PMIC - LED Drivers SC-74A, SOT-753 -40°C~125°C TJ 12V AL8805 DIODES INC. AL8805W5-7 Led Driver, 1 Output, Buck (Step Down), 6V-36V in, 1MHz switch,1A out, SOT-25-5
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Dec 4, 2021
Magee Hodge
How To Choose The Correct LED Driver For Your LED Lights
PMIC - LED Drivers SC-74A, SOT-753 -40°C~125°C TJ 12V AL8805 DIODES INC. AL8805W5-7 Led Driver, 1 Output, Buck (Step Down), 6V-36V in, 1MHz switch,1A out, SOT-25-5
The AL8805W5-7 is a constant current step-down DC/DC converter designed to drive LEDs. This article mainly introduces Circuit, Pinout, Datasheet and other detailed information about Diodes Incorporated AL8805W5-7.
AL8805W5-7
| Quantity | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.26171 | $0.26 |
| 10+ | $0.24689 | $2.47 |
| 100+ | $0.23292 | $23.29 |
| 500+ | $0.21973 | $109.87 |
| 1000+ | $0.2073 | $207.3 |
The AL8805W5-7 is a constant current step-down DC/DC converter designed to drive LEDs. Depending on the forward voltage of the LEDs. The device can drive up to 8 LEDs in series from a power source of 6V to 36V. The LEDs are connected in series, resulting in identical LED currents, consistent brightness, and the elimination of ballast resistors. The AL8805 can switch at up to 1MHz in frequency. This enables for the use of small external components, reducing the amount of PCB space required.
An extra resistor attached between the VIN and SET input pins controls the maximum output current of the AL8805W5-7. The CTRL input pin is used to dim the light by adding a DC voltage or a PWM signal. PWM dimming is made easier with an input voltage of 0.4V or lower at CTRL, which turns off the output MOSFET.
The AL8805W5-7 Pinout is shown as follows.
Pinout
| Pin Number | Pin Name | Description |
| 1 | SW | Switch Pin. Connect inductor/freewheeling diode here, minimizing track length at this pin to reduce EMI. |
| 2 | GND | GND Pin |
| 3 | CTRL | Dimming and On/Off Control Input. • Leave floating for normal operation. (VCTRL = VREF = 2.5V giving nominal average output current IOUTnom = 0.1/RS) • Drive to voltage below 0.4V to turn off output current • Drive with DC voltage (0.5V < VCTRL < 2.5V) to adjust output current from 20% to 100% of IOUTnom • A PWM signal (low level ≤ 0.4V and high level > 2.6; transition times less than 1us) allows the output current to be adjusted below the level set by the resistor connected to SET input pin. |
| 4 | SET | Set Nominal Output Current Pin. Configure the output current of the device. |
| 5 | VIN | Input Supply Pin. Must be locally decoupled to GND with > 2.2µF X7R ceramic capacitor – see applications section for more information. |
The followings are AL8805W5-7 Symbol, Footprint and 3D Model.
Symbol
Footprint
3D Model
• LED Driving Current up to 1A
• Better than 5% Accuracy
• High Efficiency up to 98%
• Operating Input Voltage from 6V to 36V
• High Switching Frequency up to 1MHz
• PWM/DC Input for Dimming Control
• Built-In Output Open-Circuit Protection
• SOT25: Available in “Green” Molding Compound (No Br, Sb) with lead-Free Finish/ RoHS Compliant
-Totally Lead-Free & Fully RoHS Compliant
-Halogen and Antimony Free. “Green” Device
Diodes Incorporated AL8805W5-7 technical specifications, attributes, parameters and parts with similar specifications to Diodes Incorporated AL8805W5-7.
