参数资料
| 型号： | A4447SLJTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 2A 8SOIC |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 24 V |
| 输入电压： | 8 V ~ 50 V |
| PWM 型： | 电流模式 |
| 电流 - 输出： | 2A |
| 同步整流器： | 无 |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm Width）裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 8-SOIC-EP |
| 产品目录页面： | 1141 (CN2011-ZH PDF) |
| 其它名称： | 620-1329-6 |
A4447
High Voltage Step Down Regulator
Features and Benefits
Description
?
?
?
?
?
?
?
Wide input voltage range: 8 to 50 V
Integrated low R DS(on) DMOS switch
2 A continuous output current
Adjustable fixed off-time
Highly efficient
Adjustable output: 0.8 to 24 V
Small package with exposed thermal pad
The A4447 is a 2 A, high efficiency general-purpose buck
regulator designed for a wide variety of applications. The output
voltage is adjustable from 0.8 to 24 V, based on a resistor divider
and the 0.8 V ± 2 % reference. External components include
an external clamping diode, inductor, and filter capacitor.
The off-time is determined by an external resistor to ground.
It operates in both continuous and discontinuous modes to
maintain light load regulation. An internal blanking circuit is
used to filter out transients due to the reverse recovery of the
external clamp diode. Typical blanking time is 200 ns.
This new device is ideal for various end products including
applications with 8 to 50 V input voltage range and require up
to 2 A output current, such as uninterruptible power supplies,
Package: 8 pin SOIC with exposed thermal
pad (suffix LJ)
point of sale (POS) applications, and industrial applications
with 24 or 36 V bus.
Applications include:
? Printer power supplies
? Office automation equipment
? POS thermal, laser, photo, and inkjet printers
? Tape drives
? Industrial applications
Approximate Scale 1:1
Typical Application
+42 V
CBOOT
0.01 μ F
Efficiency vs. Output Current
CIN2
CIN1
0.22 μ F
90
5
BOOT
VIN
D1
85
80
3.3
ENB
TSET
A4447
LX
VBIAS
L1
V OUT
3.3 V
2A
75
70
1.8
RTSET
54 k
GND
FB
R1
2.87 k
ESR
65
1.5
V OUT (V)
R 3 A
10 k
R2
910
C BYP
0.22 μ F
COUT
220 μ F
25 V
60
0
500
1000
1500
2000
A R3 required when C BYP connected
I OUT (mA)
Data is for reference only. Efficiency data from circuit shown in left panel.
A4447-DS, Rev. 2
相关PDF资料 |
PDF描述 |
|---|---|
| A4490EES-T | IC REG BUCK ADJ 1.5A TRPL 20QFN |
| A4491EESTR-T | IC REG BUCK ADJ 2.2A TRPL 20QFN |
| A4931MET-T | IC DC MOTOR PREDRIVER 3PH 28QFN |
| A4934GLPTR-T | IC BLDC DVR 3PHASE 16-ETSSOP |
| A4936METTR-T | IC DC MOTOR PREDRIVER 3PH 32QFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| A4448RT | 制造商:Pentair Technical Products / Hoffman 功能描述:Wiring Trough 4.00x4.00x48.00 , 4.00x4.00x48.00, Steel |
| A-4448RT | 制造商:Pentair Technical Products / Hoffman 功能描述:Wiring Trough 4.00x4.00x48.00 |
| A4448T1T | 制造商:Pentair Technical Products / Hoffman 功能描述:4X4, 48 LONG TYPE 1 TROUGH Gray, 4.00x4.00x48.00, Steel |
| A445 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:DISPLAY 0-20 OR 24MA |
| A4450KESTR-J | 功能描述:Buck-Boost Regulator Positive Output Step-Up/Step-Down DC-DC Controller IC 20-QFN (4x4) 制造商:allegro microsystems, llc 系列:汽车级，AEC-Q100 包装:剪切带（CT） 零件状态:新产品 输出类型:晶体管驱动器 功能:升压/降压 输出配置:正 拓扑:降压-升压 输出数:1 输出阶段:1 电压 - 电源（Vcc/Vdd）:3 V ~ 36 V 频率 - 开关:250kHz ~ 2.2MHz 占空比（最大）:- 同步整流器:无 时钟同步:是 串行接口:- 控制特性:使能，频率控制，软启动 工作温度:-40°C ~ 150°C（TJ） 封装/外壳:20-WFQFN 裸露焊盘 供应商器件封装:20-QFN（4x4） 标准包装:1 |
发布紧急采购，3分钟左右您将得到回复。