30V Adjustable Current Sink Linear LED Driver
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The AL5802LPL combines a high-gain NPN transistor with a prebiased NPN transistor to make a simple, small footprint LED driver.
The LED current is set by an external resistor connected from the REXT Pin (4) to the GND Pin (6), and the internal high gain transistor develops approximately 0.6V across the external resistor.
The AL5802LPL’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 (1) with a low impedance voltage source, or driving the EN Pin (5) with an external open-collector NPN transistor or open-drain N-Channel MOSFET.
The AL5802LPL is available in a U-DFN3030-6 (Type B) package and is ideal for driving 10mA to 120mA LED currents.
Accuracy (%) |
N/A |
|---|---|
BVCBO (V) Min @ Ic=50µA, IE=0µA |
30 |
BVCEO (V) Min @ Ic=1.0mA, IB=0 |
40 |
BVEBO (V) Min @ Ie=10µA, IC=0 |
6 |
BVEBO (V) Min @ Ie=50µA, IC=0µA |
5 |
Dimming |
PWM |
Efficiency (%) |
N/A |
ESD Diodes (Y|N) |
N |
Frequency (kHz) |
N/A |
hFE Min @ IC=100µA, VCE=10V |
NA |
hFE Min @ IC=10mA, VCE=10V |
100 |
hFE Min @ IC=150mA, VCE=50V |
100 |
hFE Min @ IC=1mA, VCE=10V |
70 |
IBL (nA) Max @ VCE=30V, VBE(Off)=30V |
50 |
ICBO (µA) Max @ VCB=30V, IE=0µA |
0.5 |
ICEX (nA) Max @ VCE=30V, VBE(Off)=30V |
50 |
IEBO (µA) Max @ VEB=4V, IC=0µA |
0.5 |
LED Current (A) |
150 |
LED Current Sense Voltage (mV) |
650 |
Maximum Supply Voltage (V) |
30 |
Maximum VOUT (V) |
30 |
Minimum Supply Voltage (V) |
4.5 |
Polarity |
NPN, NPN Pre-Biased |
Temperature Range (°C) |
-40 to 125 |
Topology |
Linear LED Driver |
VBE(on) (V) Max @ IC=2mA, VCE=15V |
1.1 |
VBE(on) (V) Max @ IC=2mA, VCE=5V |
1.1 |
VBE(on) (V) Min @ IC =2mA, VCE=15V |
0.3 |
VBE(on) (V) Min @ IC=2mA, VCE=5V |
0.3 |
VBE(sat) (V) Max @ IC=10mA, IB=10mA |
0.85 |
VBE(sat) (V) Min @ IC=10m A, IB=10mA |
0.65 |
VCE(sat) (V) Max @ IC=10mA, IB=10mA |
0.2 |
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