A8514KLPTR-T Allegro Microsystems Inc, A8514KLPTR-T Datasheet - Page 12

• Manufacturer Part Number: A8514KLPTR-T
• Description: IC LED DVR WHT 4X80MA 16-ETSSOP
• Manufacturer: Allegro Microsystems Inc

Specifications of A8514KLPTR-T

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

A8514
4A. An LED detect occurring when both LED pins are selected to be used;
shows LED1 (ch1, 500 mV/div.), LED2 (ch2, 500 mV/div.), ISET (ch3,
1 V/div.), and PWM/EN (ch4, 5 V/div.) pins, time = 500 μs/div.
C1
C2
C3
C4
PWM/EN
t
LED1
LED2
ISET
4C. Example with one LED shorted to ground. The IC will not proceed with
power-up until the shorted LED pin is released, at which point the LED is
checked to see if it is being used; shows LED1 (ch1, 500 mV/div.), LED2 (ch2,
500 mV/div.), ISET (ch3, 1 V/div.), and PWM/EN (ch4, 5 V/div.) pins,
time = 1 ms/div.
C1
C2
C3
C4
Pin shorted
LED detection period
Wide Input Voltage Range, High Efficiency
PWM/EN
t
LED1
LED2
ISET
4B. Example with LED2 pin not being used; the detect voltage is
about 150 mV; shows LED1 (ch1, 500 mV/div.), LED2 (ch2, 500 mV/div.),
ISET (ch3, 1 V/div.), and PWM/EN (ch4, 5 V/div.) pins, time = 500 μs/div.
C1
C2
C3
C4
Short removed
Fault Tolerant LED Driver
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
PWM/EN
t
LED1
LED2
ISET
LED detection period
12