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Diodes Incorporated AP3033KTTR-G1
- Part No.:
- AP3033KTTR-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
AP3033KTTR-G1.pdf
- Description:
- IC LED DRVR RGLTR PWM TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,664
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Product details
Overview
AP3033KTTR-G1 from BCD Semiconductor Manufacturing Limited is a white LED step-up DC/DC converter IC designed for backlight driving in 7″–10″ LCD panels using 3-series, 8-parallel (3S8P) LED arrays. It delivers up to 1.3A switch current, operates at a fixed 1MHz PWM frequency, supports 3V–16V input, and features 200mV feedback reference voltage with overvoltage protection clamping at ~17V.
For engineers reviewing the AP3033KTTR-G1 datasheet, AP3033KTTR-G1 pinout, AP3033KTTR-G1 application, or AP3033KTTR-G1 equivalent, key selection considerations include its TSOT-23-6 package footprint, cycle-by-cycle current limiting, high-frequency PWM dimming capability via CTRL pin, and thermal shutdown at 150°C junction temperature.
Technical Context
The AP3033 employs constant-frequency current-mode control with internal 1MHz oscillator and ramp compensation, enabling stable regulation under varying line and load conditions. Its error amplifier compares 200mV FB voltage against a precision reference, while the PWM comparator modulates Q1 duty cycle based on sensed switch current plus slope compensation.
OVP is implemented via dedicated OV pin, allowing direct or resistor-divider connection to output to set clamping threshold (~17V typical). Soft-start is internally timed (~80µs), triggered by CTRL low pulse >450µs; shorter pulses enable standby mode for high-frequency PWM dimming without reinitialization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 16V - supports single-cell Li-ion (4.2V), dual-cell alkaline (3V), or 12V rail inputs without external LDO pre-regulation. |
| Switching Frequency | 1MHz (typ.) - enables use of compact 10µH inductor and 10µF ceramic output capacitor, reducing board area and EMI filter size. |
| Feedback Reference Voltage | 200mV ±12mV - sets LED current via external RISET resistor; accuracy directly determines LED current tolerance across temperature. |
| Overvoltage Protection Threshold | 17V (typ.) - clamps output during open-load LED failure, preventing damage to downstream components and reducing input current surge. |
| Current Limit | 1.3A (typ.) - defines maximum peak inductor current; supports 3S8P WLED strings (e.g., 9.6V VF, 160mA total) with margin. |
| CTRL Pin Function | Dual-mode: logic-high enables operation; low pulse >450µs triggers soft-start; low pulse <450µs enters standby for PWM dimming. |
| Thermal Shutdown | 150°C (junction) - disables switching until die cools, protecting MOSFET and bond wires during sustained overload or poor PCB thermal design. |
Pinout & Package
AP3033KTTR-G1 is housed in a 6-pin TSOT-23-6 package (2.8mm × 2.9mm × 1.0mm max height), with exposed pad for thermal dissipation. Pin 1 marked by dot; pin numbering clockwise from dot (top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SW | Switch Node | Connects to inductor and Schottky diode anode; carries high dI/dt switching current; requires short, low-inductance layout. |
| 2 - GND | Power Ground | Main return path for switch current and IC bias; must be connected to low-impedance ground plane adjacent to SW pin. |
| 3 - FB | Voltage Feedback Input | Senses output voltage divider; 200mV reference sets regulated LED current; high-impedance node sensitive to noise coupling. |
| 4 - CTRL | Enable & Dimming Control | Active-high enable; PWM-dimming interface; internal hysteresis distinguishes soft-start (≥450µs low) from standby (short low pulse). |
| 5 - OV | Overvoltage Protection Input | Monitors output via direct connection or resistor divider; triggers clamping when voltage exceeds ~17V; open-drain OVP flag not provided. |
| 6 - VIN | Input Supply | Primary power input (3–16V); requires local 10µF ceramic bypass capacitor placed within 2mm of pin to suppress high-frequency ripple. |
Key Features
| Feature | Design Value |
|---|---|
| High-efficiency boost conversion | 92% at VIN=9V/IOUT=160mA - minimizes thermal load in space-constrained backlight modules and extends battery runtime. |
| Integrated soft-start & standby modes | 80µs internal soft-start + 450µs CTRL pulse threshold - eliminates inrush current stress on input capacitors and enables flicker-free PWM dimming. |
| Precision 200mV feedback reference | ±12mV over –40°C to +85°C - ensures consistent LED current across temperature without trimming resistors or external references. |
| Cycle-by-cycle current limiting | 1.3A peak switch current limit - protects internal MOSFET during startup, short-circuit, or inductor saturation events. |
| Thermal shutdown with hysteresis | 150°C trip / ~135°C recovery - prevents permanent junction damage during sustained overload while avoiding thermal cycling instability. |
Applications
| 7″–10″ LCD Panel Backlight | Digital Photo Frame |
|---|---|
|
Use Scenario: Driving 3S8P white LED arrays in portable LCD displays requiring uniform brightness and low EMI. IC Role / Device Role / Timing Role: Primary boost controller regulating constant LED current; 1MHz switching provides predictable noise spectrum for EMI filtering. Use Value: Enables compact 10µH inductor + 10µF capacitor solution, reducing bill-of-materials cost and PCB area versus lower-frequency alternatives. |
Use Scenario: Powering multi-color LED backlights in consumer photo frames with variable ambient light and battery life constraints. IC Role / Device Role / Timing Role: Constant-current LED driver with programmable dimming via CTRL pin PWM; UVLO prevents erratic behavior during battery brownout. Use Value: 200mV FB reference and 92% efficiency extend AA/AAA battery life beyond 8 hours per charge at full brightness. |
| GPS Receiver Display | Netbook Keyboard Backlight |
|
