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参数资料
| 型号： | MAX16812ATI+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 7/21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： | 60 |
| 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： | 托盘 |
| 工作温度： | -40°C ~ 125°C |
| 产品目录页面： | 1425 (CN2011-ZH PDF) |
Integrated High-Voltage LED Driver
with Analog and PWM Dimming Control
Pin Description
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20, 21
22, 23
24
25
26
27
28
—
NAME
FB
COMP
REFI
REF
CS_OUT
AGND
EN
IN
L_REG
SGND
DD
DGT
CS+
CS-
LV
H_REG
HV
DRV
GT
LX
SRC
SLP
TGRM
DIM
RT
OV
EP
FUNCTION
Low-Side Error Amplifier’s Inverting Input
Low-Side Error Amplifier’s Output. Connect a compensation network from COMP to FB for stable operation.
Reference Input. V REFI provides the reference voltage for the high-side current-sense amplifier to set the
LED current.
+1.23V Reference Output. Connect an appropriate soft-start capacitor from REF to AGND.
High-Side Current-Sense Amplifier Output. V CS_OUT is proportional to the current through R CS .
Analog Ground
Enable Input/Undervoltage Lockout. Connect EN to IN through a resistive voltage-divider to program the
UVLO threshold. Connect EN directly to IN to set up the device for 5V internal threshold. Apply a logic-
level input to EN to enable/disable the device.
Positive Power-Supply Input. Bypass with a 1μF ceramic capacitor to AGND.
5V Low-Side Regulator Output. Bypass with a 3.3μF ceramic capacitor to AGND.
Signal Ground
MOSFET’s Drain Voltage-Sense Input. Connect DD to the drain of the external dimming MOSFET.
External Dimming MOSFET’s Gate Drive
High-Side Current-Sense Amplifier’s Positive Input. Connect R CS between CS+ and CS-. CS+ is
referenced to LV.
High-Side Current-Sense Amplifier’s Negative Input. Connect R CS between CS- and CS+. CS- is
referenced to LV.
High-Side Reference Voltage Input. A DC voltage at LV sets the lowest reference point for the high-side
current-sense and dimming MOSFET control circuitry.
High-Side Regulator Output. H_REG provides a regulated supply for high-side circuitry. Bypass with a 1μF
ceramic capacitor to LV.
High-Side Positive Supply Voltage Input. HV provides power for dimming and LED current-sense circuitry.
HV is referenced to LV.
Internal MOSFET Gate Driver Output. Connect to a resistor between DRV and GT to set the rise and fall
times at LX.
Internal MOSFET GATE. Connect a resistor between GT and DRV to set the rise and fall times at LX.
Internal MOSFET Drain
Internal Power MOSFET Source
Slope Compensation Setting. Connect an appropriate external capacitor from SLP to AGND to generate a
ramp signal for stable operation.
Dimming Comparator’s Reference/Ramp Generator
Dimming Control Input
Resistor-Programmable Internal Oscillator Setting. Connect a resistor from RT to AGND to set the internal
oscillator frequency.
Overvoltage Protection Input. Connect OV to HI through a resistive voltage-divider to AGND to set the
overvoltage limit for the load. When the voltage at OV exceeds the 1.238V (typ) threshold, the gate drive
(DRV) for the switching MOSFET is disabled. Once V OV goes below 1.238V by 14mV, the switching
MOSFET turns on again.
Exposed Pad. Connect EP to a large-area ground plane for effective power dissipation. Do not use as the
IC ground connection.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16812ATI/V+ | 功能描述:LED照明驱动器 w/Analog & PWM Dimming Control 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 |
| MAX16812ATI/V+T | 功能描述:LED照明驱动器 w/Analog & PWM Dimming Control 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 |
| MAX16812ATI+ | 功能描述:LED照明驱动器 w/Analog & PWM Dimming Control 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 |
| MAX16812ATI+T | 功能描述:LED照明驱动器 w/Analog & PWM Dimming Control 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 |
| 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: |
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