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Diodes Incorporated AP3612MTR-G1
- Part No.:
- AP3612MTR-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AP3612MTR-G1.pdf
- Description:
- IC LED DRVR CTRL PWM 75MA 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,047
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Product details
Overview
AP3612MTR-G1 from BCD Semiconductor is a boost-type 12-channel WLED backlight driver IC with integrated current sinks, operating from 4.5V to 33V input and delivering up to 75mA per string with 1.5% typical string-to-string current matching. It features programmable switching frequency (100kHz–1MHz), external PWM dimming, and comprehensive protection including OVP, OTP, LED open/short, and Schottky diode short-circuit detection. It is used in LCD TV backlight systems requiring uniform brightness across multiple LED strings.
For engineers reviewing the AP3612MTR-G1 datasheet, AP3612MTR-G1 pinout, AP3612MTR-G1 application, or AP3612MTR-G1 equivalent, key selection criteria include its 12-channel parallel sink architecture, ISET-resistor-based current programming, HSOP-28 package thermal performance (θJA = 59°C/W), and dual-package availability for layout flexibility in space-constrained display power designs.
Technical Context
The AP3612MTR-G1 implements a fixed-frequency current-mode boost controller with cycle-by-cycle overcurrent protection and an internal 5V LDO (VCC) for gate drive and bias. Its 12 independent current-sink channels are controlled by a shared reference set via the ISET pin, enabling precise per-string regulation without individual DACs.
Protection logic operates hierarchically: LED open detection triggers first (via VCH voltage collapse), followed by OVP (2.0V threshold on OVP pin), then short-circuit (7.3V CHx threshold), with latched shutdowns for OTP (160°C) and abnormal OVP (>3.2V). STATUS pin provides consolidated fault reporting across all monitored conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V–33V: Supports wide-range DC supplies including 12V/24V industrial rails and automotive battery variations. |
| Max Output Current per String | 75mA: Enables driving high-brightness WLED strings (e.g., 13× white LEDs in series) at full luminance. |
| Current Matching Accuracy | 1.5% (typ): Ensures consistent brightness across all 12 channels without active calibration. |
| Switching Frequency Range | 100kHz–1MHz: Adjustable via RT resistor; higher frequencies reduce inductor size, lower frequencies improve efficiency at high load. |
| OVP Threshold | 2.0V ±0.1V on OVP pin: Configurable output overvoltage cutoff using external resistor divider; hysteresis = 250mV. |
| Thermal Shutdown | 160°C (TJ): Protects against sustained overload; recovery at ~140°C with automatic soft-start restart. |
| PWM Dimming Support | 0.1–20kHz: Accepts standard microcontroller-generated PWM signals for flicker-free brightness control down to 1% duty cycle. |
Pinout & Package
AP3612MTR-G1 is packaged in HSOP-28 (17.89 × 10.65 mm, θJA = 59°C/W), optimized for thermal dissipation in backlight driver applications with exposed thermal pad.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| CH1–CH12 | LED current sink outputs | 12 independent low-side current sinks; each drives one WLED string; open-drain operation with 60V max VCH rating. |
| ISET | Current reference input | Connects to GND via resistor (e.g., 6.67kΩ → 60mA/string); sets all 12 channels simultaneously. |
| RT | Oscillator frequency control | Resistor-to-GND sets switching frequency; 100kΩ yields ~520kHz (±10%). |
| EN | Enable/disable control | Logic-level input: >2.4V enables IC; <0.5V shuts down supply current to <3µA. |
| DIM | PWM dimming input | Accepts 0.3–2.5V logic PWM signal; modulates all 12 channels synchronously. |
| STATUS | Fault status output | Open-drain logic-low assertion during any fault condition (open/short LED, OVP, OTP, etc.). |
| OUT | Boost switch gate driver | Drives external N-MOSFET gate with 5V or VIN−0.5V output; supports high-side boost topology. |
| VIN / VCC / GND | Power inputs and ground | VIN: main input (4.5–33V); VCC: internal 5V LDO output (bypass with 2.2µF ceramic); GND: common return for all sinks and analog circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| 12-channel current matching | 1.5% typical mismatch ensures uniform backlight luminance without per-string trimming. |
| Programmable OVP threshold | Configurable via external resistor divider on OVP pin; prevents damage from feedback loop failure or component drift. |
| Integrated LED open/short protection | Detects open strings (<100mV CHx) and shorted strings (>7.3V CHx); isolates faulty channel while maintaining others. |
| Schottky diode/inductor short protection | Monitors CS pin voltage; latches off if >0.8V persists >16 switching cycles, preventing MOSFET destruction. |
| External PWM dimming interface | Direct logic-level DIM input eliminates need for external level-shifting or filtering in MCU-driven displays. |
Applications
| LCD TV Backlight | LCD Monitor Backlight |
|---|---|
Use Scenario: Driving 12 parallel strings of 13-series white LEDs in edge-lit or direct-lit LCD TV panels with dynamic local dimming zones. IC Role / Device Role / Timing Role: Primary boost controller and current regulator; manages constant-current delivery, fault monitoring, and PWM dimming synchronization across all strings. Use Value: Enables high-contrast, uniform illumination with minimal brightness variation (<1.5% channel mismatch) and robust fault tolerance during panel aging or thermal stress. | Use Scenario: Powering compact 24-inch LCD monitors with thin bezels requiring high-efficiency, low-EMI backlight solutions. IC Role / Device Role / Timing Role: High-voltage boost driver with integrated current sinks; handles input voltage transients and provides stable current under varying ambient temperature. Use Value: Reduces BOM count by eliminating discrete current-setting resistors per string and simplifies PCB layout with single-point ISET programming. |
| LCD Display Module | Industrial HMI Display |
