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Diodes Incorporated AP3608EGTR-G1
- Part No.:
- AP3608EGTR-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
AP3608EGTR-G1.pdf
- Description:
- IC LED DRV LIN PWM 100MA 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,843
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Product details
Overview
AP3608EGTR-G1 from BCD Semiconductor is an eight-channel constant-current LED sink driver with ±1.5% current matching, designed for backlight and display LED arrays. It operates from 4.2V to 5.5V input, supports per-channel current setting from 10mA to 100mA via external ISET resistor, and enables PWM dimming (0.1–25 kHz) for precise brightness control in LCD TV and notebook backlight systems.
For engineers reviewing the AP3608EGTR-G1 datasheet, AP3608EGTR-G1 pinout, AP3608EGTR-G1 application, or AP3608EGTR-G1 equivalent, key selection criteria include channel count, current match accuracy, open-LED protection behavior, FB/SDB interface compatibility with boost controllers, and thermal shutdown at 160°C.
Technical Context
The AP3608EGTR-G1 integrates eight matched current sinks with internal 400× current gain referenced to a 1.194 V ISET pin voltage. Each channel delivers up to 100 mA at 1.5 V forward drop, with saturation voltage ≤1.2 V at full load and current matching maintained across temperature (−40°C to +85°C).
Its dual-interface architecture uses FB and SDB pins to coordinate with external DC/DC converters-FB outputs the minimum string voltage for closed-loop regulation, while SDB signals shutdown or PWM-synchronous status. Parallel operation is enabled via FBX/SDBX interconnection between multiple AP3608E units.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel Count | 8 independent constant-current sinks for parallel LED strings |
| Current Match Accuracy | ±1.5% between any two channels at 60 mA, ensuring uniform brightness |
| Max Output Current/Ch | 100 mA at 1.5 V CHX, enabling high-brightness white LED driving |
| PWM Dimming Range | 1%–100% average current control with 0.1–25 kHz input frequency |
| Open-LED Protection | Detects open strings at ≥3.0 V and removes faulty channel from FB feedback loop |
| Thermal Shutdown | Activates at 160°C with 20°C hysteresis to prevent damage during overload |
| UVLO Threshold | Falls at 3.6–4.0 V with 200 mV hysteresis, preventing erratic startup below 4.2 V |
Pinout & Package
AP3608EGTR-G1 is packaged in TSSOP-20(EDP), a 20-pin, 6.4 mm × 4.4 mm surface-mount package with exposed thermal pad. Pin 1 is marked by notch or dot; AGND and PGND are separate ground terminals requiring low-impedance PCB connection to minimize noise and thermal resistance (θJA = 35°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH1–CH8 | LED cathode current sink output | Each connects directly to LED string cathode; unused pins must be grounded |
| ISET | Reference current programming input | 1.194 V reference; RISET sets full-scale current as ICHX = 400 × (1.194 V / RISET) |
| FB | Feedback interface to DC/DC converter | Outputs lowest voltage among CH1–CH8 to regulate boost output voltage |
| SDB | Status interface to DC/DC converter | Asserts low logic on EN disable or all-channel inactivity; synchronous with PWM during dimming |
| PWM | Digital brightness control input | Accepts 0.1–25 kHz square wave; high level enables full current, low level disables sink |
| EN | Global enable/disable control | Logic-high (>1.8 V) enables all channels; logic-low (<0.8 V) shuts down device |
| FBX / SDBX | Parallel interface terminals | Connect FBX to FB and SDBX to SDB of another AP3608E to synchronize multi-chip operation |
| VCC / AGND / PGND | Power and ground distribution | VCC supplies core logic and sinks; AGND is quiet analog ground; PGND handles high-current return paths |
Key Features
| Feature | Design Value |
|---|---|
| Eight-channel current matching | ±1.5% matching ensures consistent luminance across multi-string LCD backlights |
| Open-LED self-check and recovery | Detects open strings at 3.0 V and isolates fault without disabling remaining channels |
| DC/DC converter interface support | FB and SDB pins provide real-time feedback and status signaling for seamless boost controller integration |
| Parallel operation capability | FBX/SDBX pins allow stacking multiple AP3608E units to drive >8 LED strings with synchronized dimming |
| Robust protection suite | Includes under-voltage lockout (3.6–4.0 V), over-temperature shutdown (160°C), and ESD tolerance (6 kV HBM) |
Applications
| LCD Monitor Backlight | Notebook Display Backlight |
|---|---|
|
Use Scenario: Driving 8 parallel white LED strings behind a 15.6-inch IPS panel with local dimming zones. IC Role / Device Role / Timing Role: Constant-current sink managing per-string current with PWM-synchronized brightness scaling. Use Value: Maintains uniform luminance across zones using ±1.5% current match, while FB/SDB coordination prevents overvoltage during partial-string failure. |
Use Scenario: Powering edge-lit LED array in ultra-thin clamshell laptop with thermal constraints. IC Role / Device Role / Timing Role: Eight-channel current regulator with integrated UVLO and thermal shutdown for reliable operation in confined space. Use Value: Enables compact design via TSSOP-20 package and 35°C/W θJA, while open-LED detection avoids catastrophic boost overvoltage. |
| LCD TV Backlight Module | Industrial Display Panel |
|
