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AL8807B (NRND)

NRND = Not Recommended for New Design

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Description

The AL8807B is a step-down DC/DC converter designed to drive LEDs with a constant current. The device can drive up to 9 LEDs, depending on the forward voltage of the LEDs, in series from a voltage source of 6V to 36V. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The AL8807B switches at frequency up to 1MHz with controlled rise and fall times to reduce EMI. This allows the use of small size external components, hence minimizing the PCB area needed.

Maximum output current of AL8807B is set via an external resistor connected between the VIN and SET input pins. Dimming is achieved by applying a PWM signal at the CTRL input pin. An input voltage of 0.4V or lower at CTRL switches off the output MOSFET simplifying PWM dimming.

Feature(s)

LED driving current up to 1.3A
Better than 5% accuracy
High efficiency up to 96%
Optimally controlled switching speeds
Operating input voltage from 6V to 36V
PWM input for dimming control
Open-Circuit LED protection
LED Chain Short Circuited
Over-Temperature Protection
MSOP-8EP 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

Application(s)

MR16 lamps
General illumination lamps
12V powered LED Lamps
24V powered LED Lamps

Product Specifications

Product Parameters

AEC-Q100 Grade	No
Compliance (Only Automotive supports PPAP)	Standard
Dimming (Analog)	No
Dimming (PWM)	Yes
Efficiency (%)	97
LED Current Accuracy (%)	5
MaximumInput Voltage (V)	36
Maximum LED Current (A)	1.3
Maximum Output Voltage (V)	36
MinimumInput Voltage (V)	6
OperatingTemperatureRange (°C)	-40 to 125
AEC Qualified	No
Sense/Feedback Voltage (mV)	100
Switching Frequency Maximum (kHz)	1000
Topologies (Boost)	No
Topologies (Buck-Boost)	No
Topologies (Buck)	Yes

Technical Documents

Recommended Soldering Techniques

TN1.pdf

Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN #	Issue Date	Implementation Date	Subject
PCN-2567	2022-03-30	2022-09-30	Device End of Life (EOL)