A8510 View Datasheet(PDF) - Allegro MicroSystems
Part Name
Description
MFG CO.
'A8510' PDF : 33 Pages View PDF
A8510
Wide Input Voltage Range, High Efficiency
Fault Tolerant LED Driver
VOUT
ILED
C2
C1
C3
COMP
VOUT
ILED
C2
C1
C3
COMP
C4
EN/PWM
t
C4
EN/PWM
t
Figure 12A. Typical PWM diagram showing VOUT, ILED, and COMP pin as
well as the PWM signal. PWM dimming frequency is 200 Hz at 50% duty
cycle; shows VOUT (ch1, 10 V/div.), ILED (ch2, 50 mA/div.), COMP (ch3,
2 V/div.), EN/PWM (ch4, 5 V/div.), t = 1 ms/div.
Figure 12B. Typical PWM diagram showing VOUT, ILED, and COMP pin as
well as the PWM signal. PWM dimming frequency is 200 Hz at 1% duty
cycle ; shows VOUT (ch1, 10 V/div.), ILED (ch2, 50 mA/div.), COMP (ch3,
2 V/div.), EN/PWM (ch4, 5 V/div.), t = 2 ms/div.
EN/PWM
EN/PWM
C1
C1
ILED
ILED
C2
C2
t
t
Figure 12C. Delay from rising edge of PWM signal to LED current; shows
EN/PWM (ch1, 2 V/div.), and ILED (ch2, 20 mA/div.), t = 200 ns/div.
Figure 12D. Delay from falling edge of PWM signal to LED current turn off;
shows EN/PWM (ch1, 2 V/div.), and ILED (ch2, 50 mA/div.), t = 200 ns/div.
Allegro MicroSystems, Inc.
14
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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