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参数资料
| 型号： | MAX16821CATI+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 17/24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： | 无 |
| 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
High-Side Buck Driver
with Synchronous Rectification
In Figure 9, the input voltage goes from 7V to 28V, the LED
load is connected from the positive side to the current-
sense resistor (R1) in series with the inductor, and MODE
is connected to V CC . For the inner average current-loop
inductor, current is sensed by resistor R1 and is then
transferred to the low side by the high-side current-sense
amplifier, U2. The voltage appearing across resistor R11
becomes the average inductor current-sense voltage for
the inner average current loop. To regulate the LED
current, R2 creates a voltage that the differential ampli-
fier compares to its internal reference. Capacitor C1 is
small and is added to reduce the ripple current in the
LEDs. In cases where the LEDs can tolerate a higher
ripple current, capacitor C1 can be omitted.
V CC
R4
ON/OFF
C3
R3
V IN
14
13
12
11
10
9
8
7V TO 28V
C11
I.C.
OUTV
RT/SYNC
EN
MODE
CLKOUT
SGND
C10
R8
15 OVI
16 CLP
I.C.
N.C. 7
DH 6
C2
Q1
C1
LED
STRING
R7
17 EAOUT
LX 5
L1
C9
C8
R6
18 EAN
MAX16821A
MAX16821B
MAX16821C
BST 4
R5
D1
C4
R1
V CC
RS+
U2
R2
19 DIFF
20 CSN
DL 3
N.C. 2
Q2
RS-
OUT
R11
21 CSP
PGND 1
SGND
22
SENSE-
23
SENSE+
24
SGND
25
IN
26
V CC
27
V DD
28
V IN
C7
C6
C5
Figure 9. Application Circuit for a High-Side Buck LED Driver
______________________________________________________________________________________
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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 |
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