参数资料
型号: MAX16812ATI+T
厂商: Maxim Integrated
文件页数: 1/21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:
拓扑: 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
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
19-0880; Rev 0; 7/07
ATION
EVALU
AVAILA
KIT
BLE
Integrated High-Voltage LED Driver
with Analog and PWM Dimming Control
General Description
Features
The MAX16812 is a peak-current-mode LED driver with
an integrated 0.2 ? power MOSFET designed to control
the current in a single string of high-brightness LEDs
(HB LEDs). The MAX16812 can be used in multiple
converter topologies such as buck, boost, or buck-
boost. The MAX16812 operates over a 5.5V to 76V wide
supply voltage range.
The MAX16812 features a low-frequency, wide-range
brightness adjustment (100:1), analog and PWM dim-
ming control input, as well as a resistor-programmable
EMI suppression circuitry to control the rise and fall
times of the internal switching MOSFET. A high-side
LED current-sense amplifier and a dimming MOSFET
driver are also included, simplifying the design and
reducing the total component count.
The MAX16812 uses peak-current-mode control,
adjustable slope compensation that allows for addition-
al design flexibility. The device has two current regula-
tion loops. The first loop controls the internal switching
MOSFET peak current, while the second current regula-
o
o
o
o
o
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o
o
o
o
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o
Integrated 76V, 0.2 ? (typ) Power MOSFET
5.5V to 76V Wide Input Range
Adjustable LED Current with 5% Accuracy
Floating Differential LED Current-Sense Amplifier
Floating Dimming N-Channel MOSFET Driver
PWM LED Dimming with:
PWM Control Signal
Analog Control Signal
Chopped V IN Input
Peak-Current-Mode Control
125kHz to 500kHz Adjustable Switching Frequency
Adjustable UVLO and Soft-Start
Output Overvoltage Protection
5 μ s LED Current Rise/Fall Times During Dimming
Minimize EMI
Overtemperature and Short-Circuit Protection
Ordering Information
tion loop controls the LED current. Switching frequency
can be adjusted from 125kHz to 500kHz.
Additional features include adjustable UVLO, soft-start,
external enable/disable input, thermal shutdown, a
PART
MAX16812ATI+
TEMP RANGE
-40°C to +125°C
PIN- PKG
PACKAGE CODE
28 TQFN-EP* T2855-8
1.238V 1% accurate buffered reference, and an on-
chip oscillator. An internal 5.2V linear regulator supplies
up to 20mA to power external devices.
The MAX16812 is available in a thermally enhanced
5mm x 5mm, 28-pin TQFN-EP package and is specified
over the automotive -40°C to +125°C temperature range.
+Denotes a lead-free package.
*EP = Exposed pad.
Simplified Diagram
C H_REG
Automotive Lighting:
Applications
R CS
DOUT
VOUT
C OUT
DRL, Fog Lights
Rear Combination Lights
Front and Rear Signal Lights
Interior Lighting
V IN
C IN
LV
IN
EN
SRC
GT
R SRC
Warning and Emergency Lighting
Architectural and Industrial Lighting
RT
R TGRM
RT
MAX16812
DRV
SLP
L_REG
TGRM
C SLP
C TGRM
VOUT
DIM
R OV1
COMP
C COMP1
Typical Application Circuit and Pin Configuration appear at
end of data sheet.
R OV2
R COMP1
BUCK-BOOST CONFIGURATION
R COMP2
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
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