The AL5802 combines a high gain NPN transistor with a pre-biased NPN transistor to make a simple small footprint LED driver.
The LED current is set by an external resistor connected from REXT pin (6) to GND pin (4). The internal high gain transistor develops approximately 0.6V across the external resistor.
The AL5802’s open-collector output can operate from 0.8V to 30V, making it suitable for industry-standard 5V to 24V power supplies without additional components.
PWM dimming of the LED current can be achieved by either driving the BIAS pin (2) with a low impedance voltage source, or driving the EN pin (3) with an external open-collector NPN transistor or open-drain N-channel MOSFET.
The AL5802 is available in the SOT26 (SC74R) package and is ideal for driving 20mA to 120mA LED currents.
Features:
Reference voltage VRSET = 0.65V
-40 to +125°C temperature range
0.8V to 30V open-collector output
Negative temperature co-efficient automatically reduces the LED current at high temperatures
Low thermal impedance SOT26 with copper lead-frame
Manufacturer | Diodes Incorporated |
---|---|
Category | Lighting |
Sub-Category | LED Drivers - DC In |
Eval Board Part Number | AL5802EV1DI-ND |
Eval Board Supplier | Diodes Incorporated |
Eval Board |
Normally In Stock
|
Voltage In |
4.5 ~ 30 V
|
Topology |
Linear
|
Current Out |
120 mA
|
Voltage Out (Max) |
30 V
|
Outputs and Type |
1 Non-Isolated
|
Efficiency @ Conditions |
- Not Given
|
Features |
PWM Interface
|
Switching Frequency |
- Not Given
|
Component Count + Extras |
6 + 8
|
Design Author |
Diodes/Zetex
|
Application / Target Market |
Lighting: LED Signage
|
Main I.C. Base Part |
AL5802
|
Date Created By Author | 2011-10 |
Date Added To Library | 2024-08 |