参数资料
型号: MAX16821CATI+
厂商: Maxim Integrated
文件页数: 13/24页
文件大小: 0K
描述: IC LED DRIVR HIGH BRIGHT 28-TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 60
拓扑: 高端,低端,PWM,SEPIC,降压(降压),升压(升压)
输出数: 1
内部驱动器:
类型 - 主要: 车载,背光
类型 - 次要: 高亮度 LED(HBLED)
频率: 125kHz ~ 1.5MHz
电源电压: 4.75 V ~ 5.5 V,7 V ~ 28 V
输出电压: 5.1V
安装类型: 表面贴装
封装/外壳: 28-WFQFN 裸露焊盘
供应商设备封装: 28-TQFN-EP(5x5)
包装: 管件
工作温度: -40°C ~ 125°C
High-Power Synchronous HBLED
Drivers with Rapid Current Pulsing
Applications Information
Boost LED Driver
Figure 5 shows the MAX16821A/MAX16821B/MAX16821C
configured as a synchronous boost converter with
MODE connected to V CC . During the on-time, the input
voltage charges the inductor. During the off-time, the
V CC
inductor discharges to the output. The output voltage
cannot go below the input voltage in this configuration.
Resistor R1 senses the inductor current and resistor R2
senses the LED current. The outer LED current regula-
tion loop programs the average current in the inductor,
thus achieving tight LED current regulation.
V LED
R4
ON/OFF
R9
R10
R3
C3
V IN
7V TO 28V
C2
14
13
12
11
10
9
8
L1
C11
I.C.
OUTV
RT/SYNC
EN
MODE
CLKOUT
SGND
15 OVI
N.C. 7
C10
R8
Q2
V LED
C9
R7
16 CLP
17 EAOUT
DH 6
LX 5
C4
Q1
C8
R5
18 EAN
MAX16821A
MAX16821B
MAX16821C
BST 4
R5
C1
LED
STRING
19 DIFF
DL 3
R2
20 CSN
21 CSP
N.C. 2
PGND 1
D1
R1
SGND
22
SENSE-
23
SENSE+
24
SGND
25
IN
26
V CC
27
V DD
28
V IN
C7
C6
C5
Figure 5. Synchronous Boost LED Driver (Output Voltage Not to Exceed 28V)
______________________________________________________________________________________
13
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相关代理商/技术参数
参数描述
MAX16821CATI+ 功能描述:LED照明驱动器 Synchronous HB w/Rapid Current Puls 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
MAX16821CATI+T 功能描述:LED照明驱动器 Synchronous HB w/Rapid Current Puls 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
MAX16821EVKIT+ 制造商:Maxim Integrated Products 功能描述:HIGH-POWER SYNCHRONOUS HBLED DRIVER - Boxed Product (Development Kits)
MAX16822AASA/V+ 功能描述:LED照明驱动器 2MHz HB w/MOSFET & HSide Crnt Sense 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
MAX16822AASA/V+T 功能描述:LED照明驱动器 2MHz HB w/MOSFET & HSide Crnt Sense 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