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Diodes Incorporated AP3032KTR-G1
- Part No.:
- AP3032KTR-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- SOT-23-6
- Datasheet:
-
AP3032KTR-G1.pdf
- Description:
- IC LED DRV RGLTR PWM SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:13,538
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Product details
Overview
AP3032KTR-G1 from BCD Semiconductor is a constant-frequency 1 MHz white LED step-up DC/DC converter in SOT-23-6 package, designed to drive up to 4 parallel LED strings of 7 series each (28 total LEDs) with 200 mV feedback reference and 1.4 A cycle-by-cycle current limit. It delivers up to 81% efficiency at 5 V input and 80 mA output, featuring integrated OVP, soft-start, standby-mode dimming, and thermal shutdown for LCD backlight applications.
For engineers reviewing the AP3032KTR-G1 datasheet, AP3032KTR-G1 pinout, AP3032KTR-G1 application, or AP3032KTR-G1 equivalent, key selection criteria include its 2.7–9 V input range, 27 V overvoltage clamp, 0.7–1.3 MHz switching frequency tolerance, and CTRL-pin-based high-frequency PWM dimming support above 25 kHz to avoid audible noise.
Technical Context
The AP3032 employs current-mode PWM control with a 1.2 MHz oscillator and internal ramp compensation to ensure stable regulation across line and load variations. Its error amplifier compares 200 mV FB voltage against a precision reference, enabling accurate LED current control independent of forward voltage drift.
Operation integrates cycle-by-cycle current limiting (1.4 A typ), overvoltage protection triggered at 27 V (clamped), and dual-mode CTRL pin control: logic-level enable/disable and sub-0.7 ms low-pulse standby entry for flicker-free dimming. Thermal shutdown activates at 160 °C with 20 °C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1 MHz typical; enables use of compact 6.8 µH inductor and 1 µF aluminum output capacitor |
| Feedback Reference Voltage | 200 mV ±12 mV; sets LED current via external sense resistor with minimal dependency on VF variation |
| Current Limit Threshold | 1.4 A typical; protects switch during overload or short-circuit while supporting peak LED string demands |
| OVP Threshold | 27 V typical; clamps output during open-load (e.g., LED string failure), preventing damage to downstream components |
| Input Voltage Range | 2.7 V to 9 V; supports single-cell Li-ion (3.0–4.2 V), dual-cell alkaline (2.7–3.6 V), and 5 V USB-supplied systems |
| Efficiency | 81% at VIN=5 V, IOUT=80 mA; minimizes power loss and thermal stress in space-constrained backlight designs |
| Soft-start Time | 300 µs typical; limits inrush current during power-up to prevent input rail sag and system reset |
Pinout & Package
The AP3032KTR-G1 is housed in a thermally enhanced SOT-23-6 package (2.82 × 2.95 × 1.45 mm, 0.95 mm height), optimized for low-profile backlight modules with exposed pad for improved heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Power switch node | Connects to external inductor and Schottky diode; carries pulsed 1.4 A peak current and must be routed with low-inductance layout |
| 2 GND | Analog and power ground | Common return for FB, CTRL, OV, and internal circuitry; requires low-impedance connection to PCB ground plane |
| 3 FB | Voltage feedback input | Senses output voltage divider; 200 mV reference enables precise current regulation via RISET resistor |
| 4 CTRL | Enable/dimming control | Logic-high (>1.2 V) enables operation; PWM input >25 kHz enters standby mode for silent dimming |
| 5 OV | Overvoltage protection sense | Directly connected to output; triggers clamp at 27 V to protect LEDs and driver under open-circuit conditions |
| 6 VIN | Input supply | Accepts 2.7–9 V; requires local 1 µF ceramic bypass capacitor placed near pin for stability |
Key Features
| Feature | Design Value |
|---|---|
| High-frequency PWM dimming | CTRL pin accepts >25 kHz PWM signals to enter standby mode-eliminates audible coil whine in portable displays |
| Integrated OVP with clamp | 27 V output clamp prevents overvoltage damage during LED string disconnection without external Zener or TVS |
| Low 200 mV feedback threshold | Reduces power loss in current-sense resistor by ~80% vs. conventional 1.25 V references, improving efficiency |
| Thermal shutdown with hysteresis | Shuts down at 160 °C and re-enables at 140 °C, preventing thermal runaway in enclosed backlight assemblies |
| UVLO and soft-start | Enables clean startup above 2.7 V and limits inrush current to protect input capacitors and source regulators |
Applications
| 7"–10" LCD Backlight | Digital Photo Frame |
|---|---|
Use Scenario: Driving 4 parallel strings of 7-series white LEDs in thin-profile tablet or portable navigation displays. IC Role / Device Role / Timing Role: Primary boost controller regulating constant current to LED strings using 200 mV FB reference and 1 MHz switching. Use Value: Enables compact design with 1 mm tall inductor and eliminates need for external OVP components due to integrated 27 V clamp. | Use Scenario: Powering uniform backlight for 4.3"–7" photo frames with variable ambient light and battery operation. IC Role / Device Role / Timing Role: High-efficiency LED driver with UVLO and soft-start ensuring reliable startup from depleting Li-ion cells. Use Value: 81% efficiency at 5 V/80 mA extends battery life; CTRL-pin dimming supports smooth brightness transitions without audio artifacts. |
| GPS Receiver Display | Industrial HMI Panel |
