AL8863

Document number: DS42198 Rev. 1 - 2

2 of 13

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August 2019

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AL8863

Typical Applications Circuit

AL8863

NTC

DIM

EP

CSN

DRV

VIN

FAULT

GND

OSP

C1

R1

L1

Q1

D1

R2

VIN

R3

R4

Pin Descriptions

Pin Number

Pin Name

Function

1

OSP

Output Shorted Protection

2

DIM

Multi-function On/Off and brightness control pin:



Leave floating for normal operation



Drive to voltage below 0.3V to turn off output current





A PWM signal (Low level <0.3V, High level >2.6V, transition time less than 1µs) allows the output

current to be adjusted over a wide range up to 100%



Connect a capacitor from this pin to ground to increase soft-start time

3

NTC

Connect a NTC resistor to GND to set thermal fold-back break point

4

GND

Ground

5

DRV

Gate Driver

6

VIN

Input voltage (4.5V to 60V). Decouple to ground with 10μF or higher X7R ceramic capacitor close to

device.

7

FAULT

Fault Report Pin. Asserted Low to report faulty conditions. Needs an external pull-up resistor.

8

CSN

Current sense negative input. Connect current sense resistor from VIN to CSN for high-side current

sense control

9

EP

Exposed pad. Connect to GND and thermal mass for enhanced thermal impedance. Should not be used

as electrical ground conduction path.