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参数资料
| 型号： | A8515GLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 3/34页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR WHT/RGB BKLGT 16TSSOP |
| 标准包装： | 8,000 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 2 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 600kHz ~ 2.5MHz |
| 电源电压： | 5 V ~ 40 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 16-TSSOP-EP |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 105°C |
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A8515
Wide Input Voltage Range, High Efficiency
Fault Tolerant LED Driver
Pin-out Diagram
VDD 1
PGND 2
OVP 3
16 LED2
15 LED1
14 AGND
Terminal List Table
SW 4
GATE 5
VSENSE 6
VIN 7
FAULT 8
PAD
13 ISET
12 FSET/SYNC
11 EN/PWM
10 APWM
9 COMP
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
–
Name
VDD
PGND
OVP
SW
GATE
VSENSE
VIN
ˉFˉ ˉA ˉUˉˉLˉ ˉTˉ
COMP
APWM
EN/PWM
FSET/SYNC
ISET
AGND
LED1
LED2
PAD
Function
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 function (OVP).
The drain of the internal NMOS switch of the boost converter.
Output gate driver pin for external P-channel FET control.
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 .
Input power to the A8515 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.
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; the typical
PWM dimming frequency is in the range of 200 Hz to 1 kHz.
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.
LED signal ground.
Connect the cathode of the LED string to this pin.
Connect the cathode of the LED string to this pin.
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
3
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