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Diodes Incorporated AL9910-5S-13
- Part No.:
- AL9910-5S-13
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AL9910-5S-13.pdf
- Description:
- IC LED DRIVER OFFL PWM 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,995
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Product details
Overview
AL9910-5S-13 from Diodes Incorporated is a universal high-voltage PWM LED driver-controller designed for offline AC-powered LED lamps. It drives external MOSFETs up to 300kHz, regulates constant LED current via a single sense resistor (VCS(HI) = 237.5–262.5 mV), withstands 500V input, and supports both linear (LD pin) and PWM (PWM_D pin) dimming. Used in non-isolated buck topologies for 85–277VAC rectified inputs.
For engineers reviewing the AL9910-5S-13 datasheet, AL9910-5S-13 pinout, AL9910-5S-13 application, or AL9910-5S-13 equivalent, key selection criteria include its 7.5V gate drive, SO-8EP thermal performance (θJA = 66°C/W), ±5% current-sense tolerance, 0–100% PWM dimming support, and compatibility with high-voltage DC-DC LED drivers requiring transient resilience.
Technical Context
The AL9910-5S-13 implements a peak-current-mode buck controller with internal 7.5V LDO supply, UVLO (6.4–7.0 V), and thermal shutdown at +150°C. Its oscillator frequency (20–300 kHz) is set by ROSC-to-GND resistor, and it supports constant-off-time (PFM) mode when ROSC connects to GATE instead of GND.
It features 160–440 ns current-sense blanking, 30–50 ns gate rise/fall times, and a 200 kΩ internal pulldown on PWM_D. The LD pin accepts 0–250 mV analog signals to scale the CS threshold linearly, enabling soft-start via external capacitor coupling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 15–500 VDC - supports universal rectified AC (85–277VAC) and high-voltage DC supplies without external pre-regulation. |
| Current-Sense Threshold | 237.5–262.5 mV - ±5% tolerance enables precise LED current programming with external RSENSE. |
| Gate Drive Voltage | 7.5 V nominal - sufficient to fully enhance standard logic-level N-channel MOSFETs in high-side switch configuration. |
| Switching Frequency Range | 20–300 kHz - programmable via ROSC resistor; higher frequencies reduce inductor size but increase switching loss. |
| Thermal Resistance (SO-8EP) | 66 °C/W - enables 2.2 W power dissipation at +25°C ambient, supporting extended operation up to +105°C ambient. |
| PWM Dimming Input | 0–100% duty cycle, ≤ several kHz - TTL-compatible PWM_D pin directly enables/disables gate drive with no external logic required. |
| Linear Dimming Range | 45–250 mV on LD pin - scales current-sense threshold proportionally, allowing analog brightness control without altering RSENSE. |
Pinout & Package
AL9910-5S-13 is packaged in thermally enhanced SO-8EP (exposed pad), with pin 1 (VIN) to pin 8 (ROSC) arranged as shown in the top-view diagram. The EP pad must be soldered directly to PCB ground for optimal thermal performance and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | High-voltage input supply | Accepts 15–500 VDC; powers internal LDO and withstands 520 V transient surges. |
| CS | Current-sense comparator input | Monitors voltage across external RSENSE; triggers MOSFET turn-off when ≥237.5 mV. |
| GND | Signal and power ground reference | Common return for CS, PWM_D, LD, ROSC; EP pad must connect here for thermal conduction. |
| GATE | External MOSFET gate driver output | 7.5 V push-pull output with 30–50 ns edge rates; drives N-channel MOSFET gate capacitance directly. |
| PWM_D | Enable/dimming control input | Active-high TTL input; internal 200 kΩ pulldown ensures safe disable at power-up; 0–100% PWM controls LED on/off time. |
| VDD | Internally regulated supply rail | 7.5 V output from integrated LDO; supplies internal circuitry and can source ≤1 mA for auxiliary bias. |
| LD | Analog dimming control input | 0–250 mV input linearly reduces CS threshold; enables smooth analog dimming and soft-start via RC network. |
| ROSC | Oscillator timing terminal | Resistor to GND sets switching frequency; connecting to GATE enables constant-off-time (PFM) mode for improved light regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 7.5 V LDO | Eliminates startup resistor; delivers stable gate drive and ≤1 mA auxiliary current from high-voltage VIN rail. |
| ±5% current-sense accuracy | Ensures tight LED current regulation across temperature (-40°C to +105°C) without trimming or calibration. |
| SO-8EP thermal package | Reduces θJA to 66°C/W vs. 110°C/W for SO-8, enabling higher power density and extended ambient operation. |
| Programmable blanking interval | 160–440 ns built-in blanking prevents false current-sense triggering during MOSFET switching transitions. |
| Dual dimming interface | Independent LD (analog) and PWM_D (digital) pins allow hybrid dimming strategies without external ICs. |
Applications
| LED Offline Lamps | High-Voltage DC-DC LED Drivers |
|---|---|
|
Use Scenario: Mains-powered LED retrofit bulbs (A19, PAR30) operating directly from 120/230VAC rectified input. IC Role / Device Role / Timing Role: Constant-current buck controller regulating LED string current while rejecting line-frequency ripple. Use Value: Enables >90% efficiency and flicker-free illumination without isolated flyback topology or PFC stage. |
Use Scenario: Industrial signage powered from 375VDC telecom or solar battery banks driving long LED strings. IC Role / Device Role / Timing Role: High-voltage DC-DC step-down controller maintaining stable LED current despite wide input variation. Use Value: Withstands 500V transients and operates down to 15V input, ensuring reliability in unregulated HV DC systems. |
