参数资料
型号: MAX16821BATI+
厂商: Maxim Integrated
文件页数: 16/24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
Low-Side Buck Driver
with Synchronous Rectification
In Figure 8, the input voltage goes from 7V to 28V and,
because of the ground-based current-sense resistor,
the output voltage can be as high as the input. The syn-
chronous MOSFET keeps the power dissipation to a
minimum, especially when the input voltage is large
compared to the voltage on the LED string. For the
V CC
inner average current-loop inductor, current is sensed
by resistor R1. To regulate the LED current, R2 creates
a voltage that the differential amplifier compares to
0.6V. Capacitor C1 is small and helps reduce the ripple
current in the LEDs. Omit C1 in cases where the LEDs
can tolerate a higher ripple current. The average current-
mode control scheme converts the input voltage to a
current source feeding the LED string.
V LED
R9
R3
C3
R4
ON/OFF
R10
C11
14
I.C.
13
OUTV
12
RT/SYNC
11
EN
10
MODE
9
CLKOUT
8
SGND
V IN
7V TO 28V
C10
R9
15 OVI
16 CLP
N.C. 7
DH 6
Q1
C2
R7
17 EAOUT
LX 5
L1
V LED
C9
C8
18 EAN
MAX16821A
MAX16821B
BST 4
R5
C4
LED
STRING
R6
MAX16821C
19 DIFF
20 CSN
DL 3
N.C. 2
D2
Q2
C1
R2
R1
21 CSP
PGND 1
SGND
22
SENSE-
23
SENSE+
24
SGND
25
IN
26
V CC
27
V DD
28
V IN
Figure 8. Application Circuit for a Low-Side Buck LED Driver
C7
C6
C5
16
______________________________________________________________________________________
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相关代理商/技术参数
参数描述
MAX16821BATI+ 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
MAX16821BATI+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
MAX16821BATI+TW 功能描述:LED照明驱动器 High-Power Synchronous HBLED Drivers with Rapid Current Pulsing 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
MAX16821BATI+W 功能描述:LED照明驱动器 High-Power Synchronous HB LED Drivers with Rapid Current Pulsing 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
MAX16821BEVKIT+ 功能描述:LED 照明开发工具 MAX16821B Eval Kit RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: