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| 型号： | MAX1847EEE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 17/20页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR FLYBK INV CM 16QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 345kHz |
| 占空比： | 98% |
| 电源电压： | 3 V ~ 16.5 V |
| 降压： | 无 |
| 升压： | 无 |
| 回扫： | 是 |
| 反相： | 是 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
High-Efficiency, Current-Mode,
Inverting PWM Controller
as the output capacitor (C OUT ). Under ideal conditions,
the RMS current for the input capacitor is the same as the
output capacitor. The capacitor value and ESR must be
selected to reduce noise to an acceptable value and also
handle the ripple current (I NRMS ) where:
as close together as possible, keeping their traces short,
direct, and wide. Avoid interconnecting the ground pins
of the power components using vias through an internal
ground plane. Instead, keep the power components
close together and route them in a “star” ground configu-
ration using component-side copper, then connect the
I NRMS =
( I
1 . 2 x I O
? D MAX )
x D MAX
?
D MAX
2
star ground to internal ground using multiple vias.
Main Application Circuits
Bypass Capacitor
In addition to C IN and C OUT , other ceramic bypass
capacitors are required with the MAX1846/MAX1847.
Bypass REF to GND with a 0.1μF or larger capacitor.
Bypass V L to GND with a 0.47μF or larger capacitor. All
bypass capacitors should be located as close to their
respective pins as possible.
PC Board Layout Guidelines
Good PC board layout and routing are required in high-
frequency-switching power supplies to achieve good reg-
ulation, high efficiency, and stability. It is strongly
recommended that the evaluation kit PC board layouts be
followed as closely as possible. Place power components
V IN
The MAX1846/MAX1847 are extremely versatile devices.
Figure 2 shows a generic schematic of the MAX1846.
Table 1 lists component values for several typical appli-
cations. These component values also apply to the
MAX1847. The first two applications are featured in the
MAX1846/MAX1847 EV kit.
APPLICATION B
ONLY
C IN
22k
P
D1
0.47 μ F
1
VL
10
IN
V OUT
EXT
CS
9
8
L1
C OUT
MAX1846
C COMP2
C COMP
R COMP
R FREQ
3
2
4
COMP
FREQ
REF
PGND
FB
GND
7
5
R CS
R1
R2
6
C FB
0.1 μ F
NOTE: APPLICATIONS A & B USE POS CAPACITORS. APPLICATIONS C & D USE ALUMINUM ELECTROLYTIC CAPACITORS.
Figure 2. MAX1846 Main Application Circuit
______________________________________________________________________________________
17
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1848EKA | 制造商:Maxim Integrated Products 功能描述:HIGH-EFFICIENCY UNIFORM-BRIGHTNESS - Rail/Tube |
| MAX1848EKA-T | 功能描述:LED照明驱动器 White LED Step-Up RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MAX1848ETA | 制造商:Maxim Integrated Products 功能描述:HIGH-EFFICIENCY, UNIFORM-BRIGHTNESS, WHITE LE - Rail/Tube |
| MAX1848ETA+ | 制造商:Maxim Integrated Products 功能描述:LED DRVR 3SEGMENT 2.6V TO 5.5V 8PIN SOT-23 - Rail/Tube |
| MAX1848ETA+T | 功能描述:LED照明驱动器 White LED Step-Up RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
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