参数资料
型号: MAX16821AATI+
厂商: Maxim Integrated
文件页数: 14/24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
Input-Referenced Buck-Boost LED Driver
The circuit in Figure 6 shows a step-up/step-down reg-
ulator. It is similar to the boost converter in Figure 5 in
that the inductor is connected to the input and the
MOSFET is essentially connected to ground. However,
rather than going from the output to ground, the LEDs
V CC
span from the output to the input. This effectively
removes the boost-only restriction of the regulator in
Figure 5, allowing the voltage across the LED to be
greater or less than the input voltage. LED current-
sensing is not ground-referenced, so a high-side cur-
rent-sense amplifier is used to measure current.
V LED
R4
ON/OFF
R8
R3
C3
V IN
7V TO 28V
R2
LED
STRING
1 TO 6
R9
14
13
12
11
10
9
8
L1
C2
C2
LEDS
C11
I.C.
OUTV
RT/SYNC
EN
MODE
CLKOUT
SGND
D1
15 OVI
N.C. 7
V LED
C10
R7
Q1
R6
16 CLP
DH 6
V CC
C9
17 EAOUT
LX 5
C1
RS+
C8
18 EAN
MAX16821A
MAX16821B
BST 4
RS-
OUT
R5
19 DIFF
MAX16821C
DL 3
20 CSN
21 CSP
N.C. 2
PGND 1
R1
SGND
22
SENSE-
23
SENSE+
24
SGND
25
IN
26
V CC
27
V DD
28
V IN
C7
C6
C5
Figure 6. Typical Application Circuit for an Input-Referred Buck-Boost LED Driver (7V to 28V Input)
14
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相关代理商/技术参数
参数描述
MAX16821AATI+ 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
MAX16821AATI+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+ 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