- 您现在的位置：买卖IC网 > Datasheet目录307 > A8511KLPTR-T (Allegro Microsystems Inc)IC LED DVR 150MA AUTO 28-TSSOP Datasheet资料下载
参数资料
| 型号： | A8511KLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR 150MA AUTO 28-TSSOP |
| 标准包装： | 1 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 4 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 车载，背光 |
| 类型 - 次要： | 高亮度 LED（HBLED），RGB，白色 LED |
| 频率： | 600kHz ~ 2.1MHz |
| 电源电压： | 8 V ~ 21 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.173"，4.40mm 宽）裸露焊盘 |
| 供应商设备封装： | 28-TSSOP 裸露焊盘 |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 125°C |
| 其它名称： | 620-1367-6 |
A8511
2 MHz, 4 Channel × 150 mA WLED/RGB Driver
With Output Disconnect
Features and Benefits
? Four LED sinks rated for 150 mA each (600 mA total)
? Boost converter with integrated 40 V DMOS switch and
OVP–load-dump protection
? 600 kHz to 2.2 MHz switching frequency—ability to
operate above the AM band
? Internal bias supply for single-supply operation (V IN = 6.8 to 21V)
? 3.5 μ A shutdown current—limits battery drain
? Active current sharing between LED strings for
0.8% current matching and 0.7% accuracy
? PWM dimming with LED PWM duty cycle control
? 4000:1 dimming range
? Extensive fault mode protection schemes:
? Shorted LED protection against misconnected loads—
with true output disconnect
? Open LED disconnect protects against LED failures
? External thermistor sensing to limit LED temperature
? Output overvoltage protection (OVP): 19.5 V default can
be adjusted as high as 38 V
? Open Schottky and open OVP resistor protection against
external component failure
? Input under- and overvoltage protection (UVLO and
OVLO) against V IN variation
? Boost current limit, output short circuit limit,
overtemperature protection (OTP), and soft start
Package:
28-pin TSSOP with
exposed thermal pad
(package LP)
Not to scale
Description
The A8511 is a multioutput WLED/RGB driver for backlight-
ing medium-size displays. It is a fully integrated high-brightness
(HB) LED driver solution that does not require external power
devices to complete the backlighting design criteria. The A8511
integrates FETs for a boost converter as well as four 150 mA
current sinks, offering a complete integrated solution at HB
LED current levels. LED channels can be tied together for up to
600 mA sink capability. It can work from a single power supply
of 6.8 to 21 V and withstand up to 40 V. The boost converter
is a constant frequency, current-mode converter.
Operating frequency can be set to 2 MHz avoiding interference
with the AM radio band. The integrated boost DMOS switch is
rated for 40 V at 3.6 A. PWM dimming allows LED currents
to be controlled up to a 1000:1 ratio. Additional 4:1 dimming
can be achieved by using the DIM pin.
The A8511 provides protection against output connector shorts
through an integrated output disconnect switch. An optional
external thermistor can be used to limit LED current based on
panel temperature.
The device is supplied in a surface mount, 28-pin TSSOP
package (suffix LP), with exposed thermal pad for enhanced
thermal dissipation. It is lead (Pb) free, with 100% matte-tin
leadframe plating.
Applications include:
? GPS navigation systems
? Automotive infotainment
? Back-up camera displays
? Cluster backlighting
? Portable DVD players
? Industrial LCD displays
Typical Application
Figure 1. LCD monitor backlight driving
V BAT
CBAT
4.7 μ F
35 V
CIN
VIN
L1
10 μ H
D1
ROVP
78.7 k Ω
SW SW SW OVP CAP
COUT
4.7 μ F
50 V
4 LED strings. On/off and dimming
EN
OUT
control using ENABLE pin.
? Current = 50 mA per string
? OVP = 35 V nominal
? Switching frequency = 2 MHz
A8511
CCOMP
1 μ F
10 V
CBIAS
0.1 μ F
10 V
COMP
DIM
BIAS
SEL2
SEL1
A8511
PAD
FSET
NC
LED1
RFSET
25.5 k Ω
RVC
VTO
VTO
VTI
LED2
LED3
–t°
8511-DS
VTI
NTC
Optional Configuration
for Thermal Derating
RISET
24.3 k Ω
ISET LED4
AGND PGND PGND PGND LGND DGND
相关PDF资料 |
PDF描述 |
|---|---|
| A8512ELBTR-T | IC LED DVR WHT/RGB BKLGT 24SOIC |
| A8513KLPTR-T | IC LED DRVR AUTO BCKLGHT 16TSSOP |
| A8514KLPTR-T | IC LED DVR WHT 4X80MA 16-ETSSOP |
| A8515GLPTR-T | IC LED DVR WHT/RGB BKLGT 16TSSOP |
| A8516ELPTR-T | IC LED DVR BACKLIGHT MON 24TSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| A8512 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:LED Backlight Driver for Medium/Large Displays |
| A8512EETTR-T | 功能描述:IC LED DVR WHT/RGB BKLGT 28QFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 恒定电流:- 恒定电压:- 拓扑:升压（升压），切换式电容器（充电泵） 输出数:1 内部驱动器:是 类型 - 主要:背光 类型 - 次要:白色 LED 频率:625kHz ~ 875kHz 电源电压:2.7 V ~ 5.3 V 输出电压:5V 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-µMAX 包装:带卷 (TR) 工作温度:-40°C ~ 85°C |
| A8512ELBTR-T | 功能描述:IC LED DVR WHT/RGB BKLGT 24SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 恒定电流:- 恒定电压:- 拓扑:升压（升压），切换式电容器（充电泵） 输出数:1 内部驱动器:是 类型 - 主要:背光 类型 - 次要:白色 LED 频率:625kHz ~ 875kHz 电源电压:2.7 V ~ 5.3 V 输出电压:5V 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-µMAX 包装:带卷 (TR) 工作温度:-40°C ~ 85°C |
| A8512ELPTR-T | 功能描述:IC LED DVR WHT/RGB BKLGT 24TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 恒定电流:- 恒定电压:- 拓扑:升压（升压），切换式电容器（充电泵） 输出数:1 内部驱动器:是 类型 - 主要:背光 类型 - 次要:白色 LED 频率:625kHz ~ 875kHz 电源电压:2.7 V ~ 5.3 V 输出电压:5V 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-µMAX 包装:带卷 (TR) 工作温度:-40°C ~ 85°C |
| A8513 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Wide Input Voltage Range, High Efficiency Fault Tolerant LED Driver |
发布紧急采购，3分钟左右您将得到回复。