Use Scenario: Illuminating small-form-factor GPS units operating across automotive temperature range (−40°C to +85°C). IC Role / Device Role / Timing Role: Robust LED driver with thermal shutdown (160°C trip) and −40°C to +85°C guaranteed operation. Use Value: Maintains consistent luminance despite wide temperature swings; OVP protects against LED open-circuit failures in field-deployed units. | Use Scenario: Backlighting ruggedized 5"–8" industrial HMIs exposed to vibration, ESD, and extended runtime. IC Role / Device Role / Timing Role: Current-mode boost regulator with 2000 V HBM ESD rating on CTRL/FB pins and cycle-by-cycle current limiting. Use Value: Survives harsh environments without latch-up; standby-mode dimming allows firmware-controlled brightness without flicker or noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED boost driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP3031KTR-G1 | Same architecture but fixed 1.2 MHz frequency; no CTRL-pin standby mode; 1.3 A current limit | Lacks high-frequency PWM dimming capability; suited for static-brightness or analog-dimming only | Select when dimming is handled externally (e.g., via FB voltage modulation) and 1.2 MHz stability is preferred |
| MT9700-12 | 1.5 MHz switching; 30 V OVP; 1.5 A current limit; requires external soft-start capacitor | Higher OVP threshold increases risk of LED overvoltage in open-load; no integrated standby mode | Choose for higher output voltage margin (e.g., 12-string configurations) where external soft-start is acceptable |
Compared with AP3031KTR-G1 and MT9700-12, the AP3032KTR-G1 uniquely combines 1 MHz operation, 27 V OVP clamping, and CTRL-pin-triggered standby mode-enabling silent, high-frequency dimming essential for consumer-grade portable displays.
Availability
AP3032KTR-G1 is available at Aetrix Electronics and suitable for 7"–10" LCD panels, digital photo frames, and GPS receiver displays requiring stable component supply, RoHS-compliant green packaging, and production-ready tape-and-reel delivery.
Supply support for AP3032KTR-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 IC designer and foundry partner specializing in high-efficiency power management, LED drivers, and mixed-signal solutions for consumer and industrial markets.
The AP3032 belongs to BCD's WLED boost converter product line, engineered specifically for cost-sensitive, space-constrained LCD backlight applications demanding high efficiency, integrated protection, and flicker-free dimming.
FAQ
What is the minimum input voltage required for AP3032KTR-G1 to start switching?
The AP3032KTR-G1 incorporates under-voltage lockout (UVLO) with a turn-on threshold of 2.7 V. Below this voltage, the device remains disabled and draws only 50 µA shutdown current. Startup occurs reliably at 2.7 V with full functionality, including soft-start and current regulation, as verified across −40°C to +85°C.
How does the AP3032KTR-G1 achieve high-frequency PWM dimming without audible noise?
When a logic-low pulse shorter than 0.7 ms is applied to the CTRL pin, the AP3032 enters standby mode-shutting off the power switch while preserving internal bias. This eliminates inductor current ripple and associated coil whine. Re-enabling above 25 kHz ensures dimming occurs outside human hearing range.
Can the AP3032KTR-G1 drive more than 4 LED strings, and what limits scalability?
No-the AP3032KTR-G1 is rated for up to 4 parallel LED strings (7 series each) due to its 1.4 A switch current limit and thermal design in SOT-23-6. Attempting 5+ strings risks exceeding peak current or junction temperature (150°C max), triggering thermal shutdown or reduced reliability.
What is the role of the OV pin, and how should it be connected?
OV is the overvoltage protection sense input. It must be connected directly to the output node (post-boost diode). When voltage exceeds 27 V, the internal clamp activates, reducing switching frequency and limiting output current to prevent damage during LED string open-circuit faults.
AP3032KTR-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 9V
- Voltage - Output:
- -
- Current - Output / Channel:
- 1.4A (Switch)
- Frequency:
- 1MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
AP3032KTR-G1 FAQ
1.How can I place an order for AP3032KTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3032KTR-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 AP3032KTR-G1 reliable?
The price and inventory of AP3032KTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3032KTR-G1 is usually 5 days.
3.What payment methods are accepted for AP3032KTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3032KTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3032KTR-G1?
AP3032KTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3032KTR-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 AP3032KTR-G1?
For technical support, including AP3032KTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3032KTR-G1 requirements.
6.How does Aetrix verify that AP3032KTR-G1 is sourced from the original manufacturer or authorized distributors?
All AP3032KTR-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 AP3032KTR-G1 meets industry standards.
7.What is the process for return or replacement of AP3032KTR-G1?
All AP3032KTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3032KTR-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 AP3032KTR-G1 part is unused and in its original packaging.
Return procedure for AP3032KTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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