| Signage & Decorative Lighting | Backlighting for Flat Panel Displays |
|
Use Scenario: Architectural LED strips and channel letters requiring smooth dimming and thermal robustness in enclosed fixtures. IC Role / Device Role / Timing Role: Primary LED current regulator with dual LD/PWM_D dimming for local and system-level brightness control. Use Value: SO-8EP package dissipates heat efficiently in space-constrained enclosures; ±5% current tolerance ensures uniform luminance. |
Use Scenario: Edge-lit LCD backlight modules in commercial displays where EMI and efficiency are critical. IC Role / Device Role / Timing Role: Non-isolated buck controller delivering low-noise, tightly regulated current to parallel LED strings. Use Value: 30 ns gate edges and programmable frequency minimize conducted EMI; constant-off-time mode improves current stability at low dimming levels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage LED driver-controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL9910A-5S-13 | 10 V gate drive (vs. 7.5 V); 9–11 V VDD range (vs. 7.0–8.0 V); tighter 5% CS tolerance retained. | Better suited for higher-RDS(on) MOSFETs or higher-power designs requiring stronger gate drive. | Select AL9910A-5S-13 if driving 500V+ MOSFETs with >1Ω RDS(on) or needing higher VDD headroom. |
| AL9910-6S-13 | 6% CS tolerance (vs. 5%); VCS(HI) = 249–281 mV; same 7.5 V gate drive and SO-8EP package. | Lower-cost variant for less demanding luminance uniformity requirements (e.g., non-critical decorative lighting). | Choose AL9910-6S-13 when ±6% LED current variation is acceptable and cost sensitivity outweighs precision needs. |
Compared with AL9910-5S-13, the AL9910A-5S-13 offers higher gate drive for robust MOSFET switching under load, while AL9910-6S-13 trades current-sense accuracy for lower unit cost-making the -5S variant optimal for applications demanding tight luminance consistency across temperature and line voltage.
Availability
AL9910-5S-13 is available at Aetrix Electronics and suitable for LED offline lamps, high-voltage DC-DC LED drivers, and signage lighting requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for AL9910-5S-13 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 high-reliability power management, signal integrity, and LED lighting solutions.
The AL9910/A product line targets cost-sensitive, high-voltage LED lighting applications requiring robust transient immunity, high efficiency, and flexible dimming-designed specifically for non-isolated buck topologies in mains-connected luminaires.
FAQ
What is the maximum allowable input voltage for AL9910-5S-13?
The absolute maximum input voltage is +520 V relative to GND, with recommended continuous operation up to 500 VDC. This rating enables direct connection to rectified 277VAC mains (≈392 VDC peak) plus safety margin for surge transients per IEC 61000-4-5.
Can AL9910-5S-13 operate in constant-off-time (PFM) mode?
Yes-by connecting the ROSC pin to the GATE node instead of GND, the device enters constant-off-time mode. In this configuration, the oscillator period defines tOFF, improving current regulation at light loads and reducing audible noise compared to fixed-frequency PWM.
How does linear dimming via the LD pin interact with the current-sense threshold?
The LD pin voltage (0–250 mV) directly scales the internal CS comparator threshold: at 0 mV, threshold drops to ~45 mV; at 250 mV, it equals the nominal 237.5–262.5 mV. This allows proportional LED current reduction without changing RSENSE, preserving efficiency across dimming range.
Is an external startup resistor required for AL9910-5S-13?
No-its integrated high-voltage LDO eliminates the need for external startup resistors. The device draws only ~0.5 mA quiescent current from VIN during operation, significantly reducing standby power and component count versus legacy controllers requiring high-wattage resistors.
AL9910-5S-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- AC DC Offline Switcher
- Topology:
- Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 15V
- Voltage - Supply (Max):
- 500V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- 25kHz ~ 300kHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight, Lighting, Signage
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
AL9910-5S-13 FAQ
1.How can I place an order for AL9910-5S-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AL9910-5S-13 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 AL9910-5S-13 reliable?
The price and inventory of AL9910-5S-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AL9910-5S-13 is usually 5 days.
3.What payment methods are accepted for AL9910-5S-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AL9910-5S-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AL9910-5S-13?
AL9910-5S-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AL9910-5S-13 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 AL9910-5S-13?
For technical support, including AL9910-5S-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AL9910-5S-13 requirements.
6.How does Aetrix verify that AL9910-5S-13 is sourced from the original manufacturer or authorized distributors?
All AL9910-5S-13 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 AL9910-5S-13 meets industry standards.
7.What is the process for return or replacement of AL9910-5S-13?
All AL9910-5S-13 units undergo pre-shipment inspection (PSI). If there is an issue with AL9910-5S-13, 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 AL9910-5S-13 part is unused and in its original packaging.
Return procedure for AL9910-5S-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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