Use Scenario: Backlighting 32-inch HD panel with dynamic contrast enhancement via PWM dimming. IC Role / Device Role / Timing Role: High-accuracy current sink supporting 0.1–25 kHz PWM for flicker-free dimming and smooth grayscale transitions. Use Value: Delivers 100 mA/channel at 1.5 V CHX to sustain peak brightness, with thermal hysteresis preventing nuisance shutdown during sustained load. |
Use Scenario: Driving ruggedized medical display backlight requiring long-term reliability and fault resilience. IC Role / Device Role / Timing Role: Fault-tolerant LED driver with open-string isolation and RoHS-compliant "G1" green packaging. Use Value: Ensures continuous operation during single-LED failure via automatic FB loop reconfiguration, meeting IEC 60601 safety margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar eight-channel constant-current LED sink applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL8862T-7DT | 6-channel sink with ±2% matching; no FB/SDB interface; requires external PWM generator | Lacks open-LED detection and DC/DC coordination-suitable only for simple fixed-voltage LED supplies | Select when system uses standalone boost IC without feedback signaling requirements |
| MPQ3367-AEC1 | 8-channel automotive-grade sink with ±1% matching; integrated MOSFET drivers; AEC-Q100 qualified | Supports 4.5–40 V input and 120 mA/channel; includes diagnostic registers via I²C | Choose for automotive infotainment displays needing extended voltage range and functional safety reporting |
Compared with AL8862T-7DT and MPQ3367-AEC1, the AP3608EGTR-G1 offers optimal balance of precision matching, integrated protection, and analog interface simplicity for cost-sensitive consumer display applications-without requiring I²C infrastructure or automotive qualification overhead.
Availability
AP3608EGTR-G1 is available at Aetrix Electronics and suitable for LCD monitor backlight, notebook display backlight, and industrial panel lighting applications requiring stable component supply, RoHS-compliant green packaging, and production-ready TSSOP-20 logistics.
Supply support for AP3608EGTR-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 fabless analog IC designer specializing in power management, LED drivers, and mixed-signal solutions for consumer, industrial, and computing markets.
The AP3608E product line targets cost-optimized, high-reliability LED backlighting-emphasizing current matching, open-fault resilience, and seamless integration with standard boost controllers in space-constrained displays.
FAQ
What is the minimum recommended ISET resistor value for full-scale 100 mA operation?
The ISET pin reference voltage is 1.194 V (typical). To achieve 100 mA per channel, use RISET = 1.194 V × 400 / 0.1 A = 4.776 kΩ. A standard 4.7 kΩ ±1% resistor yields ~101.2 mA, within absolute maximum ratings and matching specification.
Can AP3608EGTR-G1 drive LEDs with forward voltage exceeding 5.5 V?
Yes-the device sinks current from the LED anode supplied by an external boost converter. The CHx pins tolerate up to 40 V (breakdown rating), allowing use with high-Vf LED strings when paired with a properly regulated boost output voltage.
How does the SDB pin behave during PWM dimming versus static EN disable?
During PWM dimming, SDB toggles synchronously with the PWM signal's high/low states. When EN is pulled low, SDB asserts a steady low logic level to signal shutdown to the DC/DC converter-enabling coordinated power-down without voltage overshoot.
Is the exposed pad in the TSSOP-20 package electrically connected?
No-the exposed pad in AP3608EGTR-G1's TSSOP-20(EDP) package is thermally conductive only and must be soldered to a large copper pour for heat dissipation. It is not internally connected to any pin and should remain floating or tied to PGND solely for thermal enhancement.
AP3608EGTR-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 8
- Voltage - Supply (Min):
- 4.2V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 100mA
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP-EP
AP3608EGTR-G1 FAQ
1.How can I place an order for AP3608EGTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3608EGTR-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 AP3608EGTR-G1 reliable?
The price and inventory of AP3608EGTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3608EGTR-G1 is usually 5 days.
3.What payment methods are accepted for AP3608EGTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3608EGTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3608EGTR-G1?
AP3608EGTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3608EGTR-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 AP3608EGTR-G1?
For technical support, including AP3608EGTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3608EGTR-G1 requirements.
6.How does Aetrix verify that AP3608EGTR-G1 is sourced from the original manufacturer or authorized distributors?
All AP3608EGTR-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 AP3608EGTR-G1 meets industry standards.
7.What is the process for return or replacement of AP3608EGTR-G1?
All AP3608EGTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3608EGTR-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 AP3608EGTR-G1 part is unused and in its original packaging.
Return procedure for AP3608EGTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP3608EGTR-G1 Tags
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BCR402RE6327HTSA1
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BCR430UXTSA2
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BCR420UE6433HTMA1
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CL2N8-G
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BCR420UW6-7
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