参数资料
型号: A8510GECTR-T
厂商: Allegro Microsystems Inc
文件页数: 4/33页
文件大小: 0K
描述: IC LED DRVR BCKLGHT/WHT 26QFN-EC
标准包装: 1
拓扑: PWM,升压(升压)
输出数: 8
内部驱动器:
类型 - 主要: 背光
类型 - 次要: 白色 LED
频率: 600kHz ~ 2.25MHz
电源电压: 5 V ~ 40 V
安装类型: 表面贴装
封装/外壳: 26-WFQFN 裸露焊盘
供应商设备封装: 26-QFN/MLP-EP(4x4)
包装: 标准包装
工作温度: -40°C ~ 105°C
其它名称: 620-1385-6
A8510
Wide Input Voltage Range, High Efficiency
Fault Tolerant LED Driver
Pin-out Diagram
VIN
FAULT
NC
1
2
3
21 PGND
20 PGND
19 VDD
COMP
APWM
EN/PWM
FSET/SYNC
4
5
6
7
PAD
18 LED1
17 LED2
16 LED3
15 LED4
Termina l List Table
Number
1
2
3, 9
4
5
6
7
8
10 to
18
19
20, 21
22
23, 24
25
26
Name
VIN
ˉFˉ ˉA ˉUˉˉLˉ ˉTˉ
NC
COMP
APWM
EN/PWM
FSET/SYNC
ISET
LED8 to
LED1
VDD
PGND
OVP
SW
VGATE
VSENSE
PAD
Function
Input power to the A8510 as well as the positive input used for the current sense resistor.
This pin is used to indicate a fault condition, it is an open drain type configuration that will be pulled
low when a fault occurs; connect a 100 k Ω resistor between this pin and the required logic level
voltage.
No connect.
Output of the error amplifier and compensation node; connect a series R Z C Z network from this pin to
GND for control loop compensation.
Analog trimming option or dimming; applying a digital PWM signal to this pin adjusts the internal I SET
current.
PWM dimming pin used to control the LED intensity by using pulse width modulation, with the typical
PWM dimming frequency is in the range of 200 Hz to 1 kHz; also used to enable the A8510.
Frequency/synchronization pin; connect a resistor R FSET from this pin to GND to set the switching
frequency. This pin can also be used to synchronize two or more converters in the system; the
maximum synchronization frequency is 2.3 MHz.
Connect the R ISET resistor between this pin and GND to set the LED 100% current level.
Connect the cathode of each LED string to these pins.
Output of internal LDO; connect a 0.1 μ F decoupling capacitor between this pin and GND.
Power ground for internal NMOS device.
This pin is used to sense an overvoltage condition; connect the R OVP resistor from V OUT to this pin to
adjust the Overvoltage Protection (OVP) function.
The drain of the internal NMOS switch of the boost converter.
Gate driver pin for external P-MOSFET disconnect switch.
Connect this pin to the negative sense side of the current sense resistor R SC ; the threshold voltage
is measured as V IN – V SENSE .
Exposed pad of the package providing enhanced thermal dissipation; this pad must be connected to
the ground plane(s) of the PCB with at least 8 thermal vias, directly in the pad.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
4
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