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

Diodes Incorporated AP3102MTR-G1

Name: AP3102MTR-G1
Brand: Diodes Incorporated
SKU: AP3102MTR-G1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP3102MTR-G1

Manufacturer:: Diodes Incorporated

Category:: DC DC Switching Controllers

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

Datasheet:: AP3102MTR-G1.pdf

Description:: IC PWM CONTROLLER SO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP3102MTR-G1 from Diodes Incorporated is a green-mode PWM controller IC for off-line AC-DC power supplies, featuring current-mode control, programmable 65 kHz switching frequency (±3% voltage stability), 5 μA typical start-up current, and integrated brownout, OVP, OTP, OLP, and latch/auto-recoverable protection modes. It targets LCD monitor/TV power and open-frame SMPS designs requiring low standby loss and EMI-compliant operation.

For engineers reviewing the AP3102MTR-G1 datasheet, AP3102MTR-G1 pinout, AP3102MTR-G1 application, or AP3102MTR-G1 equivalent, key selection criteria include skip-mode frequency (~22–25 kHz), 500 mA gate drive capability, SO-8 package thermal resistance (186 °C/W), and configurable protection logic across AP3102/V/L variants.

Technical Context

The AP3102MTR-G1 implements current-mode PWM control with internal slope compensation to ensure stability at duty cycles >50%, and uses an external resistor on the RI pin to set oscillator frequency via a constant-current charging scheme (f_OSC ≈ 1720/R_RI kHz). Its BOK pin provides dual-function line-voltage feedforward for both brownout detection (0.5 V threshold) and line-compensated over-load protection.

Green mode operation is triggered by FB pin voltage decay, reducing switching frequency under light load and entering skip mode below ~25 kHz to suppress audible noise and minimize core/switching losses. The ADJ pin enables adjustable skip-cycle threshold (4.5 V typical latch trigger) and supports system-level latch protection independent of VCC OVP or OLP events.

Key Specifications

Parameter	Value and Actual Design Meaning
Start-up Current	5 μA typical - enables use of high-value start-up resistors to minimize power loss in high-input-voltage AC-DC adapters.
Switching Frequency	65 kHz ±3% (VCC-stable) - programmable via RI pin resistor; optimized for EMI compliance and transformer size trade-offs.
Skip Mode Frequency	22–25 kHz - avoids audible noise while maintaining <100 mW standby power in no-load conditions.
Gate Drive Current	500 mA sink/source - directly drives MOSFET gates without external buffer, supporting 7N60-class devices.
VCC UVLO Threshold	16.2 V turn-on / 8.8 V turn-off - ensures reliable startup from bulk capacitor and graceful shutdown during brownout.
SENSE Pin Voltage Limit	0.8 V typical - sets peak primary current limit; compensated by BOK voltage to maintain constant output power across line variations.
Thermal Shutdown	155 °C with 25 °C hysteresis - prevents thermal runaway in enclosed power supplies without external thermistors.

Pinout & Package

AP3102MTR-G1 is housed in a standard SO-8 (Small Outline-8) package with 1.27 mm pitch, 6.2 mm × 5.1 mm body, and 186 °C/W junction-to-ambient thermal resistance. Pin 1 is marked with a dot or notch; top-view orientation follows JEDEC MS-012.

Pin/Terminal	Circuit Role	Design Meaning
1 GND	Signal ground reference	Return path for control logic, driver stage, and internal bias; must be low-impedance connection to power ground plane.
2 FB	Feedback input	Directly interfaces opto-coupler cathode; voltage >4.2 V for 35 ms triggers hiccup-mode OLP protection.
3 BOK	Brownout & line OVP	Dual-function pin: <0.5 V = brownout shutdown; >4 V = line OVP; also feeds forward to SENSE comparator for line-compensated OLP.
4 RI	Oscillator bias	Resistor-to-ground sets switching frequency; 26 kΩ yields 65 kHz; tolerance directly impacts EMI profile and efficiency.
5 ADJ	Skip threshold & latch control	Voltage >4.5 V latches IC until VCC drops below 4.5 V; also adjusts skip-cycle entry point for optimal standby/noise trade-off.
6 SENSE	Current sense input	Monitors primary-side current via sense resistor; includes 250 ns leading-edge blanking to reject MOSFET turn-on spikes.
7 VCC	Supply input	Power rail for internal circuitry and gate driver; clamped at 34 V; UVLO and OVP (28.5 V) protect against supply faults.
8 GATE	Driver output	PWM output driving external N-channel MOSFET gate; 500 mA drive strength supports fast turn-on/turn-off with <350 ns rise/fall times.