Use Scenario: Embedded LCD display modules in medical devices or kiosks where reliability and long-term luminance stability are critical. IC Role / Device Role / Timing Role: Fault-aware LED driver with STATUS pin reporting; integrates UVLO, OTP, and OVP to ensure safe operation in unattended environments. Use Value: Prevents catastrophic failure from LED string opens or shorts, extending field lifetime and reducing service calls. | Use Scenario: Ruggedized human-machine interface displays in factory automation equipment exposed to wide temperature swings (−40°C to +85°C). IC Role / Device Role / Timing Role: Thermally robust backlight controller in HSOP-28 package; maintains current regulation accuracy across full industrial temperature range. Use Value: Delivers consistent brightness and color point despite ambient fluctuations, supporting operator readability in harsh lighting conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-channel WLED boost driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL8862T-13 (Diodes Inc.) | 12-channel, but uses external MOSFETs only; no integrated VCC LDO; requires separate bias supply. | Lacks internal 5V regulator - increases system complexity and component count for gate drive. | Choose when board space allows discrete bias design and cost sensitivity outweighs integration benefit. |
| LM3409QMY/NOPB (TI) | Single-channel controller; requires 12x ICs + external current sinks; no native multi-string matching. | No built-in current matching - demands precision external resistors or DACs for uniformity. | Prefer only for legacy designs already using LM3409 or where channel independence justifies added layout area and calibration effort. |
Compared with AL8862T-13 and LM3409QMY/NOPB, AP3612MTR-G1 reduces total solution size by integrating 12 current sinks, a 5V LDO, and comprehensive protection in one HSOP-28 package - cutting BOM count by ≥10 components and eliminating inter-channel calibration.
Availability
AP3612MTR-G1 is available at Aetrix Electronics and suitable for LCD TV backlight systems, industrial HMI displays, medical monitor modules, and commercial signage requiring stable component supply, RoHS-compliant green packaging (G1 suffix), and long-term production continuity.
Supply support for AP3612MTR-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
BCD Semiconductor Manufacturing Limited is a Shanghai-based analog and power IC designer specializing in high-efficiency LED drivers, motor controllers, and power management solutions for consumer, industrial, and automotive markets.
The AP3612 belongs to BCD's WLED backlight driver product line, engineered specifically for cost-sensitive, high-reliability LCD display applications requiring multi-string current matching, wide-input operation, and integrated fault protection without external supervision.
FAQ
What is the function of the ISET pin on AP3612MTR-G1?
The ISET pin sets the reference current for all 12 LED channels via an external resistor to GND. A 6.67kΩ resistor yields 60mA per string; values from 20mA to 75mA are supported. The pin operates at ~1.25V internally, and current scales inversely with resistance (ILED ≈ 400 mA·kΩ / RISET). No external voltage source is required.
How does the STATUS pin indicate fault conditions?
The STATUS pin is an open-drain output that pulls low during any fault: LED open/short, OVP trigger (>2.0V), OTP shutdown (>160°C), VOUT short, Schottky diode failure, or abnormal OVP (>3.2V). It remains low until the fault clears and EN is toggled or VIN is cycled. A pull-up resistor (e.g., 10kΩ to VCC) is required for proper logic-level signaling.
Can AP3612MTR-G1 drive more than 12 LED strings?
No - it has exactly 12 dedicated current-sink outputs (CH1–CH12). To drive more strings, multiple AP3612 ICs must be synchronized using shared RT and DIM signals. Parallel operation is supported, but each IC independently regulates its 12 strings; inter-IC current matching is not guaranteed and requires external calibration.
What package type does AP3612MTR-G1 use, and why is it specified as MTR?
AP3612MTR-G1 uses the HSOP-28 package (17.89 × 10.65 mm, exposed thermal pad), denoted by "MTR" in the part number. This differs from the SOIC-24 variant (AP3612M-G1). The HSOP-28 offers superior thermal performance (θJA = 59°C/W vs. 100°C/W) and higher power handling - essential for 12-string backlight drivers dissipating >1W in compact displays.
AP3612MTR-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- DC DC Controller
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 12
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 33V
- Voltage - Output:
- -
- Current - Output / Channel:
- 75mA
- Frequency:
- 100kHz ~ 1MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC
AP3612MTR-G1 FAQ
1.How can I place an order for AP3612MTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3612MTR-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 AP3612MTR-G1 reliable?
The price and inventory of AP3612MTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3612MTR-G1 is usually 5 days.
3.What payment methods are accepted for AP3612MTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3612MTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3612MTR-G1?
AP3612MTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3612MTR-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 AP3612MTR-G1?
For technical support, including AP3612MTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3612MTR-G1 requirements.
6.How does Aetrix verify that AP3612MTR-G1 is sourced from the original manufacturer or authorized distributors?
All AP3612MTR-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 AP3612MTR-G1 meets industry standards.
7.What is the process for return or replacement of AP3612MTR-G1?
All AP3612MTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3612MTR-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 AP3612MTR-G1 part is unused and in its original packaging.
Return procedure for AP3612MTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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