A8504 View Datasheet(PDF) - Allegro MicroSystems
Part Name
Description
MFG CO.
'A8504' PDF : 18 Pages View PDF
A8504
WLED/RGB Backlight Driver for Medium Size LCDs
VIN
5 V ±10%
CIN
VBAT 24 V
CBAT
VOUT
ROVP COUT
VIN
SW SW OVP
CC
RFSET
RISET
PWM
GND
SKIP
AGND
COMP
FSET
A8504
PGND
SEL3 VIN
SEL2
ISET
LED8
SEL1
LED1
LED7 LED6 LED5 LGND LED4 LED3 LED2
Figure 11. Typical application circuit for PWM dimming, using digital PWM (on the PWM
pin). Showing configuration of 16 WLEDs at 160 mA, in two strings of 8 LEDs each.
VIN
5 V ±10%
VBAT L1
24 V 10 μH
D1
VOUT
CIN
PWM VIN
CBAT
ROVP
COUT
2.2 μF
SW SW OVP
CC
0.1 μF
RFSET
RISET
SKIP
COMP
FSET
A8504
PGND
SEL3
VIN
AGND
GND
ISET
SEL2
SEL1
LED1
LED8 LED7 LED6 LED5 LGND LED4 LED3 LED2
All ESD capacitors across LED arrays are 0.1 μF
Figure 12. Typical application circuit for LED modules with ESD capacitors.
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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