- 您现在的位置：买卖IC网 > PDF目录20718 > MAX16812ATI+T (Maxim Integrated)IC LED DRIVR HIGH BRIGHT 28-TQFN PDF资料下载
参数资料
| 型号： | MAX16812ATI+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 15/21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： | 2,500 |
| 恒定电流： | 是 |
| 拓扑： | PWM，SEPIC，降压（降压），升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 车载 |
| 类型 - 次要： | 高亮度 LED（HBLED） |
| 频率： | 125kHz ~ 500kHz |
| 电源电压： | 5.5 V ~ 76 V |
| 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： | 带卷 (TR) |
| 工作温度： | -40°C ~ 125°C |
Integrated High-Voltage LED Driver
with Analog and PWM Dimming Control
V IN
100k Ω
GND
GND
MAX6501
TOVER
5.1V
ZENER
TO EN PIN OF
MAX16812
TO L_REG PIN
OF MAX16812
V CC
4.7 μ F
Figure 12. Dimming MOSFET Protection
V INMIN x ( V OUT ? V INMIN )
x Δ I
Inductor Selection
The minimum required inductance is a function of the
operating frequency, the input-to-output voltage differ-
ential and the peak-to-peak inductor current ( Δ I L ).
Higher Δ I L allows for a lower inductor value while a
lower Δ I L requires a higher inductor value. A lower
inductor value minimizes size and cost, improves large-
signal transient response, but reduces efficiency due to
higher peak currents and higher peak-to-peak output
ripple voltage for the same output capacitor. On the
other hand, higher inductance increases efficiency by
reducing the ripple current, Δ I L . However, resistive
losses due to the extra turns can exceed the benefit
gained from lower ripple current levels, especially when
the inductance is increased without allowing for larger
inductor dimensions. A good compromise is to choose
Δ I L equal to 30% of the full load current. The inductor
saturating current specification is also important to
avoid runaway current during output overload and con-
tinuous short-circuit conditions.
where V INMAX is the maximum input voltage, f SW is the
switching frequency, and V OUT is the output voltage.
Boost Configuration: In the boost converter, the aver-
age inductor current varies with the input voltage and
the maximum average current occurs at the lowest
input voltage. For the boost converter, the average
inductor current is equal to the input current. In this
case, the inductance, L, is calculated as:
L =
V O UT x f SW L
where V INMIN is the minimum input voltage, V OUT is the
output voltage, and f SW is the switching frequency. See
Figure 14.
Buck-Boost Configuration: In a buck-boost converter
(see the Typical Application Circuit ), the average
inductor current is equal to the sum of the input current
and the LED current. In this case, the inductance, L, is:
Buck Configuration: In a buck configuration (Figure
13), the average inductor current does not vary with the
input. The worst-case peak current occurs at the high-
est input voltage. In this case, the inductance, L, for
L =
V OUT xV INMIN
( V OUT + V INMIN ) x f SW x Δ I L
continuous conduction mode is given by:
where V INMIN is the minimum input voltage, V OUT is the
L =
V OUT x ( V INMAX ? V OUT )
V INMAX x f SW x Δ I L
output voltage, and f SW is the switching frequency.
______________________________________________________________________________________
15
相关PDF资料 |
PDF描述 |
|---|---|
| VE-J23-CX-F1 | CONVERTER MOD DC/DC 24V 75W |
| NCV4276DT50RKG | IC REG LDO 5V .4A DPAK-5 |
| VE-J2J-CX-F2 | CONVERTER MOD DC/DC 36V 75W |
| TPSE477M010R0060 | CAP TANT 470UF 10V 20% 2917 |
| VE-J2J-CX-F1 | CONVERTER MOD DC/DC 36V 75W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16812EVKIT+ | 功能描述:LED 照明开发工具 Evaluation Kit for the MAX16812 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: |
| MAX16813ATP/V+ | 制造商:Maxim Integrated Products 功能描述:IC LED DVR 4CH CTLR/DISC QFN |
| MAX16813ATP/V+T | 功能描述:LED照明驱动器 Integrated 4Ch HB LED Driver RoHS:否 制造商:Maxim Integrated 输入电压: 工作频率: 最大电源电流: 输出电流: 最大工作温度: 安装风格: 封装 / 箱体: |
| MAX16813ATP+ | 制造商:Maxim Integrated Products 功能描述:IC LED DVR 4CH CTLR/DISC QFN |
| MAX16813ATP+T | 功能描述:LED照明驱动器 Integrated 4Ch HB LED Driver RoHS:否 制造商:Maxim Integrated 输入电压: 工作频率: 最大电源电流: 输出电流: 最大工作温度: 安装风格: 封装 / 箱体: |
发布紧急采购，3分钟左右您将得到回复。