A8500EECTR-T Allegro Microsystems Inc, A8500EECTR-T Datasheet - Page 14

• Manufacturer Part Number: A8500EECTR-T
• Description: IC,Laser Diode/LED Driver,LLCC,28PIN,PLASTIC
• Manufacturer: Allegro Microsystems Inc
• Type: Backlight, White LED, RGBr

Specifications of A8500EECTR-T

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 8
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: RGB, White LED
• Frequency: 2MHz
• Voltage - Supply: 4.2 V ~ 5.5 V
• Voltage - Output: 28V
• Mounting Type: Surface Mount
• Package / Case: 26-WFQFN Exposed Pad
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 25mA
• Internal Switch(s): Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Efficiency: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 620-1204-2

A8500
C
0.1 μF
C
Recommended Components Table (for application shown in figure 1)
RFSET
RISET
Component
V
5 V ±10%
IN
Capacitor
Capacitor
Capacitor
Inductor
Resistor
Resistor
Resistor
Diode
IC
Figure 15. Typical application circuit for PWM dimming, using digital PWM (on the
PWM pin, with APWM high). Showing configuration of 16 WLEDs at 100 mA, in two
strings of 8 LEDs each.
COMP
FSET
AGND
ISET
LED8 LED7 LED6 LED5 LGND
PWM
APWM
SKIP
EN
Figure 16. Typical application circuit for LED modules with ESD capacitors.
VIN
C
C
RISET
10 μH
L1
A8500
RFSET
Designator
Reference
C
RFSET
RISET
A8500
ROVP
C
C
IN
V
5 V ±10%
D1
L1
OUT
BAT
IN
, C
SW SW
LED4 LED3 LED2
C
SKIP
COMP
FSET
ISET
LED8
LED7 LED6 LED5 LGND
ROVP
PWM
APWM
EN
C
D1
IN
OVP
PGND
SEL3
SEL2
SEL1
LED1
VIN
COUT
V
0.1 μF / 6.3 V
BAT
60 V / 1.5 A
1 μF / 50 V
1 μF / 50 V
1 μF
V
270 kΩ
5 to 25 V
A8500
IN
Value
10 μH
12 kΩ
24 kΩ
C
Flexible WLED/RGB Backlight Driver
BAT
–
SW SW
LED4 LED3 LED2
ROVP
All ESD capacitors across LED arrays are 0.1 μF
OVP
AGND
PGND
C3216X7R1H105K
C3216X7R1H105K
IR 10MQ060NTRPBF
A8500
SLF6028T-100M1R3-PF
SEL3
SEL2
SEL1
LED1
COUT
Part Number
V
IN
for Medium Size LCDs
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
TDK
TDK
International Rectifier
Allegro MicroSystems
TDK
Vendor
14