Key Features

Feature	Design Value
Green mode + skip cycle	Reduces standby power to <100 mW while eliminating audible coil whine in LCD/TV power supplies.
Programmable brownout & line OVP	Configurable via BOK resistor divider - protects against undervoltage stress and line surges without external components.
Internal slope compensation	Eliminates need for external ramp generator in continuous conduction mode flyback designs, simplifying loop compensation.
Smart protection logic	Three versions (AP3102/AP3102V/AP3102L) offer selectable latch/auto-recover behavior for VOVP, OLP, and ADJ-triggered faults.
Pin fault immunity	Detects and disables PWM on SENSE/RI/FB floating or RI short-to-ground - prevents false triggering and catastrophic failure.

Applications

LCD Monitor Power Supply

Notebook Adapter

Use Scenario: 19–24 V, 3–5 A open-frame flyback supply powering LCD panel backlight and logic board.

IC Role / Device Role / Timing Role: Primary-side PWM controller regulating output via opto-coupled feedback; manages burst-mode transitions at <10% load.

Use Value: 22 kHz skip frequency eliminates audible noise from transformers and chokes during screen-saver or sleep states.

Use Scenario: Universal-input (90–264 VAC), 19 V/3.42 A adapter with <300 mW no-load consumption.

IC Role / Device Role / Timing Role: Green-mode controller enabling DOE VI/ERP Tier 2 compliance; RI resistor sets 65 kHz for optimal EMI filter size.

Use Value: 5 μA start-up current allows 2 MΩ start-up resistor, cutting dissipation by >60% vs. conventional controllers.

Open-Frame SMPS

USB-C PD Auxiliary Controller

Use Scenario: 12 V/10 A industrial open-frame supply with wide ambient range (−40°C to +85°C).

IC Role / Device Role / Timing Role: Main PWM IC with BOK-based line compensation ensuring constant OLP across 85–264 VAC input.

Use Value: Internal 155°C thermal shutdown + 25°C hysteresis prevents derating in sealed enclosures without airflow sensors.

Use Scenario: Secondary-side regulated USB-C PD 3.0 adapter where AP3102MTR-G1 controls primary flyback stage.

IC Role / Device Role / Timing Role: Isolated primary controller synchronized to secondary-side CC/CV handshake via opto-coupler FB pin.

Use Value: 4.2 V FB OLP threshold enables precise short-circuit response (<35 ms) without compromising transient regulation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ICE2PCS01G	Fixed 65 kHz frequency; no ADJ pin; only auto-recoverable OLP; no BOK line compensation.	Lacks skip-mode noise suppression and line-compensated OLP - unsuitable for universal-input adapters needing tight output power regulation.	Select when cost sensitivity outweighs EMI/audible-noise requirements and input line variation is narrow.
KA3842A	Voltage-mode control; no green mode; 1 mA start-up current; no integrated slope compensation or BOK functionality.	Requires external slope compensation network and separate brownout/OVP circuits - increases BOM count and layout complexity.	Choose only for legacy designs where footprint compatibility with DIP-8 is mandatory and efficiency >85% is not required.

Compared with ICE2PCS01G and KA3842A, AP3102MTR-G1 delivers lower standby loss, tighter line/load regulation via BOK feedforward, and simplified protection implementation - making it optimal for new-design, RoHS-compliant AC-DC supplies targeting global energy standards.

