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参数资料
| 型号： | A6210GEUTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER HIGH BRIGHT 16-QFN |
| 特色产品： | A6210 Buck-Regulating LED Driver |
| 标准包装： | 1 |
| 拓扑： | PWM，降压（降压），切换式电容器（充电泵） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 通用 |
| 类型 - 次要： | 高亮度 LED（HBLED） |
| 频率： | 2MHz |
| 电源电压： | 9 V ~ 46 V |
| 输出电压： | 46V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WSQFN 裸露焊盘 |
| 供应商设备封装： | 16-QFN-EP（4x4） |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 105°C |
| 产品目录页面： | 1141 (CN2011-ZH PDF) |
| 其它名称： | 620-1281-6 |
A6210
3 A, 2 MHz Buck-Regulating LED Driver
Features and Benefits
? User-configurable on-time, achieving switching
frequencies up to 2.0 MHz
? Brightness control through PWM of DIS pin
? Minimal external components required
? No output capacitor required
? Wide input voltage range: 9 to 46 V
? Low 0.18 V sense voltage for higher efficiency
? Output Current: up to 3.0 A
? Low standby current <100 μ A
? Thermal shutdown
? Supplied in a thermally-enhanced 4 mm QFN package
Applications:
? High brightness LEDs
? LED driver modules, power supplies and lamps, such as
MR16 and MR11
Package 16-contact QFN (suffix EU):
4 mm × 4 mm × 0.75 mm
Description
The A6210 is a buck regulator that uses valley current-mode
control. This control scheme allows very short switch on-times
to be achieved, making it ideal for applications that require
high switching frequencies combined with high input voltages
and low output LED span voltages.
Low system cost is accomplished through high switching
frequencies of up to 2.0 MHz, allowing smaller and lower value
inductors and capacitors. In addition, few external components
are required through high levels of integration. Optimal drive
circuits minimize switching losses.
The switching frequency is maintained constant, as the on-time
is modulated by the input voltage. This feed-forward control
ensures excellent line correction. The on-time is set by an
external resistor pulled-up to the input supply.
Internal housekeeping and bootstrap supplies are provided
which require the addition of only one small ceramic capacitor. A
top-off charge pump ensures correct operation at light loads.
Internal diagnostics provide comprehensive protection against
input undervoltages and overtemperatures.
The device package is a 16-contact, 4 mm × 4 mm, 0.75 mm
nominal overall height QFN, with exposed pad for enhanced
thermal dissipation. It is lead (Pb) free, with 100% matte tin
leadframe plating.
Typical Application
V IN
24 V
R1
150 k Ω
C1
1.0 μ F
VIN
TON
A 6210
BOOT
LX
ISEN
C2
22 nF
D1
L 1
68 μ H
LED1
LED2
PWM or Switch
DIS
LED span voltage = 10.5 V
Average LED current = 500 mA
NC
GND
SGND
Suggested Parts
R2
390 m Ω
LED3
Peak to peak current = 60 mA
Switching frequency = 1.4 MHz
Efficiency = 90.5%
Name
C1
C2
D1
L1
R1
R2
Description
1 μ F, 25V, X5R or X7R ceramic, 1210
22 nF, 50V, X5R or X7R ceramic, 0805
1 A, 30 V, Schottky diode
68 μ H, 1 A inductor
180 k Ω , 1%, 0805
390 m Ω , 1%, 0805
Manufacturer - Part Number
Taiyo Yuden, TDK
Taiyo Yuden - NR 6045T 680M
6210-DS, Rev. 2
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