Diodes Incorporated AL8805W5-7 technical specifications, attributes, parameters and parts with similar specifications to Diodes Incorporated AL8805W5-7.
| Product Attribute | Attribute Value | |
|---|---|---|
| Factory Lead Time | 21 Weeks | |
| Contact Plating | Tin | |
| Mount | Surface Mount | |
| Mounting Type | Surface Mount | |
| Package / Case | SC-74A, SOT-753 | |
| Number of Pins | 5Pins | |
| SwitchingFrequency | 1MHz | |
| Operating Temperature | -40°C~125°C TJ | |
| Packaging | Tape & Reel (TR) | |
| Published | 2011 | |
| JESD-609 Code | e3 | |
| Pbfree Code | yes | |
| Part Status | Active | |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | |
| Number of Terminations | 5Terminations | |
| ECCN Code | EAR99 |
| Product Attribute | Attribute Value | |
|---|---|---|
| Type | DC DC Regulator | |
| Terminal Position | DUAL | |
| Terminal Form | GULL WING | |
| Peak Reflow Temperature (Cel) | 260 | |
| Number of Functions | 1Function | |
| Supply Voltage | 12V | |
| Time@Peak Reflow Temperature-Max (s) | 40 | |
| Base Part Number | AL8805 | |
| Pin Count | 5 | |
| Number of Outputs | 1Output | |
| Output Voltage | 30V | |
| Max Supply Voltage | 30V | |
| Min Supply Voltage | 6V | |
| Nominal Supply Current | 5μA | |
| Output Current | 1A | |
| Max Supply Current | 1A |
| Product Attribute | Attribute Value | |
|---|---|---|
| Topology | Step-Down (Buck) | |
| Min Input Voltage | 6V | |
| Max Input Voltage | 36V | |
| Output Current per Channel | 1A | |
| Internal Switch(s) | Yes | |
| Dimming | Analog, PWM | |
| Number of Segments | 8Segments | |
| Multiplexed Display Capability | NO | |
| Height | 1.1mm | |
| Length | 3mm | |
| Width | 1.6mm | |
| REACH SVHC | No SVHC | |
| Radiation Hardening | No | |
| RoHS Status | ROHS3 Compliant | |
| Lead Free | Lead Free |
The following figure is AL8805W5-7 Ordering Information.
Ordering Information
| Device | Package Code | Packaging | 7” Tape and Reel | |
| Quantity | Part Number Suffix | |||
| AL8805W5-7 | W5 | SOT25 | 3000/Tape & Reel | -7 |
The following figure is AL8805W5-7 Typical Applications Circuit.
Typical Applications Circuit
The LED current is controlled by the resistor R1 in the figure as follows.
Connected between VIN and SET the nominal average output current in the LED(s) is defined as:
ILED=VTHD/RSET
If the CTRL pin is driven by an external voltage (higher than 0.4V and lower than 2.5V), the average LED current is:
ILED=VCTRL/VREF • VTHD/RSET
For example for a desired LED current of 660mA and a default voltage VCTRL=2.5V the resulting resistor is:
RSET=VTHD/ILED • VCTRL/VREF=0.1/0.66 • 2.5/2.5≈150mΩ
LED Current Control
| Part Number | Description | Manufacturer |
| TPS92023DRDRIVERS AND INTERFACES | Resonant-Switching Driver Controller for LED Lighting 8-SOIC -40 to 125 | Texas Instruments |
| TPS92023DDRIVERS AND INTERFACES | Resonant-Switching Driver Controller for LED Lighting 8-SOIC -40 to 125 | Texas Instruments |
• MR16 Lamps
• General Illumination Lamps
The AL8805W5-7 Package is shown as follows.
Package
Diodes Incorporated manufactures high-quality semiconductors for the consumer electronics, computing, communications, industrial, and automotive industries. To suit clients' needs, they use their enlarged product line of discrete, analog, and mixed-signal components, as well as cutting-edge packaging technologies. We can be a premier provider for high-volume, high-growth markets because of our comprehensive range of application-specific solutions and solutions-focused sales, as well as our global operations of 25 facilities, which include engineering, testing, production, and customer service.
Download datasheets and manufacturer documentation for AL8805W5-7
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