nF typical for 100 kHz)
5 - GND	Power supply	Signal ground reference for all analog and digital blocks; must be low-impedance
6 - OUT	Analog output	Totem-pole driver output; directly interfaces MOSFET gate with 1 A peak current
7 - VIN	Power supply	Primary supply input (12–25 V); powers internal regulators and UVLO circuitry
8 - SS	Timing capacitor	Soft-start timing node; charged by 10 µA current to control startup duty ramp

Key Features

Feature	Design Value
Integrated UVLO with hysteresis	7.9 V turn-on / 7.3 V turn-off ensures clean startup and avoids oscillation near threshold
Programmable soft start	10 µA constant-current source enables predictable, adjustable startup time via external capacitor
High-current totem-pole output	1 A peak drive eliminates need for external gate driver in ≤100 W SMPS designs
Current-mode control architecture	Includes leading-edge blanking (280 ns) and precise CS gain (3.00 V/V) for stable loop response
Brown-out protection	Dual-action shutdown: disables V_REF, resets latches, and forces OUT low when bulk voltage collapses

Applications

Desktop PC SMPS

LCD Monitor Power Supply

Use Scenario: 200–250 W AC-DC power supply for desktop motherboards with PFC front-end and main +12 V rail.

IC Role / Device Role / Timing Role: Primary-side PWM controller regulating transformer duty cycle via current-mode feedback and UVLO monitoring.

Use Value: Enables reliable cold-start under low-line (90 VAC) conditions and prevents MOSFET overcurrent during transient load steps.

Use Scenario: Compact 30–65 W flyback converter powering LCD panel backlight and logic rails.

IC Role / Device Role / Timing Role: Fixed-frequency current-mode controller managing isolated output regulation and brown-out response.

Use Value: Soft start prevents inrush into output capacitors; BRNOUT pin disables operation before bulk capacitor discharge causes instability.

Industrial AC-DC Adapter

Embedded System Power Module

Use Scenario: DIN-rail mounted 48 V input to +5 V/+12 V dual-output power module for PLC I/O modules.

IC Role / Device Role / Timing Role: Primary-side controller implementing current-mode regulation with wide input voltage tolerance (12–25 V).

Use Value: 2 kV ESD rating improves robustness during field servicing; SO-8 package supports automated SMT assembly.

Use Scenario: Board-mounted 12 V to 3.3 V/5 V DC-DC converter in network edge device with thermal and space constraints.

IC Role / Device Role / Timing Role: Standalone PWM controller driving discrete MOSFETs in synchronous buck topology.

Use Value: Low standby current (350 µA) reduces no-load losses; COMP pin allows tight regulation via optocoupler feedback.

Equivalent & Alternatives

The following parts are listed as comparable options for similar primary-side PWM controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
UC3842BD1R2G (ON Semiconductor)	Fixed 52 kHz oscillator; no integrated brown-out; requires external UVLO and soft-start components	Lacks BRNOUT and SS pins; needs discrete circuitry for bulk voltage monitoring and startup ramp	Preferred where cost sensitivity outweighs integration benefits and board space permits added passives
TL494CN (Texas Instruments)	Double-ended PWM with 5 V reference; no current-mode sensing; requires external current sense amplifier	Designed for push-pull or half-bridge topologies; not optimized for single-switch flyback or forward converters	Chosen for legacy industrial designs requiring dual-output control and fixed-voltage reference sharing

Compared with UC3842BD1R2G and TL494CN, the TSM007ID delivers higher integration-eliminating six external components for brown-out, soft-start, and UVLO-while maintaining 100 kHz switching and 1 A gate drive, making it optimal for compact, cost-sensitive PC SMPS designs.

Availability

TSM007ID is available at Aetrix Electronics and suitable for desktop PC SMPS, LCD monitor power supplies, and industrial AC-DC adapters requiring stable component supply and long-term lifecycle support.

Supply support for TSM007ID 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 TSM007ID belongs to ST's legacy power controller product line, engineered specifically for cost-effective, high-reliability offline SMPS in computing and consumer electronics.

FAQ

What is the minimum recommended CT capacitor value for stable 100 kHz operation?

The TSM007ID achieves 100 kHz nominal frequency with a 1.5 nF capacitor on the CT pin, per design equations in the datasheet. Using values below 1.2 nF may cause frequency drift beyond ±2% due to process variation in internal charge/discharge currents (400 µA/600 µA). For production designs, 1.5 nF ±5% NP0/C0G ceramic is validated.

Can the BRNOUT pin be left unconnected if brown-out protection is not required?

No. The BRNOUT pin must be tied to a valid voltage divider from the bulk capacitor or pulled to GND via a 100 kΩ resistor. Leaving it floating risks false triggering of standby mode due to leakage or noise, causing intermittent shutdown. ST specifies 2.5 V threshold with 50 µA source current, requiring defined bias.

Does the TSM007ID support synchronous rectification?

No. The TSM007ID is a primary-side controller only and does not provide secondary-side gate drive signals or timing synchronization for synchronous rectifiers. It lacks dedicated SR control outputs, dead-time logic, or adaptive timing features required for synchronous FET control in flyback or LLC topologies.

What is the maximum allowable voltage on the CS pin during normal operation?

The absolute maximum CS pin voltage is 6.3 V, but functional operation limits it to ≤1.0 V. Exceeding 1.0 V triggers immediate PWM shutdown via the current-sense latch. This 1.0 V threshold is fixed and non-adjustable, corresponding to the internal comparator trip point referenced to COMP voltage.

TSM007ID Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Obsolete

Output Type:: Transistor Driver

Function:: -

Output Configuration:: Positive, Isolation Capable

Topology:: -

Number of Outputs:: 1

Output Phases:: 1

Voltage - Supply (Vcc/Vdd):: 12V ~ 25V

Frequency - Switching:: 100kHz

Duty Cycle (Max):: 60%

Synchronous Rectifier:: No

Clock Sync:: No

Serial Interfaces:: -

Control Features:: Frequency Control, Soft Start

Operating Temperature:: 0°C ~ 95°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

TSM007ID FAQ

1.How can I place an order for TSM007ID through Aetrix?

Please submit a Request for Quotation (RFQ) for TSM007ID 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 TSM007ID reliable?

The price and inventory of TSM007ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSM007ID is usually 5 days.

3.What payment methods are accepted for TSM007ID?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSM007ID transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TSM007ID?

TSM007ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TSM007ID 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 TSM007ID?

For technical support, including TSM007ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSM007ID requirements.

6.How does Aetrix verify that TSM007ID is sourced from the original manufacturer or authorized distributors?

All TSM007ID 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 TSM007ID meets industry standards.

7.What is the process for return or replacement of TSM007ID?

All TSM007ID units undergo pre-shipment inspection (PSI). If there is an issue with TSM007ID, 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 TSM007ID part is unused and in its original packaging.

Return procedure for TSM007ID:

1.Submit a request within 90 days.

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

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