Availability

AP3102MTR-G1 is available at Aetrix Electronics and suitable for LCD monitor power supplies, notebook adapters, and open-frame switching power supplies requiring stable component supply, green-mode compliance, and SO-8 thermal performance.

Supply support for AP3102MTR-G1 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in power management, signal integrity, and protection solutions for consumer, industrial, and computing markets.

The AP3102 series belongs to Diodes' green-mode AC-DC controller product line, designed specifically for cost-sensitive, high-efficiency off-line flyback converters in displays, adapters, and auxiliary power applications.

FAQ

What protection functions does AP3102MTR-G1 support, and how do they differ across AP3102/V/L variants?

AP3102MTR-G1 supports cycle-by-cycle OCP, VCC OVP (28.5 V), line OVP (4 V on BOK), brownout (0.5 V on BOK), OTP (155 °C), and OLP (via FB pin). The AP3102 variant offers auto-recoverable VOVP and OLP with external latch-only shutdown; AP3102V adds latch for VOVP; AP3102L extends latch to VOVP, OLP, and ADJ-triggered faults - all confirmed in the DS37419 Rev.2 functional block diagram and ordering table.

Can AP3102MTR-G1 operate without an external opto-coupler in primary-side sensing configurations?

No - the FB pin requires connection to an opto-coupler's cathode for closed-loop voltage regulation, as specified in the "FB Pin and Short Circuit Protection" section of DS37419. Primary-side sensing alternatives (e.g., auxiliary winding feedback) are unsupported; the IC lacks internal reference or ZCD inputs needed for such topologies.

What is the minimum recommended value for the RI resistor, and what happens if it falls below that?

The datasheet specifies R_RI = 26 kΩ for 65 kHz operation and confirms stable function down to 10 kΩ (f_OSC ≈ 172 kHz). Below 10 kΩ, oscillator instability and excessive ICC (>4 mA) occur per Electrical Characteristics tables; frequencies above 130 kHz degrade EMI performance and increase MOSFET switching losses.

How does the BOK pin enable line-compensated over-load protection, and what resistor ratio achieves 264 VAC line OVP?

BOK voltage scales with bulk DC voltage via a resistor divider; line OVP triggers at 4 V on BOK. For 264 VAC (≈373 VDC bulk), a 18 kΩ/1 kΩ divider (R1/R2) yields ~3.95 V at BOK - within the 3.5–4.5 V trip range. This same divider sets brownout at 0.5 V (≈47 VDC), matching the 85 VAC minimum input requirement.

AP3102MTR-G1 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Output Type:: PWM Signal

Function:: -

Output Configuration:: Positive

Topology:: -

Number of Outputs:: 1

Output Phases:: -

Voltage - Supply (Vcc/Vdd):: 10V ~ 25V

Frequency - Switching:: 65kHz

Duty Cycle (Max):: 80%

Synchronous Rectifier:: No

Clock Sync:: No

Serial Interfaces:: -

Control Features:: Current Limit, Frequency Control

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

AP3102MTR-G1 FAQ

1.How can I place an order for AP3102MTR-G1 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP3102MTR-G1 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 AP3102MTR-G1 reliable?

The price and inventory of AP3102MTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3102MTR-G1 is usually 5 days.

3.What payment methods are accepted for AP3102MTR-G1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3102MTR-G1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP3102MTR-G1?

AP3102MTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP3102MTR-G1 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 AP3102MTR-G1?

For technical support, including AP3102MTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3102MTR-G1 requirements.

6.How does Aetrix verify that AP3102MTR-G1 is sourced from the original manufacturer or authorized distributors?

All AP3102MTR-G1 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 AP3102MTR-G1 meets industry standards.

7.What is the process for return or replacement of AP3102MTR-G1?

All AP3102MTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3102MTR-G1, 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 AP3102MTR-G1 part is unused and in its original packaging.

Return procedure for AP3102MTR-G1:

1.Submit a request within 90 days.

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

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