Use Scenario: Illuminating small-format monochrome or color LCDs in handheld GPS units operating across automotive temperature ranges. IC Role / Device Role / Timing Role: Robust LED driver with –40°C to +85°C operation, OVP, and thermal shutdown for unregulated 12V vehicle power inputs. Use Value: 17V OVP clamping protects display circuitry during load dump transients; 265°C/W θJA allows operation without heatsink in sealed enclosures. |
Use Scenario: Providing adjustable keyboard backlighting in ultra-thin netbooks where thermal headroom and component height are constrained. IC Role / Device Role / Timing Role: Low-profile (1mm tall inductor compatible) boost converter with TSOT-23-6 footprint; CTRL pin supports system-level PWM dimming. Use Value: TSOT-23-6 package fits tight spacing between keyboard matrix and palm rest; 1MHz switching avoids audible coil whine in quiet environments. |
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 |
|---|---|---|---|
| AP3032KTTR-G1 | Same family, but 500kHz switching frequency and 1.1A current limit; lacks OV pin - relies on external OVP or system-level detection. | Lower efficiency at high output voltages; requires larger inductor (22µH) and higher-profile capacitor; unsuitable for open-load fault protection. | Select only if board space permits larger magnetics and OVP is handled externally; not drop-in for AP3033's 1MHz/1.3A/OV requirements. |
| RT9284GJ6 | 1.2MHz switching, 1.5A current limit, 200mV FB, but uses SOT-23-6 with different pinout (no dedicated OV pin); includes integrated Schottky. | Higher peak current supports brighter LEDs, but integrated diode limits flexibility; no OV pin reduces fault coverage vs. AP3033's dedicated OV monitoring. | Prefer for cost-sensitive designs where integrated diode simplifies layout; avoid if OVP clamping at 17V and independent diode selection are required. |
Compared with AP3032KTTR-G1 and RT9284GJ6, the AP3033KTTR-G1 uniquely combines 1MHz operation, 1.3A switch current, and a dedicated OV pin for precise 17V clamping - making it optimal for compact, fault-tolerant LCD backlight designs requiring minimal external components.
Availability
AP3033KTTR-G1 is available at Aetrix Electronics and suitable for 7″–10″ LCD panel backlighting, digital photo frame illumination, and GPS receiver display applications requiring stable component supply, RoHS-compliant green packaging, and tape-and-reel delivery for automated assembly.
Supply support for AP3033KTTR-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 design and wafer fabrication company specializing in power management, LED drivers, and mixed-signal solutions for consumer, industrial, and automotive markets.
The AP3033 belongs to BCD's white LED backlight driver product line, engineered specifically for high-efficiency, compact-area boost conversion in portable LCD displays with stringent thermal and EMI constraints.
FAQ
What is the minimum input voltage required for AP3033KTTR-G1 to regulate a 10V LED string?
The AP3033KTTR-G1 requires sufficient headroom between VIN and VOUT to sustain regulation. For a 10V output, the minimum VIN is approximately 2.6V at light loads, but datasheet-recommended minimum is 3V across temperature. At full 160mA load and 10V output, practical minimum VIN is ~3.8V due to switch RDS(on) and diode drop - confirmed by Figure 6 (Min Operating Voltage vs. Case Temperature).
Can AP3033KTTR-G1 drive more than 3S8P LED configurations?
Yes, but with derating. The 1.3A switch current limit supports up to ~24 LEDs in 4S6P (4-series, 6-parallel) configuration at 20mA per string (120mA total), assuming VF ≤ 3.2V. Higher string counts increase output voltage and reduce efficiency; thermal performance must be validated per layout, as θJA = 265°C/W limits continuous power in still-air conditions.
How does the CTRL pin implement high-frequency PWM dimming without visible flicker?
The CTRL pin detects low-pulse duration: pulses <450µs place AP3033 in standby mode, halting switching while retaining regulation state. Rapid toggling (e.g., 10kHz) between standby and active states modulates average LED current without restarting soft-start or causing output voltage overshoot - enabling flicker-free dimming down to 0.1% duty cycle per Figure 14 waveform analysis.
Is the OV pin mandatory for safe operation?
No, but strongly recommended. If left unconnected, OVP defaults to internal ~17V clamp, but this relies on internal sensing and may lack precision under fast transients. Connecting OV directly to VOUT ensures accurate clamping; using a resistor divider allows custom thresholds (e.g., 12V for lower-voltage LED strings), improving system robustness during open-circuit faults.
AP3033KTTR-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 16V
- Voltage - Output:
- 38V
- Current - Output / Channel:
- 1.3A (Switch)
- Frequency:
- 1MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
AP3033KTTR-G1 FAQ
1.How can I place an order for AP3033KTTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3033KTTR-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 AP3033KTTR-G1 reliable?
The price and inventory of AP3033KTTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3033KTTR-G1 is usually 5 days.
3.What payment methods are accepted for AP3033KTTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3033KTTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3033KTTR-G1?
AP3033KTTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3033KTTR-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 AP3033KTTR-G1?
For technical support, including AP3033KTTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3033KTTR-G1 requirements.
6.How does Aetrix verify that AP3033KTTR-G1 is sourced from the original manufacturer or authorized distributors?
All AP3033KTTR-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 AP3033KTTR-G1 meets industry standards.
7.What is the process for return or replacement of AP3033KTTR-G1?
All AP3033KTTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3033KTTR-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 AP3033KTTR-G1 part is unused and in its original packaging.
Return procedure for AP3033KTTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP3033KTTR-G1 Tags
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BCR420UE6433HTMA1
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